From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 09/21] KVM: ARM: vgic: abstract MISR decoding
Date: Mon, 30 Jun 2014 16:01:38 +0100 [thread overview]
Message-ID: <1404140510-5382-10-git-send-email-marc.zyngier@arm.com> (raw)
In-Reply-To: <1404140510-5382-1-git-send-email-marc.zyngier@arm.com>
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 <catalin.marinas@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
include/kvm/arm_vgic.h | 4 ++++
virt/kvm/arm/vgic.c | 26 +++++++++++++++++++++++---
2 files changed, 27 insertions(+), 3 deletions(-)
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index ccb9b59..4857508 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -87,6 +87,7 @@ struct vgic_ops {
void (*sync_lr_elrsr)(struct kvm_vcpu *, int, struct vgic_lr);
u64 (*get_elrsr)(const struct kvm_vcpu *vcpu);
u64 (*get_eisr)(const struct kvm_vcpu *vcpu);
+ u32 (*get_interrupt_status)(const struct kvm_vcpu *vcpu);
};
struct vgic_dist {
@@ -165,6 +166,9 @@ struct vgic_cpu {
#define LR_EMPTY 0xff
+#define INT_STATUS_EOI (1 << 0)
+#define INT_STATUS_UNDERFLOW (1 << 1)
+
struct kvm;
struct kvm_vcpu;
struct kvm_run;
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 61a6347..f26bc75 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1044,12 +1044,26 @@ 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)
@@ -1079,6 +1093,11 @@ 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;
@@ -1276,11 +1295,12 @@ 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.
@@ -1313,7 +1333,7 @@ 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;
--
2.0.0
next prev parent reply other threads:[~2014-06-30 15:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-30 15:01 [PATCH v6 00/21] arm64: GICv3 support Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 01/21] irqchip: ARM: GIC: Move some bits of GICv2 to a library-type file Marc Zyngier
2014-07-08 22:31 ` Jason Cooper
2014-07-11 16:15 ` Christoffer Dall
2014-07-11 20:47 ` Paolo Bonzini
2014-07-11 21:41 ` Christoffer Dall
2014-06-30 15:01 ` [PATCH v6 02/21] irqchip: arm64: Initial support for GICv3 Marc Zyngier
2014-06-30 17:58 ` Mark Rutland
2014-06-30 15:01 ` [PATCH v6 03/21] arm64: GICv3 device tree binding documentation Marc Zyngier
2014-06-30 16:09 ` Mark Rutland
2014-06-30 15:01 ` [PATCH v6 04/21] arm64: boot protocol documentation update for GICv3 Marc Zyngier
2014-06-30 15:56 ` Mark Rutland
2014-06-30 15:01 ` [PATCH v6 05/21] KVM: arm/arm64: vgic: move GICv2 registers to their own structure Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 06/21] KVM: ARM: vgic: introduce vgic_ops and LR manipulation primitives Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 07/21] KVM: ARM: vgic: abstract access to the ELRSR bitmap Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 08/21] KVM: ARM: vgic: abstract EISR bitmap access Marc Zyngier
2014-06-30 15:01 ` Marc Zyngier [this message]
2014-06-30 15:01 ` [PATCH v6 10/21] KVM: ARM: vgic: move underflow handling to vgic_ops Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 11/21] KVM: ARM: vgic: abstract VMCR access Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 12/21] KVM: ARM: vgic: introduce vgic_enable Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 13/21] KVM: ARM: introduce vgic_params structure Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 14/21] KVM: ARM: vgic: split GICv2 backend from the main vgic code Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 15/21] KVM: ARM: vgic: revisit implementation of irqchip_in_kernel Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 16/21] arm64: KVM: remove __kvm_hyp_code_{start, end} from hyp.S Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 17/21] arm64: KVM: split GICv2 world switch from hyp code Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 18/21] arm64: KVM: move HCR_EL2.{IMO, FMO} manipulation into the vgic switch code Marc Zyngier
2014-06-30 15:01 ` [PATCH v6 19/21] KVM: ARM: vgic: add the GICv3 backend Marc Zyngier
2014-07-04 9:42 ` Christoffer Dall
2014-06-30 15:01 ` [PATCH v6 20/21] arm64: KVM: vgic: add GICv3 world switch Marc Zyngier
2014-07-01 18:24 ` Will Deacon
2014-06-30 15:01 ` [PATCH v6 21/21] arm64: KVM: vgic: enable GICv2 emulation on top on GICv3 hardware Marc Zyngier
2014-07-04 9:58 ` Christoffer Dall
2014-06-30 15:43 ` [PATCH v6 00/21] arm64: GICv3 support Jason Cooper
2014-06-30 15:50 ` Marc Zyngier
2014-07-03 17:45 ` Marc Zyngier
2014-07-08 21:44 ` Jason Cooper
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