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
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