[PATCH 47/55] KVM: arm64: vgic-its: Fix vgic_its_check_device_id BE handling

Marc Zyngier
2016-07-22T17:29:04Z

The ITS tables are stored in LE format. If the host is reading
a L1 table entry to check its validity, it must convert it to
the CPU endianness.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
virt/kvm/arm/vgic/vgic-its.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index d6697c4..2ac5927 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -707,6 +707,8 @@ static bool vgic_its_check_device_id(struct kvm *kvm, struct vgic_its *its,
&indirect_ptr, sizeof(indirect_ptr)))
return false;

+ indirect_ptr = le64_to_cpu(indirect_ptr);
+
/* check the valid bit of the first level entry */
if (!(indirect_ptr & BIT_ULL(63)))
return false;
--
2.8.1