On machines with no 32-bit addressable RAM whatsoever, we shouldn't even touch the v7s format as it's never going to work.
Fixes: e5fc9753b1a8 ("iommu/io-pgtable: Add ARMv7 short descriptor support") Reported-by: Eric Auger <eric.au...@redhat.com> Tested-by: Eric Auger <eric.au...@redhat.com> Signed-off-by: Robin Murphy <robin.mur...@arm.com> --- Apparently, in my haste, I overlooked that not everything that can do COMPILE_TEST also has a PHYS_OFFSET. drivers/iommu/io-pgtable-arm-v7s.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c index def8ca1c982d..f50e51c1a9c8 100644 --- a/drivers/iommu/io-pgtable-arm-v7s.c +++ b/drivers/iommu/io-pgtable-arm-v7s.c @@ -633,6 +633,10 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg, { struct arm_v7s_io_pgtable *data; +#ifdef PHYS_OFFSET + if (upper_32_bits(PHYS_OFFSET)) + return NULL; +#endif if (cfg->ias > ARM_V7S_ADDR_BITS || cfg->oas > ARM_V7S_ADDR_BITS) return NULL; -- 2.8.1.dirty _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu