From 114d4f700878405a9fd65a6ade4f981514b82919 Mon Sep 17 00:00:00 2001 From: Brad Volkin Date: Tue, 18 Feb 2014 10:15:55 -0800 Subject: [PATCH] drm/i915: Reject commands that would store to global HWS page PIPE_CONTROL and MI_FLUSH_DW have bits that would write to the hardware status page. The driver stores request tracking info there, so don't let userspace overwrite it. v2: trailing comma fix, rebased Signed-off-by: Brad Volkin Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_cmd_parser.c | 24 +++++++++++++++++++++++- drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c index bf4ffd8826ba..a8f00dbc0dde 100644 --- a/drivers/gpu/drm/i915/i915_cmd_parser.c +++ b/drivers/gpu/drm/i915/i915_cmd_parser.c @@ -193,7 +193,8 @@ static const struct drm_i915_cmd_descriptor render_cmds[] = { }, { .offset = 1, - .mask = PIPE_CONTROL_GLOBAL_GTT_IVB, + .mask = (PIPE_CONTROL_GLOBAL_GTT_IVB | + PIPE_CONTROL_STORE_DATA_INDEX), .expected = 0, .condition_offset = 1, .condition_mask = PIPE_CONTROL_POST_SYNC_OP_MASK, @@ -242,6 +243,13 @@ static const struct drm_i915_cmd_descriptor video_cmds[] = { .expected = 0, .condition_offset = 0, .condition_mask = MI_FLUSH_DW_OP_MASK, + }, + { + .offset = 0, + .mask = MI_FLUSH_DW_STORE_INDEX, + .expected = 0, + .condition_offset = 0, + .condition_mask = MI_FLUSH_DW_OP_MASK, }}, ), CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B, .bits = {{ @@ -278,6 +286,13 @@ static const struct drm_i915_cmd_descriptor vecs_cmds[] = { .expected = 0, .condition_offset = 0, .condition_mask = MI_FLUSH_DW_OP_MASK, + }, + { + .offset = 0, + .mask = MI_FLUSH_DW_STORE_INDEX, + .expected = 0, + .condition_offset = 0, + .condition_mask = MI_FLUSH_DW_OP_MASK, }}, ), CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B, .bits = {{ @@ -308,6 +323,13 @@ static const struct drm_i915_cmd_descriptor blt_cmds[] = { .expected = 0, .condition_offset = 0, .condition_mask = MI_FLUSH_DW_OP_MASK, + }, + { + .offset = 0, + .mask = MI_FLUSH_DW_STORE_INDEX, + .expected = 0, + .condition_offset = 0, + .condition_mask = MI_FLUSH_DW_OP_MASK, }}, ), CMD( COLOR_BLT, S2D, !F, 0x3F, S ), CMD( SRC_COPY_BLT, S2D, !F, 0x3F, S ), diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 899bb4434d43..bd7636604f7e 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -336,6 +336,7 @@ #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_STORE_DATA_INDEX (1<<21) #define PIPE_CONTROL_CS_STALL (1<<20) #define PIPE_CONTROL_TLB_INVALIDATE (1<<18) #define PIPE_CONTROL_QW_WRITE (1<<14) -- 2.39.5