Hi all,
These series of patches introduce a feature to support secure buffer object. The Trusted Memory Zone (TMZ) is a method to protect the contents being written to and read from memory. We use TMZ hardware memory protection scheme to implement the secure buffer object support.
TMZ is the page-level protection that hardware will detect the TMZ bit in the page table entry to set the current page is encrypted. With this hardware feature, we design a BO-level protection in kernel driver to provide a new flag AMDGPU_GEM_CREATE_ENCRYPTED to gem create ioctl to libdrm for the secure buffer allocation. And also provide the new AMDGPU_CS_FLAGS_SECURE to indicate the command submmission is trusted or not. If the BO is secure, then the data is encrypted, only the trusted IP blocks such as gfx, sdma, vcn are able to decrypt. CPU as the un-trusted IP are unable to read the secure buffer.
We will submit the new secure command later for libdrm, and create a new test suite to verify the security feature in the libdrm unit tests.
Suite id = 11: Name 'Security Tests status: ENABLED' Test id 1: Name: 'allocate secure buffer test status: ENABLED' Test id 2: Name: 'graphics secure command submission status: ENABLED'
Changes from V1 -> V2: - Change the UAPI from secure context to secure command submission for display server and client usage. (Thanks Luben) - Remove ttm_mem_reg macro to get ttm_bo object. - Move the amdgpu_bo_encrypted into amdgpu_vm_bo_update().
Thanks, Ray
Alex Deucher (3): drm/amdgpu: add UAPI for creating encrypted buffers drm/amdgpu: define the TMZ bit for the PTE drm/amdgpu: set TMZ bits in PTEs for secure BO (v4)
Huang Rui (7): drm/amdgpu: add tmz feature parameter (v2) drm/amdgpu: add amdgpu_tmz data structure drm/amdgpu: add function to check tmz capability (v4) drm/amdgpu: add tmz bit in frame control packet drm/amdgpu: expand the emit tmz interface with trusted flag drm/amdgpu: expand the context control interface with trust flag drm/amdgpu: job is secure iff CS is secure (v3)
Luben Tuikov (1): drm/amdgpu: add UAPI to create secure commands (v3)
drivers/gpu/drm/amd/amdgpu/Makefile | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 7 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 8 ++++- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 11 +++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 12 +++++++- drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 4 +-- drivers/gpu/drm/amd/amdgpu/amdgpu_job.h | 2 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 11 +++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 9 +++--- drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c | 49 ++++++++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h | 39 ++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 5 +++ drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 3 ++ drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 20 +++++++++--- drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c | 3 +- drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c | 3 +- drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 3 +- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 16 +++++++--- drivers/gpu/drm/amd/amdgpu/nvd.h | 1 + drivers/gpu/drm/amd/amdgpu/soc15d.h | 1 + include/uapi/drm/amdgpu_drm.h | 10 +++++- 22 files changed, 199 insertions(+), 23 deletions(-) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h