@@ -161,6 +161,8 @@ extern int x86_acpi_numa_init(void);
#define acpi_unlazy_tlb(x) leave_mm(x)
+struct cper_ia_proc_ctx;
+
#ifdef CONFIG_ACPI_APEI
static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
{
@@ -179,6 +181,15 @@ static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
*/
return PAGE_KERNEL_NOENC;
}
+
+int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
+ u64 lapic_id);
+#else
+static inline int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
+ u64 lapic_id)
+{
+ return -EINVAL;
+}
#endif
#define ACPI_TABLE_UPGRADE_MAX_PHYS (max_low_pfn_mapped << PAGE_SHIFT)
@@ -287,6 +287,9 @@ struct cper_sec_mem_err;
extern void apei_mce_report_mem_error(int corrected,
struct cper_sec_mem_err *mem_err);
+struct cper_ia_proc_ctx;
+int apei_mce_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id);
+
/*
* Enumerate new IP types and HWID values in AMD processors which support
* Scalable MCA.
@@ -43,3 +43,12 @@ void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
apei_mce_report_mem_error(sev, mem_err);
#endif
}
+
+int arch_apei_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
+{
+ int err = -EINVAL;
+#ifdef CONFIG_X86_MCE
+ err = apei_mce_report_x86_error(ctx_info, lapic_id);
+#endif
+ return err;
+}
@@ -26,6 +26,8 @@
#include "internal.h"
+#define MASK_MCA_STATUS 0xC0002001
+
void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err)
{
struct mce m;
@@ -51,6 +53,46 @@ void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err)
}
EXPORT_SYMBOL_GPL(apei_mce_report_mem_error);
+int apei_mce_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
+{
+ const u64 *i_mce = ((const void *) (ctx_info + 1));
+ unsigned int cpu;
+ struct mce m;
+
+ if (!boot_cpu_has(X86_FEATURE_SMCA))
+ return -EINVAL;
+
+ if ((ctx_info->msr_addr & MASK_MCA_STATUS) != MASK_MCA_STATUS)
+ return -EINVAL;
+
+ mce_setup(&m);
+
+ m.extcpu = -1;
+ m.socketid = -1;
+
+ for_each_possible_cpu(cpu) {
+ if (cpu_data(cpu).initial_apicid == lapic_id) {
+ m.extcpu = cpu;
+ m.socketid = cpu_data(m.extcpu).phys_proc_id;
+ break;
+ }
+ }
+
+ m.apicid = lapic_id;
+ m.bank = (ctx_info->msr_addr >> 4) & 0xFF;
+ m.status = *i_mce;
+ m.addr = *(i_mce + 1);
+ m.misc = *(i_mce + 2);
+ /* Skipping MCA_CONFIG */
+ m.ipid = *(i_mce + 4);
+ m.synd = *(i_mce + 5);
+
+ mce_log(&m);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(apei_mce_report_x86_error);
+
#define CPER_CREATOR_MCE \
GUID_INIT(0x75a574e3, 0x5052, 0x4b29, 0x8a, 0x8e, 0xbe, 0x2c, \
0x64, 0x90, 0xb8, 0x9d)
@@ -2,6 +2,7 @@
// Copyright (C) 2018, Advanced Micro Devices, Inc.
#include <linux/cper.h>
+#include <linux/acpi.h>
/*
* We don't need a "CPER_IA" prefix since these are all locally defined.
@@ -347,9 +348,12 @@ void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)
ctx_info->mm_reg_addr);
}
- printk("%sRegister Array:\n", newpfx);
- print_hex_dump(newpfx, "", DUMP_PREFIX_OFFSET, 16, groupsize,
- (ctx_info + 1), ctx_info->reg_arr_size, 0);
+ if (ctx_info->reg_ctx_type != CTX_TYPE_MSR ||
+ arch_apei_report_x86_error(ctx_info, proc->lapic_id)) {
+ printk("%sRegister Array:\n", newpfx);
+ print_hex_dump(newpfx, "", DUMP_PREFIX_OFFSET, 16, groupsize,
+ (ctx_info + 1), ctx_info->reg_arr_size, 0);
+ }
ctx_info = (struct cper_ia_proc_ctx *)((long)ctx_info + size);
}
Linux Kernel uses ACPI Boot Error Record Table (BERT) to report fatal errors that occurred in a previous boot. The MCA errors in the BERT are reported using the x86 Processor Error Common Platform Error Record (CPER) format. Currently, the record prints out the raw MSR values and AMD relies on the raw record to provide MCA information. Extract the raw MSR values of MCA registers from the BERT and feed it into the standard mce_log() function through the existing x86/MCA RAS infrastructure. This will result in better decoding from the EDAC MCE decoder or the default notifier. The implementation is SMCA specific as the raw MCA register values are given in the register offset order of the MCAX address space. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com> --- Link: https://lkml.kernel.org/r/20200828203332.11129-2-Smita.KoralahalliChannabasappa@amd.com v3: Moved arch specific declarations from generic header file to arch specific header file. Cleaned additional declarations which are unnecessary. Included the check for context type. Added a check to verify for the first MSR address in the register layout. v2: Fixed build error reported by kernel test robot. Passed struct variable as function argument instead of entire struct --- arch/x86/include/asm/acpi.h | 11 +++++++++ arch/x86/include/asm/mce.h | 3 +++ arch/x86/kernel/acpi/apei.c | 9 +++++++ arch/x86/kernel/cpu/mce/apei.c | 42 +++++++++++++++++++++++++++++++++ drivers/firmware/efi/cper-x86.c | 10 +++++--- 5 files changed, 72 insertions(+), 3 deletions(-)