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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-03-04 11:16:35 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-03-04 11:16:35 +0100
commitdcaed592b2fc9ca7e8df2a2e6f4887dba4561415 (patch)
tree0d9231fa1622fbff7e9b3c50d9be6eaa8529a32d /drivers/acpi
parent511514f1d955d732dbcb5b421499a60b09dd0832 (diff)
parent45b14a4ffcc1e0b5caa246638f942cbe7eaea7ad (diff)
Merge branch 'acpi-apei'
* acpi-apei: (29 commits) efi: cper: Fix possible out-of-bounds access ACPI: APEI: Fix possible out-of-bounds access to BERT region MAINTAINERS: Add James Morse to the list of APEI reviewers ACPI / APEI: Add support for the SDEI GHES Notification type firmware: arm_sdei: Add ACPI GHES registration helper ACPI / APEI: Use separate fixmap pages for arm64 NMI-like notifications ACPI / APEI: Only use queued estatus entry during in_nmi_queue_one_entry() ACPI / APEI: Split ghes_read_estatus() to allow a peek at the CPER length ACPI / APEI: Make GHES estatus header validation more user friendly ACPI / APEI: Pass ghes and estatus separately to avoid a later copy ACPI / APEI: Let the notification helper specify the fixmap slot ACPI / APEI: Move locking to the notification helper arm64: KVM/mm: Move SEA handling behind a single 'claim' interface KVM: arm/arm64: Add kvm_ras.h to collect kvm specific RAS plumbing ACPI / APEI: Switch NOTIFY_SEA to use the estatus queue ACPI / APEI: Move NOTIFY_SEA between the estatus-queue and NOTIFY_NMI ACPI / APEI: Don't allow ghes_ack_error() to mask earlier errors ACPI / APEI: Generalise the estatus queue's notify code ACPI / APEI: Don't update struct ghes' flags in read/clear estatus ACPI / APEI: Remove spurious GHES_TO_CLEAR check ...
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/apei/Kconfig12
-rw-r--r--drivers/acpi/apei/bert.c23
-rw-r--r--drivers/acpi/apei/einj.c15
-rw-r--r--drivers/acpi/apei/erst.c27
-rw-r--r--drivers/acpi/apei/ghes.c655
-rw-r--r--drivers/acpi/apei/hest.c16
6 files changed, 416 insertions, 332 deletions
diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
index 52ae5438edeb..6b18f8bc7be3 100644
--- a/drivers/acpi/apei/Kconfig
+++ b/drivers/acpi/apei/Kconfig
@@ -41,19 +41,9 @@ config ACPI_APEI_PCIEAER
Turn on this option to enable the corresponding support.
config ACPI_APEI_SEA
- bool "APEI Synchronous External Abort logging/recovering support"
+ bool
depends on ARM64 && ACPI_APEI_GHES
default y
- help
- This option should be enabled if the system supports
- firmware first handling of SEA (Synchronous External Abort).
- SEA happens with certain faults of data abort or instruction
- abort synchronous exceptions on ARMv8 systems. If a system
- supports firmware first handling of SEA, the platform analyzes
- and handles hardware error notifications from SEA, and it may then
- form a HW error record for the OS to parse and handle. This
- option allows the OS to look for such hardware error record, and
- take appropriate action.
config ACPI_APEI_MEMORY_FAILURE
bool "APEI memory error recovering support"
diff --git a/drivers/acpi/apei/bert.c b/drivers/acpi/apei/bert.c
index 12771fcf0417..0d948d0a41af 100644
--- a/drivers/acpi/apei/bert.c
+++ b/drivers/acpi/apei/bert.c
@@ -42,15 +42,7 @@ static void __init bert_print_all(struct acpi_bert_region *region,
int remain = region_len;
u32 estatus_len;
- if (!estatus->block_status)
- return;
-
- while (remain > sizeof(struct acpi_bert_region)) {
- if (cper_estatus_check(estatus)) {
- pr_err(FW_BUG "Invalid error record.\n");
- return;
- }
-
+ while (remain >= sizeof(struct acpi_bert_region)) {
estatus_len = cper_estatus_len(estatus);
if (remain < estatus_len) {
pr_err(FW_BUG "Truncated status block (length: %u).\n",
@@ -58,6 +50,15 @@ static void __init bert_print_all(struct acpi_bert_region *region,
return;
}
+ /* No more error records. */
+ if (!estatus->block_status)
+ return;
+
+ if (cper_estatus_check(estatus)) {
+ pr_err(FW_BUG "Invalid error record.\n");
+ return;
+ }
+
pr_info_once("Error records from previous boot:\n");
cper_estatus_print(KERN_INFO HW_ERR, estatus);
@@ -70,10 +71,6 @@ static void __init bert_print_all(struct acpi_bert_region *region,
estatus->block_status = 0;
estatus = (void *)estatus + estatus_len;
- /* No more error records. */
- if (!estatus->block_status)
- return;
-
remain -= estatus_len;
}
}
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index c42299e048e4..2d4be94f8c00 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -644,8 +644,8 @@ static int error_type_set(void *data, u64 val)
return 0;
}
-DEFINE_SIMPLE_ATTRIBUTE(error_type_fops, error_type_get,
- error_type_set, "0x%llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(error_type_fops, error_type_get, error_type_set,
