Messages in this thread Patch in this message | | | Date | Thu, 18 Aug 2022 12:08:24 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH v2] x86/bugs: Add "unknown" reporting for MMIO Stale Data |
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On Wed, Aug 03, 2022 at 02:41:32PM -0700, Pawan Gupta wrote: > diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c > index 6761668100b9..fe3f7e762b80 100644 > --- a/arch/x86/kernel/cpu/bugs.c > +++ b/arch/x86/kernel/cpu/bugs.c > @@ -433,7 +433,8 @@ static void __init mmio_select_mitigation(void) > u64 ia32_cap; > > if (!boot_cpu_has_bug(X86_BUG_MMIO_STALE_DATA) || > - cpu_mitigations_off()) { > + boot_cpu_has_bug(X86_BUG_MMIO_UNKNOWN) || > + cpu_mitigations_off()) { > mmio_mitigation = MMIO_MITIGATION_OFF; > return; > }
Needs also:
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index d08c5589fa59..da7c361f47e0 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -539,6 +539,8 @@ static void __init md_clear_update_mitigation(void) pr_info("TAA: %s\n", taa_strings[taa_mitigation]); if (boot_cpu_has_bug(X86_BUG_MMIO_STALE_DATA)) pr_info("MMIO Stale Data: %s\n", mmio_strings[mmio_mitigation]); + else if (boot_cpu_has_bug(X86_BUG_MMIO_UNKNOWN)) + pr_info("MMIO Stale Data: Unknown: No mitigations\n"); } static void __init md_clear_select_mitigation(void) I've added it.
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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