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drm/tests/amdgpu/security_tests.c

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/*
* Copyright 2019 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "CUnit/Basic.h"
#include "amdgpu_test.h"
#include "amdgpu_drm.h"
#include "amdgpu_internal.h"
#include <string.h>
#include <unistd.h>
#ifdef __FreeBSD__
#include <sys/endian.h>
#else
#include <endian.h>
#endif
#include <strings.h>
#include <xf86drm.h>
static amdgpu_device_handle device_handle;
static uint32_t major_version;
static uint32_t minor_version;
static struct drm_amdgpu_info_hw_ip sdma_info;
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(_Arr) (sizeof(_Arr)/sizeof((_Arr)[0]))
#endif
/* --------------------- Secure bounce test ------------------------ *
*
* The secure bounce test tests that we can evict a TMZ buffer,
* and page it back in, via a bounce buffer, as it encryption/decryption
* depends on its physical address, and have the same data, i.e. data
* integrity is preserved.
*
* The steps are as follows (from Christian K.):
*
* Buffer A which is TMZ protected and filled by the CPU with a
* certain pattern. That the GPU is reading only random nonsense from
* that pattern is irrelevant for the test.
*
* This buffer A is then secure copied into buffer B which is also
* TMZ protected.
*
* Buffer B is moved around, from VRAM to GTT, GTT to SYSTEM,
* etc.
*
* Then, we use another secure copy of buffer B back to buffer A.
*
* And lastly we check with the CPU the pattern.
*
* Assuming that we don't have memory contention and buffer A stayed
* at the same place, we should still see the same pattern when read
* by the CPU.
*
* If we don't see the same pattern then something in the buffer
* migration code is not working as expected.
*/
#define SECURE_BOUNCE_TEST_STR "secure bounce"
#define SECURE_BOUNCE_FAILED_STR SECURE_BOUNCE_TEST_STR " failed"
#define PRINT_ERROR(_Res) fprintf(stderr, "%s:%d: %s (%d)\n", \
__func__, __LINE__, strerror(-(_Res)), _Res)
#define PACKET_LCOPY_SIZE 7
#define PACKET_NOP_SIZE 12
struct sec_amdgpu_bo {
struct amdgpu_bo *bo;
struct amdgpu_va *va;
};
struct command_ctx {
struct amdgpu_device *dev;
struct amdgpu_cs_ib_info cs_ibinfo;
struct amdgpu_cs_request cs_req;
struct amdgpu_context *context;
int ring_id;
};
/**
* amdgpu_bo_alloc_map -- Allocate and map a buffer object (BO)
* @dev: The AMDGPU device this BO belongs to.
* @size: The size of the BO.
* @alignment: Alignment of the BO.
* @gem_domain: One of AMDGPU_GEM_DOMAIN_xyz.
* @alloc_flags: One of AMDGPU_GEM_CREATE_xyz.
* @sbo: the result
*
* Allocate a buffer object (BO) with the desired attributes
* as specified by the argument list and write out the result
* into @sbo.
*
* Return 0 on success and @sbo->bo and @sbo->va are set,
* or -errno on error.
*/
static int amdgpu_bo_alloc_map(struct amdgpu_device *dev,
unsigned size,
unsigned alignment,
unsigned gem_domain,
uint64_t alloc_flags,
struct sec_amdgpu_bo *sbo)
{
void *cpu;
uint64_t mc_addr;
return amdgpu_bo_alloc_and_map_raw(dev,
size,
alignment,
gem_domain,
alloc_flags,
0,
&sbo->bo,
&cpu, &mc_addr,
&sbo->va);
}
static void amdgpu_bo_unmap_free(struct sec_amdgpu_bo *sbo,
const uint64_t size)
{
(void) amdgpu_bo_unmap_and_free(sbo->bo,
sbo->va,
sbo->va->address,
size);
sbo->bo = NULL;
sbo->va = NULL;
}
static void amdgpu_sdma_lcopy(uint32_t *packet,
const uint64_t dst,
const uint64_t src,
const uint32_t size,
const int secure)
{
/* Set the packet to Linear copy with TMZ set.