+ "0x%llx\n");
static int error_inject_set(void *data, u64 val)
{
@@ -656,8 +656,7 @@ static int error_inject_set(void *data, u64 val)
error_param3, error_param4);
}
-DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL,
- error_inject_set, "%llu\n");
+DEFINE_DEBUGFS_ATTRIBUTE(error_inject_fops, NULL, error_inject_set, "%llu\n");
static int einj_check_table(struct acpi_table_einj *einj_tab)
{
@@ -709,10 +708,10 @@ static int __init einj_init(void)
debugfs_create_file("available_error_type", S_IRUSR, einj_debug_dir,
NULL, &available_error_type_fops);
- debugfs_create_file("error_type", S_IRUSR | S_IWUSR, einj_debug_dir,
- NULL, &error_type_fops);
- debugfs_create_file("error_inject", S_IWUSR, einj_debug_dir,
- NULL, &error_inject_fops);
+ debugfs_create_file_unsafe("error_type", 0600, einj_debug_dir,
+ NULL, &error_type_fops);
+ debugfs_create_file_unsafe("error_inject", 0200, einj_debug_dir,
+ NULL, &error_inject_fops);
apei_resources_init(&einj_resources);
einj_exec_ctx_init(&ctx);
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 9953e50667ec..389d88e35ffb 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -938,17 +938,17 @@ static struct pstore_info erst_info = {
};
#define CPER_CREATOR_PSTORE \
- UUID_LE(0x75a574e3, 0x5052, 0x4b29, 0x8a, 0x8e, 0xbe, 0x2c, \
- 0x64, 0x90, 0xb8, 0x9d)
+ GUID_INIT(0x75a574e3, 0x5052, 0x4b29, 0x8a, 0x8e, 0xbe, 0x2c, \
+ 0x64, 0x90, 0xb8, 0x9d)
#define CPER_SECTION_TYPE_DMESG \
- UUID_LE(0xc197e04e, 0xd545, 0x4a70, 0x9c, 0x17, 0xa5, 0x54, \
- 0x94, 0x19, 0xeb, 0x12)
+ GUID_INIT(0xc197e04e, 0xd545, 0x4a70, 0x9c, 0x17, 0xa5, 0x54, \
+ 0x94, 0x19, 0xeb, 0x12)
#define CPER_SECTION_TYPE_DMESG_Z \
- UUID_LE(0x4f118707, 0x04dd, 0x4055, 0xb5, 0xdd, 0x95, 0x6d, \
- 0x34, 0xdd, 0xfa, 0xc6)
+ GUID_INIT(0x4f118707, 0x04dd, 0x4055, 0xb5, 0xdd, 0x95, 0x6d, \
+ 0x34, 0xdd, 0xfa, 0xc6)
#define CPER_SECTION_TYPE_MCE \
- UUID_LE(0xfe08ffbe, 0x95e4, 0x4be7, 0xbc, 0x73, 0x40, 0x96, \
- 0x04, 0x4a, 0x38, 0xfc)
+ GUID_INIT(0xfe08ffbe, 0x95e4, 0x4be7, 0xbc, 0x73, 0x40, 0x96, \
+ 0x04, 0x4a, 0x38, 0xfc)
struct cper_pstore_record {
struct cper_record_header hdr;
@@ -1012,7 +1012,7 @@ skip:
rc = -EIO;
goto out;
}
- if (uuid_le_cmp(rcd->hdr.creator_id, CPER_CREATOR_PSTORE) != 0)
+ if (!guid_equal(&rcd->hdr.creator_id, &CPER_CREATOR_PSTORE))
goto skip;
record->buf = kmalloc(len, GFP_KERNEL);
@@ -1024,15 +1024,12 @@ skip:
record->id = record_id;
record->compressed = false;
record->ecc_notice_size = 0;
- if (uuid_le_cmp(rcd->sec_hdr.section_type,
- CPER_SECTION_TYPE_DMESG_Z) == 0) {
+ if (guid_equal(&rcd->sec_hdr.section_type, &CPER_SECTION_TYPE_DMESG_Z)) {
record->type = PSTORE_TYPE_DMESG;
record->compressed = true;
- } else if (uuid_le_cmp(rcd->sec_hdr.section_type,
- CPER_SECTION_TYPE_DMESG) == 0)
+ } else if (guid_equal(&rcd->sec_hdr.section_type, &CPER_SECTION_TYPE_DMESG))
record->type = PSTORE_TYPE_DMESG;
- else if (uuid_le_cmp(rcd->sec_hdr.section_type,
- CPER_SECTION_TYPE_MCE) == 0)
+ else if (guid_equal(&rcd->sec_hdr.section_type, &CPER_SECTION_TYPE_MCE))
record->type = PSTORE_TYPE_MCE;
else
record->type = PSTORE_TYPE_MAX;
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index f008ba7c9ced..0b5ae91fd0fb 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -25,6 +25,7 @@
* GNU General Public License for more details.
*/
+#include <linux/arm_sdei.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
@@ -33,7 +34,6 @@
#include <linux/interrupt.h>
#include <linux/timer.h>
#include <linux/cper.h>
-#include <linux/kdebug.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/ratelimit.h>
@@ -42,6 +42,7 @@
#include <linux/llist.h>
#include <linux/genalloc.h>
#include <linux/pci.h>
+#include <linux/pfn.h>
#include <linux/aer.h>
#include <linux/nmi.h>
#include <linux/sched/clock.h>
@@ -85,6 +86,15 @@
((struct acpi_hest_generic_status *) \
((struct ghes_estatus_node *)(estatus_node) + 1))
+/*
+ * NMI-like notifications vary by architecture, before the compiler can prune
+ * unused static functions it needs a value for these enums.
+ */
+#ifndef CONFIG_ARM_SDE_INTERFACE
+#define FIX_APEI_GHES_SDEI_NORMAL __end_of_fixed_addresses
+#define FIX_APEI_GHES_SDEI_CRITICAL __end_of_fixed_addresses
+#endif
+
static inline bool is_hest_type_generic_v2(struct ghes *ghes)
{
return ghes->generic->header.type == ACPI_HEST_TYPE_GENERIC_ERROR_V2;
@@ -115,11 +125,10 @@ static DEFINE_MUTEX(ghes_list_mutex);
* handler, but general ioremap can not be used in atomic context, so
* the fixmap is used instead.
*
- * These 2 spinlocks are used to prevent the fixmap entries from being used
+ * This spinlock is used to prevent the fixmap entry from being used
* simultaneously.
