[PATCH v1 3/3] KVM: VMX: Introduce pi_is_pir_empty() helper

Joao Martins
2019-11-06T17:57:57Z

Streamline the PID.PIR check and change its call sites to use
the newly added helper.

Suggested-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
---
arch/x86/kvm/vmx/vmx.c | 5 ++---
arch/x86/kvm/vmx/vmx.h | 5 +++++
2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 75d903455e1c..8e8dbb174d14 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1311,7 +1311,7 @@ static void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu)
*/
smp_mb__after_atomic();

- if (!bitmap_empty((unsigned long *)pi_desc->pir, NR_VECTORS))
+ if (!pi_is_pir_empty(pi_desc))
pi_set_on(pi_desc);
}

@@ -6157,8 +6157,7 @@ static bool vmx_dy_apicv_has_pending_interrupt(struct kvm_vcpu *vcpu)
{
struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);

- return pi_test_on(pi_desc) ||
- !bitmap_empty((unsigned long *)pi_desc->pir, NR_VECTORS);
+ return pi_test_on(pi_desc) || !pi_is_pir_empty(pi_desc);
}

static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 1e32ab54fc2d..5a0f34b1e226 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -355,6 +355,11 @@ static inline 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 inline bool pi_is_pir_empty(struct pi_desc *pi_desc)
+{
+ return bitmap_empty((unsigned long *)pi_desc->pir, NR_VECTORS);
+}
+
static inline void pi_set_sn(struct pi_desc *pi_desc)
{
set_bit(POSTED_INTR_SN,
--
2.11.0