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drm/i915: Enable register whitelist checks 

MI_STORE_REGISTER_MEM, MI_LOAD_REGISTER_MEM, and MI_LOAD_REGISTER_IMM
commands allow userspace access to registers. Only certain registers
should be allowed for such access, so enable checking for those commands.
Each ring gets its own register whitelist.

MI_LOAD_REGISTER_REG on HSW also allows register access but is currently
unused by userspace components. Leave it rejected.

PIPE_CONTROL and MEDIA_VFE_STATE allow register access based on certain
bits being set. Reject those as well.

v2: trailing commas, rebased

OTC-Tracker: AXIA-4631
Change-Id: Ie614a2f0eb2e5917de809e5a17957175d24cc44f
Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Brad Volkin 2014-02-18 10:15:52 -08:00 committed by Daniel Vetter
parent 220375aa12
commit f0a346bdaf
2 changed files with 21 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/gpu/drm/i915/i915_cmd_parser.c
View File

@ -122,9 +122,12 @@ static const struct drm_i915_cmd_descriptor common_cmds[] = {
CMD( MI_SUSPEND_FLUSH, SMI, F, 1, S ),
CMD( MI_SEMAPHORE_MBOX, SMI, !F, 0xFF, R ),
CMD( MI_STORE_DWORD_INDEX, SMI, !F, 0xFF, R ),
CMD( MI_LOAD_REGISTER_IMM(1), SMI, !F, 0xFF, R ),
CMD( MI_STORE_REGISTER_MEM(1), SMI, !F, 0xFF, R ),
CMD( MI_LOAD_REGISTER_MEM, SMI, !F, 0xFF, R ),
CMD( MI_LOAD_REGISTER_IMM(1), SMI, !F, 0xFF, W,
.reg = { .offset = 1, .mask = 0x007FFFFC } ),
CMD( MI_STORE_REGISTER_MEM(1), SMI, !F, 0xFF, W,
.reg = { .offset = 1, .mask = 0x007FFFFC } ),
CMD( MI_LOAD_REGISTER_MEM, SMI, !F, 0xFF, W,
.reg = { .offset = 1, .mask = 0x007FFFFC } ),
CMD( MI_BATCH_BUFFER_START, SMI, !F, 0xFF, S ),
};
@ -141,9 +144,21 @@ static const struct drm_i915_cmd_descriptor render_cmds[] = {
CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, S ),
CMD( GFX_OP_3DSTATE_VF_STATISTICS, S3D, F, 1, S ),
CMD( PIPELINE_SELECT, S3D, F, 1, S ),
CMD( MEDIA_VFE_STATE, S3D, !F, 0xFFFF, B,
.bits = {{
.offset = 2,
.mask = MEDIA_VFE_STATE_MMIO_ACCESS_MASK,
.expected = 0,
}}, ),
CMD( GPGPU_OBJECT, S3D, !F, 0xFF, S ),
CMD( GPGPU_WALKER, S3D, !F, 0xFF, S ),
CMD( GFX_OP_3DSTATE_SO_DECL_LIST, S3D, !F, 0x1FF, S ),
CMD( GFX_OP_PIPE_CONTROL(5), S3D, !F, 0xFF, B,
.bits = {{
.offset = 1,
.mask = PIPE_CONTROL_MMIO_WRITE,
.expected = 0,
}}, ),
};
static const struct drm_i915_cmd_descriptor hsw_render_cmds[] = {

3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -331,6 +331,7 @@
#define DISPLAY_PLANE_B (1<<20)
#define GFX_OP_PIPE_CONTROL(len) ((0x3<<29)|(0x3<<27)|(0x2<<24)|(len-2))
#define PIPE_CONTROL_GLOBAL_GTT_IVB (1<<24) /* gen7+ */
#define PIPE_CONTROL_MMIO_WRITE (1<<23)
#define PIPE_CONTROL_CS_STALL (1<<20)
#define PIPE_CONTROL_TLB_INVALIDATE (1<<18)
#define PIPE_CONTROL_QW_WRITE (1<<14)
@ -371,6 +372,8 @@
#define PIPELINE_SELECT ((0x3<<29)|(0x1<<27)|(0x1<<24)|(0x4<<16))
#define GFX_OP_3DSTATE_VF_STATISTICS ((0x3<<29)|(0x1<<27)|(0x0<<24)|(0xB<<16))
#define MEDIA_VFE_STATE ((0x3<<29)|(0x2<<27)|(0x0<<24)|(0x0<<16))
#define MEDIA_VFE_STATE_MMIO_ACCESS_MASK (0x18)
#define GPGPU_OBJECT ((0x3<<29)|(0x2<<27)|(0x1<<24)|(0x4<<16))
#define GPGPU_WALKER ((0x3<<29)|(0x2<<27)|(0x1<<24)|(0x5<<16))
#define GFX_OP_3DSTATE_DX9_CONSTANTF_VS \