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[PATCH] x86/cpuid: Fix APIC bit clearing
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: fam@xxxxxxxxxx
- Date: Wed, 29 Jul 2020 17:33:41 +0100
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- Cc: fam@xxxxxxxxxx, Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, famzheng@xxxxxxxxxx, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 30 Jul 2020 04:09:49 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
From: Fam Zheng <famzheng@xxxxxxxxxx>
The bug is obvious here, other places in this function used
"cpufeat_mask" correctly.
Signed-off-by: Fam Zheng <famzheng@xxxxxxxxxx>
Fixes: 46df8a65 ("x86/cpuid: Effectively remove pv_cpuid() and hvm_cpuid()")
---
xen/arch/x86/cpuid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/x86/cpuid.c b/xen/arch/x86/cpuid.c
index 6a4a787b68..63a03ef1e5 100644
--- a/xen/arch/x86/cpuid.c
+++ b/xen/arch/x86/cpuid.c
@@ -1057,7 +1057,7 @@ void guest_cpuid(const struct vcpu *v, uint32_t leaf,
{
/* 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
--
2.17.1
|