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/* SPDX-License-Identifier: GPL-2.0-only */
#include <amdblocks/mca.h>
#include <amdblocks/reset.h>
#include <cpu/amd/msr.h>
#include <cpu/x86/lapic.h>
#include <cpu/x86/msr.h>
#include <acpi/acpi.h>
#include <console/console.h>
#include <arch/bert_storage.h>
#include <cper.h>
#include <types.h>
struct mca_bank_status {
unsigned int bank;
msr_t sts;
};
static inline size_t mca_report_size_reqd(void)
{
size_t size;
size = sizeof(acpi_generic_error_status_t);
size += sizeof(acpi_hest_generic_data_v300_t);
size += sizeof(cper_proc_generic_error_section_t);
size += sizeof(acpi_hest_generic_data_v300_t);
size += sizeof(cper_ia32x64_proc_error_section_t);
/* Check Error */
size += cper_ia32x64_check_sz();
/* Context of MCG_CAP, MCG_STAT, MCG_CTL */
size += cper_ia32x64_ctx_sz_bytype(CPER_IA32X64_CTX_MSR, 3);
/* Context of MCi_CTL, MCi_STATUS, MCi_ADDR, MCi_MISC */
size += cper_ia32x64_ctx_sz_bytype(CPER_IA32X64_CTX_MSR, 4);
/* Context of CTL_MASK */
size += cper_ia32x64_ctx_sz_bytype(CPER_IA32X64_CTX_MSR, 1);
return size;
}
static enum cper_x86_check_type error_to_chktype(struct mca_bank_status *mci)
{
int error = mca_err_type(mci->sts);
if (error == MCA_ERRTYPE_BUS)
return X86_PROCESSOR_BUS_CHK;
if (error == MCA_ERRTYPE_INT)
return X86_PROCESSOR_MS_CHK;
if (error == MCA_ERRTYPE_MEM)
return X86_PROCESSOR_CACHE_CHK;
if (error == MCA_ERRTYPE_TLB)
return X86_PROCESSOR_TLB_CHK;
return X86_PROCESSOR_MS_CHK; /* unrecognized */
}
/* Fill additional information in the Generic Processor Error Section. */
static void fill_generic_section(cper_proc_generic_error_section_t *sec,
struct mca_bank_status *mci)
{
int type = mca_err_type(mci->sts);
if (type == MCA_ERRTYPE_BUS) /* try to map MCA errors to CPER types */
sec->error_type = GENPROC_ERRTYPE_BUS;
else if (type == MCA_ERRTYPE_INT)
sec->error_type = GENPROC_ERRTYPE_UARCH;
else if (type == MCA_ERRTYPE_MEM)
sec->error_type = GENPROC_ERRTYPE_CACHE;
else if (type == MCA_ERRTYPE_TLB)
sec->error_type = GENPROC_ERRTYPE_TLB;
else
sec->error_type = GENPROC_ERRTYPE_UNKNOWN;
sec->validation |= GENPROC_VALID_PROC_ERR_TYPE;
}
/* Convert an error reported by an MCA bank into BERT information to be reported
* by the OS. The ACPI driver doesn't recognize/parse the IA32/X64 structure,
* which is the best method to report MSR context. As a result, add two
* structures: A "processor generic error" that is parsed, and an IA32/X64 one
* to capture complete information.
*
* Future work may attempt to interpret the specific Family 15h error symptoms
* found in the MCA registers. This data could enhance the reporting of the
* Processor Generic section and the failing error/check added to the
* IA32/X64 section.
