From: Smita Koralahalli Date: Thu, 4 Nov 2021 21:58:42 +0000 (-0500) Subject: x86/mce/inject: Set the valid bit in MCA_STATUS before error injection X-Git-Tag: v5.17-rc1~181^2~17 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1e56279a49168f24b2b58e843ae92976f90a98a6;p=thirdparty%2Flinux.git x86/mce/inject: Set the valid bit in MCA_STATUS before error injection MCA handlers check the valid bit in each status register (MCA_STATUS[Val]) and continue processing the error only if the valid bit is set. Set the valid bit unconditionally in the corresponding MCA_STATUS register and correct any Val=0 injections made by the user as such errors will get ignored and such injections will be largely pointless. Signed-off-by: Smita Koralahalli Signed-off-by: Borislav Petkov Link: https://lore.kernel.org/r/20211104215846.254012-3-Smita.KoralahalliChannabasappa@amd.com --- diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c index 725e8e4331a92..6eac840c64bbb 100644 --- a/arch/x86/kernel/cpu/mce/inject.c +++ b/arch/x86/kernel/cpu/mce/inject.c @@ -503,6 +503,8 @@ static void do_inject(void) i_mce.tsc = rdtsc_ordered(); + i_mce.status |= MCI_STATUS_VAL; + if (i_mce.misc) i_mce.status |= MCI_STATUS_MISCV;