diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-11-04 18:14:52 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-11-04 18:14:52 +0100 |
| commit | 01be83eea08d6d9f9209843e2e084505fba4053f (patch) | |
| tree | 95b456e1ac40399fd5f55b57ae0936643bea1836 /drivers/firmware | |
| parent | 45ff510517f3b1354a3d9c273ad5e5e8d08312cb (diff) | |
| parent | 9d820f68b2bdba5b2e7bf135123c3f57c5051d05 (diff) | |
Merge branch 'core/urgent' into core/entry
Pick up the entry fix before further modifications.
Diffstat (limited to 'drivers/firmware')
56 files changed, 1521 insertions, 731 deletions
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index fbd785dd0513..3315e3c21586 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -7,7 +7,7 @@ menu "Firmware Drivers" config ARM_SCMI_PROTOCOL - bool "ARM System Control and Management Interface (SCMI) Message Protocol" + tristate "ARM System Control and Management Interface (SCMI) Message Protocol" depends on ARM || ARM64 || COMPILE_TEST depends on MAILBOX help @@ -178,16 +178,15 @@ config ISCSI_IBFT Otherwise, say N. config RASPBERRYPI_FIRMWARE - bool "Raspberry Pi Firmware Driver" + tristate "Raspberry Pi Firmware Driver" depends on BCM2835_MBOX - default USB_PCI help This option enables support for communicating with the firmware on the Raspberry Pi. config FW_CFG_SYSFS tristate "QEMU fw_cfg device support in sysfs" - depends on SYSFS && (ARM || ARM64 || PPC_PMAC || SPARC || X86) + depends on SYSFS && (ARM || ARM64 || PARISC || PPC_PMAC || SPARC || X86) depends on HAS_IOPORT_MAP default n help diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index 99510be9f5ed..5e013b6a3692 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -22,7 +22,7 @@ obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o obj-$(CONFIG_TURRIS_MOX_RWTM) += turris-mox-rwtm.o -obj-$(CONFIG_ARM_SCMI_PROTOCOL) += arm_scmi/ +obj-y += arm_scmi/ obj-y += broadcom/ obj-y += meson/ obj-$(CONFIG_GOOGLE_FIRMWARE) += google/ diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index 6f9cbc4aef22..bc0d54f8e861 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -1,9 +1,11 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-y = scmi-bus.o scmi-driver.o scmi-protocols.o scmi-transport.o scmi-bus-y = bus.o scmi-driver-y = driver.o notify.o scmi-transport-y = shmem.o scmi-transport-$(CONFIG_MAILBOX) += mailbox.o scmi-transport-$(CONFIG_HAVE_ARM_SMCCC_DISCOVERY) += smc.o -scmi-protocols-y = base.o clock.o perf.o power.o reset.o sensors.o +scmi-protocols-y = base.o clock.o perf.o power.o reset.o sensors.o system.o +scmi-module-objs := $(scmi-bus-y) $(scmi-driver-y) $(scmi-protocols-y) \ + $(scmi-transport-y) +obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-module.o obj-$(CONFIG_ARM_SCMI_POWER_DOMAIN) += scmi_pm_domain.o diff --git a/drivers/firmware/arm_scmi/base.c b/drivers/firmware/arm_scmi/base.c index 9853bd3c4d45..017e5d8bd869 100644 --- a/drivers/firmware/arm_scmi/base.c +++ b/drivers/firmware/arm_scmi/base.c @@ -197,6 +197,8 @@ static int scmi_base_implementation_list_get(const struct scmi_handle *handle, protocols_imp[tot_num_ret + loop] = *(list + loop); tot_num_ret += loop_num_ret; + + scmi_reset_rx_to_maxsz(handle, t); } while (loop_num_ret); scmi_xfer_put(handle, t); diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c index db55c43a2cbd..1377ec76a45d 100644 --- a/drivers/firmware/arm_scmi/bus.c +++ b/drivers/firmware/arm_scmi/bus.c @@ -230,7 +230,7 @@ static void scmi_devices_unregister(void) bus_for_each_dev(&scmi_bus_type, NULL, NULL, __scmi_devices_unregister); } -static int __init scmi_bus_init(void) +int __init scmi_bus_init(void) { int retval; @@ -240,12 +240,10 @@ static int __init scmi_bus_init(void) return retval; } -subsys_initcall(scmi_bus_init); -static void __exit scmi_bus_exit(void) +void __exit scmi_bus_exit(void) { scmi_devices_unregister(); bus_unregister(&scmi_bus_type); ida_destroy(&scmi_bus_id); } -module_exit(scmi_bus_exit); diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 75e39882746e..4645677d86f1 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -192,6 +192,8 @@ scmi_clock_describe_rates_get(const struct scmi_handle *handle, u32 clk_id, } tot_rate_cnt += num_returned; + + scmi_reset_rx_to_maxsz(handle, t); /* * check for both returned and remaining to avoid infinite * loop due to buggy firmware @@ -318,7 +320,7 @@ scmi_clock_info_get(const struct scmi_handle *handle, u32 clk_id) return clk; } -static struct scmi_clk_ops clk_ops = { +static const struct scmi_clk_ops clk_ops = { .count_get = scmi_clock_count_get, .info_get = scmi_clock_info_get, .rate_get = scmi_clock_rate_get, @@ -364,9 +366,4 @@ static int scmi_clock_protocol_init(struct scmi_handle *handle) return 0; } -static int __init scmi_clock_init(void) -{ - return scmi_protocol_register(SCMI_PROTOCOL_CLOCK, - &scmi_clock_protocol_init); -} -subsys_initcall(scmi_clock_init); +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_CLOCK, clock) diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index c113e578cc6c..65063fa948d4 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -147,6 +147,8 @@ int scmi_do_xfer_with_response(const struct scmi_handle *h, struct scmi_xfer *xfer); int scmi_xfer_get_init(const struct scmi_handle *h, u8 msg_id, u8 prot_id, size_t tx_size, size_t rx_size, struct scmi_xfer **p); +void scmi_reset_rx_to_maxsz(const struct scmi_handle *handle, + struct scmi_xfer *xfer); int scmi_handle_put(const struct scmi_handle *handle); struct scmi_handle *scmi_handle_get(struct device *dev); void scmi_set_handle(struct scmi_device *scmi_dev); @@ -156,6 +158,30 @@ void scmi_setup_protocol_implemented(const struct scmi_handle *handle, int scmi_base_protocol_init(struct scmi_handle *h); +int __init scmi_bus_init(void); +void __exit scmi_bus_exit(void); + +#define DECLARE_SCMI_REGISTER_UNREGISTER(func) \ + int __init scmi_##func##_register(void); \ + void __exit scmi_##func##_unregister(void) +DECLARE_SCMI_REGISTER_UNREGISTER(clock); +DECLARE_SCMI_REGISTER_UNREGISTER(perf); +DECLARE_SCMI_REGISTER_UNREGISTER(power); +DECLARE_SCMI_REGISTER_UNREGISTER(reset); +DECLARE_SCMI_REGISTER_UNREGISTER(sensors); +DECLARE_SCMI_REGISTER_UNREGISTER(system); + +#define DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(id, name) \ +int __init scmi_##name##_register(void) \ +{ \ + return scmi_protocol_register((id), &scmi_##name##_protocol_init); \ +} \ +\ +void __exit scmi_##name##_unregister(void) \ +{ \ + scmi_protocol_unregister((id)); \ +} + /* SCMI Transport */ /** * struct scmi_chan_info - Structure representing a SCMI channel information @@ -210,7 +236,7 @@ struct scmi_transport_ops { * @max_msg_size: Maximum size of data per message that can be handled. */ struct scmi_desc { - struct scmi_transport_ops *ops; + const struct scmi_transport_ops *ops; int max_rx_timeout_ms; int max_msg; int max_msg_size; diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 03ec74242c14..3dfd8b6a0ebf 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -402,6 +402,14 @@ int scmi_do_xfer(const struct scmi_handle *handle, struct scmi_xfer *xfer) return ret; } +void scmi_reset_rx_to_maxsz(const struct scmi_handle *handle, + struct scmi_xfer *xfer) +{ + struct scmi_info *info = handle_to_scmi_info(handle); + + xfer->rx.len = info->desc->max_msg_size; +} + #define SCMI_MAX_RESPONSE_TIMEOUT (2 * MSEC_PER_SEC) /** @@ -730,6 +738,7 @@ struct scmi_prot_devnames { static struct scmi_prot_devnames devnames[] = { { SCMI_PROTOCOL_POWER, { "genpd" },}, + { SCMI_PROTOCOL_SYSTEM, { "syspower" },}, { SCMI_PROTOCOL_PERF, { "cpufreq" },}, { SCMI_PROTOCOL_CLOCK, { "clocks" },}, { SCMI_PROTOCOL_SENSOR, { "hwmon" },}, @@ -928,7 +937,35 @@ static struct platform_driver scmi_driver = { .remove = scmi_remove, }; -module_platform_driver(scmi_driver); +static int __init scmi_driver_init(void) +{ + scmi_bus_init(); + + scmi_clock_register(); + scmi_perf_register(); + scmi_power_register(); + scmi_reset_register(); + scmi_sensors_register(); + scmi_system_register(); + + return platform_driver_register(&scmi_driver); +} +subsys_initcall(scmi_driver_init); + +static void __exit scmi_driver_exit(void) +{ + scmi_bus_exit(); + + scmi_clock_unregister(); + scmi_perf_unregister(); + scmi_power_unregister(); + scmi_reset_unregister(); + scmi_sensors_unregister(); + scmi_system_unregister(); + + platform_driver_unregister(&scmi_driver); +} +module_exit(scmi_driver_exit); MODULE_ALIAS("platform: arm-scmi"); MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>"); diff --git a/drivers/firmware/arm_scmi/mailbox.c b/drivers/firmware/arm_scmi/mailbox.c index 6998dc86b5ce..4626404be541 100644 --- a/drivers/firmware/arm_scmi/mailbox.c +++ b/drivers/firmware/arm_scmi/mailbox.c @@ -110,7 +110,7 @@ static int mailbox_chan_free(int id, void *p, void *data) struct scmi_chan_info *cinfo = p; struct scmi_mailbox *smbox = cinfo->transport_info; - if (!IS_ERR(smbox->chan)) { + if (smbox && !IS_ERR(smbox->chan)) { mbox_free_channel(smbox->chan); cinfo->transport_info = NULL; smbox->chan = NULL; @@ -181,7 +181,7 @@ mailbox_poll_done(struct scmi_chan_info *cinfo, struct scmi_xfer *xfer) return shmem_poll_done(smbox->shmem, xfer); } -static struct scmi_transport_ops scmi_mailbox_ops = { +static const struct scmi_transport_ops scmi_mailbox_ops = { .chan_available = mailbox_chan_available, .chan_setup = mailbox_chan_setup, .chan_free = mailbox_chan_free, diff --git a/drivers/firmware/arm_scmi/notify.c b/drivers/firmware/arm_scmi/notify.c index 4731daaacd19..ce336899d636 100644 --- a/drivers/firmware/arm_scmi/notify.c +++ b/drivers/firmware/arm_scmi/notify.c @@ -1403,15 +1403,21 @@ static void scmi_protocols_late_init(struct work_struct *work) "finalized PENDING handler - key:%X\n", hndl->key); ret = scmi_event_handler_enable_events(hndl); + if (ret) { + dev_dbg(ni->handle->dev, + "purging INVALID handler - key:%X\n", + hndl->key); + scmi_put_active_handler(ni, hndl); + } } else { ret = scmi_valid_pending_handler(ni, hndl); - } - if (ret) { - dev_dbg(ni->handle->dev, - "purging PENDING handler - key:%X\n", - hndl->key); - /* this hndl can be only a pending one */ - scmi_put_handler_unlocked(ni, hndl); + if (ret) { + dev_dbg(ni->handle->dev, + "purging PENDING handler - key:%X\n", + hndl->key); + /* this hndl can be only a pending one */ + scmi_put_handler_unlocked(ni, hndl); + } } } mutex_unlock(&ni->pending_mtx); @@ -1421,7 +1427,7 @@ static void scmi_protocols_late_init(struct work_struct *work) * notify_ops are attached to the handle so that can be accessed * directly from an scmi_driver to register its own notifiers. */ -static struct scmi_notify_ops notify_ops = { +static const struct scmi_notify_ops notify_ops = { .register_event_notifier = scmi_register_notifier, .unregister_event_notifier = scmi_unregister_notifier, }; @@ -1468,7 +1474,7 @@ int scmi_notification_init(struct scmi_handle *handle) ni->gid = gid; ni->handle = handle; - ni->notify_wq = alloc_workqueue("scmi_notify", + ni->notify_wq = alloc_workqueue(dev_name(handle->dev), WQ_UNBOUND | WQ_FREEZABLE | WQ_SYSFS, 0); if (!ni->notify_wq) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index 3e1e87012c95..82fb3babff72 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -304,6 +304,8 @@ scmi_perf_describe_levels_get(const struct scmi_handle *handle, u32 domain, } tot_opp_cnt += num_returned; + + scmi_reset_rx_to_maxsz(handle, t); /* * check for both returned and remaining to avoid infinite * loop due to buggy firmware @@ -748,7 +750,7 @@ static bool scmi_fast_switch_possible(const struct scmi_handle *handle, return dom->fc_info && dom->fc_info->level_set_addr; } -static struct scmi_perf_ops perf_ops = { +static const struct scmi_perf_ops perf_ops = { .limits_set = scmi_perf_limits_set, .limits_get = scmi_perf_limits_get, .level_set = scmi_perf_level_set, @@ -890,9 +892,4 @@ static int scmi_perf_protocol_init(struct scmi_handle *handle) return 0; } -static int __init scmi_perf_init(void) -{ - return scmi_protocol_register(SCMI_PROTOCOL_PERF, - &scmi_perf_protocol_init); -} -subsys_initcall(scmi_perf_init); +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_PERF, perf) diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c index 46f213644c49..1f37258e9bee 100644 --- a/drivers/firmware/arm_scmi/power.c +++ b/drivers/firmware/arm_scmi/power.c @@ -184,7 +184,7 @@ static char *scmi_power_name_get(const struct scmi_handle *handle, u32 domain) return dom->name; } -static struct scmi_power_ops power_ops = { +static const struct scmi_power_ops power_ops = { .num_domains_get = scmi_power_num_domains_get, .name_get = scmi_power_name_get, .state_set = scmi_power_state_set, @@ -301,9 +301,4 @@ static int scmi_power_protocol_init(struct scmi_handle *handle) return 0; } -static int __init scmi_power_init(void) -{ - return scmi_protocol_register(SCMI_PROTOCOL_POWER, - &scmi_power_protocol_init); -} -subsys_initcall(scmi_power_init); +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_POWER, power) diff --git a/drivers/firmware/arm_scmi/reset.c b/drivers/firmware/arm_scmi/reset.c index 3691bafca057..a981a22cfe89 100644 --- a/drivers/firmware/arm_scmi/reset.c +++ b/drivers/firmware/arm_scmi/reset.c @@ -36,9 +36,7 @@ struct scmi_msg_reset_domain_reset { #define EXPLICIT_RESET_ASSERT BIT(1) #define ASYNCHRONOUS_RESET BIT(2) __le32 reset_state; -#define ARCH_RESET_TYPE BIT(31) -#define COLD_RESET_STATE BIT(0) -#define ARCH_COLD_RESET (ARCH_RESET_TYPE | COLD_RESET_STATE) +#define ARCH_COLD_RESET 0 }; struct scmi_msg_reset_notify { @@ -194,7 +192,7 @@ scmi_reset_domain_deassert(const struct scmi_handle *handle, u32 domain) return scmi_domain_reset(handle, domain, 0, ARCH_COLD_RESET); } -static struct scmi_reset_ops reset_ops = { +static const struct scmi_reset_ops reset_ops = { .num_domains_get = scmi_reset_num_domains_get, .name_get = scmi_reset_name_get, .latency_get = scmi_reset_latency_get, @@ -313,9 +311,4 @@ static int scmi_reset_protocol_init(struct scmi_handle *handle) return 0; } -static int __init scmi_reset_init(void) -{ - return