Commit a946c71c authored by Isaku Yamahata's avatar Isaku Yamahata Committed by Paolo Bonzini
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KVM: TDX: Add methods to ignore VMX preemption timer 



TDX doesn't support VMX preemption timer.  Implement access methods for VMM
to ignore VMX preemption timer.

Signed-off-by: default avatarIsaku Yamahata <isaku.yamahata@intel.com>
Signed-off-by: default avatarBinbin Wu <binbin.wu@linux.intel.com>
Message-ID: <20250227012021.1778144-15-binbin.wu@linux.intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent e6bb3978

arch/x86/kvm/vmx/main.c

+23 −2
Original line number Diff line number Diff line
@@ -786,6 +786,27 @@ static int vt_set_identity_map_addr(struct kvm *kvm, u64 ident_addr) 
	return vmx_set_identity_map_addr(kvm, ident_addr);

}



#ifdef CONFIG_X86_64

static int vt_set_hv_timer(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc,

			      bool *expired)

{

	/* VMX-preemption timer isn't available for TDX. */

	if (is_td_vcpu(vcpu))

		return -EINVAL;



	return vmx_set_hv_timer(vcpu, guest_deadline_tsc, expired);

}



static void vt_cancel_hv_timer(struct kvm_vcpu *vcpu)

{

	/* VMX-preemption timer can't be set.  See vt_set_hv_timer(). */

	if (is_td_vcpu(vcpu))

		return;



	vmx_cancel_hv_timer(vcpu);

}

#endif



static int vt_mem_enc_ioctl(struct kvm *kvm, void __user *argp)

{

	if (!is_td(kvm))
@@ -941,8 +962,8 @@ struct kvm_x86_ops vt_x86_ops __initdata = { 
	.pi_start_assignment = vmx_pi_start_assignment,



#ifdef CONFIG_X86_64

	.set_hv_timer = vmx_set_hv_timer,

	.cancel_hv_timer = vmx_cancel_hv_timer,

	.set_hv_timer = vt_set_hv_timer,

	.cancel_hv_timer = vt_cancel_hv_timer,

#endif



	.setup_mce = vmx_setup_mce,