[PATCH v2 07/19] KVM: ARM: vgic: abstract access to the ELRSR bitmap
Marc Zyngier
marc.zyngier at arm.com
Thu Mar 20 07:52:54 EDT 2014
Move the GICH_ELRSR access to its own function, and add it to the
vgic_ops structure.
Acked-by: Catalin Marinas <catalin.marinas at arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
include/kvm/arm_vgic.h | 1 +
virt/kvm/arm/vgic.c | 20 ++++++++++++++++----
2 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 81ca525..e82e3bb 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -84,6 +84,7 @@ struct vgic_lr {
struct vgic_ops {
struct vgic_lr (*get_lr)(const struct kvm_vcpu *, int);
void (*set_lr)(struct kvm_vcpu *, int, struct vgic_lr);
+ u64 (*get_elrsr)(const struct kvm_vcpu *vcpu);
};
struct vgic_dist {
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index bac37b8..04206a8 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1022,9 +1022,16 @@ static void vgic_v2_set_lr(struct kvm_vcpu *vcpu, int lr,
set_bit(lr, (unsigned long *)vcpu->arch.vgic_cpu.vgic_v2.vgic_elrsr);
}
+static u64 vgic_v2_get_elrsr(const struct kvm_vcpu *vcpu)
+{
+ const u32 *elrsr = vcpu->arch.vgic_cpu.vgic_v2.vgic_elrsr;
+ return *(u64 *)elrsr;
+}
+
static const struct vgic_ops vgic_ops = {
.get_lr = vgic_v2_get_lr,
.set_lr = vgic_v2_set_lr,
+ .get_elrsr = vgic_v2_get_elrsr,
};
static inline struct vgic_lr vgic_get_lr(const struct kvm_vcpu *vcpu, int lr)
@@ -1038,6 +1045,11 @@ static inline void vgic_set_lr(struct kvm_vcpu *vcpu, int lr,
vgic_ops.set_lr(vcpu, lr, vlr);
}
+static inline u64 vgic_get_elrsr(struct kvm_vcpu *vcpu)
+{
+ return vgic_ops.get_elrsr(vcpu);
+}
+
static void vgic_retire_lr(int lr_nr, int irq, struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
@@ -1278,14 +1290,15 @@ static void __kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
+ u64 elrsr = vgic_get_elrsr(vcpu);
+ unsigned long *elrsr_ptr = (unsigned long *)&elrsr;
int lr, pending;
bool level_pending;
level_pending = vgic_process_maintenance(vcpu);
/* Clear mappings for empty LRs */
- for_each_set_bit(lr, (unsigned long *)vgic_cpu->vgic_v2.vgic_elrsr,
- vgic_cpu->nr_lr) {
+ for_each_set_bit(lr, elrsr_ptr, vgic_cpu->nr_lr) {
struct vgic_lr vlr;
if (!test_and_clear_bit(lr, vgic_cpu->lr_used))
@@ -1298,8 +1311,7 @@ static void __kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu)
}
/* Check if we still have something up our sleeve... */
- pending = find_first_zero_bit((unsigned long *)vgic_cpu->vgic_v2.vgic_elrsr,
- vgic_cpu->nr_lr);
+ pending = find_first_zero_bit(elrsr_ptr, vgic_cpu->nr_lr);
if (level_pending || pending < vgic_cpu->nr_lr)
set_bit(vcpu->vcpu_id, &dist->irq_pending_on_cpu);
}
--
1.8.3.4
More information about the linux-arm-kernel
mailing list