drm/amdgpu: Add enforce_isolation sysfs attribute

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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: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Srinivasan Shanmugam 2024-05-27 07:30:47 +05:30 • committed by Alex Deucher

parent dba1a6cfc3

commit e189be9b2e

4 changed files with 107 additions and 0 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu.h

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

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101

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c

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2

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h

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