*/
-static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi);
-static DEFINE_SPINLOCK(ghes_ioremap_lock_irq);
+static DEFINE_SPINLOCK(ghes_notify_lock_irq);
static struct gen_pool *ghes_estatus_pool;
static unsigned long ghes_estatus_pool_size_request;
@@ -129,82 +138,49 @@ static atomic_t ghes_estatus_cache_alloced;
static int ghes_panic_timeout __read_mostly = 30;
-static void __iomem *ghes_ioremap_pfn_nmi(u64 pfn)
+static void __iomem *ghes_map(u64 pfn, enum fixed_addresses fixmap_idx)
{
phys_addr_t paddr;
pgprot_t prot;
- paddr = pfn << PAGE_SHIFT;
+ paddr = PFN_PHYS(pfn);
prot = arch_apei_get_mem_attribute(paddr);
- __set_fixmap(FIX_APEI_GHES_NMI, paddr, prot);
+ __set_fixmap(fixmap_idx, paddr, prot);
- return (void __iomem *) fix_to_virt(FIX_APEI_GHES_NMI);
+ return (void __iomem *) __fix_to_virt(fixmap_idx);
}
-static void __iomem *ghes_ioremap_pfn_irq(u64 pfn)
+static void ghes_unmap(void __iomem *vaddr, enum fixed_addresses fixmap_idx)
{
- phys_addr_t paddr;
- pgprot_t prot;
-
- paddr = pfn << PAGE_SHIFT;
- prot = arch_apei_get_mem_attribute(paddr);
- __set_fixmap(FIX_APEI_GHES_IRQ, paddr, prot);
-
- return (void __iomem *) fix_to_virt(FIX_APEI_GHES_IRQ);
-}
+ int _idx = virt_to_fix((unsigned long)vaddr);
-static void ghes_iounmap_nmi(void)
-{
- clear_fixmap(FIX_APEI_GHES_NMI);
+ WARN_ON_ONCE(fixmap_idx != _idx);
+ clear_fixmap(fixmap_idx);
}
-static void ghes_iounmap_irq(void)
+int ghes_estatus_pool_init(int num_ghes)
{
- clear_fixmap(FIX_APEI_GHES_IRQ);
-}
+ unsigned long addr, len;
-static int ghes_estatus_pool_init(void)
-{
ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1);
if (!ghes_estatus_pool)
return -ENOMEM;
- return 0;
-}
-static void ghes_estatus_pool_free_chunk_page(struct gen_pool *pool,
- struct gen_pool_chunk *chunk,
- void *data)
-{
- free_page(chunk->start_addr);
-}
-
-static void ghes_estatus_pool_exit(void)
-{
- gen_pool_for_each_chunk(ghes_estatus_pool,
- ghes_estatus_pool_free_chunk_page, NULL);
- gen_pool_destroy(ghes_estatus_pool);
-}
+ len = GHES_ESTATUS_CACHE_AVG_SIZE * GHES_ESTATUS_CACHE_ALLOCED_MAX;
+ len += (num_ghes * GHES_ESOURCE_PREALLOC_MAX_SIZE);
-static int ghes_estatus_pool_expand(unsigned long len)
-{
- unsigned long i, pages, size, addr;
- int ret;
+ ghes_estatus_pool_size_request = PAGE_ALIGN(len);
+ addr = (unsigned long)vmalloc(PAGE_ALIGN(len));
+ if (!addr)
+ return -ENOMEM;
- ghes_estatus_pool_size_request += PAGE_ALIGN(len);
- size = gen_pool_size(ghes_estatus_pool);
- if (size >= ghes_estatus_pool_size_request)
- return 0;
- pages = (ghes_estatus_pool_size_request - size) / PAGE_SIZE;
- for (i = 0; i < pages; i++) {
- addr = __get_free_page(GFP_KERNEL);
- if (!addr)
- return -ENOMEM;
- ret = gen_pool_add(ghes_estatus_pool, addr, PAGE_SIZE, -1);
- if (ret)
- return ret;
- }
+ /*
+ * New allocation must be visible in all pgd before it can be found by
+ * an NMI allocating from the pool.
+ */
+ vmalloc_sync_all();
- return 0;
+ return gen_pool_add(ghes_estatus_pool, addr, PAGE_ALIGN(len), -1);
}
static int map_gen_v2(struct ghes *ghes)
@@ -217,6 +193,21 @@ static void unmap_gen_v2(struct ghes *ghes)
apei_unmap_generic_address(&ghes->generic_v2->read_ack_register);
}
+static void ghes_ack_error(struct acpi_hest_generic_v2 *gv2)
+{
+ int rc;
+ u64 val = 0;
+
+ rc = apei_read(&val, &gv2->read_ack_register);
+ if (rc)
+ return;
+
+ val &= gv2->read_ack_preserve << gv2->read_ack_register.bit_offset;
+ val |= gv2->read_ack_write << gv2->read_ack_register.bit_offset;
+
+ apei_write(val, &gv2->read_ack_register);
+}
+
static struct ghes *ghes_new(struct acpi_hest_generic *generic)
{
struct ghes *ghes;
@@ -289,23 +280,16 @@ static inline int ghes_severity(int severity)
}
static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
- int from_phys)
+ int from_phys,
+ enum fixed_addresses fixmap_idx)
{
void __iomem *vaddr;
- unsigned long flags = 0;
- int in_nmi = in_nmi();
u64 offset;
u32 trunk;
while (len > 0) {
offset = paddr - (paddr & PAGE_MASK);
- if (in_nmi) {
- raw_spin_lock(&ghes_ioremap_lock_nmi);
- vaddr = ghes_ioremap_pfn_nmi(paddr >> PAGE_SHIFT);
- } else {
- spin_lock_irqsave(&ghes_ioremap_lock_irq, flags);
- vaddr = ghes_ioremap_pfn_irq(paddr >> PAGE_SHIFT);
- }
+ vaddr = ghes_map(PHYS_PFN(paddr), fixmap_idx);