scmi_protocol_register(SCMI_PROTOCOL_RESET, - &scmi_reset_protocol_init); -} -subsys_initcall(scmi_reset_init); +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_RESET, reset) diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c index 1af0ad362e82..b4232d611033 100644 --- a/drivers/firmware/arm_scmi/sensors.c +++ b/drivers/firmware/arm_scmi/sensors.c @@ -166,6 +166,8 @@ static int scmi_sensor_description_get(const struct scmi_handle *handle, } desc_index += num_returned; + + scmi_reset_rx_to_maxsz(handle, t); /* * check for both returned and remaining to avoid infinite * loop due to buggy firmware @@ -275,7 +277,7 @@ static int scmi_sensor_count_get(const struct scmi_handle *handle) return si->num_sensors; } -static struct scmi_sensor_ops sensor_ops = { +static const struct scmi_sensor_ops sensor_ops = { .count_get = scmi_sensor_count_get, .info_get = scmi_sensor_info_get, .trip_point_config = scmi_sensor_trip_point_config, @@ -365,9 +367,4 @@ static int scmi_sensors_protocol_init(struct scmi_handle *handle) return 0; } -static int __init scmi_sensors_init(void) -{ - return scmi_protocol_register(SCMI_PROTOCOL_SENSOR, - &scmi_sensors_protocol_init); -} -subsys_initcall(scmi_sensors_init); +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_SENSOR, sensors) diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/smc.c index a1537d123e38..82a82a5dc86a 100644 --- a/drivers/firmware/arm_scmi/smc.c +++ b/drivers/firmware/arm_scmi/smc.c @@ -137,7 +137,7 @@ smc_poll_done(struct scmi_chan_info *cinfo, struct scmi_xfer *xfer) return shmem_poll_done(scmi_info->shmem, xfer); } -static struct scmi_transport_ops scmi_smc_ops = { +static const struct scmi_transport_ops scmi_smc_ops = { .chan_available = smc_chan_available, .chan_setup = smc_chan_setup, .chan_free = smc_chan_free, @@ -149,6 +149,6 @@ static struct scmi_transport_ops scmi_smc_ops = { const struct scmi_desc scmi_smc_desc = { .ops = &scmi_smc_ops, .max_rx_timeout_ms = 30, - .max_msg = 1, + .max_msg = 20, .max_msg_size = 128, }; diff --git a/drivers/firmware/arm_scmi/system.c b/drivers/firmware/arm_scmi/system.c new file mode 100644 index 000000000000..283e12d5f24b --- /dev/null +++ b/drivers/firmware/arm_scmi/system.c @@ -0,0 +1,131 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * System Control and Management Interface (SCMI) System Power Protocol + * + * Copyright (C) 2020 ARM Ltd. + */ + +#define pr_fmt(fmt) "SCMI Notifications SYSTEM - " fmt + +#include <linux/scmi_protocol.h> + +#include "common.h" +#include "notify.h" + +#define SCMI_SYSTEM_NUM_SOURCES 1 + +enum scmi_system_protocol_cmd { + SYSTEM_POWER_STATE_NOTIFY = 0x5, +}; + +struct scmi_system_power_state_notify { + __le32 notify_enable; +}; + +struct scmi_system_power_state_notifier_payld { + __le32 agent_id; + __le32 flags; + __le32 system_state; +}; + +struct scmi_system_info { + u32 version; +}; + +static int scmi_system_request_notify(const struct scmi_handle *handle, + bool enable) +{ + int ret; + struct scmi_xfer *t; + struct scmi_system_power_state_notify *notify; + + ret = scmi_xfer_get_init(handle, SYSTEM_POWER_STATE_NOTIFY, + SCMI_PROTOCOL_SYSTEM, sizeof(*notify), 0, &t); + if (ret) + return ret; + + notify = t->tx.buf; + notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; + + ret = scmi_do_xfer(handle, t); + + scmi_xfer_put(handle, t); + return ret; +} + +static int scmi_system_set_notify_enabled(const struct scmi_handle *handle, + u8 evt_id, u32 src_id, bool enable) +{ + int ret; + + ret = scmi_system_request_notify(handle, enable); + if (ret) + pr_debug("FAIL_ENABLE - evt[%X] - ret:%d\n", evt_id, ret); + + return ret; +} + +static void *scmi_system_fill_custom_report(const struct scmi_handle *handle, + u8 evt_id, ktime_t timestamp, + const void *payld, size_t payld_sz, + void *report, u32 *src_id) +{ + const struct scmi_system_power_state_notifier_payld *p = payld; + struct scmi_system_power_state_notifier_report *r = report; + + if (evt_id != SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER || + sizeof(*p) != payld_sz) + return NULL; + + r->timestamp = timestamp; + r->agent_id = le32_to_cpu(p->agent_id); + r->flags = le32_to_cpu(p->flags); + r->system_state = le32_to_cpu(p->system_state); + *src_id = 0; + + return r; +} + +static const struct scmi_event system_events[] = { + { + .id = SCMI_EVENT_SYSTEM_POWER_STATE_NOTIFIER, + .max_payld_sz = + sizeof(struct scmi_system_power_state_notifier_payld), + .max_report_sz = + sizeof(struct scmi_system_power_state_notifier_report), + }, +}; + +static const struct scmi_event_ops system_event_ops = { + .set_notify_enabled = scmi_system_set_notify_enabled, + .fill_custom_report = scmi_system_fill_custom_report, +}; + +static int scmi_system_protocol_init(struct scmi_handle *handle) +{ + u32 version; + struct scmi_system_info *pinfo; + + scmi_version_get(handle, SCMI_PROTOCOL_SYSTEM, &version); + + dev_dbg(handle->dev, "System Power Version %d.%d\n", + PROTOCOL_REV_MAJOR(version), PROTOCOL_REV_MINOR(version)); + + pinfo = devm_kzalloc(handle->dev, sizeof(*pinfo), GFP_KERNEL); + if (!pinfo) + return -ENOMEM; + + scmi_register_protocol_events(handle, + SCMI_PROTOCOL_SYSTEM, SCMI_PROTO_QUEUE_SZ, + &system_event_ops, + system_events, + ARRAY_SIZE(system_events), + SCMI_SYSTEM_NUM_SOURCES); + + pinfo->version = version; + handle->system_priv = pinfo; + + return 0; +} + +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_SYSTEM, system) diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c index b4b9ce97f415..840754dcc6ca 100644 --- a/drivers/firmware/arm_sdei.c +++ b/drivers/firmware/arm_sdei.c @@ -78,11 +78,26 @@ struct sdei_crosscall_args { int first_error; }; -#define CROSSCALL_INIT(arg, event) (arg.event = event, \ - arg.first_error = 0, \ - atomic_set(&arg.errors, 0)) +#define CROSSCALL_INIT(arg, event) \ + do { \ + arg.event = event; \ + arg.first_error = 0; \ + atomic_set(&arg.errors, 0); \ + } while (0) + +static inline int sdei_do_local_call(smp_call_func_t fn, + struct sdei_event *event) +{ + struct sdei_crosscall_args arg; + + CROSSCALL_INIT(arg, event); + fn(&arg); -static inline int sdei_do_cross_call(void *fn, struct sdei_event * event) + return arg.first_error; +} + +static inline int sdei_do_cross_call(smp_call_func_t fn, + struct sdei_event *event) { struct sdei_crosscall_args arg; @@ -114,26 +129,7 @@ static int sdei_to_linux_errno(unsigned long sdei_err) return -ENOMEM; } - /* Not an error value ... */ - return sdei_err; -} - -/* - * If x0 is any of these values, then the call failed, use sdei_to_linux_errno() - * to translate. - */ -static int sdei_is_err(struct arm_smccc_res *res) -{ - switch (res->a0) { - case SDEI_NOT_SUPPORTED: - case SDEI_INVALID_PARAMETERS: - case SDEI_DENIED: - case SDEI_PENDING: - case SDEI_OUT_OF_RESOURCE: - return true; - } - - return false; + return 0; } static int invoke_sdei_fn(unsigned long function_id, unsigned long arg0, @@ -141,14 +137,13 @@ static int invoke_sdei_fn(unsigned long function_id, unsigned long arg0, unsigned long arg3, unsigned long arg4, u64 *result) { - int err = 0; + int err; struct arm_smccc_res res; if (sdei_firmware_call) { sdei_firmware_call(function_id, arg0, arg1, arg2, arg3, arg4, &res); - if (sdei_is_err(&res)) - err = sdei_to_linux_errno(res.a0); + err = sdei_to_linux_errno(res.a0); } else { /* * !sdei_firmware_call means we failed to probe or called @@ -210,36 +205,34 @@ static struct sdei_event *sdei_event_create(u32 event_num, lockdep_assert_held(&sdei_events_lock); event = kzalloc(sizeof(*event), GFP_KERNEL); - if (!event) - return ERR_PTR(-ENOMEM); + if (!event) { + err = -ENOMEM; + goto fail; + } INIT_LIST_HEAD(&event->list); event->event_num = event_num; err = sdei_api_event_get_info(event_num, SDEI_EVENT_INFO_EV_PRIORITY, &result); - if (err) { - kfree(event); - return ERR_PTR(err); - } + if (err) + goto fail; event->priority = result; err = sdei_api_event_get_info(event_num, SDEI_EVENT_INFO_EV_TYPE, &result); - if (err) { - kfree(event); - return ERR_PTR(err); - } + if (err) + goto fail; event->type = result; if (event->type == SDEI_EVENT_TYPE_SHARED) { reg = kzalloc(sizeof(*reg), GFP_KERNEL); if (!reg) { - kfree(event); - return ERR_PTR(-ENOMEM); + err = -ENOMEM; + goto fail; } - reg->event_num = event_num; + reg->event_num = event->event_num; reg->priority = event->priority; reg->callback = cb; @@ -251,8 +244,8 @@ static struct sdei_event *sdei_event_create(u32 event_num, regs = alloc_percpu(struct sdei_registered_event); if (!regs) { - kfree(event); - return ERR_PTR(-ENOMEM); + err = -ENOMEM; + goto fail; } for_each_possible_cpu(cpu) { @@ -272,6 +265,10 @@ static struct sdei_event *sdei_event_create(u32 event_num, spin_unlock(&sdei_list_lock); return event; + +fail: + kfree(event); + return ERR_PTR(err); } static void sdei_event_destroy_llocked(struct sdei_event *event) @@ -490,16 +487,6 @@ static void _local_event_unregister(void *data) sdei_cross_call_return(arg, err); } -static int _sdei_event_unregister(struct sdei_event *event) -{ - lockdep_assert_held(&sdei_events_lock); - - if (event->type == SDEI_EVENT_TYPE_SHARED) - return sdei_api_event_unregister(event->event_num); - - return sdei_do_cross_call(_local_event_unregister, event); -} - int sdei_event_unregister(u32 event_num) { int err; @@ -509,24 +496,27 @@ int sdei_event_unregister(u32 event_num) mutex_lock(&sdei_events_lock); event = sdei_event_find(event_num); - do { - if (!event) { - pr_warn("Event %u not registered\n", event_num); - err = -ENOENT; - break; - } + if (!event) { + pr_warn("Event %u not registered\n", event_num); + err = -ENOENT; + goto unlock; + } - spin_lock(&sdei_list_lock); - event->reregister = false; - event->reenable = false; - spin_unlock(&sdei_list_lock); + spin_lock(&sdei_list_lock); + event->reregister = false; + event->reenable = false; + spin_unlock(&sdei_list_lock); - err = _sdei_event_unregister(event); - if (err) - break; + if (event->type == SDEI_EVENT_TYPE_SHARED) + err = sdei_api_event_unregister(event->event_num); + else + err = sdei_do_cross_call(_local_event_unregister, event); - sdei_event_destroy(event); - } while (0); + if (err) + goto unlock; + + sdei_event_destroy(event); +unlock: mutex_unlock(&sdei_events_lock); return err; @@ -547,7 +537,7 @@ static int sdei_unregister_shared(void) if (event->type != SDEI_EVENT_TYPE_SHARED) continue; - err = _sdei_event_unregister(event); + err = sdei_api_event_unregister(event->event_num); if (err) break; } @@ -581,25 +571,6 @@ static void _local_event_register(void *data) sdei_cross_call_return(arg, err); } -static int _sdei_event_register(struct sdei_event *event) -{ - int err; - - lockdep_assert_held(&sdei_events_lock); - - if (event->type == SDEI_EVENT_TYPE_SHARED) - return sdei_api_event_register(event->event_num, - sdei_entry_point, - event->registered, - SDEI_EVENT_REGISTER_RM_ANY, 0); - - err = sdei_do_cross_call(_local_event_register, event); - if (err) - sdei_do_cross_call(_local_event_unregister, event); - - return err; -} - int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg) { int err; @@ -608,63 +579,44 @@ int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg) WARN_ON(in_nmi()); mutex_lock(&sdei_events_lock); - do { - if (sdei_event_find(event_num)) { - pr_warn("Event %u already registered\n", event_num); - err = -EBUSY; - break; - } - - event = sdei_event_create(event_num, cb, arg); - if (IS_ERR(event)) { - err = PTR_ERR(event); - pr_warn("Failed to create event %u: %d\n", event_num, - err); - break; - } - - cpus_read_lock(); - err = _sdei_event_register(event); - if (err) { - sdei_event_destroy(event); - pr_warn("Failed to register event %u: %d\n", event_num, - err); - } else { - spin_lock(&sdei_list_lock); - event->reregister = true; - spin_unlock(&sdei_list_lock); - } - cpus_read_unlock(); - } while (0); - mutex_unlock(&sdei_events_lock); - - return err; -} - -static int sdei_reregister_event_llocked(struct sdei_event *event) -{ - int err; - - lockdep_assert_held(&sdei_events_lock); - lockdep_assert_held(&sdei_list_lock); + if (sdei_event_find(event_num)) { + pr_warn("Event %u already registered\n", event_num); + err = -EBUSY; + goto unlock; + } - err = _sdei_event_register(event); - if (err) { - pr_err("Failed to re-register event %u\n", event->event_num); - sdei_event_destroy_llocked(event); - return err; + event = sdei_event_create(event_num, cb, arg); + if (IS_ERR(event)) { + err = PTR_ERR(event); + pr_warn("Failed to create event %u: %d\n", event_num, err); + goto unlock; } - if (event->reenable) { - if (event->type == SDEI_EVENT_TYPE_SHARED) - err = sdei_api_event_enable(event->event_num); - else - err = sdei_do_cross_call(_local_event_enable, event); + cpus_read_lock(); + if (event->type == SDEI_EVENT_TYPE_SHARED) { + err = sdei_api_event_register(event->event_num, + sdei_entry_point, + event->registered, + SDEI_EVENT_REGISTER_RM_ANY, 0); + } else { + err = sdei_do_cross_call(_local_event_register, event); + if (err) + sdei_do_cross_call(_local_event_unregister, event); } - if (err) - pr_err("Failed to re-enable event %u\n", event->event_num); + if (err) { + sdei_event_destroy(event); + pr_warn("Failed to register event %u: %d\n", event_num, err); + goto cpu_unlock; + } + spin_lock(&sdei_list_lock); + event->reregister = true; + spin_unlock(&sdei_list_lock); +cpu_unlock: + cpus_read_unlock(); +unlock: + mutex_unlock(&sdei_events_lock); return err; } @@ -680,9 +632,24 @@ static int sdei_reregister_shared(void) continue; if (event->reregister) { - err = sdei_reregister_event_llocked(event); - if (err) + err = sdei_api_event_register(event->event_num, + sdei_entry_point, event->registered, + SDEI_EVENT_REGISTER_RM_ANY, 0); + if (err) { + pr_err("Failed to re-register event %u\n", + event->event_num); + sdei_event_destroy_llocked(event); break; + } + } + + if (event->reenable) { + err = sdei_api_event_enable(event->event_num); + if (err) { + pr_err("Failed to re-enable event %u\n", + event->event_num); + break; + } } } spin_unlock(&sdei_list_lock); @@ -694,7 +661,7 @@ static int sdei_reregister_shared(void) static int sdei_cpuhp_down(unsigned int cpu) { struct sdei_event *event; - struct sdei_crosscall_args arg; + int