Changes in amdgpu_ptl.h

e16d0d16728179fb8eaad93c8a12825eb6746eca - drm/amdgpu: create PTL sysfs after XGMI reset-on-init restore

Tue, 03 Mar 2026 09:37:11 +0100

drm/amdgpu: create PTL sysfs after XGMI reset-on-init restoreCreate PTL sysfs in xgmi_reset_on_init restore path for MINIMAL_XGMISigned-off-by: Perry Yuan Reviewed-by: Yifan Zhang Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/include/amdgpu_ptl.h

b6dc8f753670e3833150482c1b7640b1fd3b30a3 - drm/amdgpu: add amdgpu.ptl module parameter for PTL control

Sun, 08 Feb 2026 17:42:10 +0100

drm/amdgpu: add amdgpu.ptl module parameter for PTL controlAdd a new kernel module parameter 'amdgpu.ptl' to allowusers to enable or disable PTL feature at driver loading time.Parameter values: *) 0 or -1: disable PTL (default) *) 1: enable PTL *) 2: permanently disable PTLSigned-off-by: Perry Yuan Reviewed-by: Yifan Zhang Acked-by: Alex Deucher Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/include/amdgpu_ptl.h

950688d2417085f30feb6ec48c85eeda53841ea2 - drm/amdgpu: Track PTL disable requests by source

Sun, 08 Feb 2026 17:42:09 +0100

drm/amdgpu: Track PTL disable requests by sourceUse a bitmap to track PTL disable requests from sysfs and profiler.PTL is only re-enabled once all sources have released their disablerequests, avoiding premature enablement.Signed-off-by: Perry Yuan Reviewed-by: Yifan Zhang Acked-by: Alex Deucher Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/include/amdgpu_ptl.h

dd61e27535a6f5cfb32a847b282d2e3d5aebf46f - drm/amdkfd: Add PTL control IOCTL Option and unify refcount logic

Sun, 08 Feb 2026 17:42:07 +0100

drm/amdkfd: Add PTL control IOCTL Option and unify refcount logicIntroduce a new IOCTL option to allow userspace explicit control overthe Peak Tops Limiter (PTL) state for profilingLink: https://github.com/ROCm/rocm-systems/tree/develop/projects/rocprofiler-sdkSigned-off-by: Perry Yuan Reviewed-by: Yifan Zhang Acked-by: Alex Deucher Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/include/amdgpu_ptl.h

d51a0439358d4eacd8beb39df619998d8340d232 - drm/amdgpu: add sysfs for Peak Tops Limiter (PTL)

Sun, 08 Feb 2026 17:42:06 +0100

drm/amdgpu: add sysfs for Peak Tops Limiter (PTL)Add per-GPU sysfs files under /sys/class/drm/cardX/device/ptl tocontrol the Peak Tops Limiter (PTL) feature. Exposes ptl_enable(enable/disable PTL), ptl_format (set/query preferred formats),and ptl_supported_formats (list supported formats)Example usage-------------Query PTL status: `cat /sys/class/drm/card1/device/ptl/ptl_enable`Enable PTL: `sudo bash -c "echo 1 > /sys/class/drm/card1/device/ptl/ptl_enable"`Disable PTL: `sudo bash -c "echo 0 > /sys/class/drm/card1/device/ptl/ptl_enable"`Set PTL preferred formats: `sudo bash -c "echo I8,F32 > /sys/class/drm/card1/device/ptl/ptl_format"`Query supported formats: `cat /sys/class/drm/card1/device/ptl/ptl_supported_formats`v3 changes: * move N/A to previous format in format show(Alex) * fix format check for format store(Alex) * drop the ptl declarations into amdgpu_ptl.h(Alex)v2 changes: * add usage commands in commit info (Alex) * move amdgpu_ptl_fmt into kgd_kfd_interface.h (Alex)Signed-off-by: Perry Yuan Reviewed-by: Yifan Zhang Acked-by: Alex Deucher Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/include/amdgpu_ptl.h

8ce9c73104e34f1fbb8d7f50468e4a62905331f2 - drm/amdgpu: add psp interfaces for peak tops limiter driver

Sun, 08 Feb 2026 17:42:02 +0100

drm/amdgpu: add psp interfaces for peak tops limiter driverIntroduce a Peak Tops Limiter (PTL) driver that dynamically capsengine frequency to ensure delivered TOPS never exceeds a definedTOPS_limit. This initial implementation provides core data structuresand kernel-space interfaces (set/get, enable/disable) to manage PTL state.PTL performs a firmware handshake to initialize its state and updatepredefined format types. It supports updating these format types atruntime while user-space tools automatically switch PTL state, andalso allows explicitly switching PTL state via newly added commands.Signed-off-by: Perry Yuan Reviewed-by: Lijo Lazar Acked-by: Alex Deucher Signed-off-by: Alex Deucher List of files: /linux/drivers/gpu/drm/amd/include/amdgpu_ptl.h