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KVM: arm/arm64: Implement KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION

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Now all the internals are ready to handle multiple redistributor
regions, let's allow the userspace to register them.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Eric Auger
2018-05-22 09:55:17 +02:00
committed by Marc Zyngier
parent 6e4076735d
commit 04c1109322
4 changed files with 67 additions and 4 deletions
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40
virt/kvm/arm/vgic/vgic-kvm-device.c
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@@ -92,7 +92,7 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
if (r)
break;
if (write) {
r = vgic_v3_set_redist_base(kvm, *addr);
r = vgic_v3_set_redist_base(kvm, 0, *addr, 0);
goto out;
}
rdreg = list_first_entry(&vgic->rd_regions,
@@ -103,6 +103,43 @@ int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
addr_ptr = &rdreg->base;
break;
}
case KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION:
{
struct vgic_redist_region *rdreg;
u8 index;
r = vgic_check_type(kvm, KVM_DEV_TYPE_ARM_VGIC_V3);
if (r)
break;
index = *addr & KVM_VGIC_V3_RDIST_INDEX_MASK;
if (write) {
gpa_t base = *addr & KVM_VGIC_V3_RDIST_BASE_MASK;
u32 count = (*addr & KVM_VGIC_V3_RDIST_COUNT_MASK)
>> KVM_VGIC_V3_RDIST_COUNT_SHIFT;
u8 flags = (*addr & KVM_VGIC_V3_RDIST_FLAGS_MASK)
>> KVM_VGIC_V3_RDIST_FLAGS_SHIFT;
if (!count || flags)
r = -EINVAL;
else
r = vgic_v3_set_redist_base(kvm, index,
base, count);
goto out;
}
rdreg = vgic_v3_rdist_region_from_index(kvm, index);
if (!rdreg) {
r = -ENOENT;
goto out;
}
*addr = index;
*addr |= rdreg->base;
*addr |= (u64)rdreg->count << KVM_VGIC_V3_RDIST_COUNT_SHIFT;
goto out;
}
default:
r = -ENODEV;
}
@@ -674,6 +711,7 @@ static int vgic_v3_has_attr(struct kvm_device *dev,
switch (attr->attr) {
case KVM_VGIC_V3_ADDR_TYPE_DIST:
case KVM_VGIC_V3_ADDR_TYPE_REDIST:
case KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION:
return 0;
}
break;