From a623fefea6916de228395249031851b743f77b9f Mon Sep 17 00:00:00 2001
From: Matej Hrica <mhrica@redhat.com>
Date: Wed, 10 Dec 2025 18:10:41 +0100
Subject: [PATCH] gpu: Only enable VIRGL if the user specified it in the
 capsets

Signed-off-by: Matej Hrica <mhrica@redhat.com>
---
 vhost-device-gpu/src/backend/virgl.rs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/vhost-device-gpu/src/backend/virgl.rs b/vhost-device-gpu/src/backend/virgl.rs
index edbb8b3..70ae230 100644
--- a/vhost-device-gpu/src/backend/virgl.rs
+++ b/vhost-device-gpu/src/backend/virgl.rs
@@ -4,16 +4,16 @@
 //
 // SPDX-License-Identifier: Apache-2.0 or BSD-3-Clause
 
+use bitflags::Flags;
+use libc::c_void;
+use log::{debug, error, trace, warn};
+use rutabaga_gfx::RutabagaFence;
 use std::{
     collections::BTreeMap,
     io::IoSliceMut,
     os::fd::{AsFd, FromRawFd, IntoRawFd, RawFd},
     sync::{Arc, Mutex},
 };
-
-use libc::c_void;
-use log::{debug, error, trace, warn};
-use rutabaga_gfx::RutabagaFence;
 use vhost::vhost_user::{
     gpu_message::{
         VhostUserGpuCursorPos, VhostUserGpuDMABUFScanout, VhostUserGpuDMABUFScanout2,
@@ -155,9 +155,10 @@ impl VirglRendererAdapter {
     ) -> Self {
         let capsets = config.capsets();
         let venus_enabled = capsets.contains(GpuCapset::VENUS);
+        let virgl_enabled = !(capsets & (GpuCapset::VIRGL | GpuCapset::VIRGL2)).is_empty();
 
         let virglrenderer_flags = VirglRendererFlags::new()
-            .use_virgl(true)
+            .use_virgl(virgl_enabled)
             .use_venus(venus_enabled)
             .use_render_server(venus_enabled)
             .use_egl(config.flags().use_egl)