[PATCH v3 0/3] Rework mce_setup()

[PATCH v3 0/3] Rework mce_setup()

[Yazen Ghannam]

Hi all,

This revision drops the topology export idea from v2. It seemed to add
more complexity than just doing a local search. 

Thanks,
Yazen

Link:
https://lkml.kernel.org/r/20240624212008.663832-1-yazen.ghannam@amd.com

Yazen Ghannam (3):
  x86/mce: Rename mce_setup() to mce_prep_record()
  x86/mce: Define mce_prep_record() helpers for common and per-CPU
    fields
  x86/mce: Use mce_prep_record() helpers for
    apei_smca_report_x86_error()

 arch/x86/include/asm/mce.h         |  2 +-
 arch/x86/kernel/cpu/mce/amd.c      |  2 +-
 arch/x86/kernel/cpu/mce/apei.c     | 18 +++++++-------
 arch/x86/kernel/cpu/mce/core.c     | 38 ++++++++++++++++++++----------
 arch/x86/kernel/cpu/mce/internal.h |  2 ++
 5 files changed, 38 insertions(+), 24 deletions(-)


base-commit: 1cd27e88888d54de5fefbeb0b44c26194ffa83ce
-- 
2.34.1

[PATCH v3 1/3] x86/mce: Rename mce_setup() to mce_prep_record()

[Yazen Ghannam]

There is no MCE "setup" done in mce_setup(). Rather this function
initializes and prepares an MCE record.

Rename the function to highlight what it does.

No functional change is intended.

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lkml.kernel.org/r/20240624212008.663832-4-yazen.ghannam@amd.com

v2->v3:
* No change.

v1->v2:
* No change.

 arch/x86/include/asm/mce.h     | 2 +-
 arch/x86/kernel/cpu/mce/amd.c  | 2 +-
 arch/x86/kernel/cpu/mce/apei.c | 4 ++--
 arch/x86/kernel/cpu/mce/core.c | 6 +++---
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 3ad29b128943..3b9970117a0f 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -221,7 +221,7 @@ static inline int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
 					     u64 lapic_id) { return -EINVAL; }
 #endif
 
-void mce_setup(struct mce *m);
+void mce_prep_record(struct mce *m);
 void mce_log(struct mce *m);
 DECLARE_PER_CPU(struct device *, mce_device);
 
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 9a0133ef7e20..14bf8c232e45 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -780,7 +780,7 @@ static void __log_error(unsigned int bank, u64 status, u64 addr, u64 misc)
 {
 	struct mce m;
 
-	mce_setup(&m);
+	mce_prep_record(&m);
 
 	m.status = status;
 	m.misc   = misc;
diff --git a/arch/x86/kernel/cpu/mce/apei.c b/arch/x86/kernel/cpu/mce/apei.c
index 7f7309ff67d0..8f509c8a4e98 100644
--- a/arch/x86/kernel/cpu/mce/apei.c
+++ b/arch/x86/kernel/cpu/mce/apei.c
@@ -44,7 +44,7 @@ void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err)
 	else
 		lsb = PAGE_SHIFT;
 
-	mce_setup(&m);
+	mce_prep_record(&m);
 	m.bank = -1;
 	/* Fake a memory read error with unknown channel */
 	m.status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | MCI_STATUS_MISCV | 0x9f;
@@ -97,7 +97,7 @@ int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
 	if (ctx_info->reg_arr_size < 48)
 		return -EINVAL;
 
-	mce_setup(&m);
+	mce_prep_record(&m);
 
 	m.extcpu = -1;
 	m.socketid = -1;
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index b85ec7a4ec9e..dd5192ef52e0 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -118,7 +118,7 @@ static struct irq_work mce_irq_work;
 BLOCKING_NOTIFIER_HEAD(x86_mce_decoder_chain);
 