err; /* un-register private events */ spin_lock(&sdei_list_lock); @@ -702,12 +669,11 @@ static int sdei_cpuhp_down(unsigned int cpu) if (event->type == SDEI_EVENT_TYPE_SHARED) continue; - CROSSCALL_INIT(arg, event); - /* call the cross-call function locally... */ - _local_event_unregister(&arg); - if (arg.first_error) + err = sdei_do_local_call(_local_event_unregister, event); + if (err) { pr_err("Failed to unregister event %u: %d\n", - event->event_num, arg.first_error); + event->event_num, err); + } } spin_unlock(&sdei_list_lock); @@ -717,7 +683,7 @@ static int sdei_cpuhp_down(unsigned int cpu) static int sdei_cpuhp_up(unsigned int cpu) { struct sdei_event *event; - struct sdei_crosscall_args arg; + int err; /* re-register/enable private events */ spin_lock(&sdei_list_lock); @@ -726,20 +692,19 @@ static int sdei_cpuhp_up(unsigned int cpu) continue; if (event->reregister) { - CROSSCALL_INIT(arg, event); - /* call the cross-call function locally... */ - _local_event_register(&arg); - if (arg.first_error) + err = sdei_do_local_call(_local_event_register, event); + if (err) { pr_err("Failed to re-register event %u: %d\n", - event->event_num, arg.first_error); + event->event_num, err); + } } if (event->reenable) { - CROSSCALL_INIT(arg, event); - _local_event_enable(&arg); - if (arg.first_error) + err = sdei_do_local_call(_local_event_enable, event); + if (err) { pr_err("Failed to re-enable event %u: %d\n", - event->event_num, arg.first_error); + event->event_num, err); + } } } spin_unlock(&sdei_list_lock); @@ -976,7 +941,7 @@ static int sdei_get_conduit(struct platform_device *pdev) } pr_warn("invalid \"method\" property: %s\n", method); - } else if (IS_ENABLED(CONFIG_ACPI) && !acpi_disabled) { + } else if (!acpi_disabled) { if (acpi_psci_use_hvc()) { sdei_firmware_call = &sdei_smccc_hvc; return SMCCC_CONDUIT_HVC; @@ -1000,8 +965,6 @@ static int sdei_probe(struct platform_device *pdev) return 0; err = sdei_api_get_version(&ver); - if (err == -EOPNOTSUPP) - pr_err("advertised but not implemented in platform firmware\n"); if (err) { pr_err("Failed to get SDEI version: %d\n", err); sdei_mark_interface_broken(); @@ -1099,16 +1062,20 @@ static bool __init sdei_present_acpi(void) static int __init sdei_init(void) { - int ret = platform_driver_register(&sdei_driver); - - if (!ret && sdei_present_acpi()) { - struct platform_device *pdev; - - pdev = platform_device_register_simple(sdei_driver.driver.name, - 0, NULL, 0); - if (IS_ERR(pdev)) - pr_info("Failed to register ACPI:SDEI platform device %ld\n", - PTR_ERR(pdev)); + struct platform_device *pdev; + int ret; + + ret = platform_driver_register(&sdei_driver); + if (ret || !sdei_present_acpi()) + return ret; + + pdev = platform_device_register_simple(sdei_driver.driver.name, + 0, NULL, 0); + if (IS_ERR(pdev)) { + ret = PTR_ERR(pdev); + platform_driver_unregister(&sdei_driver); + pr_info("Failed to register ACPI:SDEI platform device %d\n", + ret); } return ret; diff --git a/drivers/firmware/broadcom/bcm47xx_sprom.c b/drivers/firmware/broadcom/bcm47xx_sprom.c index 4787f86c8ac1..14fbcd11657c 100644 --- a/drivers/firmware/broadcom/bcm47xx_sprom.c +++ b/drivers/firmware/broadcom/bcm47xx_sprom.c @@ -27,6 +27,7 @@ */ #include <linux/bcm47xx_nvram.h> +#include <linux/bcm47xx_sprom.h> #include <linux/bcma/bcma.h> #include <linux/etherdevice.h> #include <linux/if_ether.h> diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c index 5066d1f1d687..d51ca0428bb8 100644 --- a/drivers/firmware/dmi_scan.c +++ b/drivers/firmware/dmi_scan.c @@ -21,7 +21,7 @@ EXPORT_SYMBOL_GPL(dmi_kobj); /* * DMI stands for "Desktop Management Interface". It is part * of and an antecedent to, SMBIOS, which stands for System - * Management BIOS. See further: http://www.dmtf.org/standards + * Management BIOS. See further: https://www.dmtf.org/standards */ static const char dmi_empty_string[] = ""; diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig index 3939699e62fe..36ec1f718893 100644 --- a/drivers/firmware/efi/Kconfig +++ b/drivers/firmware/efi/Kconfig @@ -4,20 +4,15 @@ menu "EFI (Extensible Firmware Interface) Support" config EFI_VARS tristate "EFI Variable Support via sysfs" - depends on EFI + depends on EFI && (X86 || IA64) default n help If you say Y here, you are able to get EFI (Extensible Firmware Interface) variable information via sysfs. You may read, write, create, and destroy EFI variables through this interface. - - Note that using this driver in concert with efibootmgr requires - at least test release version 0.5.0-test3 or later, which is - available from: - <http://linux.dell.com/efibootmgr/testing/efibootmgr-0.5.0-test3.tar.gz> - - Subsequent efibootmgr releases may be found at: - <http://github.com/vathpela/efibootmgr> + Note that this driver is only retained for compatibility with + legacy users: new users should use the efivarfs filesystem + instead. config EFI_ESRT bool @@ -26,7 +21,7 @@ config EFI_ESRT config EFI_VARS_PSTORE tristate "Register efivars backend for pstore" - depends on EFI_VARS && PSTORE + depends on PSTORE default y help Say Y here to enable use efivars as a backend to pstore. This @@ -111,7 +106,7 @@ config EFI_GENERIC_STUB config EFI_ARMSTUB_DTB_LOADER bool "Enable the DTB loader" - depends on EFI_GENERIC_STUB + depends on EFI_GENERIC_STUB && !RISCV default y help Select this config option to add support for the dtb= command @@ -128,6 +123,7 @@ config EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER bool "Enable the command line initrd loader" if !X86 depends on EFI_STUB && (EFI_GENERIC_STUB || X86) default y + depends on !RISCV help Select this config option to add support for the initrd= command line parameter, allowing an initrd that resides on the same volume @@ -137,7 +133,6 @@ config EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER config EFI_BOOTLOADER_CONTROL tristate "EFI Bootloader Control" - depends on EFI_VARS default n help This module installs a reboot hook, such that if reboot() is @@ -281,7 +276,7 @@ config EFI_EARLYCON config EFI_CUSTOM_SSDT_OVERLAYS bool "Load custom ACPI SSDT overlay from an EFI variable" - depends on EFI_VARS && ACPI + depends on EFI && ACPI default ACPI_TABLE_UPGRADE help Allow loading of an ACPI SSDT overlay from an EFI variable specified diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile index 7a216984552b..d6ca2da19339 100644 --- a/drivers/firmware/efi/Makefile +++ b/drivers/firmware/efi/Makefile @@ -28,13 +28,16 @@ obj-$(CONFIG_EFI_DEV_PATH_PARSER) += dev-path-parser.o obj-$(CONFIG_APPLE_PROPERTIES) += apple-properties.o obj-$(CONFIG_EFI_RCI2_TABLE) += rci2-table.o obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE) += embedded-firmware.o +obj-$(CONFIG_LOAD_UEFI_KEYS) += mokvar-table.o fake_map-y += fake_mem.o fake_map-$(CONFIG_X86) += x86_fake_mem.o -arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o +arm-obj-$(CONFIG_EFI) := efi-init.o arm-runtime.o obj-$(CONFIG_ARM) += $(arm-obj-y) obj-$(CONFIG_ARM64) += $(arm-obj-y) +riscv-obj-$(CONFIG_EFI) := efi-init.o riscv-runtime.o +obj-$(CONFIG_RISCV) += $(riscv-obj-y) obj-$(CONFIG_EFI_CAPSULE_LOADER) += capsule-loader.o obj-$(CONFIG_EFI_EARLYCON) += earlycon.o obj-$(CONFIG_UEFI_CPER_ARM) += cper-arm.o diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c index f564e15fbc7e..e15d484b6a5a 100644 --- a/drivers/firmware/efi/cper.c +++ b/drivers/firmware/efi/cper.c @@ -232,10 +232,20 @@ static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) n += scnprintf(msg + n, len - n, "rank: %d ", mem->rank); if (mem->validation_bits & CPER_MEM_VALID_BANK) n += scnprintf(msg + n, len - n, "bank: %d ", mem->bank); + if (mem->validation_bits & CPER_MEM_VALID_BANK_GROUP) + n += scnprintf(msg + n, len - n, "bank_group: %d ", + mem->bank >> CPER_MEM_BANK_GROUP_SHIFT); + if (mem->validation_bits & CPER_MEM_VALID_BANK_ADDRESS) + n += scnprintf(msg + n, len - n, "bank_address: %d ", + mem->bank & CPER_MEM_BANK_ADDRESS_MASK); if (mem->validation_bits & CPER_MEM_VALID_DEVICE) n += scnprintf(msg + n, len - n, "device: %d ", mem->device); - if (mem->validation_bits & CPER_MEM_VALID_ROW) - n += scnprintf(msg + n, len - n, "row: %d ", mem->row); + if (mem->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { + u32 row = mem->row; + + row |= cper_get_mem_extension(mem->validation_bits, mem->extended); + n += scnprintf(msg + n, len - n, "row: %d ", row); + } if (mem->validation_bits & CPER_MEM_VALID_COLUMN) n += scnprintf(msg + n, len - n, "column: %d ", mem->column); if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION) @@ -250,6 +260,9 @@ static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID) scnprintf(msg + n, len - n, "target_id: 0x%016llx ", mem->target_id); + if (mem->validation_bits & CPER_MEM_VALID_CHIP_ID) + scnprintf(msg + n, len - n, "chip_id: %d ", + mem->extended >> CPER_MEM_CHIP_ID_SHIFT); msg[n] = '\0'; return n; @@ -292,6 +305,7 @@ void cper_mem_err_pack(const struct cper_sec_mem_err *mem, cmem->requestor_id = mem->requestor_id; cmem->responder_id = mem->responder_id; cmem->target_id = mem->target_id; + cmem->extended = mem->extended; cmem->rank = mem->rank; cmem->mem_array_handle = mem->mem_array_handle; cmem->mem_dev_handle = mem->mem_dev_handle; diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/efi-init.c index 71c445d20258..f55a92ff12c0 100644 --- a/drivers/firmware/efi/arm-init.c +++ b/drivers/firmware/efi/efi-init.c @@ -236,6 +236,7 @@ void __init efi_init(void) reserve_regions(); efi_esrt_init(); + efi_mokvar_table_init(); memblock_reserve(data.phys_map & PAGE_MASK, PAGE_ALIGN(data.size + (data.phys_map & ~PAGE_MASK))); diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c index feb7fe6f2da7..0ef086e43090 100644 --- a/drivers/firmware/efi/efi-pstore.c +++ b/drivers/firmware/efi/efi-pstore.c @@ -8,6 +8,8 @@ #define DUMP_NAME_LEN 66 +#define EFIVARS_DATA_SIZE_MAX 1024 + static bool efivars_pstore_disable = IS_ENABLED(CONFIG_EFI_VARS_PSTORE_DEFAULT_DISABLE); @@ -18,6 +20,9 @@ module_param_named(pstore_disable, efivars_pstore_disable, bool, 0644); EFI_VARIABLE_BOOTSERVICE_ACCESS | \ EFI_VARIABLE_RUNTIME_ACCESS) +static LIST_HEAD(efi_pstore_list); +static DECLARE_WORK(efivar_work, NULL); + static int efi_pstore_open(struct pstore_info *psi) { psi->data = NULL; @@ -126,7 +131,7 @@ static inline int __efi_pstore_scan_sysfs_exit(struct efivar_entry *entry, if (entry->deleting) { list_del(&entry->list); efivar_entry_iter_end(); - efivar_unregister(entry); + kfree(entry); if (efivar_entry_iter_begin()) return -EINTR; } else if (turn_off_scanning) @@ -169,7 +174,7 @@ static int efi_pstore_sysfs_entry_iter(struct pstore_record *record) { struct efivar_entry **pos = (struct efivar_entry **)&record->psi->data; struct efivar_entry *entry, *n; - struct list_head *head = &efivar_sysfs_list; + struct list_head *head = &efi_pstore_list; int size = 0; int ret; @@ -263,8 +268,9 @@ static int efi_pstore_write(struct pstore_record *record) ret = efivar_entry_set_safe(efi_name, vendor, PSTORE_EFI_ATTRIBUTES, preemptible(), record->size, record->psi->buf); - if (record->reason == KMSG_DUMP_OOPS) - efivar_run_worker(); + if (record->reason == KMSG_DUMP_OOPS && try_module_get(THIS_MODULE)) + if (!schedule_work(&efivar_work)) + module_put(THIS_MODULE); return ret; }; @@ -314,12 +320,12 @@ static int efi_pstore_erase_name(const char *name) if (efivar_entry_iter_begin()) return -EINTR; - found = __efivar_entry_iter(efi_pstore_erase_func, &efivar_sysfs_list, + found = __efivar_entry_iter(efi_pstore_erase_func, &efi_pstore_list, efi_name, &entry); efivar_entry_iter_end(); if (found && !entry->scanning) - efivar_unregister(entry); + kfree(entry); return found ? 0 : -ENOENT; } @@ -354,14 +360,77 @@ static struct pstore_info efi_pstore_info = { .erase = efi_pstore_erase, }; +static int efi_pstore_callback(efi_char16_t *name, efi_guid_t vendor, + unsigned long name_size, void *data) +{ + struct efivar_entry *entry; + int ret; + + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return -ENOMEM; + + memcpy(entry->var.VariableName, name, name_size); + entry->var.VendorGuid = vendor; + + ret = efivar_entry_add(entry, &efi_pstore_list); + if (ret) + kfree(entry); + + return ret; +} + +static int efi_pstore_update_entry(efi_char16_t *name, efi_guid_t vendor, + unsigned long name_size, void *data) +{ + struct efivar_entry *entry = data; + + if (efivar_entry_find(name, vendor, &efi_pstore_list, false)) + return 0; + + memcpy(entry->var.VariableName, name, name_size); + memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t)); + + return 1; +} + +static void efi_pstore_update_entries(struct work_struct *work) +{ + struct efivar_entry *entry; + int err; + + /* Add new sysfs entries */ + while (1) { + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return; + + err = efivar_init(efi_pstore_update_entry, entry, + false, &efi_pstore_list); + if (!err) + break; + + efivar_entry_add(entry, &efi_pstore_list); + } + + kfree(entry); + module_put(THIS_MODULE); +} + static __init int efivars_pstore_init(void) { + int ret; + if (!efivars_kobject() || !efivar_supports_writes()) return 0; if (efivars_pstore_disable) return 0; + ret = efivar_init(efi_pstore_callback, NULL, true, &efi_pstore_list); + if (ret) + return ret; + efi_pstore_info.buf = kmalloc(4096, GFP_KERNEL); if (!efi_pstore_info.buf) return -ENOMEM; @@ -374,6 +443,8 @@ static __init int efivars_pstore_init(void) efi_pstore_info.bufsize = 0; } + INIT_WORK(&efivar_work, efi_pstore_update_entries); + return 0; } diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index fdd1db025dbf..5e5480a0a32d 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -43,6 +43,9 @@ struct efi __read_mostly efi = { .esrt = EFI_INVALID_TABLE_ADDR, .tpm_log = EFI_INVALID_TABLE_ADDR, .tpm_final_log = EFI_INVALID_TABLE_ADDR, +#ifdef CONFIG_LOAD_UEFI_KEYS + .mokvar_table = EFI_INVALID_TABLE_ADDR, +#endif }; EXPORT_SYMBOL(efi); @@ -381,6 +384,7 @@ static int __init efisubsys_init(void) efi_kobj = kobject_create_and_add("efi", firmware_kobj); if (!efi_kobj) { pr_err("efi: Firmware registration failed.