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# 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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