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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vmmnv04.c (3875B)

      1/*
      2 * Copyright 2017 Red Hat Inc.
      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#include "vmm.h"
     23
     24#include <nvif/if000d.h>
     25#include <nvif/unpack.h>
     26
     27static inline void
     28nv04_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     29		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
     30{
     31	u32 data = addr | 0x00000003; /* PRESENT, RW. */
     32	while (ptes--) {
     33		VMM_WO032(pt, vmm, 8 + ptei++ * 4, data);
     34		data += 0x00001000;
     35	}
     36}
     37
     38static void
     39nv04_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     40		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
     41{
     42	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
     43}
     44
     45static void
     46nv04_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     47		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
     48{
     49#if PAGE_SHIFT == 12
     50	nvkm_kmap(pt->memory);
     51	while (ptes--)
     52		VMM_WO032(pt, vmm, 8 + (ptei++ * 4), *map->dma++ | 0x00000003);
     53	nvkm_done(pt->memory);
     54#else
     55	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
     56#endif
     57}
     58
     59static void
     60nv04_vmm_pgt_unmap(struct nvkm_vmm *vmm,
     61		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
     62{
     63	VMM_FO032(pt, vmm, 8 + (ptei * 4), 0, ptes);
     64}
     65
     66static const struct nvkm_vmm_desc_func
     67nv04_vmm_desc_pgt = {
     68	.unmap = nv04_vmm_pgt_unmap,
     69	.dma = nv04_vmm_pgt_dma,
     70	.sgl = nv04_vmm_pgt_sgl,
     71};
     72
     73static const struct nvkm_vmm_desc
     74nv04_vmm_desc_12[] = {
     75	{ PGT, 15, 4, 0x1000, &nv04_vmm_desc_pgt },
     76	{}
     77};
     78
     79int
     80nv04_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
     81	       struct nvkm_vmm_map *map)
     82{
     83	union {
     84		struct nv04_vmm_map_vn vn;
     85	} *args = argv;
     86	int ret = -ENOSYS;
     87	if ((ret = nvif_unvers(ret, &argv, &argc, args->vn)))
     88		VMM_DEBUG(vmm, "args");
     89	return ret;
     90}
     91
     92static const struct nvkm_vmm_func
     93nv04_vmm = {
     94	.valid = nv04_vmm_valid,
     95	.page = {
     96		{ 12, &nv04_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
     97		{}
     98	}
     99};
    100
    101int
    102nv04_vmm_new_(const struct nvkm_vmm_func *func, struct nvkm_mmu *mmu,
    103	      u32 pd_header, bool managed, u64 addr, u64 size,
    104	      void *argv, u32 argc, struct lock_class_key *key,
    105	      const char *name, struct nvkm_vmm **pvmm)
    106{
    107	union {
    108		struct nv04_vmm_vn vn;
    109	} *args = argv;
    110	int ret;
    111
    112	ret = nvkm_vmm_new_(func, mmu, pd_header, managed, addr, size,
    113			    key, name, pvmm);
    114	if (ret)
    115		return ret;
    116
    117	return nvif_unvers(-ENOSYS, &argv, &argc, args->vn);
    118}
    119
    120int
    121nv04_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
    122	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
    123	     struct nvkm_vmm **pvmm)
    124{
    125	struct nvkm_memory *mem;
    126	struct nvkm_vmm *vmm;
    127	int ret;
    128
    129	ret = nv04_vmm_new_(&nv04_vmm, mmu, 8, managed, addr, size,
    130			    argv, argc, key, name, &vmm);
    131	*pvmm = vmm;
    132	if (ret)
    133		return ret;
    134
    135	mem = vmm->pd->pt[0]->memory;
    136	nvkm_kmap(mem);
    137	nvkm_wo32(mem, 0x00000, 0x0002103d); /* PCI, RW, PT, !LN */
    138	nvkm_wo32(mem, 0x00004, vmm->limit - 1);
    139	nvkm_done(mem);
    140	return 0;
    141}