\n"); + destroy_workqueue(efi_rts_wq); return -ENOMEM; } @@ -424,6 +428,7 @@ err_unregister: generic_ops_unregister(); err_put: kobject_put(efi_kobj); + destroy_workqueue(efi_rts_wq); return error; } @@ -517,6 +522,9 @@ static const efi_config_table_type_t common_tables[] __initconst = { #ifdef CONFIG_EFI_RCI2_TABLE {DELLEMC_EFI_RCI2_TABLE_GUID, &rci2_table_phys }, #endif +#ifdef CONFIG_LOAD_UEFI_KEYS + {LINUX_EFI_MOK_VARIABLE_TABLE_GUID, &efi.mokvar_table, "MOKvar" }, +#endif {}, }; @@ -712,7 +720,7 @@ void __init efi_systab_report_header(const efi_table_hdr_t *systab_hdr, vendor); } -static __initdata char memory_type_name[][20] = { +static __initdata char memory_type_name[][13] = { "Reserved", "Loader Code", "Loader Data", @@ -720,14 +728,14 @@ static __initdata char memory_type_name[][20] = { "Boot Data", "Runtime Code", "Runtime Data", - "Conventional Memory", - "Unusable Memory", - "ACPI Reclaim Memory", - "ACPI Memory NVS", - "Memory Mapped I/O", - "MMIO Port Space", + "Conventional", + "Unusable", + "ACPI Reclaim", + "ACPI Mem NVS", + "MMIO", + "MMIO Port", "PAL Code", - "Persistent Memory", + "Persistent", }; char * __init efi_md_typeattr_format(char *buf, size_t size, @@ -754,26 +762,27 @@ char * __init efi_md_typeattr_format(char *buf, size_t size, if (attr & ~(EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT | EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_RO | EFI_MEMORY_WP | EFI_MEMORY_RP | EFI_MEMORY_XP | - EFI_MEMORY_NV | EFI_MEMORY_SP | + EFI_MEMORY_NV | EFI_MEMORY_SP | EFI_MEMORY_CPU_CRYPTO | EFI_MEMORY_RUNTIME | EFI_MEMORY_MORE_RELIABLE)) snprintf(pos, size, "|attr=0x%016llx]", (unsigned long long)attr); else snprintf(pos, size, - "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", - attr & EFI_MEMORY_RUNTIME ? "RUN" : "", - attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", - attr & EFI_MEMORY_SP ? "SP" : "", - attr & EFI_MEMORY_NV ? "NV" : "", - attr & EFI_MEMORY_XP ? "XP" : "", - attr & EFI_MEMORY_RP ? "RP" : "", - attr & EFI_MEMORY_WP ? "WP" : "", - attr & EFI_MEMORY_RO ? "RO" : "", - attr & EFI_MEMORY_UCE ? "UCE" : "", - attr & EFI_MEMORY_WB ? "WB" : "", - attr & EFI_MEMORY_WT ? "WT" : "", - attr & EFI_MEMORY_WC ? "WC" : "", - attr & EFI_MEMORY_UC ? "UC" : ""); + "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", + attr & EFI_MEMORY_RUNTIME ? "RUN" : "", + attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", + attr & EFI_MEMORY_CPU_CRYPTO ? "CC" : "", + attr & EFI_MEMORY_SP ? "SP" : "", + attr & EFI_MEMORY_NV ? "NV" : "", + attr & EFI_MEMORY_XP ? "XP" : "", + attr & EFI_MEMORY_RP ? "RP" : "", + attr & EFI_MEMORY_WP ? "WP" : "", + attr & EFI_MEMORY_RO ? "RO" : "", + attr & EFI_MEMORY_UCE ? "UCE" : "", + attr & EFI_MEMORY_WB ? "WB" : "", + attr & EFI_MEMORY_WT ? "WT" : "", + attr & EFI_MEMORY_WC ? "WC" : "", + attr & EFI_MEMORY_UC ? "UC" : ""); return buf; } diff --git a/drivers/firmware/efi/efibc.c b/drivers/firmware/efi/efibc.c index 35dccc88ac0a..15a47539dc56 100644 --- a/drivers/firmware/efi/efibc.c +++ b/drivers/firmware/efi/efibc.c @@ -84,7 +84,7 @@ static int __init efibc_init(void) { int ret; - if (!efi_enabled(EFI_RUNTIME_SERVICES)) + if (!efivars_kobject() || !efivar_supports_writes()) return -ENODEV; ret = register_reboot_notifier(&efibc_reboot_notifier); diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c index dcea137142b3..e6b16b3a17a8 100644 --- a/drivers/firmware/efi/efivars.c +++ b/drivers/firmware/efi/efivars.c @@ -22,10 +22,8 @@ MODULE_AUTHOR("Matt Domsch <Matt_Domsch@Dell.com>"); MODULE_DESCRIPTION("sysfs interface to EFI Variables"); MODULE_LICENSE("GPL"); MODULE_VERSION(EFIVARS_VERSION); -MODULE_ALIAS("platform:efivars"); -LIST_HEAD(efivar_sysfs_list); -EXPORT_SYMBOL_GPL(efivar_sysfs_list); +static LIST_HEAD(efivar_sysfs_list); static struct kset *efivars_kset; @@ -591,42 +589,6 @@ out_free: return error; } -static int efivar_update_sysfs_entry(efi_char16_t *name, efi_guid_t vendor, - unsigned long name_size, void *data) -{ - struct efivar_entry *entry = data; - - if (efivar_entry_find(name, vendor, &efivar_sysfs_list, false)) - return 0; - - memcpy(entry->var.VariableName, name, name_size); - memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t)); - - return 1; -} - -static void efivar_update_sysfs_entries(struct work_struct *work) -{ - struct efivar_entry *entry; - int err; - - /* Add new sysfs entries */ - while (1) { - entry = kzalloc(sizeof(*entry), GFP_KERNEL); - if (!entry) - return; - - err = efivar_init(efivar_update_sysfs_entry, entry, - false, &efivar_sysfs_list); - if (!err) - break; - - efivar_create_sysfs_entry(entry); - } - - kfree(entry); -} - static int efivars_sysfs_callback(efi_char16_t *name, efi_guid_t vendor, unsigned long name_size, void *data) { @@ -675,7 +637,7 @@ static void efivars_sysfs_exit(void) kset_unregister(efivars_kset); } -int efivars_sysfs_init(void) +static int efivars_sysfs_init(void) { struct kobject *parent_kobj = efivars_kobject(); int error = 0; @@ -701,11 +663,8 @@ int efivars_sysfs_init(void) return error; } - INIT_WORK(&efivar_work, efivar_update_sysfs_entries); - return 0; } -EXPORT_SYMBOL_GPL(efivars_sysfs_init); module_init(efivars_sysfs_init); module_exit(efivars_sysfs_exit); diff --git a/drivers/firmware/efi/embedded-firmware.c b/drivers/firmware/efi/embedded-firmware.c index e97a9c9d010c..21ae0c48232a 100644 --- a/drivers/firmware/efi/embedded-firmware.c +++ b/drivers/firmware/efi/embedded-firmware.c @@ -16,9 +16,9 @@ /* Exported for use by lib/test_firmware.c only */ LIST_HEAD(efi_embedded_fw_list); -EXPORT_SYMBOL_GPL(efi_embedded_fw_list); - -static bool checked_for_fw; +EXPORT_SYMBOL_NS_GPL(efi_embedded_fw_list, TEST_FIRMWARE); +bool efi_embedded_fw_checked; +EXPORT_SYMBOL_NS_GPL(efi_embedded_fw_checked, TEST_FIRMWARE); static const struct dmi_system_id * const embedded_fw_table[] = { #ifdef CONFIG_TOUCHSCREEN_DMI @@ -116,14 +116,14 @@ void __init efi_check_for_embedded_firmwares(void) } } - checked_for_fw = true; + efi_embedded_fw_checked = true; } int efi_get_embedded_fw(const char *name, const u8 **data, size_t *size) { struct efi_embedded_fw *iter, *fw = NULL; - if (!checked_for_fw) { + if (!efi_embedded_fw_checked) { pr_warn("Warning %s called while we did not check for embedded fw\n", __func__); return -ENOENT; diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 296b18fbd7a2..8a94388e38b3 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -18,15 +18,18 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \ # arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly # disable the stackleak plugin cflags-$(CONFIG_ARM64) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \ - -fpie $(DISABLE_STACKLEAK_PLUGIN) + -fpie $(DISABLE_STACKLEAK_PLUGIN) \ + $(call cc-option,-mbranch-protection=none) cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \ -fno-builtin -fpic \ $(call cc-option,-mno-single-pic-base) +cflags-$(CONFIG_RISCV) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \ + -fpic cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \ - -include $(srctree)/drivers/firmware/efi/libstub/hidden.h \ + -include $(srctree)/include/linux/hidden.h \ -D__NO_FORTIFY \ -ffreestanding \ -fno-stack-protector \ @@ -63,8 +66,14 @@ lib-$(CONFIG_EFI_GENERIC_STUB) += efi-stub.o fdt.o string.o \ lib-$(CONFIG_ARM) += arm32-stub.o lib-$(CONFIG_ARM64) += arm64-stub.o lib-$(CONFIG_X86) += x86-stub.o +lib-$(CONFIG_RISCV) += riscv-stub.o CFLAGS_arm32-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) -CFLAGS_arm64-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) + +# Even when -mbranch-protection=none is set, Clang will generate a +# .note.gnu.property for code-less object files (like lib/ctype.c), +# so work around this by explicitly removing the unwanted section. +# https://bugs.llvm.org/show_bug.cgi?id=46480 +STUBCOPY_FLAGS-y += --remove-section=.note.gnu.property # # For x86, bootloaders like systemd-boot or grub-efi do not zero-initialize the @@ -106,6 +115,13 @@ STUBCOPY_FLAGS-$(CONFIG_ARM64) += --prefix-alloc-sections=.init \ --prefix-symbols=__efistub_ STUBCOPY_RELOC-$(CONFIG_ARM64) := R_AARCH64_ABS +# For RISC-V, we don't need anything special other than arm64. Keep all the +# symbols in .init section and make sure that no absolute symbols references +# doesn't exist. +STUBCOPY_FLAGS-$(CONFIG_RISCV) += --prefix-alloc-sections=.init \ + --prefix-symbols=__efistub_ +STUBCOPY_RELOC-$(CONFIG_RISCV) := R_RISCV_HI20 + $(obj)/%.stub.o: $(obj)/%.o FORCE $(call if_changed,stubcopy) diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c index d08e5d55838c..4b5b2403b3a0 100644 --- a/drivers/firmware/efi/libstub/arm32-stub.c +++ b/drivers/firmware/efi/libstub/arm32-stub.c @@ -113,162 +113,58 @@ void free_screen_info(struct screen_info *si) efi_bs_call(free_pool, si); } -static efi_status_t reserve_kernel_base(unsigned long dram_base, - unsigned long *reserve_addr, - unsigned long *reserve_size) -{ - efi_physical_addr_t alloc_addr; - efi_memory_desc_t *memory_map; - unsigned long nr_pages, map_size, desc_size, buff_size; - efi_status_t status; - unsigned long l; - - struct efi_boot_memmap map = { - .map = &memory_map, - .map_size = &map_size, - .desc_size = &desc_size, - .desc_ver = NULL, - .key_ptr = NULL, - .buff_size = &buff_size, - }; - - /* - * Reserve memory for the uncompressed kernel image. This is - * all that prevents any future allocations from conflicting - * with the kernel. Since we can't tell from the compressed - * image how much DRAM the kernel actually uses (due to BSS - * size uncertainty) we allocate the maximum possible size. - * Do this very early, as prints can cause memory allocations - * that may conflict with this. - */ - alloc_addr = dram_base + MAX_UNCOMP_KERNEL_SIZE; - nr_pages = MAX_UNCOMP_KERNEL_SIZE / EFI_PAGE_SIZE; - status = efi_bs_call(allocate_pages, EFI_ALLOCATE_MAX_ADDRESS, - EFI_BOOT_SERVICES_DATA, nr_pages, &alloc_addr); - if (status == EFI_SUCCESS) { - if (alloc_addr == dram_base) { - *reserve_addr = alloc_addr; - *reserve_size = MAX_UNCOMP_KERNEL_SIZE; - return EFI_SUCCESS; - } - /* - * If we end up here, the allocation succeeded but starts below - * dram_base. This can only occur if the real base of DRAM is - * not a multiple of 128 MB, in which case dram_base will have - * been rounded up. Since this implies that a part of the region - * was already occupied, we need to fall through to the code - * below to ensure that the existing allocations don't conflict. - * For this reason, we use EFI_BOOT_SERVICES_DATA above and not - * EFI_LOADER_DATA, which we wouldn't able to distinguish from - * allocations that we want to disallow. - */ - } - - /* - * If the allocation above failed, we may still be able to proceed: - * if the only allocations in the region are of types that will be - * released to the OS after ExitBootServices(), the decompressor can - * safely overwrite them. - */ - status = efi_get_memory_map(&map); - if (status != EFI_SUCCESS) { - efi_err("reserve_kernel_base(): Unable to retrieve memory map.\n"); - return status; - } - - for (l = 0; l < map_size; l += desc_size) { - efi_memory_desc_t *desc; - u64 start, end; - - desc = (void *)memory_map + l; - start = desc->phys_addr; - end = start + desc->num_pages * EFI_PAGE_SIZE; - - /* Skip if entry does not intersect with region */ - if (start >= dram_base + MAX_UNCOMP_KERNEL_SIZE || - end <= dram_base) - continue; - - switch (desc->type) { - case EFI_BOOT_SERVICES_CODE: - case EFI_BOOT_SERVICES_DATA: - /* Ignore types that are released to the OS anyway */ - continue; - - case EFI_CONVENTIONAL_MEMORY: - /* Skip soft reserved conventional memory */ - if (efi_soft_reserve_enabled() && - (desc->attribute & EFI_MEMORY_SP)) - continue; - - /* - * Reserve the intersection between this entry and the - * region. - */ - start = max(start, (u64)dram_base); - end = min(end, (u64)dram_base + MAX_UNCOMP_KERNEL_SIZE); - - status = efi_bs_call(allocate_pages, - EFI_ALLOCATE_ADDRESS, - EFI_LOADER_DATA, - (end - start) / EFI_PAGE_SIZE, - &start); - if (status != EFI_SUCCESS) { - efi_err("reserve_kernel_base(): alloc failed.\n"); - goto out; - } - break; - - case EFI_LOADER_CODE: - case EFI_LOADER_DATA: - /* - * These regions may be released and reallocated for - * another purpose (including EFI_RUNTIME_SERVICE_DATA) - * at any time during the execution of the OS loader, - * so we cannot consider them as safe. - */ - default: - /* - * Treat any other allocation in the region as unsafe */ - status = EFI_OUT_OF_RESOURCES; - goto out; - } - } - - status = EFI_SUCCESS; -out: - efi_bs_call(free_pool, memory_map); - return status; -} - efi_status_t handle_kernel_image(unsigned long *image_addr, unsigned long *image_size, unsigned long *reserve_addr, unsigned long *reserve_size, - unsigned long dram_base, efi_loaded_image_t *image) { - unsigned long kernel_base; + const int slack = TEXT_OFFSET - 5 * PAGE_SIZE; + int alloc_size = MAX_UNCOMP_KERNEL_SIZE + EFI_PHYS_ALIGN; + unsigned long alloc_base, kernel_base; efi_status_t status; - /* use a 16 MiB aligned base for the decompressed kernel */ - kernel_base = round_up(dram_base, SZ_16M) + TEXT_OFFSET; - /* - * Note that some platforms (notably, the Raspberry Pi 2) put - * spin-tables and other pieces of firmware at the base of RAM, - * abusing the fact that the window of TEXT_OFFSET bytes at the - * base of the kernel image is only partially used at the moment. - * (Up to 5 pages are used for the swapper page tables) + * Allocate space for the decompressed kernel as low as possible. + * The region should be 16 MiB aligned, but the first 'slack' bytes + * are not used by Linux, so we allow those to be occupied by the + * firmware. */ - status = reserve_kernel_base(kernel_base - 5 * PAGE_SIZE, reserve_addr, - reserve_size); + status = efi_low_alloc_above(alloc_size, EFI_PAGE_SIZE, &alloc_base, 0x0); if (status != EFI_SUCCESS) { efi_err("Unable to allocate memory for uncompressed kernel.