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KVM: TDX: Add methods to ignore VMX preemption timer

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

Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Message-ID: <20250227012021.1778144-15-binbin.wu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Isaku Yamahata 2025-02-27 09:20:15 +08:00 committed by Paolo Bonzini
parent e6bb397884
commit a946c71cf8
1 changed files with 23 additions and 2 deletions
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25
arch/x86/kvm/vmx/main.c
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@ -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,