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KVM: X86: Introduce kvm_get_msr_feature()

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commit 66421c1ec340096b291af763ed5721314cdd9c5c upstream

Introduce kvm_get_msr_feature() to handle the msrs which are supported
by different vendors and sharing the same emulation logic.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Liran Alon <liran.alon@oracle.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wanpeng Li 2018-02-28 14:03:30 +08:00 committed by Greg Kroah-Hartman
parent 52613b7abb
commit 6181db2838
1 changed files with 15 additions and 3 deletions
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18
arch/x86/kvm/x86.c
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@ -1052,13 +1052,25 @@ static u32 msr_based_features[] = {
static unsigned int num_msr_based_features;
static int kvm_get_msr_feature(struct kvm_msr_entry *msr)
{
switch (msr->index) {
default:
if (kvm_x86_ops->get_msr_feature(msr))
return 1;
}
return 0;
}
static int do_get_msr_feature(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
{
struct kvm_msr_entry msr;
int r;
msr.index = index;
if (kvm_x86_ops->get_msr_feature(&msr))
return 1;
r = kvm_get_msr_feature(&msr);
if (r)
return r;
*data = msr.data;
@ -4392,7 +4404,7 @@ static void kvm_init_msr_list(void)
struct kvm_msr_entry msr;
msr.index = msr_based_features[i];
if (kvm_x86_ops->get_msr_feature(&msr))
if (kvm_get_msr_feature(&msr))
continue;
if (j < i)