diff options
| author | Zack Rusin <zackr@vmware.com> | 2022-12-01 12:53:41 -0500 |
|---|---|---|
| committer | Zack Rusin <zackr@vmware.com> | 2022-12-05 13:59:38 -0500 |
| commit | 6e90293618ed476d6b11f82ce724efbb9e9a071b (patch) | |
| tree | 956ab76f8a435c49abb358b42f2e7b5f85847f58 | |
| parent | 09bf649a74573cb596e211418a4f8008f265c5a9 (diff) | |
| download | linux-loongson-6e90293618ed476d6b11f82ce724efbb9e9a071b.tar.gz | |
drm/vmwgfx: Don't use screen objects when SEV is active
When SEV is enabled gmr's and mob's are explicitly disabled because
the encrypted system memory can not be used by the hypervisor.
The driver was disabling GMR's but the presentation code, which depends
on GMR's, wasn't honoring it which lead to black screen on hosts
with SEV enabled.
Make sure screen objects presentation is not used when guest memory
regions have been disabled to fix presentation on SEV enabled hosts.
Fixes: 3b0d6458c705 ("drm/vmwgfx: Refuse DMA operation when SEV encryption is active")
Cc: <stable@vger.kernel.org> # v5.7+
Signed-off-by: Zack Rusin <zackr@vmware.com>
Reported-by: Nicholas Hunt <nhunt@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221201175341.491884-1-zack@kde.org
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c index ecd3c2fc978b23..9c79873f62f069 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c @@ -949,6 +949,10 @@ int vmw_kms_sou_init_display(struct vmw_private *dev_priv) struct drm_device *dev = &dev_priv->drm; int i, ret; + /* Screen objects won't work if GMR's aren't available */ + if (!dev_priv->has_gmr) + return -ENOSYS; + if (!(dev_priv->capabilities & SVGA_CAP_SCREEN_OBJECT_2)) { return -ENOSYS; } |