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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mock_gtt.c (3910B)

      1/*
      2 * Copyright © 2016 Intel Corporation
      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 (including the next
     12 * paragraph) shall be included in all copies or substantial portions of the
     13 * Software.
     14 *
     15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     21 * IN THE SOFTWARE.
     22 *
     23 */
     24
     25#include "mock_gtt.h"
     26
     27static void mock_insert_page(struct i915_address_space *vm,
     28			     dma_addr_t addr,
     29			     u64 offset,
     30			     enum i915_cache_level level,
     31			     u32 flags)
     32{
     33}
     34
     35static void mock_insert_entries(struct i915_address_space *vm,
     36				struct i915_vma_resource *vma_res,
     37				enum i915_cache_level level, u32 flags)
     38{
     39}
     40
     41static void mock_bind_ppgtt(struct i915_address_space *vm,
     42			    struct i915_vm_pt_stash *stash,
     43			    struct i915_vma_resource *vma_res,
     44			    enum i915_cache_level cache_level,
     45			    u32 flags)
     46{
     47	GEM_BUG_ON(flags & I915_VMA_GLOBAL_BIND);
     48	vma_res->bound_flags |= flags;
     49}
     50
     51static void mock_unbind_ppgtt(struct i915_address_space *vm,
     52			      struct i915_vma_resource *vma_res)
     53{
     54}
     55
     56static void mock_cleanup(struct i915_address_space *vm)
     57{
     58}
     59
     60static void mock_clear_range(struct i915_address_space *vm,
     61			     u64 start, u64 length)
     62{
     63}
     64
     65struct i915_ppgtt *mock_ppgtt(struct drm_i915_private *i915, const char *name)
     66{
     67	struct i915_ppgtt *ppgtt;
     68
     69	ppgtt = kzalloc(sizeof(*ppgtt), GFP_KERNEL);
     70	if (!ppgtt)
     71		return NULL;
     72
     73	ppgtt->vm.gt = to_gt(i915);
     74	ppgtt->vm.i915 = i915;
     75	ppgtt->vm.total = round_down(U64_MAX, PAGE_SIZE);
     76	ppgtt->vm.dma = i915->drm.dev;
     77
     78	i915_address_space_init(&ppgtt->vm, VM_CLASS_PPGTT);
     79
     80	ppgtt->vm.alloc_pt_dma = alloc_pt_dma;
     81	ppgtt->vm.alloc_scratch_dma = alloc_pt_dma;
     82
     83	ppgtt->vm.clear_range = mock_clear_range;
     84	ppgtt->vm.insert_page = mock_insert_page;
     85	ppgtt->vm.insert_entries = mock_insert_entries;
     86	ppgtt->vm.cleanup = mock_cleanup;
     87
     88	ppgtt->vm.vma_ops.bind_vma    = mock_bind_ppgtt;
     89	ppgtt->vm.vma_ops.unbind_vma  = mock_unbind_ppgtt;
     90
     91	return ppgtt;
     92}
     93
     94static void mock_bind_ggtt(struct i915_address_space *vm,
     95			   struct i915_vm_pt_stash *stash,
     96			   struct i915_vma_resource *vma_res,
     97			   enum i915_cache_level cache_level,
     98			   u32 flags)
     99{
    100}
    101
    102static void mock_unbind_ggtt(struct i915_address_space *vm,
    103			     struct i915_vma_resource *vma_res)
    104{
    105}
    106
    107void mock_init_ggtt(struct intel_gt *gt)
    108{
    109	struct i915_ggtt *ggtt = gt->ggtt;
    110
    111	ggtt->vm.gt = gt;
    112	ggtt->vm.i915 = gt->i915;
    113	ggtt->vm.is_ggtt = true;
    114
    115	ggtt->gmadr = (struct resource) DEFINE_RES_MEM(0, 2048 * PAGE_SIZE);
    116	ggtt->mappable_end = resource_size(&ggtt->gmadr);
    117	ggtt->vm.total = 4096 * PAGE_SIZE;
    118
    119	ggtt->vm.alloc_pt_dma = alloc_pt_dma;
    120	ggtt->vm.alloc_scratch_dma = alloc_pt_dma;
    121
    122	ggtt->vm.clear_range = mock_clear_range;
    123	ggtt->vm.insert_page = mock_insert_page;
    124	ggtt->vm.insert_entries = mock_insert_entries;
    125	ggtt->vm.cleanup = mock_cleanup;
    126
    127	ggtt->vm.vma_ops.bind_vma    = mock_bind_ggtt;
    128	ggtt->vm.vma_ops.unbind_vma  = mock_unbind_ggtt;
    129
    130	i915_address_space_init(&ggtt->vm, VM_CLASS_GGTT);
    131}
    132
    133void mock_fini_ggtt(struct i915_ggtt *ggtt)
    134{
    135	i915_address_space_fini(&ggtt->vm);
    136}