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hv: xsave: remove is_xsave_supported

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Update X86_FEATURE_OSXSAVE when enabled and replace is_xsave_supported
with cpu_has_cap(X86_FEATURE_OSXSAVE).

Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Li, Fei1
2018-04-09 10:20:03 +08:00
committed by Jack Ren
parent 6560ff367c
commit d7d2ef8c88
4 changed files with 12 additions and 15 deletions
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22
hypervisor/arch/x86/cpu.c
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@@ -761,18 +761,6 @@ bool is_vapic_virt_reg_supported(void)
return ((cpu_caps.vapic_features & VAPIC_FEATURE_VIRT_REG) != 0);
}
bool is_xsave_supported(void)
{
/*
*todo:
*below flag also should be tested, but current it will be false
*as it is not updated after turning on the host's CR4.OSXSAVE bit,
*will be fixed in cpuid related patch.
*boot_cpu_data.cpuid_leaves[FEAT_1_ECX] & CPUID_ECX_OSXSAVE
**/
return !!(boot_cpu_data.cpuid_leaves[FEAT_1_ECX] & CPUID_ECX_XSAVE);
}
static void cpu_xsave_init(void)
{
uint64_t val64;
@@ -781,5 +769,15 @@ static void cpu_xsave_init(void)
CPU_CR_READ(cr4, &val64);
val64 |= CR4_OSXSAVE;
CPU_CR_WRITE(cr4, val64);
if (get_cpu_id() == CPU_BOOT_ID) {
uint32_t ecx, unused;
cpuid(CPUID_FEATURES, &unused, &unused, &ecx, &unused);
/* if set, update it */
if (ecx & CPUID_ECX_OSXSAVE)
boot_cpu_data.cpuid_leaves[FEAT_1_ECX] |=
CPUID_ECX_OSXSAVE;
}
}
}