cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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gp100.c (1939B)

      1/*
      2 * Copyright 2017 Rhys Kidd
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: Rhys Kidd
     23 */
     24#include "priv.h"
     25
     26static int
     27gp100_temp_get(struct nvkm_therm *therm)
     28{
     29	struct nvkm_device *device = therm->subdev.device;
     30	struct nvkm_subdev *subdev = &therm->subdev;
     31	u32 tsensor = nvkm_rd32(device, 0x020460);
     32	u32 inttemp = (tsensor & 0x0001fff8);
     33
     34	/* device SHADOWed */
     35	if (tsensor & 0x40000000)
     36		nvkm_trace(subdev, "reading temperature from SHADOWed sensor\n");
     37
     38	/* device valid */
     39	if (tsensor & 0x20000000)
     40		return (inttemp >> 8);
     41	else
     42		return -ENODEV;
     43}
     44
     45static const struct nvkm_therm_func
     46gp100_therm = {
     47	.temp_get = gp100_temp_get,
     48	.program_alarms = nvkm_therm_program_alarms_polling,
     49};
     50
     51int
     52gp100_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     53		struct nvkm_therm **ptherm)
     54{
     55	return nvkm_therm_new_(&gp100_therm, device, type, inst, ptherm);
     56}