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authorThomas Hellstrom <thellstrom@vmware.com>2019-04-04 13:25:43 +0000
committerThomas Hellstrom <thellstrom@vmware.com>2019-05-21 10:23:09 +0200
commite41c20cf50a8a7d0dfa337a7530590aacef4193b (patch)
tree6a7cef5a83e5d35c89a45711d2f4a09b737852f6 /drivers/gpu
parent8407f8a1d940fe28c4243ad4f0cb6a44dcee88f6 (diff)
downloadlinux-e41c20cf50a8a7d0dfa337a7530590aacef4193b.tar.bz2
drm/vmwgfx: Fix compat mode shader operation
In compat mode, we allowed host-backed user-space with guest-backed kernel / device. In this mode, set shader commands was broken since no relocations were emitted. Fix this. Cc: <stable@vger.kernel.org> Fixes: e8c66efbfe3a ("drm/vmwgfx: Make user resource lookups reference-free during validation") Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index 2ff7ba04d8c8..315f9efce765 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -2010,6 +2010,11 @@ static int vmw_cmd_set_shader(struct vmw_private *dev_priv,
return 0;
if (cmd->body.shid != SVGA3D_INVALID_ID) {
+ /*
+ * This is the compat shader path - Per device guest-backed
+ * shaders, but user-space thinks it's per context host-
+ * backed shaders.
+ */
res = vmw_shader_lookup(vmw_context_res_man(ctx),
cmd->body.shid, cmd->body.type);
if (!IS_ERR(res)) {
@@ -2017,6 +2022,14 @@ static int vmw_cmd_set_shader(struct vmw_private *dev_priv,
VMW_RES_DIRTY_NONE);
if (unlikely(ret != 0))
return ret;
+
+ ret = vmw_resource_relocation_add
+ (sw_context, res,
+ vmw_ptr_diff(sw_context->buf_start,
+ &cmd->body.shid),
+ vmw_res_rel_normal);
+ if (unlikely(ret != 0))
+ return ret;
}
}