• Jon Bloomfield's avatar
    drm/i915: Add gen9 BCS cmdparsing · 0f2f3975
    Jon Bloomfield authored
    For gen9 we enable cmdparsing on the BCS ring, specifically
    to catch inadvertent accesses to sensitive registers
    
    Unlike gen7/hsw, we use the parser only to block certain
    registers. We can rely on h/w to block restricted commands,
    so the command tables only provide enough info to allow the
    parser to delineate each command, and identify commands that
    access registers.
    
    Note: This patch deliberately ignores checkpatch issues in
    favour of matching the style of the surrounding code. We'll
    correct the entire file in one go in a later patch.
    
    v3: rebase (Mika)
    v4: Add RING_TIMESTAMP registers to whitelist (Jon)
    Signed-off-by: default avatarJon Bloomfield <jon.bloomfield@intel.com>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: Dave Airlie <airlied@redhat.com>
    Cc: Takashi Iwai <tiwai@suse.de>
    Cc: Tyler Hicks <tyhicks@canonical.com>
    Signed-off-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
    Reviewed-by: default avatarChris Wilson <chris.p.wilson@intel.com>
    0f2f3975
i915_cmd_parser.c 44.1 KB