From 33fa9fe3ddae48c552bce1ab33db0f2f49eb81ea Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= Date: Tue, 22 Jul 2014 17:42:20 +0200 Subject: drm/radeon: fix R600_PTE_GART handling MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit That didn't worked correctly any more and opened up a security problem. Signed-off-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/radeon/cik_sdma.c | 3 +-- drivers/gpu/drm/radeon/radeon.h | 6 +++--- drivers/gpu/drm/radeon/si_dma.c | 3 +-- 3 files changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c index 4b2ab76..d629cea 100644 --- a/drivers/gpu/drm/radeon/cik_sdma.c +++ b/drivers/gpu/drm/radeon/cik_sdma.c @@ -771,8 +771,7 @@ void cik_sdma_vm_set_page(struct radeon_device *rdev, trace_radeon_vm_set_page(pe, addr, count, incr, flags); - /* XXX: How to distinguish between GART and other system memory pages? */ - if (flags & R600_PTE_SYSTEM) { + if ((flags & R600_PTE_GART_MASK) == R600_PTE_GART_MASK) { uint64_t src = rdev->gart.table_addr + (addr >> 12) * 8; while (count) { unsigned bytes = count * 8; diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 89b63b9..fd878c7 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -864,9 +864,9 @@ struct radeon_mec { #define R600_PTE_FRAG_64KB (4 << 7) #define R600_PTE_FRAG_256KB (6 << 7) -/* flags used for GART page table entries on R600+ */ -#define R600_PTE_GART ( R600_PTE_VALID | R600_PTE_SYSTEM | R600_PTE_SNOOPED \ - | R600_PTE_READABLE | R600_PTE_WRITEABLE) +/* flags needed to be set so we can copy directly from the GART table */ +#define R600_PTE_GART_MASK ( R600_PTE_READABLE | R600_PTE_WRITEABLE | \ + R600_PTE_SYSTEM | R600_PTE_VALID ) struct radeon_vm_pt { struct radeon_bo *bo; diff --git a/drivers/gpu/drm/radeon/si_dma.c b/drivers/gpu/drm/radeon/si_dma.c index c9da341..a26e842 100644 --- a/drivers/gpu/drm/radeon/si_dma.c +++ b/drivers/gpu/drm/radeon/si_dma.c @@ -79,8 +79,7 @@ void si_dma_vm_set_page(struct radeon_device *rdev, trace_radeon_vm_set_page(pe, addr, count, incr, flags); - /* XXX: How to distinguish between GART and other system memory pages? */ - if (flags & R600_PTE_SYSTEM) { + if ((flags & R600_PTE_GART_MASK) == R600_PTE_GART_MASK) { uint64_t src = rdev->gart.table_addr + (addr >> 12) * 8; while (count) { unsigned bytes = count * 8; -- cgit v1.1