Commit cd9a491f authored by Liran Alon's avatar Liran Alon Committed by Radim Krčmář
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KVM: nVMX: Emulate L1 individual-address invvpid by L0 individual-address invvpid 



When vmcs12 uses VPID, all TLB entries populated by L2 are tagged with
vmx->nested.vpid02. Currently, INVVPID executed by L1 is emulated by L0
by using INVVPID single/global-context to flush all TLB entries
tagged with vmx->nested.vpid02 regardless of INVVPID type executed by
L1.

However, we can easily optimize the case of L1 INVVPID on an
individual-address. Just INVVPID given individual-address tagged with
vmx->nested.vpid02.

Reviewed-by: default avatarLiam Merwick <liam.merwick@oracle.com>
Signed-off-by: default avatarLiran Alon <liran.alon@oracle.com>
Reviewed-by: default avatarJim Mattson <jmattson@google.com>
[Squashed with a preparatory patch that added the !operand.vpid line.]
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
parent 6f1e03bc

arch/x86/kvm/vmx.c

+16 −3
Original line number Diff line number Diff line
@@ -1572,6 +1572,11 @@ static inline bool cpu_has_vmx_invept_global(void) 
	return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;

}



static inline bool cpu_has_vmx_invvpid_individual_addr(void)

{

	return vmx_capability.vpid & VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT;

}



static inline bool cpu_has_vmx_invvpid_single(void)

{

	return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
@@ -8513,12 +8518,19 @@ static int handle_invvpid(struct kvm_vcpu *vcpu) 


	switch (type) {

	case VMX_VPID_EXTENT_INDIVIDUAL_ADDR:

		if (is_noncanonical_address(operand.gla, vcpu)) {

		if (!operand.vpid ||

		    is_noncanonical_address(operand.gla, vcpu)) {

			nested_vmx_failValid(vcpu,

				VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);

			return kvm_skip_emulated_instruction(vcpu);

		}

		/* fall through */

		if (cpu_has_vmx_invvpid_individual_addr() &&

		    vmx->nested.vpid02) {

			__invvpid(VMX_VPID_EXTENT_INDIVIDUAL_ADDR,

				vmx->nested.vpid02, operand.gla);

		} else

			__vmx_flush_tlb(vcpu, vmx->nested.vpid02, true);

		break;

	case VMX_VPID_EXTENT_SINGLE_CONTEXT:

	case VMX_VPID_EXTENT_SINGLE_NON_GLOBAL:

		if (!operand.vpid) {
@@ -8526,15 +8538,16 @@ static int handle_invvpid(struct kvm_vcpu *vcpu) 
				VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);

			return kvm_skip_emulated_instruction(vcpu);

		}

		__vmx_flush_tlb(vcpu, vmx->nested.vpid02, true);

		break;

	case VMX_VPID_EXTENT_ALL_CONTEXT:

		__vmx_flush_tlb(vcpu, vmx->nested.vpid02, true);

		break;

	default:

		WARN_ON_ONCE(1);

		return kvm_skip_emulated_instruction(vcpu);

	}



	__vmx_flush_tlb(vcpu, vmx->nested.vpid02, true);

	nested_vmx_succeed(vcpu);



	return kvm_skip_emulated_instruction(vcpu);

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