*/
static void build_bert_mca_error(struct mca_bank_status *mci)
{
acpi_generic_error_status_t *status;
acpi_hest_generic_data_v300_t *gen_entry;
acpi_hest_generic_data_v300_t *x86_entry;
cper_proc_generic_error_section_t *gen_sec;
cper_ia32x64_proc_error_section_t *x86_sec;
cper_ia32x64_proc_error_info_t *chk;
cper_ia32x64_context_t *ctx;
if (mca_report_size_reqd() > bert_storage_remaining())
goto failed;
status = bert_new_event(&CPER_SEC_PROC_GENERIC_GUID);
if (!status)
goto failed;
gen_entry = acpi_hest_generic_data3(status);
gen_sec = section_of_acpientry(gen_sec, gen_entry);
fill_generic_section(gen_sec, mci);
x86_entry = bert_append_ia32x64(status);
x86_sec = section_of_acpientry(x86_sec, x86_entry);
chk = new_cper_ia32x64_check(status, x86_sec, error_to_chktype(mci));
if (!chk)
goto failed;
ctx = cper_new_ia32x64_context_msr(status, x86_sec, IA32_MCG_CAP, 3);
if (!ctx)
goto failed;
ctx = cper_new_ia32x64_context_msr(status, x86_sec, IA32_MC_CTL(mci->bank), 4);
if (!ctx)
goto failed;
ctx = cper_new_ia32x64_context_msr(status, x86_sec, MC_CTL_MASK(mci->bank), 1);
if (!ctx)
goto failed;
return;
failed:
/* We're here because of a hardware error, don't break something else */
printk(BIOS_ERR, "Error: Not enough room in BERT region for Machine Check error\n");
}
static const char *const mca_bank_name[] = {
[0] = "Load-store unit",
[1] = "Instruction fetch unit",
[2] = "Combined unit",
/* Bank 3 is reserved and not all corresponding MSRs are implemented in Family 15h.
Accessing non-existing MSRs causes a general protection fault. */
[3] = NULL,
[4] = "Northbridge",
[5] = "Execution unit",
[6] = "Floating point unit"
};
static bool mca_is_valid_bank(unsigned int bank)
{
return (bank < ARRAY_SIZE(mca_bank_name) && mca_bank_name[bank] != NULL);
}
static const char *mca_get_bank_name(unsigned int bank)
{
if (mca_is_valid_bank(bank))
return mca_bank_name[bank];
else
return "";
}
static void mca_print_error(unsigned int bank)
{
msr_t msr;
printk(BIOS_WARNING, "#MC Error: core %u, bank %u %s\n", initial_lapicid(), bank,
mca_get_bank_name(bank));
msr = rdmsr(IA32_MC_STATUS(bank));
printk(BIOS_WARNING, " MC%u_STATUS = %08x_%08x\n", bank, msr.hi, msr.lo);
msr = rdmsr(IA32_MC_ADDR(bank));
printk(BIOS_WARNING, " MC%u_ADDR = %08x_%08x\n", bank, msr.hi, msr.lo);
msr = rdmsr(IA32_MC_MISC(bank));
printk(BIOS_WARNING, " MC%u_MISC = %08x_%08x\n", bank, msr.hi, msr.lo);
msr = rdmsr(IA32_MC_CTL(bank));
printk(BIOS_WARNING, " MC%u_CTL = %08x_%08x\n", bank, msr.hi, msr.lo);
msr = rdmsr(MC_CTL_MASK(bank));
printk(BIOS_WARNING, " MC%u_CTL_MASK = %08x_%08x\n", bank, msr.hi, msr.lo);
}
static void mca_check_all_banks(void)
{
struct mca_bank_status mci;
const unsigned int num_banks = mca_get_bank_count();
if (!is_warm_reset())
return;
for (unsigned int i = 0 ; i < num_banks ; i++) {
if (!mca_is_valid_bank(i))
continue;
mci.bank = i;
mci.sts = rdmsr(IA32_MC_STATUS(i));
if (mci.sts.hi || mci.sts.lo) {
mca_print_error(i);
if (CONFIG(ACPI_BERT) && mca_valid(mci.sts))
build_bert_mca_error(&mci);
}
}
}
void check_mca(void)
{
mca_check_all_banks();
mca_clear_status();
}
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