\n"); return status; } - *image_addr = kernel_base; + if ((alloc_base % EFI_PHYS_ALIGN) > slack) { + /* + * More than 'slack' bytes are already occupied at the base of + * the allocation, so we need to advance to the next 16 MiB block. + */ + kernel_base = round_up(alloc_base, EFI_PHYS_ALIGN); + efi_info("Free memory starts at 0x%lx, setting kernel_base to 0x%lx\n", + alloc_base, kernel_base); + } else { + kernel_base = round_down(alloc_base, EFI_PHYS_ALIGN); + } + + *reserve_addr = kernel_base + slack; + *reserve_size = MAX_UNCOMP_KERNEL_SIZE; + + /* now free the parts that we will not use */ + if (*reserve_addr > alloc_base) { + efi_bs_call(free_pages, alloc_base, + (*reserve_addr - alloc_base) / EFI_PAGE_SIZE); + alloc_size -= *reserve_addr - alloc_base; + } + efi_bs_call(free_pages, *reserve_addr + MAX_UNCOMP_KERNEL_SIZE, + (alloc_size - MAX_UNCOMP_KERNEL_SIZE) / EFI_PAGE_SIZE); + + *image_addr = kernel_base + TEXT_OFFSET; *image_size = 0; + + efi_debug("image addr == 0x%lx, reserve_addr == 0x%lx\n", + *image_addr, *reserve_addr); + return EFI_SUCCESS; } diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c index e5bfac79e5ac..22ece1ad68a8 100644 --- a/drivers/firmware/efi/libstub/arm64-stub.c +++ b/drivers/firmware/efi/libstub/arm64-stub.c @@ -50,7 +50,6 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, unsigned long *image_size, unsigned long *reserve_addr, unsigned long *reserve_size, - unsigned long dram_base, efi_loaded_image_t *image) { efi_status_t status; @@ -62,10 +61,12 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, status = efi_get_random_bytes(sizeof(phys_seed), (u8 *)&phys_seed); if (status == EFI_NOT_FOUND) { - efi_info("EFI_RNG_PROTOCOL unavailable, no randomness supplied\n"); + efi_info("EFI_RNG_PROTOCOL unavailable, KASLR will be disabled\n"); + efi_nokaslr = true; } else if (status != EFI_SUCCESS) { - efi_err("efi_get_random_bytes() failed\n"); - return status; + efi_err("efi_get_random_bytes() failed (0x%lx), KASLR will be disabled\n", + status); + efi_nokaslr = true; } } else { efi_info("KASLR disabled on kernel command line\n"); @@ -77,7 +78,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, kernel_size = _edata - _text; kernel_memsize = kernel_size + (_end - _edata); - *reserve_size = kernel_memsize + TEXT_OFFSET % min_kimg_align(); + *reserve_size = kernel_memsize; if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && phys_seed != 0) { /* @@ -91,7 +92,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, } if (status != EFI_SUCCESS) { - if (IS_ALIGNED((u64)_text - TEXT_OFFSET, min_kimg_align())) { + if (IS_ALIGNED((u64)_text, min_kimg_align())) { /* * Just execute from wherever we were loaded by the * UEFI PE/COFF loader if the alignment is suitable. @@ -111,7 +112,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, } } - *image_addr = *reserve_addr + TEXT_OFFSET % min_kimg_align(); + *image_addr = *reserve_addr; memcpy((void *)*image_addr, _text, kernel_size); return EFI_SUCCESS; diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c index 6bca70bbb43d..aa8da0a49829 100644 --- a/drivers/firmware/efi/libstub/efi-stub-helper.c +++ b/drivers/firmware/efi/libstub/efi-stub-helper.c @@ -187,20 +187,28 @@ int efi_printk(const char *fmt, ...) */ efi_status_t efi_parse_options(char const *cmdline) { - size_t len = strlen(cmdline) + 1; + size_t len; efi_status_t status; char *str, *buf; + if (!cmdline) + return EFI_SUCCESS; + + len = strnlen(cmdline, COMMAND_LINE_SIZE - 1) + 1; status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, len, (void **)&buf); if (status != EFI_SUCCESS) return status; - str = skip_spaces(memcpy(buf, cmdline, len)); + memcpy(buf, cmdline, len - 1); + buf[len - 1] = '\0'; + str = skip_spaces(buf); while (*str) { char *param, *val; str = next_arg(str, ¶m, &val); + if (!val && !strcmp(param, "--")) + break; if (!strcmp(param, "nokaslr")) { efi_nokaslr = true; @@ -231,6 +239,102 @@ efi_status_t efi_parse_options(char const *cmdline) } /* + * The EFI_LOAD_OPTION descriptor has the following layout: + * u32 Attributes; + * u16 FilePathListLength; + * u16 Description[]; + * efi_device_path_protocol_t FilePathList[]; + * u8 OptionalData[]; + * + * This function validates and unpacks the variable-size data fields. + */ +static +bool efi_load_option_unpack(efi_load_option_unpacked_t *dest, + const efi_load_option_t *src, size_t size) +{ + const void *pos; + u16 c; + efi_device_path_protocol_t header; + const efi_char16_t *description; + const efi_device_path_protocol_t *file_path_list; + + if (size < offsetof(efi_load_option_t, variable_data)) + return false; + pos = src->variable_data; + size -= offsetof(efi_load_option_t, variable_data); + + if ((src->attributes & ~EFI_LOAD_OPTION_MASK) != 0) + return false; + + /* Scan description. */ + description = pos; + do { + if (size < sizeof(c)) + return false; + c = *(const u16 *)pos; + pos += sizeof(c); + size -= sizeof(c); + } while (c != L'\0'); + + /* Scan file_path_list. */ + file_path_list = pos; + do { + if (size < sizeof(header)) + return false; + header = *(const efi_device_path_protocol_t *)pos; + if (header.length < sizeof(header)) + return false; + if (size < header.length) + return false; + pos += header.length; + size -= header.length; + } while ((header.type != EFI_DEV_END_PATH && header.type != EFI_DEV_END_PATH2) || + (header.sub_type != EFI_DEV_END_ENTIRE)); + if (pos != (const void *)file_path_list + src->file_path_list_length) + return false; + + dest->attributes = src->attributes; + dest->file_path_list_length = src->file_path_list_length; + dest->description = description; + dest->file_path_list = file_path_list; + dest->optional_data_size = size; + dest->optional_data = size ? pos : NULL; + + return true; +} + +/* + * At least some versions of Dell firmware pass the entire contents of the + * Boot#### variable, i.e. the EFI_LOAD_OPTION descriptor, rather than just the + * OptionalData field. + * + * Detect this case and extract OptionalData. + */ +void efi_apply_loadoptions_quirk(const void **load_options, int *load_options_size) +{ + const efi_load_option_t *load_option = *load_options; + efi_load_option_unpacked_t load_option_unpacked; + + if (!IS_ENABLED(CONFIG_X86)) + return; + if (!load_option) + return; + if (*load_options_size < sizeof(*load_option)) + return; + if ((load_option->attributes & ~EFI_LOAD_OPTION_BOOT_MASK) != 0) + return; + + if (!efi_load_option_unpack(&load_option_unpacked, load_option, *load_options_size)) + return; + + efi_warn_once(FW_BUG "LoadOptions is an EFI_LOAD_OPTION descriptor\n"); + efi_warn_once(FW_BUG "Using OptionalData as a workaround\n"); + + *load_options = load_option_unpacked.optional_data; + *load_options_size = load_option_unpacked.optional_data_size; +} + +/* * Convert the unicode UEFI command line to ASCII to pass to kernel. * Size of memory allocated return in *cmd_line_len. * Returns NULL on error. @@ -239,12 +343,15 @@ char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len) { const u16 *s2; unsigned long cmdline_addr = 0; - int options_chars = efi_table_attr(image, load_options_size) / 2; + int options_chars = efi_table_attr(image, load_options_size); const u16 *options = efi_table_attr(image, load_options); int options_bytes = 0, safe_options_bytes = 0; /* UTF-8 bytes */ bool in_quote = false; efi_status_t status; + efi_apply_loadoptions_quirk((const void **)&options, &options_chars); + options_chars /= sizeof(*options); + if (options) { s2 = options; while (options_bytes < COMMAND_LINE_SIZE && options_chars--) { diff --git a/drivers/firmware/efi/libstub/efi-stub.c b/drivers/firmware/efi/libstub/efi-stub.c index a5a405d8ab44..914a343c7785 100644 --- a/drivers/firmware/efi/libstub/efi-stub.c +++ b/drivers/firmware/efi/libstub/efi-stub.c @@ -17,7 +17,10 @@ /* * This is the base address at which to start allocating virtual memory ranges - * for UEFI Runtime Services. This is in the low TTBR0 range so that we can use + * for UEFI Runtime Services. + * + * For ARM/ARM64: + * This is in the low TTBR0 range so that we can use * any allocation we choose, and eliminate the risk of a conflict after kexec. * The value chosen is the largest non-zero power of 2 suitable for this purpose * both on 32-bit and 64-bit ARM CPUs, to maximize the likelihood that it can @@ -25,6 +28,12 @@ * Since 32-bit ARM could potentially execute with a 1G/3G user/kernel split, * map everything below 1 GB. (512 MB is a reasonable upper bound for the * entire footprint of the UEFI runtime services memory regions) + * + * For RISC-V: + * There is no specific reason for which, this address (512MB) can't be used + * EFI runtime virtual address for RISC-V. It also helps to use EFI runtime + * services on both RV32/RV64. Keep the same runtime virtual address for RISC-V + * as well to minimize the code churn. */ #define EFI_RT_VIRTUAL_BASE SZ_512M #define EFI_RT_VIRTUAL_SIZE SZ_512M @@ -87,40 +96,6 @@ static void install_memreserve_table(void) efi_err("Failed to install memreserve config table!\n"); } -static unsigned long get_dram_base(void) -{ - efi_status_t status; - unsigned long map_size, buff_size; - unsigned long membase = EFI_ERROR; - struct efi_memory_map map; - efi_memory_desc_t *md; - struct efi_boot_memmap boot_map; - - boot_map.map = (efi_memory_desc_t **)&map.map; - boot_map.map_size = &map_size; - boot_map.desc_size = &map.desc_size; - boot_map.desc_ver = NULL; - boot_map.key_ptr = NULL; - boot_map.buff_size = &buff_size; - - status = efi_get_memory_map(&boot_map); - if (status != EFI_SUCCESS) - return membase; - - map.map_end = map.map + map_size; - - for_each_efi_memory_desc_in_map(&map, md) { - if (md->attribute & EFI_MEMORY_WB) { - if (membase > md->phys_addr) - membase = md->phys_addr; - } - } - - efi_bs_call(free_pool, map.map); - - return membase; -} - /* * EFI entry point for the arm/arm64 EFI stubs. This is the entrypoint * that is described in the PE/COFF header. Most of the code is the same @@ -134,7 +109,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, efi_status_t status; unsigned long image_addr; unsigned long image_size = 0; - unsigned long dram_base; /* addr/point and size pairs for memory management*/ unsigned long initrd_addr = 0; unsigned long initrd_size = 0; @@ -174,13 +148,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, goto fail; } - dram_base = get_dram_base(); - if (dram_base == EFI_ERROR) { - efi_err("Failed to find DRAM base\n"); - status = EFI_LOAD_ERROR; - goto fail; - } - /* * Get the command line from EFI, using the LOADED_IMAGE * protocol. We are going to copy the command line into the @@ -218,7 +185,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, status = handle_kernel_image(&image_addr, &image_size, &reserve_addr, &reserve_size, - dram_base, image); + image); if (status != EFI_SUCCESS) { efi_err("Failed to relocate kernel\n"); goto fail_free_screeninfo; @@ -262,7 +229,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, efi_info("Generating empty DTB\n"); if (!efi_noinitrd) { - max_addr = efi_get_max_initrd_addr(dram_base, image_addr); + max_addr = efi_get_max_initrd_addr(image_addr); status = efi_load_initrd(image, &initrd_addr, &initrd_size, ULONG_MAX, max_addr); if (status != EFI_SUCCESS) @@ -306,7 +273,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, install_memreserve_table(); status = allocate_new_fdt_and_exit_boot(handle, &fdt_addr, - efi_get_max_fdt_addr(dram_base), + efi_get_max_fdt_addr(image_addr), initrd_addr, initrd_size, cmdline_ptr, fdt_addr, fdt_size); if (status != EFI_SUCCESS) diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index 85050f5a1b28..2d7abcd99de9 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -10,9 +10,6 @@ #include <linux/types.h> #include <asm/efi.h> -/* error code which can't be mistaken for valid address */ -#define EFI_ERROR (~0UL) - /* * __init annotations should not be used in the EFI stub, since the code is * either included in the decompressor (x86, ARM) where they have no effect, @@ -55,11 +52,34 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, #define efi_info(fmt, ...) \ efi_printk(KERN_INFO fmt, ##__VA_ARGS__) +#define efi_warn(fmt, ...) \ + efi_printk(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__) #define efi_err(fmt, ...) \ efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__) #define efi_debug(fmt, ...) \ efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__) +#define efi_printk_once(fmt, ...) \ +({ \ + static bool __print_once; \ + bool __ret_print_once = !__print_once; \ + \ + if (!