* granting userspace undue privileges. There are three categories of privilege.
*
* First, commands which are explicitly defined as privileged or which should
- * only be used by the kernel driver. The parser generally rejects such
- * commands, though it may allow some from the drm master process.
+ * only be used by the kernel driver. The parser rejects such commands
*
* Second, commands which access registers. To support correct/enhanced
* userspace functionality, particularly certain OpenGL extensions, the parser
- * provides a whitelist of registers which userspace may safely access (for both
- * normal and drm master processes).
+ * provides a whitelist of registers which userspace may safely access
*
* Third, commands which access privileged memory (i.e. GGTT, HWS page, etc).
* The parser always rejects such commands.
* in the per-engine command tables.
*
* Other command table entries map fairly directly to high level categories
- * mentioned above: rejected, master-only, register whitelist. The parser
- * implements a number of checks, including the privileged memory checks, via a
- * general bitmasking mechanism.
+ * mentioned above: rejected, register whitelist. The parser implements a number
+ * of checks, including the privileged memory checks, via a general bitmasking
+ * mechanism.
*/
/*
* CMD_DESC_REJECT: The command is never allowed
* CMD_DESC_REGISTER: The command should be checked against the
* register whitelist for the appropriate ring
- * CMD_DESC_MASTER: The command is allowed if the submitting process
- * is the DRM master
*/
u32 flags;
#define CMD_DESC_FIXED (1<<0)
#define CMD_DESC_REJECT (1<<2)
#define CMD_DESC_REGISTER (1<<3)
#define CMD_DESC_BITMASK (1<<4)
-#define CMD_DESC_MASTER (1<<5)
/*
* The command's unique identification bits and the bitmask to get them.
#define R CMD_DESC_REJECT
#define W CMD_DESC_REGISTER
#define B CMD_DESC_BITMASK
-#define M CMD_DESC_MASTER
/* Command Mask Fixed Len Action
---------------------------------------------------------- */
static const struct drm_i915_cmd_descriptor gen7_common_cmds[] = {
CMD( MI_NOOP, SMI, F, 1, S ),
CMD( MI_USER_INTERRUPT, SMI, F, 1, R ),
- CMD( MI_WAIT_FOR_EVENT, SMI, F, 1, M ),
+ CMD( MI_WAIT_FOR_EVENT, SMI, F, 1, R ),
CMD( MI_ARB_CHECK, SMI, F, 1, S ),
CMD( MI_REPORT_HEAD, SMI, F, 1, S ),
CMD( MI_SUSPEND_FLUSH, SMI, F, 1, S ),
CMD( MI_URB_ATOMIC_ALLOC, SMI, F, 1, S ),
CMD( MI_SET_APPID, SMI, F, 1, S ),
CMD( MI_RS_CONTEXT, SMI, F, 1, S ),
- CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, M ),
+ CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, R ),
CMD( MI_LOAD_SCAN_LINES_EXCL, SMI, !F, 0x3F, R ),
CMD( MI_LOAD_REGISTER_REG, SMI, !F, 0xFF, W,
.reg = { .offset = 1, .mask = 0x007FFFFC, .step = 1 } ),
};
static const struct drm_i915_cmd_descriptor hsw_blt_cmds[] = {
- CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, M ),
+ CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, R ),
CMD( MI_LOAD_SCAN_LINES_EXCL, SMI, !F, 0x3F, R ),
};
#undef R
#undef W
#undef B
-#undef M
static const struct drm_i915_cmd_table gen7_render_cmd_table[] = {
{ gen7_common_cmds, ARRAY_SIZE(gen7_common_cmds) },
REG64_IDX(RING_TIMESTAMP, BLT_RING_BASE),
};
-static const struct drm_i915_reg_descriptor ivb_master_regs[] = {
- REG32(FORCEWAKE_MT),
- REG32(DERRMR),
- REG32(GEN7_PIPE_DE_LOAD_SL(PIPE_A)),
- REG32(GEN7_PIPE_DE_LOAD_SL(PIPE_B)),
- REG32(GEN7_PIPE_DE_LOAD_SL(PIPE_C)),
-};
-
-static const struct drm_i915_reg_descriptor hsw_master_regs[] = {
- REG32(FORCEWAKE_MT),
- REG32(DERRMR),
-};