trunk = PAGE_SIZE - offset;
trunk = min(trunk, len);
if (from_phys)
@@ -315,72 +299,114 @@ static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
len -= trunk;
paddr += trunk;
buffer += trunk;
- if (in_nmi) {
- ghes_iounmap_nmi();
- raw_spin_unlock(&ghes_ioremap_lock_nmi);
- } else {
- ghes_iounmap_irq();
- spin_unlock_irqrestore(&ghes_ioremap_lock_irq, flags);
- }
+ ghes_unmap(vaddr, fixmap_idx);
+ }
+}
+
+/* Check the top-level record header has an appropriate size. */
+static int __ghes_check_estatus(struct ghes *ghes,
+ struct acpi_hest_generic_status *estatus)
+{
+ u32 len = cper_estatus_len(estatus);
+
+ if (len < sizeof(*estatus)) {
+ pr_warn_ratelimited(FW_WARN GHES_PFX "Truncated error status block!\n");
+ return -EIO;
+ }
+
+ if (len > ghes->generic->error_block_length) {
+ pr_warn_ratelimited(FW_WARN GHES_PFX "Invalid error status block length!\n");
+ return -EIO;
+ }
+
+ if (cper_estatus_check_header(estatus)) {
+ pr_warn_ratelimited(FW_WARN GHES_PFX "Invalid CPER header!\n");
+ return -EIO;
}
+
+ return 0;
}
-static int ghes_read_estatus(struct ghes *ghes, int silent)
+/* Read the CPER block, returning its address, and header in estatus. */
+static int __ghes_peek_estatus(struct ghes *ghes,
+ struct acpi_hest_generic_status *estatus,
+ u64 *buf_paddr, enum fixed_addresses fixmap_idx)
{
struct acpi_hest_generic *g = ghes->generic;
- u64 buf_paddr;
- u32 len;
int rc;
- rc = apei_read(&buf_paddr, &g->error_status_address);
+ rc = apei_read(buf_paddr, &g->error_status_address);
if (rc) {
- if (!silent && printk_ratelimit())
- pr_warning(FW_WARN GHES_PFX
+ *buf_paddr = 0;
+ pr_warn_ratelimited(FW_WARN GHES_PFX
"Failed to read error status block address for hardware error source: %d.\n",
g->header.source_id);
return -EIO;
}
- if (!buf_paddr)
+ if (!*buf_paddr)
return -ENOENT;
- ghes_copy_tofrom_phys(ghes->estatus, buf_paddr,
- sizeof(*ghes->estatus), 1);
- if (!ghes->estatus->block_status)
+ ghes_copy_tofrom_phys(estatus, *buf_paddr, sizeof(*estatus), 1,
+ fixmap_idx);
+ if (!estatus->block_status) {
+ *buf_paddr = 0;
return -ENOENT;
+ }
- ghes->buffer_paddr = buf_paddr;
- ghes->flags |= GHES_TO_CLEAR;
+ return __ghes_check_estatus(ghes, estatus);
+}
- rc = -EIO;
- len = cper_estatus_len(ghes->estatus);
- if (len < sizeof(*ghes->estatus))
- goto err_read_block;
- if (len > ghes->generic->error_block_length)
- goto err_read_block;
- if (cper_estatus_check_header(ghes->estatus))
- goto err_read_block;
- ghes_copy_tofrom_phys(ghes->estatus + 1,
- buf_paddr + sizeof(*ghes->estatus),
- len - sizeof(*ghes->estatus), 1);
- if (cper_estatus_check(ghes->estatus))
- goto err_read_block;
- rc = 0;
-
-err_read_block:
- if (rc && !silent && printk_ratelimit())
- pr_warning(FW_WARN GHES_PFX
- "Failed to read error status block!\n");
- return rc;
+static int __ghes_read_estatus(struct acpi_hest_generic_status *estatus,
+ u64 buf_paddr, enum fixed_addresses fixmap_idx,
+ size_t buf_len)
+{
+ ghes_copy_tofrom_phys(estatus, buf_paddr, buf_len, 1, fixmap_idx);
+ if (cper_estatus_check(estatus)) {
+ pr_warn_ratelimited(FW_WARN GHES_PFX
+ "Failed to read error status block!\n");
+ return -EIO;
+ }
+
+ return 0;
}
-static void ghes_clear_estatus(struct ghes *ghes)
+static int ghes_read_estatus(struct ghes *ghes,
+ struct acpi_hest_generic_status *estatus,
+ u64 *buf_paddr, enum fixed_addresses fixmap_idx)
{
- ghes->estatus->block_status = 0;
- if (!(ghes->flags & GHES_TO_CLEAR))
+ int rc;
+
+ rc = __ghes_peek_estatus(ghes, estatus, buf_paddr, fixmap_idx);
+ if (rc)
+ return rc;
+
+ rc = __ghes_check_estatus(ghes, estatus);
+ if (rc)
+ return rc;
+
+ return __ghes_read_estatus(estatus, *buf_paddr, fixmap_idx,
+ cper_estatus_len(estatus));
+}
+
+static void ghes_clear_estatus(struct ghes *ghes,
+ struct acpi_hest_generic_status *estatus,
+ u64 buf_paddr, enum fixed_addresses fixmap_idx)
+{
+ estatus->block_status = 0;
+
+ if (!buf_paddr)
return;
- ghes_copy_tofrom_phys(ghes->estatus, ghes->buffer_paddr,
- sizeof(ghes->estatus->block_status), 0);
- ghes->flags &= ~GHES_TO_CLEAR;
+
+ ghes_copy_tofrom_phys(estatus, buf_paddr,
+ sizeof(estatus->block_status), 0,
+ fixmap_idx);
+
+ /*
+ * GHESv2 type HEST entries introduce support for error acknowledgment,
+ * so only acknowledge the error if this support is present.
