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  1. 21 Aug, 2024 3 commits
    • Srinivasan Shanmugam's avatar
      drm/amdgpu: Add sysfs interface for running cleaner shader · d361ad5d
      Srinivasan Shanmugam authored 
      This patch adds a new sysfs interface for running the cleaner shader on
AMD GPUs. The cleaner shader is used to clear GPU memory before it's
reused, which can help prevent data leakage between different processes.

The new sysfs file is write-only and is named `run_cleaner_shader`.
Write the number of the partition to this file to trigger the cleaner shader
on that partition. There is only one partition on GPUs which do not
support partitioning.

Changes made in this patch:

- Added `amdgpu_set_run_cleaner_shader` function to handle writes to the
  `run_cleaner_shader` sysfs file.
- Added `run_cleaner_shader` to the list of device attributes in
  `amdgpu_device_attrs`.
- Updated `default_attr_update` to handle `run_cleaner_shader`.
- Added `AMDGPU_DEVICE_ATTR_WO` macro to create write-only device
  attributes.

v2: fix error handling (Alex)

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarSrinivasan Shanmugam <srinivasan.shanmugam@amd.com>
      d361ad5d
    • Srinivasan Shanmugam's avatar
      drm/amdgpu: Add enforce_isolation sysfs attribute · e189be9b
      Srinivasan Shanmugam authored 
      This commit adds a new sysfs attribute 'enforce_isolation' to control
the 'enforce_isolation' setting per GPU. The attribute can be read and
written, and accepts values 0 (disabled) and 1 (enabled).

When 'enforce_isolation' is enabled, reserved VMIDs are allocated for
each ring. When it's disabled, the reserved VMIDs are freed.

The set function locks a mutex before changing the 'enforce_isolation'
flag and the VMIDs, and unlocks it afterwards. This ensures that these
operations are atomic and prevents race conditions and other concurrency
issues.

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarSrinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Suggested-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      e189be9b
    • Srinivasan Shanmugam's avatar
      drm/amdgpu: Enforce isolation as part of the job · dba1a6cf
      Srinivasan Shanmugam authored 
      This patch adds a new parameter 'enforce_isolation' to the amdgpu_job
structure. This parameter is used to determine whether shader isolation
should be enforced for a job. The enforce_isolation parameter is then
stored in the amdgpu_job structure and used when flushing the VM.

The enforce_isolation field of the amdgpu_job structure is set directly
after the job is allocated

This change allows more fine-grained control over shader isolation,
making it possible to enforce isolation on a per-job basis rather than
globally. This can be useful in scenarios where only certain jobs
require isolation.

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarSrinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Suggested-by: default avatarChristian König <christian.koenig@amd.com>
      dba1a6cf
  3. 16 Aug, 2024 37 commits
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