From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> Disable PI wakeup for IPI virtualization (IPIv) case for TDX. When a vCPU is being scheduled out, notification vector is switched and pi_wakeup_handler() is enabled when the vCPU has interrupt enabled and posted interrupt is used to wake up the vCPU. For VMX, a blocked vCPU can be the target of posted interrupts when using IPIv or VT-d PI. TDX doesn't support IPIv, disable PI wakeup for IPIv. Also, since the guest status of TD vCPU is protected, assume interrupt is always enabled for TD. (PV HLT hypercall is not support yet, TDX guest tells VMM whether HLT is called with interrupt disabled or not.) Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx> [binbin: split into new patch] Signed-off-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx> --- TDX interrupts breakout: - This is split out as a new patch from patch "KVM: TDX: remove use of struct vcpu_vmx from posted_interrupt.c" --- arch/x86/kvm/vmx/posted_intr.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c index 8951c773a475..651ef663845c 100644 --- a/arch/x86/kvm/vmx/posted_intr.c +++ b/arch/x86/kvm/vmx/posted_intr.c @@ -211,7 +211,8 @@ static bool vmx_needs_pi_wakeup(struct kvm_vcpu *vcpu) * notification vector is switched to the one that calls * back to the pi_wakeup_handler() function. */ - return vmx_can_use_ipiv(vcpu) || vmx_can_use_vtd_pi(vcpu->kvm); + return (vmx_can_use_ipiv(vcpu) && !is_td_vcpu(vcpu)) || + vmx_can_use_vtd_pi(vcpu->kvm); } void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu) @@ -221,7 +222,8 @@ void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu) if (!vmx_needs_pi_wakeup(vcpu)) return; - if (kvm_vcpu_is_blocking(vcpu) && !vmx_interrupt_blocked(vcpu)) + if (kvm_vcpu_is_blocking(vcpu) && + (is_td_vcpu(vcpu) || !vmx_interrupt_blocked(vcpu))) pi_enable_wakeup_handler(vcpu); /* -- 2.46.0
