File hw-arm-smmuv3-Apply-address-mask-to-line.patch of Package qemu

Overview Repositories Revisions Requests Users Attributes Meta

File hw-arm-smmuv3-Apply-address-mask-to-line.patch of Package qemu (Revision a78b2f4db41a83a128f2d8d03ad3298f)

Currently displaying revision a78b2f4db41a83a128f2d8d03ad3298f , Show latest

From: Simon Veith <sveith@amazon.de>
Date: Fri, 20 Dec 2019 14:03:00 +0000
Subject: hw/arm/smmuv3: Apply address mask to linear strtab base address

Git-commit: 3d44c60500785f18bb469c9de0aeba7415c0f28f

In the SMMU_STRTAB_BASE register, the stream table base address only
occupies bits [51:6]. Other bits, such as RA (bit [62]), must be masked
out to obtain the base address.

The branch for 2-level stream tables correctly applies this mask by way
of SMMU_BASE_ADDR_MASK, but the one for linear stream tables does not.

Apply the missing mask in that case as well so that the correct stream
base address is used by guests which configure a linear stream table.

Linux guests are unaffected by this change because they choose a 2-level
stream table layout for the QEMU SMMUv3, based on the size of its stream
ID space.

ref. ARM IHI 0070C, section 6.3.23.

Signed-off-by: Simon Veith <sveith@amazon.de>
Acked-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Message-id: 1576509312-13083-2-git-send-email-sveith@amazon.de
Cc: Eric Auger <eric.auger@redhat.com>
Cc: qemu-devel@nongnu.org
Cc: qemu-arm@nongnu.org
Acked-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/arm/smmuv3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index e2fbb8357ea521cd4ca6185b3c7a..eef9a18d70f891af08ef7b03235c 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -429,7 +429,7 @@ static int smmu_find_ste(SMMUv3State *s, uint32_t sid, STE *ste,
         }
         addr = l2ptr + l2_ste_offset * sizeof(*ste);
     } else {
-        addr = s->strtab_base + sid * sizeof(*ste);
+        addr = (s->strtab_base & SMMU_BASE_ADDR_MASK) + sid * sizeof(*ste);
     }
 
     if (smmu_get_ste(s, addr, ste, event)) {

Places

File hw-arm-smmuv3-Apply-address-mask-to-line.patch of Package qemu (Revision a78b2f4db41a83a128f2d8d03ad3298f)

Places