 /* Do initial initialization of a struct mce */
-void mce_setup(struct mce *m)
+void mce_prep_record(struct mce *m)
 {
 	memset(m, 0, sizeof(struct mce));
 	m->cpu = m->extcpu = smp_processor_id();
@@ -436,11 +436,11 @@ static noinstr void mce_wrmsrl(u32 msr, u64 v)
 static noinstr void mce_gather_info(struct mce *m, struct pt_regs *regs)
 {
 	/*
-	 * Enable instrumentation around mce_setup() which calls external
+	 * Enable instrumentation around mce_prep_record() which calls external
 	 * facilities.
 	 */
 	instrumentation_begin();
-	mce_setup(m);
+	mce_prep_record(m);
 	instrumentation_end();
 
 	m->mcgstatus = mce_rdmsrl(MSR_IA32_MCG_STATUS);
-- 
2.34.1

[PATCH v3 2/3] x86/mce: Define mce_prep_record() helpers for common and per-CPU fields

[Yazen Ghannam]

Generally, MCA information for an error is gathered on the CPU that
reported the error. In this case, CPU-specific information from the
running CPU will be correct.

However, this will be incorrect if the MCA information is gathered while
running on a CPU that didn't report the error. One example is creating
an MCA record using mce_prep_record() for errors reported from ACPI.

Split mce_prep_record() so that there is a helper function to gather
common, i.e. not CPU-specific, information and another helper for
CPU-specific information.

Leave mce_prep_record() defined as-is for the common case when running
on the reporting CPU.

Get MCG_CAP in the global helper even though the register is per-CPU.
This value is not already cached per-CPU like other values. And it does
not assist with any per-CPU decoding or handling.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lkml.kernel.org/r/20240624212008.663832-5-yazen.ghannam@amd.com

v2->v3:
* Use topology_*() helpers (Nikolay).

v1->v2:
* No change.

 arch/x86/kernel/cpu/mce/core.c     | 34 ++++++++++++++++++++----------
 arch/x86/kernel/cpu/mce/internal.h |  2 ++
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index dd5192ef52e0..2a938f429c4d 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -117,20 +117,32 @@ static struct irq_work mce_irq_work;
  */
 BLOCKING_NOTIFIER_HEAD(x86_mce_decoder_chain);
 
-/* Do initial initialization of a struct mce */
-void mce_prep_record(struct mce *m)
+void mce_prep_record_common(struct mce *m)
 {
 	memset(m, 0, sizeof(struct mce));
-	m->cpu = m->extcpu = smp_processor_id();
+
+	m->cpuid	= cpuid_eax(1);
+	m->cpuvendor	= boot_cpu_data.x86_vendor;
+	m->mcgcap	= __rdmsr(MSR_IA32_MCG_CAP);
 	/* need the internal __ version to avoid deadlocks */
-	m->time = __ktime_get_real_seconds();
-	m->cpuvendor = boot_cpu_data.x86_vendor;
-	m->cpuid = cpuid_eax(1);
-	m->socketid = cpu_data(m->extcpu).topo.pkg_id;
-	m->apicid = cpu_data(m->extcpu).topo.initial_apicid;
-	m->mcgcap = __rdmsr(MSR_IA32_MCG_CAP);
-	m->ppin = cpu_data(m->extcpu).ppin;
-	m->microcode = boot_cpu_data.microcode;
+	m->time		= __ktime_get_real_seconds();
+}
+
+void mce_prep_record_per_cpu(unsigned int cpu, struct mce *m)
+{
+	m->cpu		= cpu;
+	m->extcpu	= cpu;
+	m->apicid	= cpu_data(cpu).topo.initial_apicid;
+	m->microcode	= cpu_data(cpu).microcode;
+	m->ppin		= topology_ppin(cpu);
+	m->socketid	= topology_physical_package_id(cpu);
+}
+
+/* Do initial initialization of a struct mce */
+void mce_prep_record(struct mce *m)
+{
+	mce_prep_record_common(m);
+	mce_prep_record_per_cpu(smp_processor_id(), m);
 }
 
 DEFINE_PER_CPU(struct mce, injectm);
diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h
index 01f8f03969e6..43c7f3b71df5 100644
--- a/arch/x86/kernel/cpu/mce/internal.h
+++ b/arch/x86/kernel/cpu/mce/internal.h
@@ -261,6 +261,8 @@ enum mca_msr {
 
 /* Decide whether to add MCE record to MCE event pool or filter it out. */
 extern bool filter_mce(struct mce *m);
+void mce_prep_record_common(struct mce *m);
+void mce_prep_record_per_cpu(unsigned int cpu, struct mce *m);
 
 #ifdef CONFIG_X86_MCE_AMD
 extern bool amd_filter_mce(struct mce *m);
-- 
2.34.1

[PATCH v3 3/3] x86/mce: Use mce_prep_record() helpers for apei_smca_report_x86_error()

[Yazen Ghannam]

Current AMD systems can report MCA errors using the ACPI Boot Error
Record Table (BERT). The BERT entries for MCA errors will be an x86
Common Platform Error Record (CPER) with an MSR register context that
matches the MCAX/SMCA register space.