-
#undef REG64
#undef REG32
struct drm_i915_reg_table {
const struct drm_i915_reg_descriptor *regs;
int num_regs;
- bool master;
};
static const struct drm_i915_reg_table ivb_render_reg_tables[] = {
- { gen7_render_regs, ARRAY_SIZE(gen7_render_regs), false },
- { ivb_master_regs, ARRAY_SIZE(ivb_master_regs), true },
+ { gen7_render_regs, ARRAY_SIZE(gen7_render_regs) },
};
static const struct drm_i915_reg_table ivb_blt_reg_tables[] = {
- { gen7_blt_regs, ARRAY_SIZE(gen7_blt_regs), false },
- { ivb_master_regs, ARRAY_SIZE(ivb_master_regs), true },
+ { gen7_blt_regs, ARRAY_SIZE(gen7_blt_regs) },
};
static const struct drm_i915_reg_table hsw_render_reg_tables[] = {
- { gen7_render_regs, ARRAY_SIZE(gen7_render_regs), false },
- { hsw_render_regs, ARRAY_SIZE(hsw_render_regs), false },
- { hsw_master_regs, ARRAY_SIZE(hsw_master_regs), true },
+ { gen7_render_regs, ARRAY_SIZE(gen7_render_regs) },
+ { hsw_render_regs, ARRAY_SIZE(hsw_render_regs) },
};
static const struct drm_i915_reg_table hsw_blt_reg_tables[] = {
- { gen7_blt_regs, ARRAY_SIZE(gen7_blt_regs), false },
- { hsw_master_regs, ARRAY_SIZE(hsw_master_regs), true },
+ { gen7_blt_regs, ARRAY_SIZE(gen7_blt_regs) },
};
static u32 gen7_render_get_cmd_length_mask(u32 cmd_header)
}
static const struct drm_i915_reg_descriptor *
-find_reg(const struct intel_engine_cs *engine, bool is_master, u32 addr)
+find_reg(const struct intel_engine_cs *engine, u32 addr)
{
const struct drm_i915_reg_table *table = engine->reg_tables;
+ const struct drm_i915_reg_descriptor *reg = NULL;
int count = engine->reg_table_count;
- for (; count > 0; ++table, --count) {
- if (!table->master || is_master) {
- const struct drm_i915_reg_descriptor *reg;
+ for (; !reg && (count > 0); ++table, --count)
+ reg = __find_reg(table->regs, table->num_regs, addr);
- reg = __find_reg(table->regs, table->num_regs, addr);
- if (reg != NULL)
- return reg;
- }
- }
-
- return NULL;
+ return reg;
}
/* Returns a vmap'd pointer to dst_obj, which the caller must unmap */
static bool check_cmd(const struct intel_engine_cs *engine,
const struct drm_i915_cmd_descriptor *desc,
- const u32 *cmd, u32 length,
- const bool is_master)
+ const u32 *cmd, u32 length)
{
if (desc->flags & CMD_DESC_SKIP)
return true;
return false;
}
- if ((desc->flags & CMD_DESC_MASTER) && !is_master) {
- DRM_DEBUG_DRIVER("CMD: Rejected master-only command: 0x%08X\n",
- *cmd);
- return false;
- }
-
if (desc->flags & CMD_DESC_REGISTER) {
/*
* Get the distance between individual register offset
offset += step) {
const u32 reg_addr = cmd[offset] & desc->reg.mask;
const struct drm_i915_reg_descriptor *reg =
- find_reg(engine, is_master, reg_addr);
+ find_reg(engine, reg_addr);
if (!reg) {
DRM_DEBUG_DRIVER("CMD: Rejected register 0x%08X in command: 0x%08X (%s)\n",
* @shadow_batch_obj: copy of the batch buffer in question
* @batch_start_offset: byte offset in the batch at which execution starts
* @batch_len: length of the commands in batch_obj
- * @is_master: is the submitting process the drm master?
*
* Parses the specified batch buffer looking for privilege violations as
* described in the overview.
struct drm_i915_gem_object *batch_obj,
struct drm_i915_gem_object *shadow_batch_obj,
u32 batch_start_offset,
- u32 batch_len,
- bool is_master)
+ u32 batch_len)
{
u32 *cmd, *batch_end;
struct drm_i915_cmd_descriptor default_desc = noop_desc;
break;
}
- if (!check_cmd(engine, desc, cmd, length, is_master)) {
+ if (!check_cmd(engine, desc, cmd, length)) {
ret = -EACCES;
break;
}
projects / linux-stable / commitdiff