*/
packet[0] = htole32(secure << 18 | 1);
packet[1] = htole32(size-1);
packet[2] = htole32(0);
packet[3] = htole32((uint32_t)(src & 0xFFFFFFFFU));
packet[4] = htole32((uint32_t)(src >> 32));
packet[5] = htole32((uint32_t)(dst & 0xFFFFFFFFU));
packet[6] = htole32((uint32_t)(dst >> 32));
}
static void amdgpu_sdma_nop(uint32_t *packet, uint32_t nop_count)
{
/* A packet of the desired number of NOPs.
*/
packet[0] = htole32(nop_count << 16);
for ( ; nop_count > 0; nop_count--)
packet[nop_count-1] = 0;
}
/**
* amdgpu_bo_lcopy -- linear copy with TMZ set, using sDMA
* @dev: AMDGPU device to which both buffer objects belong to
* @dst: destination buffer object
* @src: source buffer object
* @size: size of memory to move, in bytes.
* @secure: Set to 1 to perform secure copy, 0 for clear
*
* Issues and waits for completion of a Linear Copy with TMZ
* set, to the sDMA engine. @size should be a multiple of
* at least 16 bytes.
*/
static void amdgpu_bo_lcopy(struct command_ctx *ctx,
struct sec_amdgpu_bo *dst,
struct sec_amdgpu_bo *src,
const uint32_t size,
int secure)
{
struct amdgpu_bo *bos[] = { dst->bo, src->bo };
uint32_t packet[PACKET_LCOPY_SIZE];
amdgpu_sdma_lcopy(packet,
dst->va->address,
src->va->address,
size, secure);
amdgpu_test_exec_cs_helper_raw(ctx->dev, ctx->context,
AMDGPU_HW_IP_DMA, ctx->ring_id,
ARRAY_SIZE(packet), packet,
ARRAY_SIZE(bos), bos,
&ctx->cs_ibinfo, &ctx->cs_req,
secure == 1);
}
/**
* amdgpu_bo_move -- Evoke a move of the buffer object (BO)
* @dev: device to which this buffer object belongs to
* @bo: the buffer object to be moved
* @whereto: one of AMDGPU_GEM_DOMAIN_xyz
* @secure: set to 1 to submit secure IBs
*
* Evokes a move of the buffer object @bo to the GEM domain
* descibed by @whereto.
*
* Returns 0 on sucess; -errno on error.
*/
static int amdgpu_bo_move(struct command_ctx *ctx,
struct amdgpu_bo *bo,
uint64_t whereto,
int secure)
{
struct amdgpu_bo *bos[] = { bo };
struct drm_amdgpu_gem_op gop = {
.handle = bo->handle,
.op = AMDGPU_GEM_OP_SET_PLACEMENT,
.value = whereto,
};
uint32_t packet[PACKET_NOP_SIZE];
int res;
/* Change the buffer's placement.
*/
res = drmIoctl(ctx->dev->fd, DRM_IOCTL_AMDGPU_GEM_OP, &gop);
if (res)
return -errno;
/* Now issue a NOP to actually evoke the MM to move
* it to the desired location.
*/
amdgpu_sdma_nop(packet, PACKET_NOP_SIZE);
amdgpu_test_exec_cs_helper_raw(ctx->dev, ctx->context,
AMDGPU_HW_IP_DMA, ctx->ring_id,
ARRAY_SIZE(packet), packet,
ARRAY_SIZE(bos), bos,
&ctx->cs_ibinfo, &ctx->cs_req,
secure == 1);
return 0;
}
/* Safe, O Sec!
