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Subject[PATCH v2 3/8] efi: Decode IA32/X64 Processor Error Info Structure
Date
From: Yazen Ghannam <yazen.ghannam@amd.com>

Print the fields in the IA32/X64 Processor Error Info Structure.

Based on UEFI 2.7 Table 256. IA32/X64 Processor Error Information
Structure.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lkml.kernel.org/r/20180223200333.6410-4-Yazen.Ghannam@amd.com

v1->v2:
* Add parantheses around "bits" expression in macro.
* Fix indentation on multi-line statements.

drivers/firmware/efi/cper-x86.c | 53 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)

diff --git a/drivers/firmware/efi/cper-x86.c b/drivers/firmware/efi/cper-x86.c
index 9da0d981178f..417bd4e500a7 100644
--- a/drivers/firmware/efi/cper-x86.c
+++ b/drivers/firmware/efi/cper-x86.c
@@ -3,15 +3,28 @@

#include <linux/cper.h>

+#define INDENT_SP " "
+
/*
* We don't need a "CPER_IA" prefix since these are all locally defined.
* This will save us a lot of line space.
*/
#define VALID_LAPIC_ID BIT_ULL(0)
#define VALID_CPUID_INFO BIT_ULL(1)
+#define VALID_PROC_ERR_INFO_NUM(bits) (((bits) & GENMASK_ULL(7, 2)) >> 2)
+
+#define INFO_VALID_CHECK_INFO BIT_ULL(0)
+#define INFO_VALID_TARGET_ID BIT_ULL(1)
+#define INFO_VALID_REQUESTOR_ID BIT_ULL(2)
+#define INFO_VALID_RESPONDER_ID BIT_ULL(3)
+#define INFO_VALID_IP BIT_ULL(4)

void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)
{
+ int i;
+ struct cper_ia_err_info *err_info;
+ char newpfx[64];
+
printk("%sValidation Bits: 0x%016llx\n", pfx, proc->validation_bits);

if (proc->validation_bits & VALID_LAPIC_ID)
@@ -22,4 +35,44 @@ void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)
print_hex_dump(pfx, "", DUMP_PREFIX_OFFSET, 16, 4, proc->cpuid,
sizeof(proc->cpuid), 0);
}
+
+ snprintf(newpfx, sizeof(newpfx), "%s%s", pfx, INDENT_SP);
+
+ err_info = (struct cper_ia_err_info *)(proc + 1);
+ for (i = 0; i < VALID_PROC_ERR_INFO_NUM(proc->validation_bits); i++) {
+ printk("%sError Information Structure %d:\n", pfx, i);
+
+ printk("%sError Structure Type: %pUl\n", newpfx,
+ &err_info->err_type);
+
+ printk("%sValidation Bits: 0x%016llx\n",
+ newpfx, err_info->validation_bits);
+
+ if (err_info->validation_bits & INFO_VALID_CHECK_INFO) {
+ printk("%sCheck Information: 0x%016llx\n", newpfx,
+ err_info->check_info);
+ }
+
+ if (err_info->validation_bits & INFO_VALID_TARGET_ID) {
+ printk("%sTarget Identifier: 0x%016llx\n",
+ newpfx, err_info->target_id);
+ }
+
+ if (err_info->validation_bits & INFO_VALID_REQUESTOR_ID) {
+ printk("%sRequestor Identifier: 0x%016llx\n",
+ newpfx, err_info->requestor_id);
+ }
+
+ if (err_info->validation_bits & INFO_VALID_RESPONDER_ID) {
+ printk("%sResponder Identifier: 0x%016llx\n",
+ newpfx, err_info->responder_id);
+ }
+
+ if (err_info->validation_bits & INFO_VALID_IP) {
+ printk("%sInstruction Pointer: 0x%016llx\n",
+ newpfx, err_info->ip);
+ }
+
+ err_info++;
+ }
}
--
2.14.1
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