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From: Ganesh Goudar <ganeshgr@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au
Cc: mikey@neuling.org, Ganesh Goudar <ganeshgr@linux.ibm.com>,
	mahesh@linux.ibm.com, npiggin@gmail.com
Subject: [PATCH v2 1/3] powerpc/pseries: Parse control memory access error
Date: Thu,  5 Aug 2021 14:50:23 +0530	[thread overview]
Message-ID: <20210805092025.272871-1-ganeshgr@linux.ibm.com> (raw)

Add support to parse and log control memory access
error for pseries.

Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
---
v2: No changes in this patch.
---
 arch/powerpc/platforms/pseries/ras.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 167f2e1b8d39..608c35cad0c3 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -80,6 +80,7 @@ struct pseries_mc_errorlog {
 #define MC_ERROR_TYPE_TLB		0x04
 #define MC_ERROR_TYPE_D_CACHE		0x05
 #define MC_ERROR_TYPE_I_CACHE		0x07
+#define MC_ERROR_TYPE_CTRL_MEM_ACCESS	0x08
 
 /* RTAS pseries MCE error sub types */
 #define MC_ERROR_UE_INDETERMINATE		0
@@ -103,6 +104,9 @@ struct pseries_mc_errorlog {
 #define MC_ERROR_TLB_MULTIHIT		2
 #define MC_ERROR_TLB_INDETERMINATE	3
 
+#define MC_ERROR_CTRL_MEM_ACCESS_PTABLE_WALK	0
+#define MC_ERROR_CTRL_MEM_ACCESS_OP_ACCESS	1
+
 static inline u8 rtas_mc_error_sub_type(const struct pseries_mc_errorlog *mlog)
 {
 	switch (mlog->error_type) {
@@ -112,6 +116,8 @@ static inline u8 rtas_mc_error_sub_type(const struct pseries_mc_errorlog *mlog)
 	case	MC_ERROR_TYPE_ERAT:
 	case	MC_ERROR_TYPE_TLB:
 		return (mlog->sub_err_type & 0x03);
+	case	MC_ERROR_TYPE_CTRL_MEM_ACCESS:
+		return (mlog->sub_err_type & 0x70) >> 4;
 	default:
 		return 0;
 	}
@@ -699,6 +705,21 @@ static int mce_handle_err_virtmode(struct pt_regs *regs,
 	case MC_ERROR_TYPE_I_CACHE:
 		mce_err.error_type = MCE_ERROR_TYPE_ICACHE;
 		break;
+	case MC_ERROR_TYPE_CTRL_MEM_ACCESS:
+		mce_err.error_type = MCE_ERROR_TYPE_RA;
+		if (mce_log->sub_err_type & 0x80)
+			eaddr = be64_to_cpu(mce_log->effective_address);
+		switch (err_sub_type) {
+		case MC_ERROR_CTRL_MEM_ACCESS_PTABLE_WALK:
+			mce_err.u.ra_error_type =
+				MCE_RA_ERROR_PAGE_TABLE_WALK_LOAD_STORE_FOREIGN;
+			break;
+		case MC_ERROR_CTRL_MEM_ACCESS_OP_ACCESS:
+			mce_err.u.ra_error_type =
+				MCE_RA_ERROR_LOAD_STORE_FOREIGN;
+			break;
+		}
+		break;
 	case MC_ERROR_TYPE_UNKNOWN:
 	default:
 		mce_err.error_type = MCE_ERROR_TYPE_UNKNOWN;
-- 
2.31.1


             reply	other threads:[~2021-08-05  9:21 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-05  9:20 Ganesh Goudar [this message]
2021-08-05  9:20 ` [PATCH v2 2/3] selftests/powerpc: Add test for real address error handling Ganesh Goudar
2021-08-24 12:48   ` Michael Ellerman
2021-08-25 11:31     ` Ganesh
2021-08-26  3:27       ` Michael Ellerman
2021-08-26 12:57         ` Ganesh
2021-08-05  9:20 ` [PATCH v2 3/3] powerpc/mce: Modify the real address error logging messages Ganesh Goudar
2021-08-23 18:53 ` [PATCH v2 1/3] powerpc/pseries: Parse control memory access error Ganesh
2021-08-24  6:39 ` Michael Ellerman
2021-08-24 21:24   ` Segher Boessenkool
2021-08-25 11:36     ` Ganesh
2021-08-25 14:47       ` Segher Boessenkool
2021-08-25 11:03   ` Ganesh
2021-08-26  2:36     ` Michael Ellerman

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