From 495dd859f304689a7cd5ef413c439cb090dc25e6 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 4 Jun 2013 11:02:10 +0100 Subject: KVM: ARM: vgic: abstract MISR decoding Instead of directly dealing with the GICH_MISR bits, move the code to its own function and use a couple of public flags to represent the actual state. Acked-by: Catalin Marinas Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier --- virt/kvm/arm/vgic.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) (limited to 'virt') diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 1e857e6e66b5..c0bcc9735424 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1050,12 +1050,26 @@ static u64 vgic_v2_get_eisr(const struct kvm_vcpu *vcpu) return val; } +static u32 vgic_v2_get_interrupt_status(const struct kvm_vcpu *vcpu) +{ + u32 misr = vcpu->arch.vgic_cpu.vgic_v2.vgic_misr; + u32 ret = 0; + + if (misr & GICH_MISR_EOI) + ret |= INT_STATUS_EOI; + if (misr & GICH_MISR_U) + ret |= INT_STATUS_UNDERFLOW; + + return ret; +} + static const struct vgic_ops vgic_ops = { .get_lr = vgic_v2_get_lr, .set_lr = vgic_v2_set_lr, .sync_lr_elrsr = vgic_v2_sync_lr_elrsr, .get_elrsr = vgic_v2_get_elrsr, .get_eisr = vgic_v2_get_eisr, + .get_interrupt_status = vgic_v2_get_interrupt_status, }; static struct vgic_lr vgic_get_lr(const struct kvm_vcpu *vcpu, int lr) @@ -1085,6 +1099,11 @@ static inline u64 vgic_get_eisr(struct kvm_vcpu *vcpu) return vgic_ops.get_eisr(vcpu); } +static inline u32 vgic_get_interrupt_status(struct kvm_vcpu *vcpu) +{ + return vgic_ops.get_interrupt_status(vcpu); +} + static void vgic_retire_lr(int lr_nr, int irq, struct kvm_vcpu *vcpu) { struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; @@ -1282,11 +1301,12 @@ epilog: static bool vgic_process_maintenance(struct kvm_vcpu *vcpu) { struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + u32 status = vgic_get_interrupt_status(vcpu); bool level_pending = false; - kvm_debug("MISR = %08x\n", vgic_cpu->vgic_v2.vgic_misr); + kvm_debug("STATUS = %08x\n", status); - if (vgic_cpu->vgic_v2.vgic_misr & GICH_MISR_EOI) { + if (status & INT_STATUS_EOI) { /* * Some level interrupts have been EOIed. Clear their * active bit. @@ -1319,7 +1339,7 @@ static bool vgic_process_maintenance(struct kvm_vcpu *vcpu) } } - if (vgic_cpu->vgic_v2.vgic_misr & GICH_MISR_U) + if (status & INT_STATUS_UNDERFLOW) vgic_cpu->vgic_v2.vgic_hcr &= ~GICH_HCR_UIE; return level_pending; -- cgit v1.2.3