*/
static const uint8_t secure_pattern[] = { 0x5A, 0xFE, 0x05, 0xEC };
#define SECURE_BUFFER_SIZE (4 * 1024 * sizeof(secure_pattern))
static void amdgpu_secure_bounce(void)
{
struct sec_amdgpu_bo alice, bob;
struct command_ctx sb_ctx;
long page_size;
uint8_t *pp;
int res;
page_size = sysconf(_SC_PAGESIZE);
memset(&sb_ctx, 0, sizeof(sb_ctx));
sb_ctx.dev = device_handle;
res = amdgpu_cs_ctx_create(sb_ctx.dev, &sb_ctx.context);
if (res) {
PRINT_ERROR(res);
CU_FAIL(SECURE_BOUNCE_FAILED_STR);
return;
}
/* Use the first present ring.
*/
res = ffs(sdma_info.available_rings) - 1;
if (res == -1) {
PRINT_ERROR(-ENOENT);
CU_FAIL(SECURE_BOUNCE_FAILED_STR);
goto Out_free_ctx;
}
sb_ctx.ring_id = res;
/* Allocate a buffer named Alice in VRAM.
*/
res = amdgpu_bo_alloc_map(device_handle,
SECURE_BUFFER_SIZE,
page_size,
AMDGPU_GEM_DOMAIN_VRAM,
AMDGPU_GEM_CREATE_ENCRYPTED,
&alice);
if (res) {
PRINT_ERROR(res);
CU_FAIL(SECURE_BOUNCE_FAILED_STR);
return;
}
/* Fill Alice with a pattern.
*/
for (pp = alice.bo->cpu_ptr;
pp < (__typeof__(pp)) alice.bo->cpu_ptr + SECURE_BUFFER_SIZE;
pp += sizeof(secure_pattern))
memcpy(pp, secure_pattern, sizeof(secure_pattern));
/* Allocate a buffer named Bob in VRAM.
*/
res = amdgpu_bo_alloc_map(device_handle,
SECURE_BUFFER_SIZE,
page_size,
AMDGPU_GEM_DOMAIN_VRAM,
AMDGPU_GEM_CREATE_ENCRYPTED,
&bob);
if (res) {
PRINT_ERROR(res);
CU_FAIL(SECURE_BOUNCE_FAILED_STR);
goto Out_free_Alice;
}
/* sDMA TMZ copy from Alice to Bob.
*/
amdgpu_bo_lcopy(&sb_ctx, &bob, &alice, SECURE_BUFFER_SIZE, 1);
/* Move Bob to the GTT domain.
*/
res = amdgpu_bo_move(&sb_ctx, bob.bo, AMDGPU_GEM_DOMAIN_GTT, 0);
if (res) {
PRINT_ERROR(res);
CU_FAIL(SECURE_BOUNCE_FAILED_STR);
goto Out_free_all;
}
/* sDMA TMZ copy from Bob to Alice.
*/
amdgpu_bo_lcopy(&sb_ctx, &alice, &bob, SECURE_BUFFER_SIZE, 1);
/* Verify the contents of Alice.
