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KVM: arm/arm64: vgic-new: Add GICv3 CTLR, IIDR, TYPER handlers

Browse source 
As in the GICv2 emulation we handle those three registers in one
function.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Andre Przywara 2016-01-27 14:54:30 +00:00 committed by Christoffer Dall
parent ed9b8cefa9
commit fd59ed3be1
2 changed files with 48 additions and 1 deletions
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48
virt/kvm/arm/vgic/vgic-mmio-v3.c
View file

@ -22,6 +22,52 @@
#include "vgic.h"
#include "vgic-mmio.h"
static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
u32 value = 0;
switch (addr & 0x0c) {
case GICD_CTLR:
if (vcpu->kvm->arch.vgic.enabled)
value |= GICD_CTLR_ENABLE_SS_G1;
value |= GICD_CTLR_ARE_NS | GICD_CTLR_DS;
break;
case GICD_TYPER:
value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
value = (value >> 5) - 1;
value |= (INTERRUPT_ID_BITS_SPIS - 1) << 19;
break;
case GICD_IIDR:
value = (PRODUCT_ID_KVM << 24) | (IMPLEMENTER_ARM << 0);
break;
default:
return 0;
}
return value;
}
static void vgic_mmio_write_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
{
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
bool was_enabled = dist->enabled;
switch (addr & 0x0c) {
case GICD_CTLR:
dist->enabled = val & GICD_CTLR_ENABLE_SS_G1;
if (!was_enabled && dist->enabled)
vgic_kick_vcpus(vcpu->kvm);
break;
case GICD_TYPER:
case GICD_IIDR:
return;
}
}
/*
* The GICv3 per-IRQ registers are split to control PPIs and SGIs in the
* redistributors, while SPIs are covered by registers in the distributor
@ -48,7 +94,7 @@
static const struct vgic_register_region vgic_v3_dist_registers[] = {
REGISTER_DESC_WITH_LENGTH(GICD_CTLR,
vgic_mmio_read_raz, vgic_mmio_write_wi, 16,
vgic_mmio_read_v3_misc, vgic_mmio_write_v3_misc, 16,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_IGROUPR,
vgic_mmio_read_rao, vgic_mmio_write_wi, 1,

1
virt/kvm/arm/vgic/vgic.h
View file

@ -19,6 +19,7 @@
#define PRODUCT_ID_KVM 0x4b /* ASCII code K */
#define IMPLEMENTER_ARM 0x43b
#define INTERRUPT_ID_BITS_SPIS 10
#define VGIC_PRI_BITS 5
#define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)