diff mbox series

[v11,07/23] iommu/io-pgtable-arm-v7s: Use ias/oas to check the valid iova/pa

Message ID 1566615728-26388-8-git-send-email-yong.wu@mediatek.com (mailing list archive)
State New, archived
Headers show
Series MT8183 IOMMU SUPPORT | expand

Commit Message

Yong Wu (吴勇) Aug. 24, 2019, 3:01 a.m. UTC 
Use ias/oas to check the valid iova/pa. Synchronize this checking with
io-pgtable-arm.c.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Acked-by: Will Deacon <will@kernel.org>
---
 drivers/iommu/io-pgtable-arm-v7s.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index 72f1880..fa1b38f 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -504,7 +504,8 @@  static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
 	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
 		return 0;
 
-	if (WARN_ON(upper_32_bits(iova) || upper_32_bits(paddr)))
+	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
+		    paddr >= (1ULL << data->iop.cfg.oas)))
 		return -ERANGE;
 
 	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd);