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_gem_object.c (2058B)

      1/*
      2 * SPDX-License-Identifier: MIT
      3 *
      4 * Copyright © 2016 Intel Corporation
      5 */
      6
      7#include "i915_selftest.h"
      8
      9#include "huge_gem_object.h"
     10#include "selftests/igt_flush_test.h"
     11#include "selftests/mock_gem_device.h"
     12
     13static int igt_gem_object(void *arg)
     14{
     15	struct drm_i915_private *i915 = arg;
     16	struct drm_i915_gem_object *obj;
     17	int err;
     18
     19	/* Basic test to ensure we can create an object */
     20
     21	obj = i915_gem_object_create_shmem(i915, PAGE_SIZE);
     22	if (IS_ERR(obj)) {
     23		err = PTR_ERR(obj);
     24		pr_err("i915_gem_object_create failed, err=%d\n", err);
     25		goto out;
     26	}
     27
     28	err = 0;
     29	i915_gem_object_put(obj);
     30out:
     31	return err;
     32}
     33
     34static int igt_gem_huge(void *arg)
     35{
     36	const unsigned int nreal = 509; /* just to be awkward */
     37	struct drm_i915_private *i915 = arg;
     38	struct drm_i915_gem_object *obj;
     39	unsigned int n;
     40	int err;
     41
     42	/* Basic sanitycheck of our huge fake object allocation */
     43
     44	obj = huge_gem_object(i915,
     45			      nreal * PAGE_SIZE,
     46			      to_gt(i915)->ggtt->vm.total + PAGE_SIZE);
     47	if (IS_ERR(obj))
     48		return PTR_ERR(obj);
     49
     50	err = i915_gem_object_pin_pages_unlocked(obj);
     51	if (err) {
     52		pr_err("Failed to allocate %u pages (%lu total), err=%d\n",
     53		       nreal, obj->base.size / PAGE_SIZE, err);
     54		goto out;
     55	}
     56
     57	for (n = 0; n < obj->base.size / PAGE_SIZE; n++) {
     58		if (i915_gem_object_get_page(obj, n) !=
     59		    i915_gem_object_get_page(obj, n % nreal)) {
     60			pr_err("Page lookup mismatch at index %u [%u]\n",
     61			       n, n % nreal);
     62			err = -EINVAL;
     63			goto out_unpin;
     64		}
     65	}
     66
     67out_unpin:
     68	i915_gem_object_unpin_pages(obj);
     69out:
     70	i915_gem_object_put(obj);
     71	return err;
     72}
     73
     74int i915_gem_object_mock_selftests(void)
     75{
     76	static const struct i915_subtest tests[] = {
     77		SUBTEST(igt_gem_object),
     78	};
     79	struct drm_i915_private *i915;
     80	int err;
     81
     82	i915 = mock_gem_device();
     83	if (!i915)
     84		return -ENOMEM;
     85
     86	err = i915_subtests(tests, i915);
     87
     88	mock_destroy_device(i915);
     89	return err;
     90}
     91
     92int i915_gem_object_live_selftests(struct drm_i915_private *i915)
     93{
     94	static const struct i915_subtest tests[] = {
     95		SUBTEST(igt_gem_huge),
     96	};
     97
     98	return i915_subtests(tests, i915);
     99}