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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2022-05-25 13:59:45 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-05-25 21:26:35 +0200 |
| commit | 869840d26c929b99694e31b1a18e83bdea6e97ca (patch) | |
| tree | 8d3be5755ce10f0b75bce56d99aa09de39dd6ca1 /target/i386/kvm/kvm.c | |
| parent | 7110fe56c1f69b9e1bdf838558fdcb75d1568964 (diff) | |
| download | focaccia-qemu-869840d26c929b99694e31b1a18e83bdea6e97ca.tar.gz focaccia-qemu-869840d26c929b99694e31b1a18e83bdea6e97ca.zip | |
i386: Hyper-V Enlightened MSR bitmap feature
The newly introduced enlightenment allow L0 (KVM) and L1 (Hyper-V) hypervisors to collaborate to avoid unnecessary updates to L2 MSR-Bitmap upon vmexits. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20220525115949.1294004-3-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/kvm/kvm.c')
| -rw-r--r-- | target/i386/kvm/kvm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 38af0e4f04..f389bbedf2 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -973,6 +973,13 @@ static struct { .dependencies = BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_RELAXED) }, #endif + [HYPERV_FEAT_MSR_BITMAP] = { + .desc = "enlightened MSR-Bitmap (hv-emsr-bitmap)", + .flags = { + {.func = HV_CPUID_NESTED_FEATURES, .reg = R_EAX, + .bits = HV_NESTED_MSR_BITMAP} + } + }, }; static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, |