linux-kernel - [PATCH v1] drivers/virtio: Clarify CONFIG_VIRTIO

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Date:   Fri, 10 Jun 2022 11:47:37 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     virtualization@...ts.linux-foundation.org,
        David Hildenbrand <david@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>, Gavin Shan <gshan@...hat.com>
Subject: [PATCH v1] drivers/virtio: Clarify CONFIG_VIRTIO_MEM for unsupported architectures

Let's make it clearer that simply unlocking CONFIG_VIRTIO_MEM on an
architecture is most probably not sufficient to have it working as
expected.

Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Cc: Gavin Shan <gshan@...hat.com>
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 drivers/virtio/Kconfig | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index b5adf6abd241..f86b6a988b63 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -115,9 +115,11 @@ config VIRTIO_MEM
 	 This driver provides access to virtio-mem paravirtualized memory
 	 devices, allowing to hotplug and hotunplug memory.
 
-	 This driver was only tested under x86-64 and arm64, but should
-	 theoretically work on all architectures that support memory hotplug
-	 and hotremove.
+	 This driver currently only supports x86-64 and arm64. Although it
+	 should compile on other architectures that implement memory
+	 hot(un)plug, architecture-specific and/or common
+	 code changes may be required for virtio-mem, kdump and kexec to work as
+	 expected.
 
 	 If unsure, say M.
 
-- 
2.35.3