linux-kernel - [tip:ras/core] x86/mce-inject: Reset injection struct after injection

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Message-ID: <tip-7401a633c34adc7aefd3edfec60074cb0475a3e8@git.kernel.org>
Date:   Fri, 21 Sep 2018 05:33:50 -0700
From:   tip-bot for Borislav Petkov <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, hpa@...or.com, bp@...e.de,
        linux-kernel@...r.kernel.org, mingo@...nel.org
Subject: [tip:ras/core] x86/mce-inject: Reset injection struct after
 injection

Commit-ID:  7401a633c34adc7aefd3edfec60074cb0475a3e8
Gitweb:     https://git.kernel.org/tip/7401a633c34adc7aefd3edfec60074cb0475a3e8
Author:     Borislav Petkov <bp@...e.de>
AuthorDate: Tue, 4 Sep 2018 11:22:12 +0200
Committer:  Borislav Petkov <bp@...e.de>
CommitDate: Fri, 21 Sep 2018 14:28:37 +0200

x86/mce-inject: Reset injection struct after injection

Clear the MCE struct which is used for collecting the injection details
after injection.

Also, populate it with more details from the machine.

Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20180905081954.10391-1-bp@alien8.de
---
 arch/x86/kernel/cpu/mcheck/mce-inject.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce-inject.c b/arch/x86/kernel/cpu/mcheck/mce-inject.c
index c805a06e14c3..1fc424c40a31 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -108,6 +108,9 @@ static void setup_inj_struct(struct mce *m)
 	memset(m, 0, sizeof(struct mce));
 
 	m->cpuvendor = boot_cpu_data.x86_vendor;
+	m->time	     = ktime_get_real_seconds();
+	m->cpuid     = cpuid_eax(1);
+	m->microcode = boot_cpu_data.microcode;
 }
 
 /* Update fake mce registers on current CPU. */
@@ -576,6 +579,9 @@ static int inj_bank_set(void *data, u64 val)
 	m->bank = val;
 	do_inject();
 
+	/* Reset injection struct */
+	setup_inj_struct(&i_mce);
+
 	return 0;
 }