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    SubjectRe: [PATCH v2 0/5] x86: cpuid: improve support for broken CPUID configurations
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    On Thu, 2022-07-28 at 10:30 +0300, Maxim Levitsky wrote:
    > On Mon, 2022-07-18 at 17:11 +0300, Maxim Levitsky wrote:
    > > This patch series aims to harden the cpuid code against the case when
    > > the hypervisor exposes a broken CPUID configuration to the guest,
    > > in the form of having a feature disabled but not features that depend on it.
    > >
    > > This is the more generic way to fix kernel panic in aes-ni kernel driver,
    > > which was triggered by CPUID configuration in which AVX is disabled but
    > > not AVX2.
    > >
    > > https://lore.kernel.org/all/20211103145231.GA4485@gondor.apana.org.au/T/
    > >
    > > This was tested by booting a guest with AVX disabled and not AVX2,
    > > and observing that both a warning is now printed in dmesg, and
    > > that avx2 is gone from /proc/cpuinfo.
    > >
    > > V2:
    > >
    > > I hopefully addressed all the (very good) review feedback.
    > >
    > > Best regards,
    > > Maxim Levitsky
    > >
    > > Maxim Levitsky (5):
    > > perf/x86/intel/lbr: use setup_clear_cpu_cap instead of clear_cpu_cap
    > > x86/cpuid: refactor setup_clear_cpu_cap()/clear_cpu_cap()
    > > x86/cpuid: move filter_cpuid_features to cpuid-deps.c
    > > x86/cpuid: remove 'warn' parameter from filter_cpuid_features
    > > x86/cpuid: check for dependencies violations in CPUID and attempt to
    > > fix them
    > >
    > > arch/x86/events/intel/lbr.c | 2 +-
    > > arch/x86/include/asm/cpufeature.h | 1 +
    > > arch/x86/kernel/cpu/common.c | 51 +-------------------
    > > arch/x86/kernel/cpu/cpuid-deps.c | 80 +++++++++++++++++++++++++++----
    > > 4 files changed, 74 insertions(+), 60 deletions(-)
    > >
    > > --
    > > 2.34.3
    > >
    > >
    > A very kind ping on these patches.

    Another kind ping on these patches.


    Best regards,
    Maxim Levitsky
    >
    > Best regards,
    > Maxim Levitsky


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