diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2022-11-01 15:54:06 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-18 12:59:18 -0500 |
| commit | 3f4a812edf5cb0a50e65fbdfafdb3e688da18f16 (patch) | |
| tree | 2768590a78f023064ee3a3f8abdd640c7eb061c7 /arch/x86/kvm/hyperv.h | |
| parent | b415d8d417bbe5403626b74e1041101ac23d602f (diff) | |
| download | linux-3f4a812edf5cb0a50e65fbdfafdb3e688da18f16.tar.bz2 | |
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>
Diffstat (limited to 'arch/x86/kvm/hyperv.h')
| -rw-r--r-- | arch/x86/kvm/hyperv.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index 5157622c2fb3..9f96414a31c5 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -198,6 +198,17 @@ static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu) code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX); } +static inline int kvm_hv_verify_vp_assist(struct kvm_vcpu *vcpu) +{ + if (!to_hv_vcpu(vcpu)) + return 0; + + if (!kvm_hv_assist_page_enabled(vcpu)) + return 0; + + return kvm_hv_get_assist_page(vcpu); +} + int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu); #endif |