5.15-stable review patch. If anyone has any objections, please let me know.
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From: Sean Christopherson seanjc@google.com
commit 322a569c4b4188a0da2812f9e952780ce09b74ba upstream.
Move the non-VMX chunk of the "interrupt blocked" checks to a separate helper so that KVM can reuse the code to detect if interrupts are blocked for L2, e.g. to determine if a virtual interrupt _for L2_ is a valid wake event. If L1 disables HLT-exiting for L2, nested APICv is enabled, and L2 HLTs, then L2 virtual interrupts are valid wake events, but if and only if interrupts are unblocked for L2.
Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240607172609.3205077-4-seanjc@google.com Signed-off-by: Sean Christopherson seanjc@google.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/kvm/vmx/vmx.c | 11 ++++++++--- arch/x86/kvm/vmx/vmx.h | 1 + 2 files changed, 9 insertions(+), 3 deletions(-)
--- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -4706,14 +4706,19 @@ static int vmx_nmi_allowed(struct kvm_vc return !vmx_nmi_blocked(vcpu); }
+bool __vmx_interrupt_blocked(struct kvm_vcpu *vcpu) +{ + return !(vmx_get_rflags(vcpu) & X86_EFLAGS_IF) || + (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & + (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); +} + bool vmx_interrupt_blocked(struct kvm_vcpu *vcpu) { if (is_guest_mode(vcpu) && nested_exit_on_intr(vcpu)) return false;
- return !(vmx_get_rflags(vcpu) & X86_EFLAGS_IF) || - (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & - (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS)); + return __vmx_interrupt_blocked(vcpu); }
static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu, bool for_injection) --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -388,6 +388,7 @@ u64 construct_eptp(struct kvm_vcpu *vcpu bool vmx_guest_inject_ac(struct kvm_vcpu *vcpu); void vmx_update_exception_bitmap(struct kvm_vcpu *vcpu); bool vmx_nmi_blocked(struct kvm_vcpu *vcpu); +bool __vmx_interrupt_blocked(struct kvm_vcpu *vcpu); bool vmx_interrupt_blocked(struct kvm_vcpu *vcpu); bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu); void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked);