linux

iv/linux

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Vitaly Kuznetsov 3f4a812edf KVM: nSVM: hyper-v: Enable L2 TLB flush

Implement Hyper-V L2 TLB flush for nSVM. The feature needs to be enabled
both in extended 'nested controls' in VMCB and VP assist page.
According to Hyper-V TLFS, synthetic vmexit to L1 is performed with
- HV_SVM_EXITCODE_ENL exit_code.
- HV_SVM_ENL_EXITCODE_TRAP_AFTER_FLUSH exit_info_1.

Note: VP assist page is cached in 'struct kvm_vcpu_hv' so
recalc_intercepts() doesn't need to read from guest's memory. KVM
needs to update the case upon each VMRUN and after svm_set_nested_state
(svm_get_nested_state_pages()) to handle the case when the guest got
migrated while L2 was running.

Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-29-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2022-11-18 12:59:18 -05:00

avic.c

KVM: x86: nSVM: optimize svm_set_x2apic_msr_interception

2022-06-24 12:52:59 -04:00

hyperv.c

KVM: nSVM: hyper-v: Enable L2 TLB flush

2022-11-18 12:59:18 -05:00

hyperv.h

KVM: nSVM: hyper-v: Enable L2 TLB flush

2022-11-18 12:59:18 -05:00

nested.c

KVM: nSVM: hyper-v: Enable L2 TLB flush