However, the BERT will not necessarily be processed on the CPU that
reported the MCA errors. Therefore, the correct CPU number needs to be
determined and the information saved in struct mce.

Use the newly defined mce_prep_record_*() helpers to get the correct
data.

Also, add an explicit check to verify that a valid CPU number was found
from the APIC ID search.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
---
Link:
https://lkml.kernel.org/r/20240624212008.663832-6-yazen.ghannam@amd.com

v2->v3:
* Drop topology export changes from v2.
* Use boolean for match search (Boris).

v1->v2:
* Rebased on topology export changes from patches 1 and 2.

 arch/x86/kernel/cpu/mce/apei.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/apei.c b/arch/x86/kernel/cpu/mce/apei.c
index 8f509c8a4e98..3885fe05f01e 100644
--- a/arch/x86/kernel/cpu/mce/apei.c
+++ b/arch/x86/kernel/cpu/mce/apei.c
@@ -66,6 +66,7 @@ EXPORT_SYMBOL_GPL(apei_mce_report_mem_error);
 int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
 {
 	const u64 *i_mce = ((const u64 *) (ctx_info + 1));
+	bool apicid_found = false;
 	unsigned int cpu;
 	struct mce m;
 
@@ -97,20 +98,19 @@ int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
 	if (ctx_info->reg_arr_size < 48)
 		return -EINVAL;
 
-	mce_prep_record(&m);
-
-	m.extcpu = -1;
-	m.socketid = -1;
-
 	for_each_possible_cpu(cpu) {
 		if (cpu_data(cpu).topo.initial_apicid == lapic_id) {
-			m.extcpu = cpu;
-			m.socketid = cpu_data(m.extcpu).topo.pkg_id;
+			apicid_found = true;
 			break;
 		}
 	}
 
-	m.apicid = lapic_id;
+	if (!apicid_found)
+		return -EINVAL;
+
+	mce_prep_record_common(&m);
+	mce_prep_record_per_cpu(cpu, &m);
+
 	m.bank = (ctx_info->msr_addr >> 4) & 0xFF;
 	m.status = *i_mce;
 	m.addr = *(i_mce + 1);
-- 
2.34.1

Re: [PATCH v3 0/3] Rework mce_setup()

[Nikolay Borisov]

On 30.07.24 г. 21:29 ч., Yazen Ghannam wrote:
> Hi all,
> 
> This revision drops the topology export idea from v2. It seemed to add
> more complexity than just doing a local search.
> 
> Thanks,
> Yazen
> 
> Link:
> https://lkml.kernel.org/r/20240624212008.663832-1-yazen.ghannam@amd.com
> 
> Yazen Ghannam (3):
>    x86/mce: Rename mce_setup() to mce_prep_record()
>    x86/mce: Define mce_prep_record() helpers for common and per-CPU
>      fields
>    x86/mce: Use mce_prep_record() helpers for
>      apei_smca_report_x86_error()
> 
>   arch/x86/include/asm/mce.h         |  2 +-
>   arch/x86/kernel/cpu/mce/amd.c      |  2 +-
>   arch/x86/kernel/cpu/mce/apei.c     | 18 +++++++-------
>   arch/x86/kernel/cpu/mce/core.c     | 38 ++++++++++++++++++++----------
>   arch/x86/kernel/cpu/mce/internal.h |  2 ++
>   5 files changed, 38 insertions(+), 24 deletions(-)
> 
> 
> base-commit: 1cd27e88888d54de5fefbeb0b44c26194ffa83ce


Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>

[tip: ras/core] x86/mce: Use mce_prep_record() helpers for apei_smca_report_x86_error()

