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target/i386: work around KVM_GET_MSRS bug for secondary execution controls 

Some secondary controls are automatically enabled/disabled based on the CPUID
values that are set for the guest.  However, they are still available at a
global level and therefore should be present when KVM_GET_MSRS is sent to
/dev/kvm.

Unfortunately KVM forgot to include those, so fix that.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
stable-4.2
Paolo Bonzini 2019-07-02 14:58:48 +02:00
parent 20a78b02d3
commit 048c95163b
1 changed files with 17 additions and 0 deletions
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17
target/i386/kvm.c
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@ -479,6 +479,23 @@ uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index)
value = msr_data.entries[0].data;
switch (index) {
case MSR_IA32_VMX_PROCBASED_CTLS2:
/* KVM forgot to add these bits for some time, do this ourselves. */
if (kvm_arch_get_supported_cpuid(s, 0xD, 1, R_ECX) & CPUID_XSAVE_XSAVES) {
value |= (uint64_t)VMX_SECONDARY_EXEC_XSAVES << 32;
}
if (kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX) & CPUID_EXT_RDRAND) {
value |= (uint64_t)VMX_SECONDARY_EXEC_RDRAND_EXITING << 32;
}
if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & CPUID_7_0_EBX_INVPCID) {
value |= (uint64_t)VMX_SECONDARY_EXEC_ENABLE_INVPCID << 32;
}
if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & CPUID_7_0_EBX_RDSEED) {
value |= (uint64_t)VMX_SECONDARY_EXEC_RDSEED_EXITING << 32;
}
if (kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX) & CPUID_EXT2_RDTSCP) {
value |= (uint64_t)VMX_SECONDARY_EXEC_RDTSCP << 32;
}
/* fall through */
case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
case MSR_IA32_VMX_TRUE_ENTRY_CTLS: