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@xxxxxxxxxx>
Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
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 ca7f1d2c134e..d16f62e4f43a 100644
--- a/arch/x86/kvm/hyperv.h
+++ b/arch/x86/kvm/hyperv.h
@@ -176,6 +176,24 @@ 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);
--
2.37.3