+ */
+ if (is_hest_type_generic_v2(ghes))
+ ghes_ack_error(ghes->generic_v2);
}
static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int sev)
@@ -672,26 +698,13 @@ static void ghes_estatus_cache_add(
rcu_read_unlock();
}
-static int ghes_ack_error(struct acpi_hest_generic_v2 *gv2)
+static void __ghes_panic(struct ghes *ghes,
+ struct acpi_hest_generic_status *estatus,
+ u64 buf_paddr, enum fixed_addresses fixmap_idx)
{
- int rc;
- u64 val = 0;
+ __ghes_print_estatus(KERN_EMERG, ghes->generic, estatus);
- rc = apei_read(&val, &gv2->read_ack_register);
- if (rc)
- return rc;
-
- val &= gv2->read_ack_preserve << gv2->read_ack_register.bit_offset;
- val |= gv2->read_ack_write << gv2->read_ack_register.bit_offset;
-
- return apei_write(val, &gv2->read_ack_register);
-}
-
-static void __ghes_panic(struct ghes *ghes)
-{
- __ghes_print_estatus(KERN_EMERG, ghes->generic, ghes->estatus);
-
- ghes_clear_estatus(ghes);
+ ghes_clear_estatus(ghes, estatus, buf_paddr, fixmap_idx);
/* reboot to log the error! */
if (!panic_timeout)
@@ -701,34 +714,25 @@ static void __ghes_panic(struct ghes *ghes)
static int ghes_proc(struct ghes *ghes)
{
+ struct acpi_hest_generic_status *estatus = ghes->estatus;
+ u64 buf_paddr;
int rc;
- rc = ghes_read_estatus(ghes, 0);
+ rc = ghes_read_estatus(ghes, estatus, &buf_paddr, FIX_APEI_GHES_IRQ);
if (rc)
goto out;
- if (ghes_severity(ghes->estatus->error_severity) >= GHES_SEV_PANIC) {
- __ghes_panic(ghes);
- }
+ if (ghes_severity(estatus->error_severity) >= GHES_SEV_PANIC)
+ __ghes_panic(ghes, estatus, buf_paddr, FIX_APEI_GHES_IRQ);
- if (!ghes_estatus_cached(ghes->estatus)) {
- if (ghes_print_estatus(NULL, ghes->generic, ghes->estatus))
- ghes_estatus_cache_add(ghes->generic, ghes->estatus);
+ if (!ghes_estatus_cached(estatus)) {
+ if (ghes_print_estatus(NULL, ghes->generic, estatus))
+ ghes_estatus_cache_add(ghes->generic, estatus);
}
- ghes_do_proc(ghes, ghes->estatus);
+ ghes_do_proc(ghes, estatus);
out:
- ghes_clear_estatus(ghes);
-
- if (rc == -ENOENT)
- return rc;
-
- /*
- * GHESv2 type HEST entries introduce support for error acknowledgment,
- * so only acknowledge the error if this support is present.
- */
- if (is_hest_type_generic_v2(ghes))
- return ghes_ack_error(ghes->generic_v2);
+ ghes_clear_estatus(ghes, estatus, buf_paddr, FIX_APEI_GHES_IRQ);
return rc;
}
@@ -751,8 +755,11 @@ static void ghes_add_timer(struct ghes *ghes)
static void ghes_poll_func(struct timer_list *t)
{
struct ghes *ghes = from_timer(ghes, t, timer);
+ unsigned long flags;
+ spin_lock_irqsave(&ghes_notify_lock_irq, flags);
ghes_proc(ghes);
+ spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
if (!(ghes->flags & GHES_EXITING))
ghes_add_timer(ghes);
}
@@ -760,9 +767,12 @@ static void ghes_poll_func(struct timer_list *t)
static irqreturn_t ghes_irq_func(int irq, void *data)
{
struct ghes *ghes = data;
+ unsigned long flags;
int rc;
+ spin_lock_irqsave(&ghes_notify_lock_irq, flags);
rc = ghes_proc(ghes);
+ spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
if (rc)
return IRQ_NONE;
@@ -773,14 +783,17 @@ static int ghes_notify_hed(struct notifier_block *this, unsigned long event,
void *data)
{
struct ghes *ghes;
+ unsigned long flags;
int ret = NOTIFY_DONE;
+ spin_lock_irqsave(&ghes_notify_lock_irq, flags);
rcu_read_lock();
list_for_each_entry_rcu(ghes, &ghes_hed, list) {
if (!ghes_proc(ghes))
ret = NOTIFY_OK;
}
rcu_read_unlock();
+ spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
return ret;
}
@@ -789,66 +802,20 @@ static struct notifier_block ghes_notifier_hed = {
.notifier_call = ghes_notify_hed,
};
-#ifdef CONFIG_ACPI_APEI_SEA
-static LIST_HEAD(ghes_sea);
-
-/*
- * Return 0 only if one of the SEA error sources successfully reported an error
- * record sent from the firmware.
- */
-int ghes_notify_sea(void)
-{
- struct ghes *ghes;
- int ret = -ENOENT;
-
- rcu_read_lock();
- list_for_each_entry_rcu(ghes, &ghes_sea, list) {
- if (!ghes_proc(ghes))
- ret = 0;
- }
- rcu_read_unlock();
- return ret;
-}
-
-static void ghes_sea_add(struct ghes *ghes)
-{
- mutex_lock(&ghes_list_mutex);
- list_add_rcu(&ghes->list, &ghes_sea);
- mutex_unlock(&ghes_list_mutex);
-}
-
-static void ghes_sea_remove(struct ghes *ghes)
-{
- mutex_lock(&ghes_list_mutex);
- list_del_rcu(&ghes->list);
- mutex_unlock(&ghes_list_mutex);
- synchronize_rcu();
-}
-#else /* CONFIG_ACPI_APEI_SEA */
-static inline void ghes_sea_add(struct ghes *ghes) { }
-static inline void ghes_sea_remove(struct ghes *ghes) { }
-#endif /* CONFIG_ACPI_APEI_SEA */
-
-#ifdef CONFIG_HAVE_ACPI_APEI_NMI
/*
- * printk is not safe in NMI context. So in NMI handler, we allocate
- * required memory from lock-less memory allocator
- * (ghes_estatus_pool), save estatus into it, put them into lock-less
- * list (ghes_estatus_llist), then delay printk into IRQ context via
- * irq_work (ghes_proc_irq_work). ghes_estatus_size_request record
- * required pool size by all NMI error source.
