50 lines
2.4 KiB
C
50 lines
2.4 KiB
C
/*******************************************************************************
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Copyright (c) 2016-2023 NVIDIA Corporation
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to
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deal in the Software without restriction, including without limitation the
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rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*******************************************************************************/
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#include "uvm_hmm.h"
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// Support for HMM ( https://docs.kernel.org/mm/hmm.html ):
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#ifdef NVCPU_X86_64
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static bool uvm_disable_hmm = false;
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MODULE_PARM_DESC(uvm_disable_hmm,
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"Force-disable HMM functionality in the UVM driver. "
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"Default: false (HMM is enabled if possible). "
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"However, even with uvm_disable_hmm=false, HMM will not be "
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"enabled if is not supported in this driver build "
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"configuration, or if ATS settings conflict with HMM.");
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#else
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// So far, we've only tested HMM on x86_64, so disable it by default everywhere
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// else.
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static bool uvm_disable_hmm = true;
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MODULE_PARM_DESC(uvm_disable_hmm,
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"Force-disable HMM functionality in the UVM driver. "
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"Default: true (HMM is not enabled on this CPU architecture). "
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"However, even with uvm_disable_hmm=false, HMM will not be "
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"enabled if is not supported in this driver build "
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"configuration, or if ATS settings conflict with HMM.");
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#endif
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module_param(uvm_disable_hmm, bool, 0444);
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