From 3c9eb0655fc03fb5e84f1db334ebc832d9c5ac31 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Tue, 1 Nov 2022 15:54:00 +0100 Subject: KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() 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 Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20221101145426.251680-23-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/hyperv.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'arch/x86/kvm/hyperv.h') diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index 8942e8c6c912..5f9c76b45f46 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -177,6 +177,23 @@ static inline void kvm_hv_vcpu_purge_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); +} + int kvm_hv_vcpu_flush_tlb(struct kvm_vcpu *vcpu); #endif -- cgit v1.2.3