+ * Handlers for CPER records may not be NMI safe. For example,
+ * memory_failure_queue() takes spinlocks and calls schedule_work_on().
+ * In any NMI-like handler, memory from ghes_estatus_pool is used to save
+ * estatus, and added to the ghes_estatus_llist. irq_work_queue() causes
+ * ghes_proc_in_irq() to run in IRQ context where each estatus in
+ * ghes_estatus_llist is processed.
+ *
+ * Memory from the ghes_estatus_pool is also used with the ghes_estatus_cache
+ * to suppress frequent messages.
*/
static struct llist_head ghes_estatus_llist;
static struct irq_work ghes_proc_irq_work;
-/*
- * NMI may be triggered on any CPU, so ghes_in_nmi is used for
- * having only one concurrent reader.
- */
-static atomic_t ghes_in_nmi = ATOMIC_INIT(0);
-
-static LIST_HEAD(ghes_nmi);
-
static void ghes_proc_in_irq(struct irq_work *irq_work)
{
struct llist_node *llnode, *next;
@@ -905,96 +872,154 @@ static void ghes_print_queued_estatus(void)
}
}
-/* Save estatus for further processing in IRQ context */
-static void __process_error(struct ghes *ghes)
+static int ghes_in_nmi_queue_one_entry(struct ghes *ghes,
+ enum fixed_addresses fixmap_idx)
{
-#ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
- u32 len, node_len;
+ struct acpi_hest_generic_status *estatus, tmp_header;
struct ghes_estatus_node *estatus_node;
- struct acpi_hest_generic_status *estatus;
+ u32 len, node_len;
+ u64 buf_paddr;
+ int sev, rc;
- if (ghes_estatus_cached(ghes->estatus))
- return;
+ if (!IS_ENABLED(CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG))
+ return -EOPNOTSUPP;
- len = cper_estatus_len(ghes->estatus);
- node_len = GHES_ESTATUS_NODE_LEN(len);
+ rc = __ghes_peek_estatus(ghes, &tmp_header, &buf_paddr, fixmap_idx);
+ if (rc) {
+ ghes_clear_estatus(ghes, &tmp_header, buf_paddr, fixmap_idx);
+ return rc;
+ }
+ rc = __ghes_check_estatus(ghes, &tmp_header);
+ if (rc) {
+ ghes_clear_estatus(ghes, &tmp_header, buf_paddr, fixmap_idx);
+ return rc;
+ }
+
+ len = cper_estatus_len(&tmp_header);
+ node_len = GHES_ESTATUS_NODE_LEN(len);
estatus_node = (void *)gen_pool_alloc(ghes_estatus_pool, node_len);
if (!estatus_node)
- return;
+ return -ENOMEM;
estatus_node->ghes = ghes;
estatus_node->generic = ghes->generic;
estatus = GHES_ESTATUS_FROM_NODE(estatus_node);
- memcpy(estatus, ghes->estatus, len);
- llist_add(&estatus_node->llnode, &ghes_estatus_llist);
-#endif
-}
-static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
-{
- struct ghes *ghes;
- int sev, ret = NMI_DONE;
+ if (__ghes_read_estatus(estatus, buf_paddr, fixmap_idx, len)) {
+ ghes_clear_estatus(ghes, estatus, buf_paddr, fixmap_idx);
+ rc = -ENOENT;
+ goto no_work;
+ }
- if (!atomic_add_unless(&ghes_in_nmi, 1, 1))
- return ret;
+ sev = ghes_severity(estatus->error_severity);
+ if (sev >= GHES_SEV_PANIC) {
+ ghes_print_queued_estatus();
+ __ghes_panic(ghes, estatus, buf_paddr, fixmap_idx);
+ }
- list_for_each_entry_rcu(ghes, &ghes_nmi, list) {
- if (ghes_read_estatus(ghes, 1)) {
- ghes_clear_estatus(ghes);
- continue;
- } else {
- ret = NMI_HANDLED;
- }
+ ghes_clear_estatus(ghes, &tmp_header, buf_paddr, fixmap_idx);
- sev = ghes_severity(ghes->estatus->error_severity);
- if (sev >= GHES_SEV_PANIC) {
- oops_begin();
- ghes_print_queued_estatus();
- __ghes_panic(ghes);
- }
+ /* This error has been reported before, don't process it again. */
+ if (ghes_estatus_cached(estatus))
+ goto no_work;
- if (!(ghes->flags & GHES_TO_CLEAR))
- continue;
+ llist_add(&estatus_node->llnode, &ghes_estatus_llist);
+
+ return rc;
+
+no_work:
+ gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node,
+ node_len);
+
+ return rc;
+}
- __process_error(ghes);
- ghes_clear_estatus(ghes);
+static int ghes_in_nmi_spool_from_list(struct list_head *rcu_list,
+ enum fixed_addresses fixmap_idx)
+{
+ int ret = -ENOENT;
+ struct ghes *ghes;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ghes, rcu_list, list) {
+ if (!ghes_in_nmi_queue_one_entry(ghes, fixmap_idx))
+ ret = 0;
}
+ rcu_read_unlock();
-#ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
- if (ret == NMI_HANDLED)
+ if (IS_ENABLED(CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG) && !ret)
irq_work_queue(&ghes_proc_irq_work);
-#endif
- atomic_dec(&ghes_in_nmi);
+
return ret;
}
-static unsigned long ghes_esource_prealloc_size(
- const struct acpi_hest_generic *generic)
+#ifdef CONFIG_ACPI_APEI_SEA
+static LIST_HEAD(ghes_sea);
+
+/*
+ * Return 0 only if one of the SEA error sources successfully reported an error
+ * record sent from the firmware.