__print_once) { \ + __print_once = true; \ + efi_printk(fmt, ##__VA_ARGS__); \ + } \ + __ret_print_once; \ +}) + +#define efi_info_once(fmt, ...) \ + efi_printk_once(KERN_INFO fmt, ##__VA_ARGS__) +#define efi_warn_once(fmt, ...) \ + efi_printk_once(KERN_WARNING "WARNING: " fmt, ##__VA_ARGS__) +#define efi_err_once(fmt, ...) \ + efi_printk_once(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__) +#define efi_debug_once(fmt, ...) \ + efi_printk_once(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__) + /* Helper macros for the usual case of using simple C variables: */ #ifndef fdt_setprop_inplace_var #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ @@ -688,6 +708,35 @@ union efi_load_file_protocol { } mixed_mode; }; +typedef struct { + u32 attributes; + u16 file_path_list_length; + u8 variable_data[]; + // efi_char16_t description[]; + // efi_device_path_protocol_t file_path_list[]; + // u8 optional_data[]; +} __packed efi_load_option_t; + +#define EFI_LOAD_OPTION_ACTIVE 0x0001U +#define EFI_LOAD_OPTION_FORCE_RECONNECT 0x0002U +#define EFI_LOAD_OPTION_HIDDEN 0x0008U +#define EFI_LOAD_OPTION_CATEGORY 0x1f00U +#define EFI_LOAD_OPTION_CATEGORY_BOOT 0x0000U +#define EFI_LOAD_OPTION_CATEGORY_APP 0x0100U + +#define EFI_LOAD_OPTION_BOOT_MASK \ + (EFI_LOAD_OPTION_ACTIVE|EFI_LOAD_OPTION_HIDDEN|EFI_LOAD_OPTION_CATEGORY) +#define EFI_LOAD_OPTION_MASK (EFI_LOAD_OPTION_FORCE_RECONNECT|EFI_LOAD_OPTION_BOOT_MASK) + +typedef struct { + u32 attributes; + u16 file_path_list_length; + const efi_char16_t *description; + const efi_device_path_protocol_t *file_path_list; + size_t optional_data_size; + const void *optional_data; +} efi_load_option_unpacked_t; + void efi_pci_disable_bridge_busmaster(void); typedef efi_status_t (*efi_exit_boot_map_processing)( @@ -730,6 +779,8 @@ __printf(1, 2) int efi_printk(char const *fmt, ...); void efi_free(unsigned long size, unsigned long addr); +void efi_apply_loadoptions_quirk(const void **load_options, int *load_options_size); + char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len); efi_status_t efi_get_memory_map(struct efi_boot_memmap *map); @@ -740,6 +791,9 @@ efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr, efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr, unsigned long max, unsigned long align); +efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, + unsigned long *addr, unsigned long min); + efi_status_t efi_relocate_kernel(unsigned long *image_addr, unsigned long image_size, unsigned long alloc_size, @@ -786,7 +840,6 @@ efi_status_t handle_kernel_image(unsigned long *image_addr, unsigned long *image_size, unsigned long *reserve_addr, unsigned long *reserve_size, - unsigned long dram_base, efi_loaded_image_t *image); asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint, diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c index 11ecf3c4640e..368cd60000ee 100644 --- a/drivers/firmware/efi/libstub/fdt.c +++ b/drivers/firmware/efi/libstub/fdt.c @@ -136,7 +136,7 @@ static efi_status_t update_fdt(void *orig_fdt, unsigned long orig_fdt_size, if (status) goto fdt_set_fail; - if (IS_ENABLED(CONFIG_RANDOMIZE_BASE)) { + if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && !efi_nokaslr) { efi_status_t efi_status; efi_status = efi_get_random_bytes(sizeof(fdt_val64), @@ -145,8 +145,6 @@ static efi_status_t update_fdt(void *orig_fdt, unsigned long orig_fdt_size, status = fdt_setprop_var(fdt, node, "kaslr-seed", fdt_val64); if (status) goto fdt_set_fail; - } else if (efi_status != EFI_NOT_FOUND) { - return efi_status; } } diff --git a/drivers/firmware/efi/libstub/file.c b/drivers/firmware/efi/libstub/file.c index 630caa6b1f4c..4e81c6077188 100644 --- a/drivers/firmware/efi/libstub/file.c +++ b/drivers/firmware/efi/libstub/file.c @@ -136,7 +136,7 @@ efi_status_t handle_cmdline_files(efi_loaded_image_t *image, unsigned long *load_size) { const efi_char16_t *cmdline = image->load_options; - int cmdline_len = image->load_options_size / 2; + int cmdline_len = image->load_options_size; unsigned long efi_chunk_size = ULONG_MAX; efi_file_protocol_t *volume = NULL; efi_file_protocol_t *file; @@ -148,6 +148,9 @@ efi_status_t handle_cmdline_files(efi_loaded_image_t *image, if (!load_addr || !load_size) return EFI_INVALID_PARAMETER; + efi_apply_loadoptions_quirk((const void **)&cmdline, &cmdline_len); + cmdline_len /= sizeof(*cmdline); + if (IS_ENABLED(CONFIG_X86) && !efi_nochunk) efi_chunk_size = EFI_READ_CHUNK_SIZE; diff --git a/drivers/firmware/efi/libstub/hidden.h b/drivers/firmware/efi/libstub/hidden.h deleted file mode 100644 index 3493b041f419..000000000000 --- a/drivers/firmware/efi/libstub/hidden.h +++ /dev/null @@ -1,6 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * To prevent the compiler from emitting GOT-indirected (and thus absolute) - * references to any global symbols, override their visibility as 'hidden' - */ -#pragma GCC visibility push(hidden) diff --git a/drivers/firmware/efi/libstub/relocate.c b/drivers/firmware/efi/libstub/relocate.c index 9b1aaf8b123f..8ee9eb2b9039 100644 --- a/drivers/firmware/efi/libstub/relocate.c +++ b/drivers/firmware/efi/libstub/relocate.c @@ -20,8 +20,8 @@ * * Return: status code */ -static efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, - unsigned long *addr, unsigned long min) +efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align, + unsigned long *addr, unsigned long min) { unsigned long map_size, desc_size, buff_size; efi_memory_desc_t *map; diff --git a/drivers/firmware/efi/libstub/riscv-stub.c b/drivers/firmware/efi/libstub/riscv-stub.c new file mode 100644 index 000000000000..380e4e251399 --- /dev/null +++ b/drivers/firmware/efi/libstub/riscv-stub.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 Western Digital Corporation or its affiliates. + */ + +#include <linux/efi.h> +#include <linux/libfdt.h> + +#include <asm/efi.h> +#include <asm/sections.h> + +#include "efistub.h" + +/* + * RISC-V requires the kernel image to placed 2 MB aligned base for 64 bit and + * 4MB for 32 bit. + */ +#ifdef CONFIG_64BIT +#define MIN_KIMG_ALIGN SZ_2M +#else +#define MIN_KIMG_ALIGN SZ_4M +#endif + +typedef void __noreturn (*jump_kernel_func)(unsigned int, unsigned long); + +static u32 hartid; + +static u32 get_boot_hartid_from_fdt(void) +{ + const void *fdt; + int chosen_node, len; + const fdt32_t *prop; + + fdt = get_efi_config_table(DEVICE_TREE_GUID); + if (!fdt) + return U32_MAX; + + chosen_node = fdt_path_offset(fdt, "/chosen"); + if (chosen_node < 0) + return U32_MAX; + + prop = fdt_getprop((void *)fdt, chosen_node, "boot-hartid", &len); + if (!prop || len != sizeof(u32)) + return U32_MAX; + + return fdt32_to_cpu(*prop); +} + +efi_status_t check_platform_features(void) +{ + hartid = get_boot_hartid_from_fdt(); + if (hartid == U32_MAX) { + efi_err("/chosen/boot-hartid missing or invalid!\n"); + return EFI_UNSUPPORTED; + } + return EFI_SUCCESS; +} + +void __noreturn efi_enter_kernel(unsigned long entrypoint, unsigned long fdt, + unsigned long fdt_size) +{ + unsigned long stext_offset = _start_kernel - _start; + unsigned long kernel_entry = entrypoint + stext_offset; + jump_kernel_func jump_kernel = (jump_kernel_func)kernel_entry; + + /* + * Jump to real kernel here with following constraints. + * 1. MMU should be disabled. + * 2. a0 should contain hartid + * 3. a1 should DT address + */ + csr_write(CSR_SATP, 0); + jump_kernel(hartid, fdt); +} + +efi_status_t handle_kernel_image(unsigned long *image_addr, + unsigned long *image_size, + unsigned long *reserve_addr, + unsigned long *reserve_size, + efi_loaded_image_t *image) +{ + unsigned long kernel_size = 0; + unsigned long preferred_addr; + efi_status_t status; + + kernel_size = _edata - _start; + *image_addr = (unsigned long)_start; + *image_size = kernel_size + (_end - _edata); + + /* + * RISC-V kernel maps PAGE_OFFSET virtual address to the same physical + * address where kernel is booted. That's why kernel should boot from + * as low as possible to avoid wastage of memory. Currently, dram_base + * is occupied by the firmware. So the preferred address for kernel to + * boot is next aligned address. If preferred address is not available, + * relocate_kernel will fall back to efi_low_alloc_above to allocate + * lowest possible memory region as long as the address and size meets + * the alignment constraints. + */ + preferred_addr = MIN_KIMG_ALIGN; + status = efi_relocate_kernel(image_addr, kernel_size, *image_size, + preferred_addr, MIN_KIMG_ALIGN, 0x0); + + if (status != EFI_SUCCESS) { + efi_err("Failed to relocate kernel\n"); + *image_size = 0; + } + return status; +} diff --git a/drivers/firmware/efi/libstub/string.c b/drivers/firmware/efi/libstub/string.c index 1ac2f8764715..5d13e43869ee 100644 --- a/drivers/firmware/efi/libstub/string.c +++ b/drivers/firmware/efi/libstub/string.c @@ -7,6 +7,7 @@ */ #include <linux/ctype.h> +#include <linux/kernel.h> #include <linux/types.h> #include <linux/string.h> diff --git a/drivers/firmware/efi/libstub/vsprintf.c b/drivers/firmware/efi/libstub/vsprintf.c index e65ef49a54cd..1088e288c04d 100644 --- a/drivers/firmware/efi/libstub/vsprintf.c +++ b/drivers/firmware/efi/libstub/vsprintf.c @@ -135,7 +135,7 @@ char *number(char *end, unsigned long long num, int base, char locase) break; default: unreachable(); - }; + } return end; } diff --git a/drivers/firmware/efi/mokvar-table.c b/drivers/firmware/efi/mokvar-table.c new file mode 100644 index 000000000000..d8bc01340686 --- /dev/null +++ b/drivers/firmware/efi/mokvar-table.c @@ -0,0 +1,359 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * mokvar-table.c + * + * Copyright (c) 2020 Red Hat + * Author: Lenny Szubowicz <lszubowi@redhat.com> + * + * This module contains the kernel support for the Linux EFI Machine + * Owner Key (MOK) variable configuration table, which is identified by + * the LINUX_EFI_MOK_VARIABLE_TABLE_GUID. + * + * This EFI configuration table provides a more robust alternative to + * EFI volatile variables by which an EFI boot loader can pass the + * contents of the Machine Owner Key (MOK) certificate stores to the + * kernel during boot. If both the EFI MOK config table and corresponding + * EFI MOK variables are present, the table should be considered as + * more authoritative. + * + * This module includes code that validates and maps the EFI MOK table, + * if it's presence was detected very early in boot. + * + * Kernel interface routines are provided to walk through all the + * entries in the MOK config table or to search for a specific named + * entry. + * + * The contents of the individual named MOK config table entries are + * made available to user space via read-only sysfs binary files under: + * + * /sys/firmware/efi/mok-variables/ + * + */ +#define pr_fmt(fmt) "mokvar: " fmt + +#include <linux/capability.h> +#include <linux/efi.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/kobject.h> +#include <linux/list.h> +#include <linux/slab.h> + +#include <asm/early_ioremap.h> + +/* + * The LINUX_EFI_MOK_VARIABLE_TABLE_GUID config table is a packed + * sequence of struct efi_mokvar_table_entry, one for each named + * MOK variable. The sequence is terminated by an entry with a + * completely NULL name and 0 data size. + * + * efi_mokvar_table_size is set to the computed size of the + * MOK config table by efi_mokvar_table_init(). This will be + * non-zero if and only if the table if present and has been + * validated by efi_mokvar_table_init(). + */ +static size_t efi_mokvar_table_size; + +/* + * efi_mokvar_table_va is the kernel virtual address at which the + * EFI MOK config table has been mapped by efi_mokvar_sysfs_init(). + */ +static struct efi_mokvar_table_entry *efi_mokvar_table_va; + +/* + * Each /sys/firmware/efi/mok-variables/ sysfs file is represented by + * an instance of struct efi_mokvar_sysfs_attr on efi_mokvar_sysfs_list. + * bin_attr.private points to the associated EFI MOK config table entry. + * + * This list is created during boot and then remains unchanged. + * So no synchronization is currently required to walk the list. + */ +struct efi_mokvar_sysfs_attr { + struct bin_attribute bin_attr; + struct list_head node; +}; + +static LIST_HEAD(efi_mokvar_sysfs_list); +static struct kobject *mokvar_kobj; + +/* + * efi_mokvar_table_init() - Early boot validation of EFI MOK config table + * + * If present, validate and compute the size of the EFI MOK variable + * configuration table. This table may be provided by an EFI boot loader + * as an alternative to ordinary EFI variables, due to platform-dependent + * limitations. The memory occupied by this table is marked as reserved. + * + * This routine must be called before efi_free_boot_services() in order + * to guarantee that it can mark the table as reserved. + * + * Implicit inputs: + * efi.mokvar_table: Physical address of EFI MOK variable config table + * or special value that indicates no such table. + * + * Implicit outputs: + * efi_mokvar_table_size: Computed size of EFI MOK variable config table. + * The table is considered present and valid if this + * is non-zero. + */ +void __init efi_mokvar_table_init(void) +{ + efi_memory_desc_t md; + void *va = NULL; + unsigned long cur_offset = 0; + unsigned long offset_limit; + unsigned long map_size = 0; + unsigned long map_size_needed = 0; + unsigned long size; + struct efi_mokvar_table_entry *mokvar_entry; + int err; + + if (!efi_enabled(EFI_MEMMAP)) + return; + + if (efi.mokvar_table == EFI_INVALID_TABLE_ADDR) + return; + /* + * The EFI MOK config table must fit within a single EFI memory + * descriptor range. + */ + err = efi_mem_desc_lookup(efi.mokvar_table, &md); + if (err) { + pr_warn("EFI MOKvar config table is not within the EFI memory map\n"); + return; + } + + offset_limit = efi_mem_desc_end(&md) - efi.mokvar_table; + + /* + * Validate the MOK config table. Since there is no table header + * from which we could get the total size of the MOK config table, + * we compute the total size as we validate each variably sized + * entry, remapping as necessary. + */ + err = -EINVAL; + while (cur_offset + sizeof(*mokvar_entry) <= offset_limit) { + mokvar_entry = va + cur_offset; + map_size_needed = cur_offset + sizeof(*mokvar_entry); + if (map_size_needed > map_size) { + if (va) + early_memunmap(va, map_size); + /* + * Map a little more than the fixed size entry + * header, anticipating some data. It's safe to + * do so as long as we stay within current memory + * descriptor. + */ + map_size = min(map_size_needed + 2*EFI_PAGE_SIZE, + offset_limit); + va = early_memremap(efi.mokvar_table, map_size); + if (!va) { + pr_err("Failed to map EFI MOKvar config table pa=0x%lx, size=%lu.