diff options
Diffstat (limited to 'drivers/s390/char/sclp_early.c')
| -rw-r--r-- | drivers/s390/char/sclp_early.c | 97 |
1 files changed, 63 insertions, 34 deletions
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c index e792cee3b51c..6bf501ad8ff0 100644 --- a/drivers/s390/char/sclp_early.c +++ b/drivers/s390/char/sclp_early.c @@ -5,13 +5,16 @@ * Copyright IBM Corp. 2013 */ -#define KMSG_COMPONENT "sclp_early" -#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt +#define pr_fmt(fmt) "sclp_early: " fmt +#include <linux/export.h> #include <linux/errno.h> -#include <asm/ctl_reg.h> +#include <linux/memblock.h> +#include <asm/ctlreg.h> #include <asm/sclp.h> #include <asm/ipl.h> +#include <asm/setup.h> +#include <asm/facility.h> #include "sclp_sdias.h" #include "sclp.h" @@ -20,12 +23,14 @@ static struct sclp_ipl_info sclp_ipl_info; struct sclp_info sclp; EXPORT_SYMBOL(sclp); -static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) +static void __init sclp_early_facilities_detect(void) { struct sclp_core_entry *cpue; + struct read_info_sccb *sccb; u16 boot_cpu_address, cpu; - if (sclp_early_get_info(sccb)) + sccb = sclp_early_get_info(); + if (!sccb) return; sclp.facilities = sccb->facilities; @@ -39,11 +44,25 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) sclp.has_ibs = !!(sccb->fac117 & 0x20); sclp.has_gisaf = !!(sccb->fac118 & 0x08); sclp.has_hvs = !!(sccb->fac119 & 0x80); + sclp.has_wti = !!(sccb->fac119 & 0x40); sclp.has_kss = !!(sccb->fac98 & 0x01); - if (sccb->fac85 & 0x02) - S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP; - if (sccb->fac91 & 0x40) - S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST; + sclp.has_aisii = !!(sccb->fac118 & 0x40); + sclp.has_aeni = !!(sccb->fac118 & 0x20); + sclp.has_aisi = !!(sccb->fac118 & 0x10); + sclp.has_zpci_lsi = !!(sccb->fac118 & 0x01); + sclp.has_diag204_bif = !!(sccb->fac98 & 0x80); + sclp.has_diag310 = !!(sccb->fac91 & 0x80); + if (sccb->cpuoff > 134) { + sclp.has_diag318 = !!(sccb->byte_134 & 0x80); + sclp.has_diag320 = !!(sccb->byte_134 & 0x04); + sclp.has_iplcc = !!(sccb->byte_134 & 0x02); + } + if (sccb->cpuoff > 137) { + sclp.has_sipl = !!(sccb->cbl & 0x4000); + sclp.has_sipl_eckd = !!(sccb->cbl & 0x2000); + } + if (sccb->cpuoff > 139) + sclp.has_diag324 = !!(sccb->byte_139 & 0x80); sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; sclp.rzm <<= 20; @@ -55,7 +74,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) sclp.hamax = U64_MAX; if (!sccb->hcpua) { - if (MACHINE_IS_VM) + if (machine_is_vm()) sclp.max_cores = 64; else sclp.max_cores = sccb->ncpurl; @@ -91,6 +110,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb) sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0; sclp.hmfai = sccb->hmfai; + sclp.has_dirq = !!(sccb->cpudirq & 0x80); } /* @@ -103,29 +123,34 @@ void __init sclp_early_get_ipl_info(struct sclp_ipl_info *info) *info = sclp_ipl_info; } -static struct sclp_core_info sclp_early_core_info __initdata; -static int sclp_early_core_info_valid __initdata; - -static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb) -{ - if (!SCLP_HAS_CPU_INFO) - return; - memset(sccb, 0, sizeof(*sccb)); - sccb->header.length = sizeof(*sccb); - if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb)) - return; - if (sccb->header.response_code != 0x0010) - return; - sclp_fill_core_info(&sclp_early_core_info, sccb); - sclp_early_core_info_valid = 1; -} - int __init sclp_early_get_core_info(struct sclp_core_info *info) { - if (!sclp_early_core_info_valid) - return -EIO; - *info = sclp_early_core_info; - return 0; + struct read_cpu_info_sccb *sccb; + int length = test_facility(140) ? EXT_SCCB_READ_CPU : PAGE_SIZE; + int rc = 0; + + if (!SCLP_HAS_CPU_INFO) + return -EOPNOTSUPP; + + sccb = memblock_alloc_low(length, PAGE_SIZE); + if (!sccb) + return -ENOMEM; + + memset(sccb, 0, length); + sccb->header.length = length; + sccb->header.control_mask[2] = 0x80; + if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb)) { + rc = -EIO; + goto out; + } + if (sccb->header.response_code != 0x0010) { + rc = -EIO; + goto out; + } + sclp_fill_core_info(info, sccb); +out: + memblock_free(sccb, length); + return rc; } static void __init sclp_early_console_detect(struct init_sccb *sccb) @@ -140,12 +165,16 @@ static void __init sclp_early_console_detect(struct init_sccb *sccb) sclp.has_linemode = 1; } +void __init __no_sanitize_address sclp_early_adjust_va(void) +{ + sclp_early_sccb = __va((unsigned long)sclp_early_sccb); +} + void __init sclp_early_detect(void) { - void *sccb = &sclp_early_sccb; + void *sccb = sclp_early_sccb; - sclp_early_facilities_detect(sccb); - sclp_early_init_core_info(sccb); + sclp_early_facilities_detect(); /* * Turn off SCLP event notifications. Also save remote masks in the |