[tip-bot2 for Yazen Ghannam]

The following commit has been merged into the ras/core branch of tip:

Commit-ID:     793aa4bf192d0ad07cca001a596f955d121f5c10
Gitweb:        https://git.kernel.org/tip/793aa4bf192d0ad07cca001a596f955d121f5c10
Author:        Yazen Ghannam <yazen.ghannam@amd.com>
AuthorDate:    Tue, 30 Jul 2024 13:29:58 -05:00
Committer:     Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Thu, 01 Aug 2024 18:20:25 +02:00

x86/mce: Use mce_prep_record() helpers for apei_smca_report_x86_error()

Current AMD systems can report MCA errors using the ACPI Boot Error
Record Table (BERT). The BERT entries for MCA errors will be an x86
Common Platform Error Record (CPER) with an MSR register context that
matches the MCAX/SMCA register space.

However, the BERT will not necessarily be processed on the CPU that
reported the MCA errors. Therefore, the correct CPU number needs to be
determined and the information saved in struct mce.

Use the newly defined mce_prep_record_*() helpers to get the correct
data.

Also, add an explicit check to verify that a valid CPU number was found
from the APIC ID search.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/r/20240730182958.4117158-4-yazen.ghannam@amd.com
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
---
 arch/x86/kernel/cpu/mce/apei.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/apei.c b/arch/x86/kernel/cpu/mce/apei.c
index 8f509c8..3885fe0 100644
--- a/arch/x86/kernel/cpu/mce/apei.c
+++ b/arch/x86/kernel/cpu/mce/apei.c
@@ -66,6 +66,7 @@ EXPORT_SYMBOL_GPL(apei_mce_report_mem_error);
 int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
 {
 	const u64 *i_mce = ((const u64 *) (ctx_info + 1));
+	bool apicid_found = false;
 	unsigned int cpu;
 	struct mce m;
 
@@ -97,20 +98,19 @@ int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
 	if (ctx_info->reg_arr_size < 48)
 		return -EINVAL;
 
-	mce_prep_record(&m);
-
-	m.extcpu = -1;
-	m.socketid = -1;
-
 	for_each_possible_cpu(cpu) {
 		if (cpu_data(cpu).topo.initial_apicid == lapic_id) {
-			m.extcpu = cpu;
-			m.socketid = cpu_data(m.extcpu).topo.pkg_id;
+			apicid_found = true;
 			break;
 		}
 	}
 
-	m.apicid = lapic_id;
+	if (!apicid_found)
+		return -EINVAL;
+
+	mce_prep_record_common(&m);
+	mce_prep_record_per_cpu(cpu, &m);
+
 	m.bank = (ctx_info->msr_addr >> 4) & 0xFF;
 	m.status = *i_mce;
 	m.addr = *(i_mce + 1);

[tip: ras/core] x86/mce: Define mce_prep_record() helpers for common and per-CPU fields

[tip-bot2 for Yazen Ghannam]

The following commit has been merged into the ras/core branch of tip:

Commit-ID:     f9bbb8ad0c8b2f37e3d474b8693f563e4a29e92e
Gitweb:        https://git.kernel.org/tip/f9bbb8ad0c8b2f37e3d474b8693f563e4a29e92e
Author:        Yazen Ghannam <yazen.ghannam@amd.com>
AuthorDate:    Tue, 30 Jul 2024 13:29:57 -05:00
Committer:     Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Thu, 01 Aug 2024 18:20:25 +02:00

x86/mce: Define mce_prep_record() helpers for common and per-CPU fields

Generally, MCA information for an error is gathered on the CPU that
reported the error. In this case, CPU-specific information from the
running CPU will be correct.

However, this will be incorrect if the MCA information is gathered while
running on a CPU that didn't report the error. One example is creating
an MCA record using mce_prep_record() for errors reported from ACPI.

Split mce_prep_record() so that there is a helper function to gather
common, i.e. not CPU-specific, information and another helper for
CPU-specific information.

Leave mce_prep_record() defined as-is for the common case when running
on the reporting CPU.

Get MCG_CAP in the global helper even though the register is per-CPU.
This value is not already cached per-CPU like other values. And it does
not assist with any per-CPU decoding or handling.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/r/20240730182958.4117158-3-yazen.ghannam@amd.com
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
---
 arch/x86/kernel/cpu/mce/core.c     | 34 +++++++++++++++++++----------
 arch/x86/kernel/cpu/mce/internal.h |  2 ++-
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index dd5192e..2a938f4 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -117,20 +117,32 @@ static struct irq_work mce_irq_work;
  */
 BLOCKING_NOTIFIER_HEAD(x86_mce_decoder_chain);
 
-/* Do initial initialization of a struct mce */
-void mce_prep_record(struct mce *m)
+void mce_prep_record_common(struct mce *m)
 {
 	memset(m, 0, sizeof(struct mce));
-	m->cpu = m->extcpu = smp_processor_id();
+
+	m->cpuid	= cpuid_eax(1);
+	m->cpuvendor	= boot_cpu_data.x86_vendor;
+	m->mcgcap	= __rdmsr(MSR_IA32_MCG_CAP);
 	/* need the internal __ version to avoid deadlocks */
-	m->time = __ktime_get_real_seconds();
-	m->cpuvendor = boot_cpu_data.x86_vendor;
-	m->cpuid = cpuid_eax(1);
-	m->socketid = cpu_data(m->extcpu).topo.pkg_id;
-	m->apicid = cpu_data(m->extcpu).topo.initial_apicid;
-	m->mcgcap = __rdmsr(MSR_IA32_MCG_CAP);
-	m->ppin = cpu_data(m->extcpu).ppin;
-	m->microcode = boot_cpu_data.microcode;
+	m->time		= __ktime_get_real_seconds();
+}
+
+void mce_prep_record_per_cpu(unsigned int cpu, struct mce *m)
+{
+	m->cpu		= cpu;
+	m->extcpu	= cpu;
+	m->apicid	= cpu_data(cpu).topo.initial_apicid;
+	m->microcode	= cpu_data(cpu).microcode;
+	m->ppin		= topology_ppin(cpu);
+	m->socketid	= topology_physical_package_id(cpu);
+}
+
+/* Do initial initialization of a struct mce */
+void mce_prep_record(struct mce *m)
+{
+	mce_prep_record_common(m);
+	mce_prep_record_per_cpu(smp_processor_id(), m);
 }
 
 DEFINE_PER_CPU(struct mce, injectm);
diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h
index 01f8f03..43c7f3b 100644
--- a/arch/x86/kernel/cpu/mce/internal.h
+++ b/arch/x86/kernel/cpu/mce/internal.h
@@ -261,6 +261,8 @@ enum mca_msr {
 
 /* Decide whether to add MCE record to MCE event pool or filter it out. */
 extern bool filter_mce(struct mce *m);
+void mce_prep_record_common(struct mce *m);
+void mce_prep_record_per_cpu(unsigned int cpu, struct mce *m);
 
 #ifdef CONFIG_X86_MCE_AMD
 extern bool amd_filter_mce(struct mce *m);

[tip: ras/core] x86/mce: Rename mce_setup() to mce_prep_record()

[tip-bot2 for Yazen Ghannam]

The following commit has been merged into the ras/core branch of tip:

Commit-ID:     5ad21a2497329c2b090d5b02b95394a1316bef53
Gitweb:        https://git.kernel.org/tip/5ad21a2497329c2b090d5b02b95394a1316bef53
Author:        Yazen Ghannam <yazen.ghannam@amd.com>
AuthorDate:    Tue, 30 Jul 2024 13:29:56 -05:00
Committer:     Borislav Petkov (AMD) <bp@alien8.de>
CommitterDate: Thu, 01 Aug 2024 18:20:24 +02:00

x86/mce: Rename mce_setup() to mce_prep_record()

There is no MCE "setup" done in mce_setup(). Rather, this function initializes
and prepares an MCE record.

Rename the function to highlight what it does.

No functional change is intended.

