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From: tip-bot for Borislav Petkov <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: bp@suse.de, bp@alien8.de, hpa@zytor.com, peterz@infradead.org,
	tglx@linutronix.de, mingo@kernel.org,
	torvalds@linux-foundation.org, linux-edac@vger.kernel.org,
	tony.luck@intel.com, linux-kernel@vger.kernel.org
Subject: [tip:ras/core] x86/mce/AMD: Collect error info even if valid bits are not set
Date: Wed, 21 Feb 2018 09:59:38 -0800	[thread overview]
Message-ID: <tip-4b1e84276a6172980c5bf39aa091ba13e90d6dad@git.kernel.org> (raw)
In-Reply-To: <20180221101900.10326-5-bp@alien8.de>

Commit-ID:  4b1e84276a6172980c5bf39aa091ba13e90d6dad
Gitweb:     https://git.kernel.org/tip/4b1e84276a6172980c5bf39aa091ba13e90d6dad
Author:     Borislav Petkov <bp@suse.de>
AuthorDate: Wed, 21 Feb 2018 11:18:56 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 21 Feb 2018 17:00:54 +0100

x86/mce/AMD: Collect error info even if valid bits are not set

The MCA banks log error info into MCA_ADDR, MCA_MISC0, and MCA_SYND even
if the corresponding valid bits are not set:

"Error handlers should save the values in MCA_ADDR, MCA_MISC0,
and MCA_SYND even if MCA_STATUS[AddrV], MCA_STATUS[MiscV], and
MCA_STATUS[SyndV] are zero."

Do so by setting those bits so that code down the MCE processing path
doesn't need to be changed.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20180221101900.10326-5-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index d7dff23..3c9a25b 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -441,6 +441,20 @@ static inline void mce_gather_info(struct mce *m, struct pt_regs *regs)
 		if (mca_cfg.rip_msr)
 			m->ip = mce_rdmsrl(mca_cfg.rip_msr);
 	}
+
+	/*
+	 * Error handlers should save the values in MCA_ADDR, MCA_MISC0, and
+	 * MCA_SYND even if MCA_STATUS[AddrV], MCA_STATUS[MiscV], and
+	 * MCA_STATUS[SyndV] are zero.
+	 */
+	if (m->cpuvendor == X86_VENDOR_AMD) {
+		u64 status = MCI_STATUS_ADDRV | MCI_STATUS_MISCV;
+
+		if (mce_flags.smca)
+			status |= MCI_STATUS_SYNDV;
+
+		m->status |= status;
+	}
 }
 
 int mce_available(struct cpuinfo_x86 *c)

  reply	other threads:[~2018-02-21 18:00 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-21 10:18 [PATCH 0/8] x86/RAS: Some accumulated stuff Borislav Petkov
2018-02-21 10:18 ` [PATCH 1/8] x86/MCE: Put private structures and definitions into the internal header Borislav Petkov
2018-02-21 11:39   ` Ingo Molnar
2018-02-21 13:28     ` Borislav Petkov
2018-02-21 17:58   ` [tip:ras/core] x86/mce: " tip-bot for Borislav Petkov
2018-02-21 10:18 ` [PATCH 2/8] x86/MCE: Convert mca_config bools to a bitfield Borislav Petkov
2018-02-21 17:58   ` [tip:ras/core] x86/mce: Convert 'struct mca_config' " tip-bot for Borislav Petkov
2018-02-21 10:18 ` [PATCH 3/8] x86/mce: Issue the mcelog --ascii message on !AMD Borislav Petkov
2018-02-21 17:59   ` [tip:ras/core] x86/mce: Issue the 'mcelog --ascii' message only " tip-bot for Borislav Petkov
2018-02-21 10:18 ` [PATCH 4/8] x86/MCE/AMD: Collect error info even if valid bits are not set Borislav Petkov
2018-02-21 17:59   ` tip-bot for Borislav Petkov [this message]
2018-02-21 10:18 ` [PATCH 5/8] x86/MCE/AMD: Pass the bank number to smca_get_bank_type() Borislav Petkov
2018-02-21 18:00   ` [tip:ras/core] x86/mce/AMD: " tip-bot for Yazen Ghannam
2018-02-21 10:18 ` [PATCH 6/8] x86/MCE/AMD, EDAC/mce_amd: Enumerate Reserved SMCA bank type Borislav Petkov
2018-02-21 18:00   ` [tip:ras/core] x86/mce/AMD, " tip-bot for Yazen Ghannam
2018-02-21 10:18 ` [PATCH 7/8] x86/MCE/AMD: Get address from already initialized block Borislav Petkov
2018-02-21 18:01   ` [tip:ras/core] x86/mce/AMD: " tip-bot for Yazen Ghannam
2018-02-21 10:19 ` [PATCH 8/8] x86/MCE/AMD: Carve out SMCA get_block_address() code Borislav Petkov

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