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home:dirkmueller:acdc:as_python3_module
xen.16818
5f21b9fd-x86-cpuid-APIC-bit-clearing.patch
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File 5f21b9fd-x86-cpuid-APIC-bit-clearing.patch of Package xen.16818
# Commit 64219fa179c3e48adad12bfce3f6b3f1596cccbf # Date 2020-07-29 19:03:41 +0100 # Author Fam Zheng <famzheng@amazon.com> # Committer Andrew Cooper <andrew.cooper3@citrix.com> x86/cpuid: Fix APIC bit clearing The bug is obvious here, other places in this function used "cpufeat_mask" correctly. Fixed: b648feff8ea2 ("xen/x86: Improvements to in-hypervisor cpuid sanity checks") Signed-off-by: Fam Zheng <famzheng@amazon.com> Reviewed-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/arch/x86/cpuid.c +++ b/xen/arch/x86/cpuid.c @@ -961,7 +961,7 @@ void guest_cpuid(const struct vcpu *v, u { /* Fast-forward MSR_APIC_BASE.EN. */ if ( vlapic_hw_disabled(vcpu_vlapic(v)) ) - res->d &= ~cpufeat_bit(X86_FEATURE_APIC); + res->d &= ~cpufeat_mask(X86_FEATURE_APIC); /* * PSE36 is not supported in shadow mode. This bit should be
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