KVM: arm64: vgic-its: Fix vgic_its_check_device_id BE handling

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>

diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index d6697c4d81ec5c6084ecb0b3dd596160ffac1a70..2ac5927b1d91366142647b51d3a1ccf2e05fd3da 100644 (file)
--- 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;