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authorAndre Przywara <andre.przywara@arm.com>2016-03-07 17:32:29 +0700
committerChristoffer Dall <christoffer.dall@linaro.org>2016-05-20 15:39:43 +0200
commit2defaff48aaf16072a6eac4cf8234917197dfa72 (patch)
tree45979a2277254da13f71c0cf509140327cb46817 /virt/kvm/arm
parentd5a5a0eff368f039ed2222b47c15f09cb60e1245 (diff)
downloadlinux-stericsson-2defaff48aaf16072a6eac4cf8234917197dfa72.tar.gz
KVM: arm/arm64: pmu: abstract access to number of SPIs
Currently the PMU uses a member of the struct vgic_dist directly, which not only breaks abstraction, but will fail with the new VGIC. Abstract this access in the VGIC header file and refactor the validity check in the PMU code. Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Diffstat (limited to 'virt/kvm/arm')
-rw-r--r--virt/kvm/arm/pmu.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/virt/kvm/arm/pmu.c b/virt/kvm/arm/pmu.c
index 575c7aa30d7e..a027569facfa 100644
--- a/virt/kvm/arm/pmu.c
+++ b/virt/kvm/arm/pmu.c
@@ -436,7 +436,14 @@ static int kvm_arm_pmu_v3_init(struct kvm_vcpu *vcpu)
return 0;
}
-static bool irq_is_valid(struct kvm *kvm, int irq, bool is_ppi)
+#define irq_is_ppi(irq) ((irq) >= VGIC_NR_SGIS && (irq) < VGIC_NR_PRIVATE_IRQS)
+
+/*
+ * For one VM the interrupt type must be same for each vcpu.
+ * As a PPI, the interrupt number is the same for all vcpus,
+ * while as an SPI it must be a separate number per vcpu.
+ */
+static bool pmu_irq_is_valid(struct kvm *kvm, int irq)
{
int i;
struct kvm_vcpu *vcpu;
@@ -445,7 +452,7 @@ static bool irq_is_valid(struct kvm *kvm, int irq, bool is_ppi)
if (!kvm_arm_pmu_irq_initialized(vcpu))
continue;
- if (is_ppi) {
+ if (irq_is_ppi(irq)) {
if (vcpu->arch.pmu.irq_num != irq)
return false;
} else {
@@ -457,7 +464,6 @@ static bool irq_is_valid(struct kvm *kvm, int irq, bool is_ppi)
return true;
}
-
int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr)
{
switch (attr->attr) {
@@ -471,14 +477,11 @@ int kvm_arm_pmu_v3_set_attr(struct kvm_vcpu *vcpu, struct kvm_device_attr *attr)
if (get_user(irq, uaddr))
return -EFAULT;
- /*
- * The PMU overflow interrupt could be a PPI or SPI, but for one
- * VM the interrupt type must be same for each vcpu. As a PPI,
- * the interrupt number is the same for all vcpus, while as an
- * SPI it must be a separate number per vcpu.
- */
- if (irq < VGIC_NR_SGIS || irq >= vcpu->kvm->arch.vgic.nr_irqs ||
- !irq_is_valid(vcpu->kvm, irq, irq < VGIC_NR_PRIVATE_IRQS))
+ /* The PMU overflow interrupt can be a PPI or a valid SPI. */
+ if (!(irq_is_ppi(irq) || vgic_valid_spi(vcpu->kvm, irq)))
+ return -EINVAL;
+
+ if (!pmu_irq_is_valid(vcpu->kvm, irq))
return -EINVAL;
if (kvm_arm_pmu_irq_initialized(vcpu))