diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2022-05-25 13:59:46 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-05-25 21:26:35 +0200 |
| commit | 9411e8b6faeb1d88d4441c63c5ec072a01b2914e (patch) | |
| tree | f39a3fc11ab54da650ce39bc4508ac8bcdbb9dd3 /target/i386/kvm/kvm.c | |
| parent | 869840d26c929b99694e31b1a18e83bdea6e97ca (diff) | |
i386: Hyper-V XMM fast hypercall input feature
Hyper-V specification allows to pass parameters for certain hypercalls
using XMM registers ("XMM Fast Hypercall Input"). When the feature is
in use, it allows for faster hypercalls processing as KVM can avoid
reading guest's memory.
KVM supports the feature since v5.14.
Rename HV_HYPERCALL_{PARAMS_XMM_AVAILABLE -> XMM_INPUT_AVAILABLE} to
comply with KVM.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220525115949.1294004-4-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 f389bbedf2..7e6f934eda 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -980,6 +980,13 @@ static struct { .bits = HV_NESTED_MSR_BITMAP} } }, + [HYPERV_FEAT_XMM_INPUT] = { + .desc = "XMM fast hypercall input (hv-xmm-input)", + .flags = { + {.func = HV_CPUID_FEATURES, .reg = R_EDX, + .bits = HV_HYPERCALL_XMM_INPUT_AVAILABLE} + } + }, }; static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, |