\n", + efi.mokvar_table, map_size); + return; + } + mokvar_entry = va + cur_offset; + } + + /* Check for last sentinel entry */ + if (mokvar_entry->name[0] == '\0') { + if (mokvar_entry->data_size != 0) + break; + err = 0; + break; + } + + /* Sanity check that the name is null terminated */ + size = strnlen(mokvar_entry->name, + sizeof(mokvar_entry->name)); + if (size >= sizeof(mokvar_entry->name)) + break; + + /* Advance to the next entry */ + cur_offset = map_size_needed + mokvar_entry->data_size; + } + + if (va) + early_memunmap(va, map_size); + if (err) { + pr_err("EFI MOKvar config table is not valid\n"); + return; + } + efi_mem_reserve(efi.mokvar_table, map_size_needed); + efi_mokvar_table_size = map_size_needed; +} + +/* + * efi_mokvar_entry_next() - Get next entry in the EFI MOK config table + * + * mokvar_entry: Pointer to current EFI MOK config table entry + * or null. Null indicates get first entry. + * Passed by reference. This is updated to the + * same value as the return value. + * + * Returns: Pointer to next EFI MOK config table entry + * or null, if there are no more entries. + * Same value is returned in the mokvar_entry + * parameter. + * + * This routine depends on the EFI MOK config table being entirely + * mapped with it's starting virtual address in efi_mokvar_table_va. + */ +struct efi_mokvar_table_entry *efi_mokvar_entry_next( + struct efi_mokvar_table_entry **mokvar_entry) +{ + struct efi_mokvar_table_entry *mokvar_cur; + struct efi_mokvar_table_entry *mokvar_next; + size_t size_cur; + + mokvar_cur = *mokvar_entry; + *mokvar_entry = NULL; + + if (efi_mokvar_table_va == NULL) + return NULL; + + if (mokvar_cur == NULL) { + mokvar_next = efi_mokvar_table_va; + } else { + if (mokvar_cur->name[0] == '\0') + return NULL; + size_cur = sizeof(*mokvar_cur) + mokvar_cur->data_size; + mokvar_next = (void *)mokvar_cur + size_cur; + } + + if (mokvar_next->name[0] == '\0') + return NULL; + + *mokvar_entry = mokvar_next; + return mokvar_next; +} + +/* + * efi_mokvar_entry_find() - Find EFI MOK config entry by name + * + * name: Name of the entry to look for. + * + * Returns: Pointer to EFI MOK config table entry if found; + * null otherwise. + * + * This routine depends on the EFI MOK config table being entirely + * mapped with it's starting virtual address in efi_mokvar_table_va. + */ +struct efi_mokvar_table_entry *efi_mokvar_entry_find(const char *name) +{ + struct efi_mokvar_table_entry *mokvar_entry = NULL; + + while (efi_mokvar_entry_next(&mokvar_entry)) { + if (!strncmp(name, mokvar_entry->name, + sizeof(mokvar_entry->name))) + return mokvar_entry; + } + return NULL; +} + +/* + * efi_mokvar_sysfs_read() - sysfs binary file read routine + * + * Returns: Count of bytes read. + * + * Copy EFI MOK config table entry data for this mokvar sysfs binary file + * to the supplied buffer, starting at the specified offset into mokvar table + * entry data, for the specified count bytes. The copy is limited by the + * amount of data in this mokvar config table entry. + */ +static ssize_t efi_mokvar_sysfs_read(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, char *buf, + loff_t off, size_t count) +{ + struct efi_mokvar_table_entry *mokvar_entry = bin_attr->private; + + if (!capable(CAP_SYS_ADMIN)) + return 0; + + if (off >= mokvar_entry->data_size) + return 0; + if (count > mokvar_entry->data_size - off) + count = mokvar_entry->data_size - off; + + memcpy(buf, mokvar_entry->data + off, count); + return count; +} + +/* + * efi_mokvar_sysfs_init() - Map EFI MOK config table and create sysfs + * + * Map the EFI MOK variable config table for run-time use by the kernel + * and create the sysfs entries in /sys/firmware/efi/mok-variables/ + * + * This routine just returns if a valid EFI MOK variable config table + * was not found earlier during boot. + * + * This routine must be called during a "middle" initcall phase, i.e. + * after efi_mokvar_table_init() but before UEFI certs are loaded + * during late init. + * + * Implicit inputs: + * efi.mokvar_table: Physical address of EFI MOK variable config table + * or special value that indicates no such table. + * + * efi_mokvar_table_size: Computed size of EFI MOK variable config table. + * The table is considered present and valid if this + * is non-zero. + * + * Implicit outputs: + * efi_mokvar_table_va: Start virtual address of the EFI MOK config table. + */ +static int __init efi_mokvar_sysfs_init(void) +{ + void *config_va; + struct efi_mokvar_table_entry *mokvar_entry = NULL; + struct efi_mokvar_sysfs_attr *mokvar_sysfs = NULL; + int err = 0; + + if (efi_mokvar_table_size == 0) + return -ENOENT; + + config_va = memremap(efi.mokvar_table, efi_mokvar_table_size, + MEMREMAP_WB); + if (!config_va) { + pr_err("Failed to map EFI MOKvar config table\n"); + return -ENOMEM; + } + efi_mokvar_table_va = config_va; + + mokvar_kobj = kobject_create_and_add("mok-variables", efi_kobj); + if (!mokvar_kobj) { + pr_err("Failed to create EFI mok-variables sysfs entry\n"); + return -ENOMEM; + } + + while (efi_mokvar_entry_next(&mokvar_entry)) { + mokvar_sysfs = kzalloc(sizeof(*mokvar_sysfs), GFP_KERNEL); + if (!mokvar_sysfs) { + err = -ENOMEM; + break; + } + + sysfs_bin_attr_init(&mokvar_sysfs->bin_attr); + mokvar_sysfs->bin_attr.private = mokvar_entry; + mokvar_sysfs->bin_attr.attr.name = mokvar_entry->name; + mokvar_sysfs->bin_attr.attr.mode = 0400; + mokvar_sysfs->bin_attr.size = mokvar_entry->data_size; + mokvar_sysfs->bin_attr.read = efi_mokvar_sysfs_read; + + err = sysfs_create_bin_file(mokvar_kobj, + &mokvar_sysfs->bin_attr); + if (err) + break; + + list_add_tail(&mokvar_sysfs->node, &efi_mokvar_sysfs_list); + } + + if (err) { + pr_err("Failed to create some EFI mok-variables sysfs entries\n"); + kfree(mokvar_sysfs); + } + return err; +} +device_initcall(efi_mokvar_sysfs_init); diff --git a/drivers/firmware/efi/riscv-runtime.c b/drivers/firmware/efi/riscv-runtime.c new file mode 100644 index 000000000000..d28e715d2bcc --- /dev/null +++ b/drivers/firmware/efi/riscv-runtime.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Extensible Firmware Interface + * + * Copyright (C) 2020 Western Digital Corporation or its affiliates. + * + * Based on Extensible Firmware Interface Specification version 2.4 + * Adapted from drivers/firmware/efi/arm-runtime.c + * + */ + +#include <linux/dmi.h> +#include <linux/efi.h> +#include <linux/io.h> +#include <linux/memblock.h> +#include <linux/mm_types.h> +#include <linux/preempt.h> +#include <linux/rbtree.h> +#include <linux/rwsem.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/pgtable.h> + +#include <asm/cacheflush.h> +#include <asm/efi.h> +#include <asm/mmu.h> +#include <asm/pgalloc.h> + +static bool __init efi_virtmap_init(void) +{ + efi_memory_desc_t *md; + + efi_mm.pgd = pgd_alloc(&efi_mm); + mm_init_cpumask(&efi_mm); + init_new_context(NULL, &efi_mm); + + for_each_efi_memory_desc(md) { + phys_addr_t phys = md->phys_addr; + int ret; + + if (!(md->attribute & EFI_MEMORY_RUNTIME)) + continue; + if (md->virt_addr == 0) + return false; + + ret = efi_create_mapping(&efi_mm, md); + if (ret) { + pr_warn(" EFI remap %pa: failed to create mapping (%d)\n", + &phys, ret); + return false; + } + } + + if (efi_memattr_apply_permissions(&efi_mm, efi_set_mapping_permissions)) + return false; + + return true; +} + +/* + * Enable the UEFI Runtime Services if all prerequisites are in place, i.e., + * non-early mapping of the UEFI system table and virtual mappings for all + * EFI_MEMORY_RUNTIME regions. + */ +static int __init riscv_enable_runtime_services(void) +{ + u64 mapsize; + + if (!efi_enabled(EFI_BOOT)) { + pr_info("EFI services will not be available.\n"); + return 0; + } + + efi_memmap_unmap(); + + mapsize = efi.memmap.desc_size * efi.memmap.nr_map; + + if (efi_memmap_init_late(efi.memmap.phys_map, mapsize)) { + pr_err("Failed to remap EFI memory map\n"); + return 0; + } + + if (efi_soft_reserve_enabled()) { + efi_memory_desc_t *md; + + for_each_efi_memory_desc(md) { + int md_size = md->num_pages << EFI_PAGE_SHIFT; + struct resource *res; + + if (!(md->attribute & EFI_MEMORY_SP)) + continue; + + res = kzalloc(sizeof(*res), GFP_KERNEL); + if (WARN_ON(!res)) + break; + + res->start = md->phys_addr; + res->end = md->phys_addr + md_size - 1; + res->name = "Soft Reserved"; + res->flags = IORESOURCE_MEM; + res->desc = IORES_DESC_SOFT_RESERVED; + + insert_resource(&iomem_resource, res); + } + } + + if (efi_runtime_disabled()) { + pr_info("EFI runtime services will be disabled.\n"); + return 0; + } + + if (efi_enabled(EFI_RUNTIME_SERVICES)) { + pr_info("EFI runtime services access via paravirt.\n"); + return 0; + } + + pr_info("Remapping and enabling EFI services.\n"); + + if (!efi_virtmap_init()) { + pr_err("UEFI virtual mapping missing or invalid -- runtime services will not be available\n"); + return -ENOMEM; + } + + /* Set up runtime services function pointers */ + efi_native_runtime_setup(); + set_bit(EFI_RUNTIME_SERVICES, &efi.flags); + + return 0; +} +early_initcall(riscv_enable_runtime_services); + +void efi_virtmap_load(void) +{ + preempt_disable(); + switch_mm(current->active_mm, &efi_mm, NULL); +} + +void efi_virtmap_unload(void) +{ + switch_mm(&efi_mm, current->active_mm, NULL); + preempt_enable(); +} diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c index 973eef234b36..41c1d00bf933 100644 --- a/drivers/firmware/efi/vars.c +++ b/drivers/firmware/efi/vars.c @@ -32,10 +32,6 @@ static struct efivars *__efivars; */ static DEFINE_SEMAPHORE(efivars_lock); -static bool efivar_wq_enabled = true; -DECLARE_WORK(efivar_work, NULL); -EXPORT_SYMBOL_GPL(efivar_work); - static bool validate_device_path(efi_char16_t *var_name, int match, u8 *buffer, unsigned long len) @@ -391,13 +387,6 @@ static void dup_variable_bug(efi_char16_t *str16, efi_guid_t *vendor_guid, size_t i, len8 = len16 / sizeof(efi_char16_t); char *str8; - /* - * Disable the workqueue since the algorithm it uses for - * detecting new variables won't work with this buggy - * implementation of GetNextVariableName(). - */ - efivar_wq_enabled = false; - str8 = kzalloc(len8, GFP_KERNEL); if (!str8) return; @@ -414,7 +403,6 @@ static void dup_variable_bug(efi_char16_t *str16, efi_guid_t *vendor_guid, * efivar_init - build the initial list of EFI variables * @func: callback function to invoke for every variable * @data: function-specific data to pass to @func - * @atomic: do we need to execute the @func-loop atomically? * @duplicates: error if we encounter duplicates on @head? * @head: initialised head of variable list * @@ -1158,16 +1146,6 @@ struct kobject *efivars_kobject(void) EXPORT_SYMBOL_GPL(efivars_kobject); /** - * efivar_run_worker - schedule the efivar worker thread - */ -void efivar_run_worker(void) -{ - if (efivar_wq_enabled) - schedule_work(&efivar_work); -} -EXPORT_SYMBOL_GPL(efivar_run_worker); - -/** * efivars_register - register an efivars * @efivars: efivars to register * @ops: efivars operations diff --git a/drivers/firmware/efi/x86_fake_mem.c b/drivers/firmware/efi/x86_fake_mem.c index e5d6d5a1b240..0bafcc1bb0f6 100644 --- a/drivers/firmware/efi/x86_fake_mem.c +++ b/drivers/firmware/efi/x86_fake_mem.c @@ -38,7 +38,7 @@ void __init efi_fake_memmap_early(void) m_start = mem->range.start; m_end = mem->range.end; for_each_efi_memory_desc(md) { - u64 start, end; + u64 start, end, size; if (md->type != EFI_CONVENTIONAL_MEMORY) continue; @@ -58,11 +58,17 @@ void __init efi_fake_memmap_early(void) */ start = max(start, m_start); end = min(end, m_end); + size = end - start + 1; if (end <= start) continue; - e820__range_update(start, end - start + 1, E820_TYPE_RAM, - E820_TYPE_SOFT_RESERVED); + + /* + * Ensure each efi_fake_mem instance results in + * a unique e820 resource + */ + e820__range_remove(start, size, E820_TYPE_RAM, 1); + e820__range_add(start, size, E820_TYPE_SOFT_RESERVED); e820__update_table(e820_table); } } diff --git a/drivers/firmware/google/Kconfig b/drivers/firmware/google/Kconfig index a3a6ca659ffa..97968aece54f 100644 --- a/drivers/firmware/google/Kconfig +++ b/drivers/firmware/google/Kconfig @@ -15,7 +15,7 @@ config GOOGLE_SMI help Say Y here if you want to enable SMI callbacks for Google platforms. This provides an interface for writing to and - clearing the event log. If EFI_VARS is also enabled this + clearing the event log. If CONFIG_EFI is also enabled this driver provides an interface for reading and writing NVRAM variables. diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c index 5b2011ebbe26..7d9367b22010 100644 --- a/drivers/firmware/google/gsmi.c +++ b/drivers/firmware/google/gsmi.c @@ -302,7 +302,7 @@ static int gsmi_exec(u8 func, u8 sub) return rc; } -#ifdef CONFIG_EFI_VARS +#ifdef CONFIG_EFI static struct efivars efivars; @@ -483,7 +483,7 @@ static const struct efivar_operations efivar_ops = { .get_next_variable = gsmi_get_next_variable, }; -#endif /* CONFIG_EFI_VARS */ +#endif /* CONFIG_EFI */ static ssize_t eventlog_write(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, @@ -1007,7 +1007,7 @@ static __init int gsmi_init(void) goto out_remove_bin_file; } -#ifdef CONFIG_EFI_VARS +#ifdef CONFIG_EFI ret = efivars_register(&efivars, &efivar_ops, gsmi_kobj); if (ret) { printk(KERN_INFO "gsmi: Failed to register efivars\n"); @@ -1047,7 +1047,7 @@ static void __exit gsmi_exit(void) unregister_die_notifier(&gsmi_die_notifier); atomic_notifier_chain_unregister(&panic_notifier_list, &gsmi_panic_notifier); -#ifdef CONFIG_EFI_VARS +#ifdef CONFIG_EFI efivars_unregister(&efivars); #endif diff --git a/drivers/firmware/imx/scu-pd.c b/drivers/firmware/imx/scu-pd.c index af3d6d9ead28..946eea292b52 100644 --- a/drivers/firmware/imx/scu-pd.c +++ b/drivers/firmware/imx/scu-pd.c @@ -46,6 +46,7 @@ #include <dt-bindings/firmware/imx/rsrc.h> #include <linux/firmware/imx/sci.h> +#include <linux/firmware/imx/svc/rm.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> @@ -256,6 +257,9 @@ imx_scu_add_pm_domain(struct device *dev, int idx, struct imx_sc_pm_domain *sc_pd; int ret; + if (!imx_sc_rm_is_resource_owned(pm_ipc_handle, pd_ranges->rsrc + idx)) + return NULL; + sc_pd = devm_kzalloc(dev, sizeof(*sc_pd), GFP_KERNEL); if (!sc_pd) return ERR_PTR(-ENOMEM); diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index 92013ecc2d9e..00af99b6f97c 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -151,12 +151,15 @@ static u32 psci_get_version(void) return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0); } -int psci_set_osi_mode(void) +int psci_set_osi_mode(bool enable) { + unsigned long suspend_mode; int err; - err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, - PSCI_1_0_SUSPEND_MODE_OSI, 0, 0); + suspend_mode = enable ? PSCI_1_0_SUSPEND_MODE_OSI : + PSCI_1_0_SUSPEND_MODE_PC; + + err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, suspend_mode, 0, 0); return psci_to_linux_errno(err); } @@ -546,8 +549,7 @@ static int __init psci_1_0_init(struct device_node *np) pr_info("OSI mode supported.