[PATCH AUTOSEL 4.19 074/191] x86/mce-inject: Reset injection struct after injection

Sasha Levin
2019-11-10T02:42:47Z

From: Borislav Petkov <bp@suse.de>

[ Upstream commit 7401a633c34adc7aefd3edfec60074cb0475a3e8 ]

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@suse.de>
Link: https://lkml.kernel.org/r/20180905081954.10391-1-bp@alien8.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 ff1c00b695aed..1ceccc4a5472c 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-inject.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-inject.c
@@ -106,6 +106,9 @@ 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. */
@@ -580,6 +583,9 @@ static int inj_bank_set(void *data, u64 val)
m->bank = val;
do_inject();

+ /* Reset injection struct */
+ setup_inj_struct(&i_mce);
+
return 0;
}

--
2.20.1