01a8dcec1a
Add a function to check tmz capability with kernel parameter and ASIC type. v2: use a per device tmz variable instead of global amdgpu_tmz. v3: refine the comments for the function. (Luben) v4: add amdgpu_tmz.c/h for future use. Signed-off-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
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* Copyright 2019 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <drm/drmP.h>
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#include "amdgpu.h"
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#include "amdgpu_tmz.h"
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/**
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* amdgpu_is_tmz - validate trust memory zone
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*
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* @adev: amdgpu_device pointer
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*
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* Return true if @dev supports trusted memory zones (TMZ), and return false if
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* @dev does not support TMZ.
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*/
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bool amdgpu_is_tmz(struct amdgpu_device *adev)
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{
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if (!amdgpu_tmz)
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return false;
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if (adev->asic_type < CHIP_RAVEN || adev->asic_type == CHIP_ARCTURUS) {
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dev_warn(adev->dev, "doesn't support trusted memory zones (TMZ)\n");
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return false;
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}
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dev_info(adev->dev, "TMZ feature is enabled\n");
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return true;
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}
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