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[PATCH 1/2] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not a
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From: |
Xiaoyao Li |
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Subject: |
[PATCH 1/2] i386/cpu: Clear FEAT_XSAVE_COMP_{LO, HI} when XSAVE is not available |
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Date: |
Thu, 16 Jul 2020 16:20:18 +0800 |
Per Intel SDM vol 1, 13.2, if CPUID.1:ECX.XSAVE[bit 26] is 0, the
processor provides no further enumeration through CPUID function 0DH.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
target/i386/cpu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 1e5123251d74..f5f11603e805 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6261,6 +6261,8 @@ static void x86_cpu_enable_xsave_components(X86CPU *cpu)
uint64_t mask;
if (!(env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE)) {
+ env->features[FEAT_XSAVE_COMP_LO] = 0;
+ env->features[FEAT_XSAVE_COMP_HI] = 0;
return;
}
--
2.18.4