@@ -217,6 +217,9 @@ struct vgic_dist {
/* vGIC model the kernel emulates for the guest (GICv2 or GICv3) */
u32 vgic_model;
+ /* Implementation revision as reported in the GICD_IIDR */
+ u32 implementation_rev;
+
/* Do injected MSIs require an additional device ID? */
bool msis_require_devid;
@@ -298,6 +298,7 @@ int vgic_init(struct kvm *kvm)
vgic_debug_init(kvm);
+ dist->implementation_rev = 0;
dist->initialized = true;
out:
@@ -25,19 +25,21 @@
static unsigned long vgic_mmio_read_v2_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
+ struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
u32 value;
switch (addr & 0x0c) {
case GIC_DIST_CTRL:
- value = vcpu->kvm->arch.vgic.enabled ? GICD_ENABLE : 0;
+ value = vgic->enabled ? GICD_ENABLE : 0;
break;
case GIC_DIST_CTR:
- value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
+ value = vgic->nr_spis + VGIC_NR_PRIVATE_IRQS;
value = (value >> 5) - 1;
value |= (atomic_read(&vcpu->kvm->online_vcpus) - 1) << 5;
break;
case GIC_DIST_IIDR:
value = (PRODUCT_ID_KVM << GICD_IIDR_PRODUCT_ID_SHIFT) |
+ (vgic->implementation_rev << GICD_IIDR_REVISION_SHIFT) |
(IMPLEMENTER_ARM << GICD_IIDR_IMPLEMENTER_SHIFT);
break;
default:
@@ -62,16 +62,17 @@ bool vgic_supports_direct_msis(struct kvm *kvm)
static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
+ struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
u32 value = 0;
switch (addr & 0x0c) {
case GICD_CTLR:
- if (vcpu->kvm->arch.vgic.enabled)
+ if (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 = vgic->nr_spis + VGIC_NR_PRIVATE_IRQS;
value = (value >> 5) - 1;
if (vgic_has_its(vcpu->kvm)) {
value |= (INTERRUPT_ID_BITS_ITS - 1) << 19;
@@ -82,6 +83,7 @@ static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
break;
case GICD_IIDR:
value = (PRODUCT_ID_KVM << GICD_IIDR_PRODUCT_ID_SHIFT) |
+ (vgic->implementation_rev << GICD_IIDR_REVISION_SHIFT) |
(IMPLEMENTER_ARM << GICD_IIDR_IMPLEMENTER_SHIFT);
break;
default:
As we are about to tweak implementation aspects of the VGIC emulation, while still preserving some level of backwards compatibility support, add a field to keep track of the implementation revision field which is reported to the VM and to userspace. Signed-off-by: Christoffer Dall <christoffer.dall@arm.com> --- include/kvm/arm_vgic.h | 3 +++ virt/kvm/arm/vgic/vgic-init.c | 1 + virt/kvm/arm/vgic/vgic-mmio-v2.c | 6 ++++-- virt/kvm/arm/vgic/vgic-mmio-v3.c | 6 ++++-- 4 files changed, 12 insertions(+), 4 deletions(-) -- 2.7.4 IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.