\n"); /* Default to PC mode. */ - invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, - PSCI_1_0_SUSPEND_MODE_PC, 0, 0); + psci_set_osi_mode(false); } return 0; diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index e8bbf2d38ae7..7be48c1bec96 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -756,6 +756,30 @@ int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare) } EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init); +int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size, + u32 cp_nonpixel_start, + u32 cp_nonpixel_size) +{ + int ret; + struct qcom_scm_desc desc = { + .svc = QCOM_SCM_SVC_MP, + .cmd = QCOM_SCM_MP_VIDEO_VAR, + .arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_VAL, QCOM_SCM_VAL, + QCOM_SCM_VAL, QCOM_SCM_VAL), + .args[0] = cp_start, + .args[1] = cp_size, + .args[2] = cp_nonpixel_start, + .args[3] = cp_nonpixel_size, + .owner = ARM_SMCCC_OWNER_SIP, + }; + struct qcom_scm_res res; + + ret = qcom_scm_call(__scm->dev, &desc, &res); + + return ret ? : res.result[0]; +} +EXPORT_SYMBOL(qcom_scm_mem_protect_video_var); + static int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region, size_t mem_sz, phys_addr_t src, size_t src_sz, phys_addr_t dest, size_t dest_sz) diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h index 38ea614d29fe..95cd1ac30ab0 100644 --- a/drivers/firmware/qcom_scm.h +++ b/drivers/firmware/qcom_scm.h @@ -97,6 +97,7 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc, #define QCOM_SCM_MP_RESTORE_SEC_CFG 0x02 #define QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE 0x03 #define QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT 0x04 +#define QCOM_SCM_MP_VIDEO_VAR 0x08 #define QCOM_SCM_MP_ASSIGN 0x16 #define QCOM_SCM_SVC_OCMEM 0x0f diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c index 6945c3c96637..0078260fbabe 100644 --- a/drivers/firmware/qemu_fw_cfg.c +++ b/drivers/firmware/qemu_fw_cfg.c @@ -215,6 +215,9 @@ static void fw_cfg_io_cleanup(void) # define FW_CFG_CTRL_OFF 0x08 # define FW_CFG_DATA_OFF 0x00 # define FW_CFG_DMA_OFF 0x10 +# elif defined(CONFIG_PARISC) /* parisc */ +# define FW_CFG_CTRL_OFF 0x00 +# define FW_CFG_DATA_OFF 0x04 # elif (defined(CONFIG_PPC_PMAC) || defined(CONFIG_SPARC32)) /* ppc/mac,sun4m */ # define FW_CFG_CTRL_OFF 0x00 # define FW_CFG_DATA_OFF 0x02 diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c index 8f2fb4c562da..2371d08bdd17 100644 --- a/drivers/firmware/raspberrypi.c +++ b/drivers/firmware/raspberrypi.c @@ -12,8 +12,6 @@ #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/slab.h> -#include <linux/pci.h> -#include <linux/delay.h> #include <soc/bcm2835/raspberrypi-firmware.h> #define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf)) @@ -21,8 +19,6 @@ #define MBOX_DATA28(msg) ((msg) & ~0xf) #define MBOX_CHAN_PROPERTY 8 -#define VL805_PCI_CONFIG_VERSION_OFFSET 0x50 - static struct platform_device *rpi_hwmon; static struct platform_device *rpi_clk; @@ -301,63 +297,6 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node) } EXPORT_SYMBOL_GPL(rpi_firmware_get); -/* - * The Raspberry Pi 4 gets its USB functionality from VL805, a PCIe chip that - * implements xHCI. After a PCI reset, VL805's firmware may either be loaded - * directly from an EEPROM or, if not present, by the SoC's co-processor, - * VideoCore. RPi4's VideoCore OS contains both the non public firmware load - * logic and the VL805 firmware blob. This function triggers the aforementioned - * process. - */ -int rpi_firmware_init_vl805(struct pci_dev *pdev) -{ - struct device_node *fw_np; - struct rpi_firmware *fw; - u32 dev_addr, version; - int ret; - - fw_np = of_find_compatible_node(NULL, NULL, - "raspberrypi,bcm2835-firmware"); - if (!fw_np) - return 0; - - fw = rpi_firmware_get(fw_np); - of_node_put(fw_np); - if (!fw) - return -ENODEV; - - /* - * Make sure we don't trigger a firmware load unnecessarily. - * - * If something went wrong with PCI, this whole exercise would be - * futile as VideoCore expects from us a configured PCI bus. Just take - * the faulty version (likely ~0) and let xHCI's registration fail - * further down the line. - */ - pci_read_config_dword(pdev, VL805_PCI_CONFIG_VERSION_OFFSET, &version); - if (version) - goto exit; - - dev_addr = pdev->bus->number << 20 | PCI_SLOT(pdev->devfn) << 15 | - PCI_FUNC(pdev->devfn) << 12; - - ret = rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_XHCI_RESET, - &dev_addr, sizeof(dev_addr)); - if (ret) - return ret; - - /* Wait for vl805 to startup */ - usleep_range(200, 1000); - - pci_read_config_dword(pdev, VL805_PCI_CONFIG_VERSION_OFFSET, - &version); -exit: - pci_info(pdev, "VL805 firmware version %08x\n", version); - - return 0; -} -EXPORT_SYMBOL_GPL(rpi_firmware_init_vl805); - static const struct of_device_id rpi_firmware_of_match[] = { { .compatible = "raspberrypi,bcm2835-firmware", }, {}, diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c index 4e80921ee212..00c88b809c0c 100644 --- a/drivers/firmware/smccc/smccc.c +++ b/drivers/firmware/smccc/smccc.c @@ -24,8 +24,10 @@ enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void) return smccc_conduit; } +EXPORT_SYMBOL_GPL(arm_smccc_1_1_get_conduit); u32 arm_smccc_get_version(void) { return smccc_version; } +EXPORT_SYMBOL_GPL(arm_smccc_get_version); diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c index 4d93d8925e14..0742a90cb844 100644 --- a/drivers/firmware/tegra/bpmp.c +++ b/drivers/firmware/tegra/bpmp.c @@ -856,7 +856,8 @@ static const struct tegra_bpmp_soc tegra210_soc = { static const struct of_device_id tegra_bpmp_match[] = { #if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC) || \ - IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) + IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) || \ + IS_ENABLED(CONFIG_ARCH_TEGRA_234_SOC) { .compatible = "nvidia,tegra186-bpmp", .data = &tegra186_soc }, #endif #if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 53cee17d0115..896f53ec7857 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -65,36 +65,18 @@ struct ti_sci_xfers_info { }; /** - * struct ti_sci_rm_type_map - Structure representing TISCI Resource - * management representation of dev_ids. - * @dev_id: TISCI device ID - * @type: Corresponding id as identified by TISCI RM. - * - * Note: This is used only as a work around for using RM range apis - * for AM654 SoC. For future SoCs dev_id will be used as type - * for RM range APIs. In order to maintain ABI backward compatibility - * type is not being changed for AM654 SoC. - */ -struct ti_sci_rm_type_map { - u32 dev_id; - u16 type; -}; - -/** * struct ti_sci_desc - Description of SoC integration * @default_host_id: Host identifier representing the compute entity * @max_rx_timeout_ms: Timeout for communication with SoC (in Milliseconds) * @max_msgs: Maximum number of messages that can be pending * simultaneously in the system * @max_msg_size: Maximum size of data per message that can be handled. - * @rm_type_map: RM resource type mapping structure. */ struct ti_sci_desc { u8 default_host_id; int max_rx_timeout_ms; int max_msgs; int max_msg_size; - struct ti_sci_rm_type_map *rm_type_map; }; /** @@ -1124,7 +1106,8 @@ static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id, static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id) { - return ti_sci_set_clock_state(handle, dev_id, clk_id, 0, + return ti_sci_set_clock_state(handle, dev_id, clk_id, + MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, MSG_CLOCK_SW_STATE_UNREQ); } @@ -1143,7 +1126,8 @@ static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle, static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle, u32 dev_id, u32 clk_id) { - return ti_sci_set_clock_state(handle, dev_id, clk_id, 0, + return ti_sci_set_clock_state(handle, dev_id, clk_id, + MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE, MSG_CLOCK_SW_STATE_AUTO); } @@ -1710,33 +1694,6 @@ fail: return ret; } -static int ti_sci_get_resource_type(struct ti_sci_info *info, u16 dev_id, - u16 *type) -{ - struct ti_sci_rm_type_map *rm_type_map = info->desc->rm_type_map; - bool found = false; - int i; - - /* If map is not provided then assume dev_id is used as type */ - if (!rm_type_map) { - *type = dev_id; - return 0; - } - - for (i = 0; rm_type_map[i].dev_id; i++) { - if (rm_type_map[i].dev_id == dev_id) { - *type = rm_type_map[i].type; - found = true; - break; - } - } - - if (!found) - return -EINVAL; - - return 0; -} - /** * ti_sci_get_resource_range - Helper to get a range of resources assigned * to a host. Resource is uniquely identified by @@ -1760,7 +1717,6 @@ static int ti_sci_get_resource_range(const struct ti_sci_handle *handle, struct ti_sci_xfer *xfer; struct ti_sci_info *info; struct device *dev; - u16 type; int ret = 0; if (IS_ERR(handle)) @@ -1780,15 +1736,9 @@ static int ti_sci_get_resource_range(const struct ti_sci_handle *handle, return ret; } - ret = ti_sci_get_resource_type(info, dev_id, &type); - if (ret) { - dev_err(dev, "rm type lookup failed for %u\n", dev_id); - goto fail; - } - req = (struct ti_sci_msg_req_get_resource_range *)xfer->xfer_buf; req->secondary_host = s_host; - req->type = type & MSG_RM_RESOURCE_TYPE_MASK; + req->type = dev_id & MSG_RM_RESOURCE_TYPE_MASK; req->subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK; ret = ti_sci_do_xfer(info, xfer); @@ -3260,61 +3210,50 @@ u32 ti_sci_get_num_resources(struct ti_sci_resource *res) EXPORT_SYMBOL_GPL(ti_sci_get_num_resources); /** - * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device + * devm_ti_sci_get_resource_sets() - Get a TISCI resources assigned to a device * @handle: TISCI handle * @dev: Device pointer to which the resource is assigned * @dev_id: TISCI device id to which the resource is assigned - * @of_prop: property name by which the resource are represented + * @sub_types: Array of sub_types assigned corresponding to device + * @sets: Number of sub_types * * Return: Pointer to ti_sci_resource if all went well else appropriate * error pointer. */ -struct ti_sci_resource * -devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, - struct device *dev, u32 dev_id, char *of_prop) +static struct ti_sci_resource * +devm_ti_sci_get_resource_sets(const struct ti_sci_handle *handle, + struct device *dev, u32 dev_id, u32 *sub_types, + u32 sets) { struct ti_sci_resource *res; bool valid_set = false; - u32 resource_subtype; int i, ret; res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL); if (!res) return ERR_PTR(-ENOMEM); - ret = of_property_count_elems_of_size(dev_of_node(dev), of_prop, - sizeof(u32)); - if (ret < 0) { - dev_err(dev, "%s resource type ids not available\n", of_prop); - return ERR_PTR(ret); - } - res->sets = ret; - + res->sets = sets; res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc), GFP_KERNEL); if (!res->desc) return ERR_PTR(-ENOMEM); for (i = 0; i < res->sets; i++) { - ret = of_property_read_u32_index(dev_of_node(dev), of_prop, i, - &resource_subtype); - if (ret) - return ERR_PTR(-EINVAL); - ret = handle->ops.rm_core_ops.get_range(handle, dev_id, - resource_subtype, + sub_types[i], &res->desc[i].start, &res->desc[i].num); if (ret) { dev_dbg(dev, "dev = %d subtype %d not allocated for this host\n", - dev_id, resource_subtype); + dev_id, sub_types[i]); res->desc[i].start = 0; res->desc[i].num = 0; continue; } dev_dbg(dev, "dev = %d, subtype = %d, start = %d, num = %d\n", - dev_id, resource_subtype, res->desc[i].start, + dev_id, sub_types[i], res->desc[i].start, res->desc[i].num); valid_set = true; @@ -3332,6 +3271,62 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, return ERR_PTR(-EINVAL); } +/** + * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device + * @handle: TISCI handle + * @dev: Device pointer to which the resource is assigned + * @dev_id: TISCI device id to which the resource is assigned + * @of_prop: property name by which the resource are represented + * + * Return: Pointer to ti_sci_resource if all went well else appropriate + * error pointer. + */ +struct ti_sci_resource * +devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle, + struct device *dev, u32 dev_id, char *of_prop) +{ + struct ti_sci_resource *res; + u32 *sub_types; + int sets; + + sets = of_property_count_elems_of_size(dev_of_node(dev), of_prop, + sizeof(u32)); + if (sets < 0) { + dev_err(dev, "%s resource type ids not available\n", of_prop); + return ERR_PTR(sets); + } + + sub_types = kcalloc(sets, sizeof(*sub_types), GFP_KERNEL); + if (!sub_types) + return ERR_PTR(-ENOMEM); + + of_property_read_u32_array(dev_of_node(dev), of_prop, sub_types, sets); + res = devm_ti_sci_get_resource_sets(handle, dev, dev_id, sub_types, + sets); + + kfree(sub_types); + return res; +} +EXPORT_SYMBOL_GPL(devm_ti_sci_get_of_resource); + +/** + * devm_ti_sci_get_resource() - Get a resource range assigned to the device + * @handle: TISCI handle + * @dev: Device pointer to which the resource is assigned + * @dev_id: TISCI device id to which the resource is assigned + * @suub_type: TISCI resource subytpe representing the resource. + * + * Return: Pointer to ti_sci_resource if all went well else appropriate + * error pointer. + */ +struct ti_sci_resource * +devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev, + u32 dev_id, u32 sub_type) +{ + return devm_ti_sci_get_resource_sets(handle, dev, dev_id, &sub_type, 1); +} +EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource); + static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode, void *cmd) { @@ -3352,17 +3347,6 @@ static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = { /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ .max_msgs = 20, .max_msg_size = 64, - .rm_type_map = NULL, -}; - -static struct ti_sci_rm_type_map ti_sci_am654_rm_type_map[] = { - {.dev_id = 56, .type = 0x00b}, /* GIC_IRQ */ - {.dev_id = 179, .type = 0x000}, /* MAIN_NAV_UDMASS_IA0 */ - {.dev_id = 187, .type = 0x009}, /* MAIN_NAV_RA */ - {.dev_id = 188, .type = 0x006}, /* MAIN_NAV_UDMAP */ - {.dev_id = 194, .type = 0x007}, /* MCU_NAV_UDMAP */ - {.dev_id = 195, .type = 0x00a}, /* MCU_NAV_RA */ - {.dev_id = 0, .type = 0x000}, /* end of table */ }; /* Description for AM654 */ @@ -3373,7 +3357,6 @@ static const struct ti_sci_desc ti_sci_pmmc_am654_desc = { /* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */ .max_msgs = 20, .max_msg_size = 60, - .rm_type_map = ti_sci_am654_rm_type_map, }; static const struct of_device_id ti_sci_of_match[] = { |