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KVM: arm/arm64: vgic-new: Add SGIR register handler 

Triggering an IPI via this register is v2 specific, so the
implementation lives entirely in vgic-mmio-v2.c.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Andre Przywara 2015-12-01 12:42:05 +00:00 committed by Christoffer Dall
parent 2c234d6f18
commit 55cc01fb90
1 changed files with 42 additions and 1 deletions
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43
virt/kvm/arm/vgic/vgic-mmio-v2.c
View File

@ -64,6 +64,47 @@ static void vgic_mmio_write_v2_misc(struct kvm_vcpu *vcpu,
}
}
static void vgic_mmio_write_sgir(struct kvm_vcpu *source_vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
{
int nr_vcpus = atomic_read(&source_vcpu->kvm->online_vcpus);
int intid = val & 0xf;
int targets = (val >> 16) & 0xff;
int mode = (val >> 24) & 0x03;
int c;
struct kvm_vcpu *vcpu;
switch (mode) {
case 0x0: /* as specified by targets */
break;
case 0x1:
targets = (1U << nr_vcpus) - 1; /* all, ... */
targets &= ~(1U << source_vcpu->vcpu_id); /* but self */
break;
case 0x2: /* this very vCPU only */
targets = (1U << source_vcpu->vcpu_id);
break;
case 0x3: /* reserved */
return;
}
kvm_for_each_vcpu(c, vcpu, source_vcpu->kvm) {
struct vgic_irq *irq;
if (!(targets & (1U << c)))
continue;
irq = vgic_get_irq(source_vcpu->kvm, vcpu, intid);
spin_lock(&irq->irq_lock);
irq->pending = true;
irq->source |= 1U << source_vcpu->vcpu_id;
vgic_queue_irq_unlock(source_vcpu->kvm, irq);
}
}
static unsigned long vgic_mmio_read_target(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
@ -140,7 +181,7 @@ static const struct vgic_register_region vgic_v2_dist_registers[] = {
vgic_mmio_read_config, vgic_mmio_write_config, 2,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH(GIC_DIST_SOFTINT,
vgic_mmio_read_raz, vgic_mmio_write_wi, 4,
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,