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KVM: arm/arm64: vgic-new: Add SGIPENDR register handlers

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As this register is v2 specific, its implementation lives entirely
in vgic-mmio-v2.c.
This register allows setting the source mask of an IPI.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Andre Przywara 2015-12-09 16:21:37 +00:00 committed by Christoffer Dall
parent 55cc01fb90
commit ed40213ef9
1 changed files with 60 additions and 2 deletions
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62
virt/kvm/arm/vgic/vgic-mmio-v2.c
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@ -146,6 +146,64 @@ static void vgic_mmio_write_target(struct kvm_vcpu *vcpu,
}
}
static unsigned long vgic_mmio_read_sgipend(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
u32 intid = addr & 0x0f;
int i;
u64 val = 0;
for (i = 0; i < len; i++) {
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
val |= (u64)irq->source << (i * 8);
}
return val;
}
static void vgic_mmio_write_sgipendc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
{
u32 intid = addr & 0x0f;
int i;
for (i = 0; i < len; i++) {
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
spin_lock(&irq->irq_lock);
irq->source &= ~((val >> (i * 8)) & 0xff);
if (!irq->source)
irq->pending = false;
spin_unlock(&irq->irq_lock);
}
}
static void vgic_mmio_write_sgipends(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
{
u32 intid = addr & 0x0f;
int i;
for (i = 0; i < len; i++) {
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
spin_lock(&irq->irq_lock);
irq->source |= (val >> (i * 8)) & 0xff;
if (irq->source) {
irq->pending = true;
vgic_queue_irq_unlock(vcpu->kvm, irq);
} else {
spin_unlock(&irq->irq_lock);
}
}
}
static const struct vgic_register_region vgic_v2_dist_registers[] = {
REGISTER_DESC_WITH_LENGTH(GIC_DIST_CTRL,
vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc, 12,
@ -184,10 +242,10 @@ static const struct vgic_register_region vgic_v2_dist_registers[] = {
vgic_mmio_read_raz, vgic_mmio_write_sgir, 4,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH(GIC_DIST_SGI_PENDING_CLEAR,
vgic_mmio_read_raz, vgic_mmio_write_wi, 16,
vgic_mmio_read_sgipend, vgic_mmio_write_sgipendc, 16,
VGIC_ACCESS_32bit | VGIC_ACCESS_8bit),
REGISTER_DESC_WITH_LENGTH(GIC_DIST_SGI_PENDING_SET,
vgic_mmio_read_raz, vgic_mmio_write_wi, 16,
vgic_mmio_read_sgipend, vgic_mmio_write_sgipends, 16,
VGIC_ACCESS_32bit | VGIC_ACCESS_8bit),
};