diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3320-drm-amdgpu-Mark-KFD-VRAM-allocations-for-wipe-on-rel.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3320-drm-amdgpu-Mark-KFD-VRAM-allocations-for-wipe-on-rel.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3320-drm-amdgpu-Mark-KFD-VRAM-allocations-for-wipe-on-rel.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3320-drm-amdgpu-Mark-KFD-VRAM-allocations-for-wipe-on-rel.patch new file mode 100644 index 00000000..96961069 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3320-drm-amdgpu-Mark-KFD-VRAM-allocations-for-wipe-on-rel.patch @@ -0,0 +1,41 @@ +From 0954dece4cd9593544905479c8ec25f68c4c485e Mon Sep 17 00:00:00 2001 +From: Felix Kuehling <Felix.Kuehling@amd.com> +Date: Mon, 8 Jul 2019 20:01:22 -0400 +Subject: [PATCH 3320/4256] drm/amdgpu: Mark KFD VRAM allocations for wipe on + release +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Memory used by KFD applications can contain sensitive information that +should not be leaked to other processes. The current approach to prevent +leaks is to clear VRAM at allocation time. This is not effective because +memory can be reused in other ways without being cleared. Synchronously +clearing memory on the allocation path also carries a significant +performance penalty. + +Stop clearing memory at allocation time. Instead mark the memory for +wipe on release. + +Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> +Reviewed-by: Christian König <christian.koenig@amd.com> +--- + drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +index d144d04d7b0e..580f52eda694 100644 +--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c ++++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +@@ -1149,7 +1149,7 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu( + */ + if (flags & ALLOC_MEM_FLAGS_VRAM) { + domain = alloc_domain = AMDGPU_GEM_DOMAIN_VRAM; +- alloc_flags = AMDGPU_GEM_CREATE_VRAM_CLEARED; ++ alloc_flags = AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE; + alloc_flags |= (flags & ALLOC_MEM_FLAGS_PUBLIC) ? + AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED : + AMDGPU_GEM_CREATE_NO_CPU_ACCESS; +-- +2.17.1 + |