diff options
| -rw-r--r-- | drivers/gpu/drm/radeon/evergreen_cs.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c index 18ddd752b64b..0d3f744de35a 100644 --- a/drivers/gpu/drm/radeon/evergreen_cs.c +++ b/drivers/gpu/drm/radeon/evergreen_cs.c @@ -3483,6 +3483,27 @@ static int evergreen_vm_packet3_check(struct radeon_device *rdev, } } break; + case PACKET3_SET_APPEND_CNT: { + uint32_t areg; + uint32_t allowed_reg_base; + + if (pkt->count != 2) { + DRM_ERROR("bad SET_APPEND_CNT (invalid count)\n"); + return -EINVAL; + } + + allowed_reg_base = GDS_APPEND_COUNT_0; + allowed_reg_base -= PACKET3_SET_CONTEXT_REG_START; + allowed_reg_base >>= 2; + + areg = idx_value >> 16; + if (areg < allowed_reg_base || areg > (allowed_reg_base + 11)) { + DRM_ERROR("forbidden register for append cnt 0x%08x at %d\n", + areg, idx); + return -EINVAL; + } + break; + } default: return -EINVAL; } |