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From d0dfc05aa3789cbc2a1a2057ae4f5aae0913ae3d Mon Sep 17 00:00:00 2001
From: David Stevens <stevensd@chromium.org>
Date: Thu, 13 Oct 2022 10:37:47 +0900
Subject: [PATCH 3/4] vhost_user: add protocol flag for shmem
SPDX-FileCopyrightText: 2019-2021 Alibaba Cloud. All rights reserved.
SPDX-FileCopyrightText: The Chromium OS Authors
SPDX-FileCopyrightText: 2023 Alyssa Ross <hi@alyssa.is>
SPDX-License-Identifier: Apache-2.0
Add a vhost protocol feature flag for shared memory region support. This
is necessary to avoid sending the GET_SHARED_MEMORY_REGIONS message to
backends which don't support it.
BUG=b:252901073
TEST=crosvm device wl
Change-Id: I044926e982526c3c76063b5386cab0db72524707
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3951472
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: David Stevens <stevensd@chromium.org>
(cherry-picked from commit 60aa43629ae9be2cc3df37c648ab7e0e5ff2172c)
Signed-off-by: Alyssa Ross <hi@alyssa.is>
---
vhost/src/vhost_user/message.rs | 2 ++
1 file changed, 2 insertions(+)
diff --git a/vhost/src/vhost_user/message.rs b/vhost/src/vhost_user/message.rs
index 67fc19a..7815d3e 100644
--- a/vhost/src/vhost_user/message.rs
+++ b/vhost/src/vhost_user/message.rs
@@ -440,6 +440,8 @@ bitflags! {
const STATUS = 0x0001_0000;
/// Support Xen mmap.
const XEN_MMAP = 0x0002_0000;
+ /// Support shared memory regions.
+ const SHARED_MEMORY_REGIONS = 0x0002_0000;
}
}
--
2.43.0
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