KVM: x86: add method to test PIR bitmap vector

kvm_x86_ops->test_posted_interrupt() returns true/false depending
whether 'vector' is set.

Next patch makes use of this interface.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2 files changed, 15 insertions, 0 deletions

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index d89c6b828c96..cb19d05af3cd 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -753,6 +753,7 @@ struct kvm_x86_ops {
         void (*set_virtual_x2apic_mode)(struct kvm_vcpu *vcpu, bool set);
         void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu, hpa_t hpa);
         void (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector);
+        bool (*test_posted_interrupt)(struct kvm_vcpu *vcpu, int vector);
         void (*sync_pir_to_irr)(struct kvm_vcpu *vcpu);
         int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
         int (*get_tdp_level)(void);
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6e71fac27d4e..3b97f8b3065e 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -435,6 +435,11 @@ static int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc)
         return test_and_set_bit(vector, (unsigned long *)pi_desc->pir);
 }
 
+static int pi_test_pir(int vector, struct pi_desc *pi_desc)
+{
+        return test_bit(vector, (unsigned long *)pi_desc->pir);
+}
+
 struct vcpu_vmx {
         struct kvm_vcpu       vcpu;
         unsigned long         host_rsp;
@@ -5897,6 +5902,7 @@ static __init int hardware_setup(void)
                 kvm_x86_ops->hwapic_irr_update = NULL;
                 kvm_x86_ops->hwapic_isr_update = NULL;
                 kvm_x86_ops->deliver_posted_interrupt = NULL;
+                kvm_x86_ops->test_posted_interrupt = NULL;
                 kvm_x86_ops->sync_pir_to_irr = vmx_sync_pir_to_irr_dummy;
         }
 
@@ -6968,6 +6974,13 @@ static int handle_invvpid(struct kvm_vcpu *vcpu)
         return 1;
 }
 
+static bool vmx_test_pir(struct kvm_vcpu *vcpu, int vector)
+{
+        struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+        return pi_test_pir(vector, &vmx->pi_desc);
+}
+
 /*
  * The exit handlers return 1 if the exit was handled fully and guest execution
  * may resume.  Otherwise they set the kvm_run parameter to indicate what needs
@@ -9562,6 +9575,7 @@ static struct kvm_x86_ops vmx_x86_ops = {
         .hwapic_isr_update = vmx_hwapic_isr_update,
         .sync_pir_to_irr = vmx_sync_pir_to_irr,
         .deliver_posted_interrupt = vmx_deliver_posted_interrupt,
+        .test_posted_interrupt = vmx_test_pir,
 
         .set_tss_addr = vmx_set_tss_addr,
         .get_tdp_level = get_ept_level,