Merge tag 'ras_core_for_v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull RAS updates from Borislav Petkov:

 - Log and handle twp new AMD-specific MCA registers: SYND1 and SYND2
   and report the Field Replaceable Unit text info reported through them

 - Add support for handling variable-sized SMCA BERT records

 - Add the capability for reporting vendor-specific RAS error info
   without adding vendor-specific fields to struct mce

 - Cleanups

* tag 'ras_core_for_v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  EDAC/mce_amd: Add support for FRU text in MCA
  x86/mce/apei: Handle variable SMCA BERT record size
  x86/MCE/AMD: Add support for new MCA_SYND{1,2} registers
  tracing: Add __print_dynamic_array() helper
  x86/mce: Add wrapper for struct mce to export vendor specific info
  x86/mce/intel: Use MCG_BANKCNT_MASK instead of 0xff
  x86/mce/mcelog: Use xchg() to get and clear the flags

2 files changed, 36 insertions, 3 deletions

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 3b9970117a0f..4543cf2eb5e8 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -61,6 +61,7 @@
  *  - TCC bit is present in MCx_STATUS.
  */
 #define MCI_CONFIG_MCAX		0x1
+#define MCI_CONFIG_FRUTEXT	BIT_ULL(9)
 #define MCI_IPID_MCATYPE	0xFFFF0000
 #define MCI_IPID_HWID		0xFFF
 
@@ -122,6 +123,9 @@
 #define MSR_AMD64_SMCA_MC0_DESTAT	0xc0002008
 #define MSR_AMD64_SMCA_MC0_DEADDR	0xc0002009
 #define MSR_AMD64_SMCA_MC0_MISC1	0xc000200a
+/* Registers MISC2 to MISC4 are at offsets B to D. */
+#define MSR_AMD64_SMCA_MC0_SYND1	0xc000200e
+#define MSR_AMD64_SMCA_MC0_SYND2	0xc000200f
 #define MSR_AMD64_SMCA_MCx_CTL(x)	(MSR_AMD64_SMCA_MC0_CTL + 0x10*(x))
 #define MSR_AMD64_SMCA_MCx_STATUS(x)	(MSR_AMD64_SMCA_MC0_STATUS + 0x10*(x))
 #define MSR_AMD64_SMCA_MCx_ADDR(x)	(MSR_AMD64_SMCA_MC0_ADDR + 0x10*(x))
@@ -132,6 +136,8 @@
 #define MSR_AMD64_SMCA_MCx_DESTAT(x)	(MSR_AMD64_SMCA_MC0_DESTAT + 0x10*(x))
 #define MSR_AMD64_SMCA_MCx_DEADDR(x)	(MSR_AMD64_SMCA_MC0_DEADDR + 0x10*(x))
 #define MSR_AMD64_SMCA_MCx_MISCy(x, y)	((MSR_AMD64_SMCA_MC0_MISC1 + y) + (0x10*(x)))
+#define MSR_AMD64_SMCA_MCx_SYND1(x)	(MSR_AMD64_SMCA_MC0_SYND1 + 0x10*(x))
+#define MSR_AMD64_SMCA_MCx_SYND2(x)	(MSR_AMD64_SMCA_MC0_SYND2 + 0x10*(x))
 
 #define XEC(x, mask)			(((x) >> 16) & mask)
 
@@ -187,6 +193,32 @@ enum mce_notifier_prios {
 	MCE_PRIO_HIGHEST = MCE_PRIO_CEC
 };
 
+/**
+ * struct mce_hw_err - Hardware Error Record.
+ * @m:		Machine Check record.
+ * @vendor:	Vendor-specific error information.
+ *
+ * Vendor-specific fields should not be added to struct mce. Instead, vendors
+ * should export their vendor-specific data through their structure in the
+ * vendor union below.
+ *
+ * AMD's vendor data is parsed by error decoding tools for supplemental error
+ * information. Thus, current offsets of existing fields must be maintained.
+ * Only add new fields at the end of AMD's vendor structure.
+ */
+struct mce_hw_err {
+	struct mce m;
+
+	union vendor_info {
+		struct {
+			u64 synd1;		/* MCA_SYND1 MSR */
+			u64 synd2;		/* MCA_SYND2 MSR */
+		} amd;
+	} vendor;
+};
+
+#define	to_mce_hw_err(mce) container_of(mce, struct mce_hw_err, m)
+
 struct notifier_block;
 extern void mce_register_decode_chain(struct notifier_block *nb);
 extern void mce_unregister_decode_chain(struct notifier_block *nb);
@@ -221,8 +253,8 @@ static inline int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info,
 					     u64 lapic_id) { return -EINVAL; }
 #endif
 
-void mce_prep_record(struct mce *m);
-void mce_log(struct mce *m);
+void mce_prep_record(struct mce_hw_err *err);
+void mce_log(struct mce_hw_err *err);
 DECLARE_PER_CPU(struct device *, mce_device);
 
 /* Maximum number of MCA banks per CPU. */
diff --git a/arch/x86/include/uapi/asm/mce.h b/arch/x86/include/uapi/asm/mce.h
index db9adc081c5a..cb6b48a7c22b 100644
--- a/arch/x86/include/uapi/asm/mce.h
+++ b/arch/x86/include/uapi/asm/mce.h
@@ -8,7 +8,8 @@
 /*
  * Fields are zero when not available. Also, this struct is shared with
  * userspace mcelog and thus must keep existing fields at current offsets.
- * Only add new fields to the end of the structure
+ * Only add new, shared fields to the end of the structure.
+ * Do not add vendor-specific fields.
  */
 struct mce {
 	__u64 status;		/* Bank's MCi_STATUS MSR */