Messages in this thread Patch in this message | | | From | Vitaly Kuznetsov <> | Subject | [PATCH v4 16/37] KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() | Date | Wed, 25 May 2022 11:01:12 +0200 |
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The newly introduced helper checks whether vCPU is performing a Hyper-V TLB flush hypercall. This is required to filter out L2 TLB flush hypercalls for processing.
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- arch/x86/kvm/hyperv.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index aaced3768954..10c5aaa99f9f 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -171,6 +171,24 @@ static inline void kvm_hv_vcpu_empty_flush_tlb(struct kvm_vcpu *vcpu) kfifo_reset_out(&tlb_flush_fifo->entries); } + +static inline bool kvm_hv_is_tlb_flush_hcall(struct kvm_vcpu *vcpu) +{ + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + u16 code; + + if (!hv_vcpu) + return false; + + code = is_64_bit_hypercall(vcpu) ? kvm_rcx_read(vcpu) : + kvm_rax_read(vcpu); + + return (code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE || + code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST || + code == HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX || + code == HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX); +} + void kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu); -- 2.35.3
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