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KVM: arm/arm64: Implement KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION 

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
View File

@ -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;

4
virt/kvm/arm/vgic/vgic-mmio-v3.c
View File

@ -764,11 +764,11 @@ free:
return ret;
}
int vgic_v3_set_redist_base(struct kvm *kvm, u64 addr)
int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count)
{
int ret;
ret = vgic_v3_insert_redist_region(kvm, 0, addr, 0);
ret = vgic_v3_insert_redist_region(kvm, index, addr, count);
if (ret)
return ret;

14
virt/kvm/arm/vgic/vgic-v3.c
View File

@ -491,6 +491,20 @@ struct vgic_redist_region *vgic_v3_rdist_free_slot(struct list_head *rd_regions)
return NULL;
}
struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
u32 index)
{
struct list_head *rd_regions = &kvm->arch.vgic.rd_regions;
struct vgic_redist_region *rdreg;
list_for_each_entry(rdreg, rd_regions, list) {
if (rdreg->index == index)
return rdreg;
}
return NULL;
}
int vgic_v3_map_resources(struct kvm *kvm)
{
struct vgic_dist *dist = &kvm->arch.vgic;

13
virt/kvm/arm/vgic/vgic.h
View File

@ -96,6 +96,13 @@
/* we only support 64 kB translation table page size */
#define KVM_ITS_L1E_ADDR_MASK GENMASK_ULL(51, 16)
#define KVM_VGIC_V3_RDIST_INDEX_MASK GENMASK_ULL(11, 0)
#define KVM_VGIC_V3_RDIST_FLAGS_MASK GENMASK_ULL(15, 12)
#define KVM_VGIC_V3_RDIST_FLAGS_SHIFT 12
#define KVM_VGIC_V3_RDIST_BASE_MASK GENMASK_ULL(51, 16)
#define KVM_VGIC_V3_RDIST_COUNT_MASK GENMASK_ULL(63, 52)
#define KVM_VGIC_V3_RDIST_COUNT_SHIFT 52
/* Requires the irq_lock to be held by the caller. */
static inline bool irq_is_pending(struct vgic_irq *irq)
{
@ -215,7 +222,7 @@ int vgic_v3_probe(const struct gic_kvm_info *info);
int vgic_v3_map_resources(struct kvm *kvm);
int vgic_v3_lpi_sync_pending_status(struct kvm *kvm, struct vgic_irq *irq);
int vgic_v3_save_pending_tables(struct kvm *kvm);
int vgic_v3_set_redist_base(struct kvm *kvm, u64 addr);
int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count);
int vgic_register_redist_iodev(struct kvm_vcpu *vcpu);
bool vgic_v3_check_base(struct kvm *kvm);
@ -284,6 +291,10 @@ vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg)
else
return rdreg->count * KVM_VGIC_V3_REDIST_SIZE;
}
struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm,
u32 index);
bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);
static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size)