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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i915_module.c (2867B)

      1/*
      2 * SPDX-License-Identifier: MIT
      3 *
      4 * Copyright © 2021 Intel Corporation
      5 */
      6
      7#include <drm/drm_drv.h>
      8
      9#include "gem/i915_gem_context.h"
     10#include "gem/i915_gem_object.h"
     11#include "i915_active.h"
     12#include "i915_driver.h"
     13#include "i915_params.h"
     14#include "i915_pci.h"
     15#include "i915_perf.h"
     16#include "i915_request.h"
     17#include "i915_scheduler.h"
     18#include "i915_selftest.h"
     19#include "i915_vma.h"
     20#include "i915_vma_resource.h"
     21
     22static int i915_check_nomodeset(void)
     23{
     24	bool use_kms = true;
     25
     26	/*
     27	 * Enable KMS by default, unless explicitly overriden by
     28	 * either the i915.modeset parameter or by the
     29	 * nomodeset boot option.
     30	 */
     31
     32	if (i915_modparams.modeset == 0)
     33		use_kms = false;
     34
     35	if (drm_firmware_drivers_only() && i915_modparams.modeset == -1)
     36		use_kms = false;
     37
     38	if (!use_kms) {
     39		/* Silently fail loading to not upset userspace. */
     40		DRM_DEBUG_DRIVER("KMS disabled.\n");
     41		return 1;
     42	}
     43
     44	return 0;
     45}
     46
     47static const struct {
     48   int (*init)(void);
     49   void (*exit)(void);
     50} init_funcs[] = {
     51	{ .init = i915_check_nomodeset },
     52	{ .init = i915_active_module_init,
     53	  .exit = i915_active_module_exit },
     54	{ .init = i915_context_module_init,
     55	  .exit = i915_context_module_exit },
     56	{ .init = i915_gem_context_module_init,
     57	  .exit = i915_gem_context_module_exit },
     58	{ .init = i915_objects_module_init,
     59	  .exit = i915_objects_module_exit },
     60	{ .init = i915_request_module_init,
     61	  .exit = i915_request_module_exit },
     62	{ .init = i915_scheduler_module_init,
     63	  .exit = i915_scheduler_module_exit },
     64	{ .init = i915_vma_module_init,
     65	  .exit = i915_vma_module_exit },
     66	{ .init = i915_vma_resource_module_init,
     67	  .exit = i915_vma_resource_module_exit },
     68	{ .init = i915_mock_selftests },
     69	{ .init = i915_pmu_init,
     70	  .exit = i915_pmu_exit },
     71	{ .init = i915_pci_register_driver,
     72	  .exit = i915_pci_unregister_driver },
     73	{ .init = i915_perf_sysctl_register,
     74	  .exit = i915_perf_sysctl_unregister },
     75};
     76static int init_progress;
     77
     78static int __init i915_init(void)
     79{
     80	int err, i;
     81
     82	for (i = 0; i < ARRAY_SIZE(init_funcs); i++) {
     83		err = init_funcs[i].init();
     84		if (err < 0) {
     85			while (i--) {
     86				if (init_funcs[i].exit)
     87					init_funcs[i].exit();
     88			}
     89			return err;
     90		} else if (err > 0) {
     91			/*
     92			 * Early-exit success is reserved for things which
     93			 * don't have an exit() function because we have no
     94			 * idea how far they got or how to partially tear
     95			 * them down.
     96			 */
     97			WARN_ON(init_funcs[i].exit);
     98			break;
     99		}
    100	}
    101
    102	init_progress = i;
    103
    104	return 0;
    105}
    106
    107static void __exit i915_exit(void)
    108{
    109	int i;
    110
    111	for (i = init_progress - 1; i >= 0; i--) {
    112		GEM_BUG_ON(i >= ARRAY_SIZE(init_funcs));
    113		if (init_funcs[i].exit)
    114			init_funcs[i].exit();
    115	}
    116}
    117
    118module_init(i915_init);
    119module_exit(i915_exit);
    120
    121MODULE_AUTHOR("Tungsten Graphics, Inc.");
    122MODULE_AUTHOR("Intel Corporation");
    123
    124MODULE_DESCRIPTION(DRIVER_DESC);
    125MODULE_LICENSE("GPL and additional rights");