Suggested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/r/20240730182958.4117158-2-yazen.ghannam@amd.com
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
---
 arch/x86/include/asm/mce.h     | 2 +-
 arch/x86/kernel/cpu/mce/amd.c  | 2 +-
 arch/x86/kernel/cpu/mce/apei.c | 4 ++--
 arch/x86/kernel/cpu/mce/core.c | 6 +++---
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 3ad29b1..3b99701 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -221,7 +221,7 @@ static inline int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
 					     u64 lapic_id) { return -EINVAL; }
 #endif
 
-void mce_setup(struct mce *m);
+void mce_prep_record(struct mce *m);
 void mce_log(struct mce *m);
 DECLARE_PER_CPU(struct device *, mce_device);
 
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 9a0133e..14bf8c2 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -780,7 +780,7 @@ static void __log_error(unsigned int bank, u64 status, u64 addr, u64 misc)
 {
 	struct mce m;
 
-	mce_setup(&m);
+	mce_prep_record(&m);
 
 	m.status = status;
 	m.misc   = misc;
diff --git a/arch/x86/kernel/cpu/mce/apei.c b/arch/x86/kernel/cpu/mce/apei.c
index 7f7309f..8f509c8 100644
--- a/arch/x86/kernel/cpu/mce/apei.c
+++ b/arch/x86/kernel/cpu/mce/apei.c
@@ -44,7 +44,7 @@ void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err)
 	else
 		lsb = PAGE_SHIFT;
 
-	mce_setup(&m);
+	mce_prep_record(&m);
 	m.bank = -1;
 	/* Fake a memory read error with unknown channel */
 	m.status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | MCI_STATUS_MISCV | 0x9f;
@@ -97,7 +97,7 @@ int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
 	if (ctx_info->reg_arr_size < 48)
 		return -EINVAL;
 
-	mce_setup(&m);
+	mce_prep_record(&m);
 
 	m.extcpu = -1;
 	m.socketid = -1;
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index b85ec7a..dd5192e 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -118,7 +118,7 @@ static struct irq_work mce_irq_work;
 BLOCKING_NOTIFIER_HEAD(x86_mce_decoder_chain);
 
 /* Do initial initialization of a struct mce */
-void mce_setup(struct mce *m)
+void mce_prep_record(struct mce *m)
 {
 	memset(m, 0, sizeof(struct mce));
 	m->cpu = m->extcpu = smp_processor_id();
@@ -436,11 +436,11 @@ static noinstr void mce_wrmsrl(u32 msr, u64 v)
 static noinstr void mce_gather_info(struct mce *m, struct pt_regs *regs)
 {
 	/*
-	 * Enable instrumentation around mce_setup() which calls external
+	 * Enable instrumentation around mce_prep_record() which calls external
 	 * facilities.
 	 */
 	instrumentation_begin();
-	mce_setup(m);
+	mce_prep_record(m);
 	instrumentation_end();
 
 	m->mcgstatus = mce_rdmsrl(MSR_IA32_MCG_STATUS);

Re: [PATCH v3 0/3] Rework mce_setup()

[Avadhut Naik]

On 7/30/24 13:29, Yazen Ghannam wrote:
> Hi all,
> 
> This revision drops the topology export idea from v2. It seemed to add
> more complexity than just doing a local search. 
> 
> Thanks,
> Yazen
> 
> Link:
> https://lkml.kernel.org/r/20240624212008.663832-1-yazen.ghannam@amd.com
> 
> Yazen Ghannam (3):
>   x86/mce: Rename mce_setup() to mce_prep_record()
>   x86/mce: Define mce_prep_record() helpers for common and per-CPU
>     fields
>   x86/mce: Use mce_prep_record() helpers for
>     apei_smca_report_x86_error()
> 
>  arch/x86/include/asm/mce.h         |  2 +-
>  arch/x86/kernel/cpu/mce/amd.c      |  2 +-
>  arch/x86/kernel/cpu/mce/apei.c     | 18 +++++++-------
>  arch/x86/kernel/cpu/mce/core.c     | 38 ++++++++++++++++++++----------
>  arch/x86/kernel/cpu/mce/internal.h |  2 ++
>  5 files changed, 38 insertions(+), 24 deletions(-)
> 
> 
> base-commit: 1cd27e88888d54de5fefbeb0b44c26194ffa83ce

LGTM.

Reviewed-by: Avadhut Naik <avadhut.naik@amd.com>

-- 
Thanks,
Avadhut Naik