*/
for (pp = alice.bo->cpu_ptr;
pp < (__typeof__(pp)) alice.bo->cpu_ptr + SECURE_BUFFER_SIZE;
pp += sizeof(secure_pattern)) {
res = memcmp(pp, secure_pattern, sizeof(secure_pattern));
if (res) {
fprintf(stderr, SECURE_BOUNCE_FAILED_STR);
CU_FAIL(SECURE_BOUNCE_FAILED_STR);
break;
}
}
Out_free_all:
amdgpu_bo_unmap_free(&bob, SECURE_BUFFER_SIZE);
Out_free_Alice:
amdgpu_bo_unmap_free(&alice, SECURE_BUFFER_SIZE);
Out_free_ctx:
res = amdgpu_cs_ctx_free(sb_ctx.context);
CU_ASSERT_EQUAL(res, 0);
}
/* ----------------------------------------------------------------- */
static void amdgpu_security_alloc_buf_test(void)
{
amdgpu_bo_handle bo;
amdgpu_va_handle va_handle;
uint64_t bo_mc;
int r;
/* Test secure buffer allocation in VRAM */
bo = gpu_mem_alloc(device_handle, 4096, 4096,
AMDGPU_GEM_DOMAIN_VRAM,
AMDGPU_GEM_CREATE_ENCRYPTED,
&bo_mc, &va_handle);
r = gpu_mem_free(bo, va_handle, bo_mc, 4096);
CU_ASSERT_EQUAL(r, 0);
/* Test secure buffer allocation in system memory */
bo = gpu_mem_alloc(device_handle, 4096, 4096,
AMDGPU_GEM_DOMAIN_GTT,
AMDGPU_GEM_CREATE_ENCRYPTED,
&bo_mc, &va_handle);
r = gpu_mem_free(bo, va_handle, bo_mc, 4096);
CU_ASSERT_EQUAL(r, 0);
/* Test secure buffer allocation in invisible VRAM */
bo = gpu_mem_alloc(device_handle, 4096, 4096,
AMDGPU_GEM_DOMAIN_GTT,
AMDGPU_GEM_CREATE_ENCRYPTED |
AMDGPU_GEM_CREATE_NO_CPU_ACCESS,
&bo_mc, &va_handle);
r = gpu_mem_free(bo, va_handle, bo_mc, 4096);
CU_ASSERT_EQUAL(r, 0);
}
static void amdgpu_security_gfx_submission_test(void)
{
amdgpu_command_submission_write_linear_helper_with_secure(device_handle,
AMDGPU_HW_IP_GFX,
true);
}
static void amdgpu_security_sdma_submission_test(void)
{
amdgpu_command_submission_write_linear_helper_with_secure(device_handle,
AMDGPU_HW_IP_DMA,
true);
}
/* ----------------------------------------------------------------- */
CU_TestInfo security_tests[] = {
{ "allocate secure buffer test", amdgpu_security_alloc_buf_test },
{ "graphics secure command submission", amdgpu_security_gfx_submission_test },
{ "sDMA secure command submission", amdgpu_security_sdma_submission_test },
{ SECURE_BOUNCE_TEST_STR, amdgpu_secure_bounce },
CU_TEST_INFO_NULL,
};
CU_BOOL suite_security_tests_enable(void)
{
CU_BOOL enable = CU_TRUE;
if (amdgpu_device_initialize(drm_amdgpu[0], &major_version,
&minor_version, &device_handle))
return CU_FALSE;
if (!(device_handle->dev_info.ids_flags & AMDGPU_IDS_FLAGS_TMZ)) {
printf("\n\nDon't support TMZ (trust memory zone), security suite disabled\n");
enable = CU_FALSE;
}
if ((major_version < 3) ||
((major_version == 3) && (minor_version < 37))) {
printf("\n\nDon't support TMZ (trust memory zone), kernel DRM version (%d.%d)\n",
major_version, minor_version);
printf("is older, security suite disabled\n");
enable = CU_FALSE;
}
if (amdgpu_device_deinitialize(device_handle))
return CU_FALSE;
return enable;
}
int suite_security_tests_init(void)
{
int res;
res = amdgpu_device_initialize(drm_amdgpu[0], &major_version,
&minor_version, &device_handle);
if (res) {
PRINT_ERROR(res);
return CUE_SINIT_FAILED;
}
res = amdgpu_query_hw_ip_info(device_handle,
AMDGPU_HW_IP_DMA,
0, &sdma_info);
if (res) {
PRINT_ERROR(res);
return CUE_SINIT_FAILED;
}
return CUE_SUCCESS;
}
int suite_security_tests_clean(void)
{
int res;
res = amdgpu_device_deinitialize(device_handle);
if (res)
return CUE_SCLEAN_FAILED;
return CUE_SUCCESS;
}
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