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KVM: arm64: vgic-its: vgic_its_check_id returns the entry's GPA 

As vgic_its_check_id() computes the device/collection entry's
GPA, let's return it so that new callers can retrieve it easily.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Eric Auger 2017-01-31 14:36:14 +01:00 committed by Christoffer Dall
parent ea1ad53e1e
commit dceff70258
1 changed files with 8 additions and 3 deletions
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11
virt/kvm/arm/vgic/vgic-its.c
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@ -694,7 +694,8 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its,
* is actually valid (covered by a memslot and guest accessible).
* For this we have to read the respective first level entry.
*/
static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id)
static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id,
gpa_t *eaddr)
{
int l1_tbl_size = GITS_BASER_NR_PAGES(baser) * SZ_64K;
u64 indirect_ptr, type = GITS_BASER_TYPE(baser);
@ -725,6 +726,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id)
addr = BASER_ADDRESS(baser) + id * esz;
gfn = addr >> PAGE_SHIFT;
if (eaddr)
*eaddr = addr;
return kvm_is_visible_gfn(its->dev->kvm, gfn);
}
@ -757,6 +760,8 @@ static bool vgic_its_check_id(struct vgic_its *its, u64 baser, u32 id)
indirect_ptr += index * esz;
gfn = indirect_ptr >> PAGE_SHIFT;
if (eaddr)
*eaddr = indirect_ptr;
return kvm_is_visible_gfn(its->dev->kvm, gfn);
}
@ -766,7 +771,7 @@ static int vgic_its_alloc_collection(struct vgic_its *its,
{
struct its_collection *collection;
if (!vgic_its_check_id(its, its->baser_coll_table, coll_id))
if (!vgic_its_check_id(its, its->baser_coll_table, coll_id, NULL))
return E_ITS_MAPC_COLLECTION_OOR;
collection = kzalloc(sizeof(*collection), GFP_KERNEL);
@ -939,7 +944,7 @@ static int vgic_its_cmd_handle_mapd(struct kvm *kvm, struct vgic_its *its,
gpa_t itt_addr = its_cmd_get_ittaddr(its_cmd);
struct its_device *device;
if (!vgic_its_check_id(its, its->baser_device_table, device_id))
if (!vgic_its_check_id(its, its->baser_device_table, device_id, NULL))
return E_ITS_MAPD_DEVICE_OOR;
if (valid && num_eventid_bits > VITS_TYPER_IDBITS)