+ */
+int ghes_notify_sea(void)
{
- unsigned long block_length, prealloc_records, prealloc_size;
+ static DEFINE_RAW_SPINLOCK(ghes_notify_lock_sea);
+ int rv;
- block_length = min_t(unsigned long, generic->error_block_length,
- GHES_ESTATUS_MAX_SIZE);
- prealloc_records = max_t(unsigned long,
- generic->records_to_preallocate, 1);
- prealloc_size = min_t(unsigned long, block_length * prealloc_records,
- GHES_ESOURCE_PREALLOC_MAX_SIZE);
+ raw_spin_lock(&ghes_notify_lock_sea);
+ rv = ghes_in_nmi_spool_from_list(&ghes_sea, FIX_APEI_GHES_SEA);
+ raw_spin_unlock(&ghes_notify_lock_sea);
- return prealloc_size;
+ return rv;
}
-static void ghes_estatus_pool_shrink(unsigned long len)
+static void ghes_sea_add(struct ghes *ghes)
{
- ghes_estatus_pool_size_request -= PAGE_ALIGN(len);
+ mutex_lock(&ghes_list_mutex);
+ list_add_rcu(&ghes->list, &ghes_sea);
+ mutex_unlock(&ghes_list_mutex);
}
-static void ghes_nmi_add(struct ghes *ghes)
+static void ghes_sea_remove(struct ghes *ghes)
{
- unsigned long len;
+ mutex_lock(&ghes_list_mutex);
+ list_del_rcu(&ghes->list);
+ mutex_unlock(&ghes_list_mutex);
+ synchronize_rcu();
+}
+#else /* CONFIG_ACPI_APEI_SEA */
+static inline void ghes_sea_add(struct ghes *ghes) { }
+static inline void ghes_sea_remove(struct ghes *ghes) { }
+#endif /* CONFIG_ACPI_APEI_SEA */
+
+#ifdef CONFIG_HAVE_ACPI_APEI_NMI
+/*
+ * NMI may be triggered on any CPU, so ghes_in_nmi is used for
+ * having only one concurrent reader.
+ */
+static atomic_t ghes_in_nmi = ATOMIC_INIT(0);
+
+static LIST_HEAD(ghes_nmi);
+
+static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs)
+{
+ static DEFINE_RAW_SPINLOCK(ghes_notify_lock_nmi);
+ int ret = NMI_DONE;
+
+ if (!atomic_add_unless(&ghes_in_nmi, 1, 1))
+ return ret;
+
+ raw_spin_lock(&ghes_notify_lock_nmi);
+ if (!ghes_in_nmi_spool_from_list(&ghes_nmi, FIX_APEI_GHES_NMI))
+ ret = NMI_HANDLED;
+ raw_spin_unlock(&ghes_notify_lock_nmi);
- len = ghes_esource_prealloc_size(ghes->generic);
- ghes_estatus_pool_expand(len);
+ atomic_dec(&ghes_in_nmi);
+ return ret;
+}
+
+static void ghes_nmi_add(struct ghes *ghes)
+{
mutex_lock(&ghes_list_mutex);
if (list_empty(&ghes_nmi))
register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0, "ghes");
@@ -1004,8 +1029,6 @@ static void ghes_nmi_add(struct ghes *ghes)
static void ghes_nmi_remove(struct ghes *ghes)
{
- unsigned long len;
-
mutex_lock(&ghes_list_mutex);
list_del_rcu(&ghes->list);
if (list_empty(&ghes_nmi))
@@ -1016,24 +1039,79 @@ static void ghes_nmi_remove(struct ghes *ghes)
* freed after NMI handler finishes.
*/
synchronize_rcu();
- len = ghes_esource_prealloc_size(ghes->generic);
- ghes_estatus_pool_shrink(len);
}
+#else /* CONFIG_HAVE_ACPI_APEI_NMI */
+static inline void ghes_nmi_add(struct ghes *ghes) { }
+static inline void ghes_nmi_remove(struct ghes *ghes) { }
+#endif /* CONFIG_HAVE_ACPI_APEI_NMI */
static void ghes_nmi_init_cxt(void)
{
init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq);
}
-#else /* CONFIG_HAVE_ACPI_APEI_NMI */
-static inline void ghes_nmi_add(struct ghes *ghes) { }
-static inline void ghes_nmi_remove(struct ghes *ghes) { }
-static inline void ghes_nmi_init_cxt(void) { }
-#endif /* CONFIG_HAVE_ACPI_APEI_NMI */
+
+static int __ghes_sdei_callback(struct ghes *ghes,
+ enum fixed_addresses fixmap_idx)
+{
+ if (!ghes_in_nmi_queue_one_entry(ghes, fixmap_idx)) {
+ irq_work_queue(&ghes_proc_irq_work);
+
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static int ghes_sdei_normal_callback(u32 event_num, struct pt_regs *regs,
+ void *arg)
+{
+ static DEFINE_RAW_SPINLOCK(ghes_notify_lock_sdei_normal);
+ struct ghes *ghes = arg;
+ int err;
+
+ raw_spin_lock(&ghes_notify_lock_sdei_normal);
+ err = __ghes_sdei_callback(ghes, FIX_APEI_GHES_SDEI_NORMAL);
+ raw_spin_unlock(&ghes_notify_lock_sdei_normal);
+
+ return err;
+}
+
+static int ghes_sdei_critical_callback(u32 event_num, struct pt_regs *regs,
+ void *arg)
+{
+ static DEFINE_RAW_SPINLOCK(ghes_notify_lock_sdei_critical);
+ struct ghes *ghes = arg;
+ int err;
+
+ raw_spin_lock(&ghes_notify_lock_sdei_critical);
+ err = __ghes_sdei_callback(ghes, FIX_APEI_GHES_SDEI_CRITICAL);
+ raw_spin_unlock(&ghes_notify_lock_sdei_critical);
+
+ return err;
+}
+
+static int apei_sdei_register_ghes(struct ghes *ghes)
+{
+ if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
+ return -EOPNOTSUPP;
+
+ return sdei_register_ghes(ghes, ghes_sdei_normal_callback,
+ ghes_sdei_critical_callback);
+}
+
+static int apei_sdei_unregister_ghes(struct ghes *ghes)
+{
+ if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE))
+ return -EOPNOTSUPP;
+
+ return sdei_unregister_ghes(ghes);
+}
static int ghes_probe(struct platform_device *ghes_dev)
{
struct acpi_hest_generic *generic;
struct ghes *ghes = NULL;
+ unsigned long flags;
int rc = -EINVAL;
@@ -1064,6 +1142,13 @@ static int ghes_probe(struct platform_device *ghes_dev)
goto err;
}
break;
+ case ACPI_HEST_NOTIFY_SOFTWARE_DELEGATED:
+ if (!IS_ENABLED(CONFIG_ARM_SDE_INTERFACE)) {
+ pr_warn(GHES_PFX "Generic hardware error source: %d notified via SDE Interface is not supported!\n",
+ generic->header.source_id);
+ goto err;
+ }
+ break;
case ACPI_HEST_NOTIFY_LOCAL:
pr_warning(GHES_PFX "Generic hardware error source: %d notified via local interrupt is not supported!\n",
generic->header.source_id);
@@ -1127,6 +1212,11 @@ static int ghes_probe(struct platform_device *ghes_dev)
case ACPI_HEST_NOTIFY_NMI:
ghes_nmi_add(ghes);
break;
+ case ACPI_HEST_NOTIFY_SOFTWARE_DELEGATED:
+ rc = apei_sdei_register_ghes(ghes);
+ if (rc)
+ goto err;
+ break;
default:
BUG();
}
@@ -1136,7 +1226,9 @@ static int ghes_probe(struct platform_device *ghes_dev)
ghes_edac_register(ghes, &ghes_dev->dev);
/* Handle any pending errors right away */
+ spin_lock_irqsave(&ghes_notify_lock_irq, flags);
ghes_proc(ghes);
+ spin_unlock_irqrestore(&ghes_notify_lock_irq, flags);
return 0;
@@ -1150,6 +1242,7 @@ err:
static int ghes_remove(struct platform_device *ghes_dev)
{
+ int rc;
struct ghes *ghes;
struct acpi_hest_generic *generic;
@@ -1182,6 +1275,11 @@ static int ghes_remove(struct platform_device *ghes_dev)
case ACPI_HEST_NOTIFY_NMI:
ghes_nmi_remove(ghes);
break;
+ case ACPI_HEST_NOTIFY_SOFTWARE_DELEGATED:
+ rc = apei_sdei_unregister_ghes(ghes);
+ if (rc)
+ return rc;
+ break;
default:
BUG();
break;
@@ -1230,18 +1328,9 @@ static int __init ghes_init(void)
ghes_nmi_init_cxt();
- rc = ghes_estatus_pool_init();
- if (rc)
- goto err;
-
- rc = ghes_estatus_pool_expand(GHES_ESTATUS_CACHE_AVG_SIZE *
- GHES_ESTATUS_CACHE_ALLOCED_MAX);
- if (rc)
- goto err_pool_exit;
-
rc = platform_driver_register(&ghes_platform_driver);
if (rc)
- goto err_pool_exit;
+ goto err;
rc = apei_osc_setup();
if (rc == 0 && osc_sb_apei_support_acked)
@@ -1254,8 +1343,6 @@ static int __init ghes_init(void)
pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");
return 0;
-err_pool_exit:
- ghes_estatus_pool_exit();
err:
return rc;
}
diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
index b1e9f81ebeea..8113ddb14d28 100644
--- a/drivers/acpi/apei/hest.c
+++ b/drivers/acpi/apei/hest.c
@@ -32,6 +32,7 @@
#include <linux/io.h>
#include <linux/platform_device.h>
#include <acpi/apei.h>
+#include <acpi/ghes.h>
#include "apei-internal.h"
@@ -53,6 +54,7 @@ static const int hest_esrc_len_tab[ACPI_HEST_TYPE_RESERVED] = {
[ACPI_HEST_TYPE_AER_BRIDGE] = sizeof(struct acpi_hest_aer_bridge),
[ACPI_HEST_TYPE_GENERIC_ERROR] = sizeof(struct acpi_hest_generic),
[ACPI_HEST_TYPE_GENERIC_ERROR_V2] = sizeof(struct acpi_hest_generic_v2),
+ [ACPI_HEST_TYPE_IA32_DEFERRED_CHECK] = -1,
};
static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
@@ -75,6 +77,11 @@ static int hest_esrc_len(struct acpi_hest_header *hest_hdr)
mc = (struct acpi_hest_ia_machine_check *)hest_hdr;
len = sizeof(*mc) + mc->num_hardware_banks *
sizeof(struct acpi_hest_ia_error_bank);
+ } else if (hest_type == ACPI_HEST_TYPE_IA32_DEFERRED_CHECK) {
+ struct acpi_hest_ia_deferred_check *mc;
+ mc = (struct acpi_hest_ia_deferred_check *)hest_hdr;
+ len = sizeof(*mc) + mc->num_hardware_banks *
+ sizeof(struct acpi_hest_ia_error_bank);
}
BUG_ON(len == -1);
@@ -203,6 +210,11 @@ static int __init hest_ghes_dev_register(unsigned int ghes_count)
rc = apei_hest_parse(hest_parse_ghes, &ghes_arr);
if (rc)
goto err;
+
+ rc = ghes_estatus_pool_init(ghes_count);
+ if (rc)
+ goto err;
+
out:
kfree(ghes_arr.ghes_devs);
return rc;
@@ -251,7 +263,9 @@ void __init acpi_hest_init(void)
rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
if (rc)
goto err;
- rc = hest_ghes_dev_register(ghes_count);
+
+ if (ghes_count)
+ rc = hest_ghes_dev_register(ghes_count);
if (rc)
goto err;
}