From: Michael S. Tsirkin <mst@redhat.com>
Date: Fri, 26 Jul 2019 11:49:29 +0000 (-0400)
Subject: vhost: disable metadata prefetch optimization
X-Git-Tag: v5.3-rc3~46^2
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/73f628ec9e

vhost: disable metadata prefetch optimization

This seems to cause guest and host memory corruption.
Disable for now until we get a better handle on that.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 819296332913..42a8c2a13ab1 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -96,7 +96,7 @@ struct vhost_uaddr {
 };
 
 #if defined(CONFIG_MMU_NOTIFIER) && ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 0
-#define VHOST_ARCH_CAN_ACCEL_UACCESS 1
+#define VHOST_ARCH_CAN_ACCEL_UACCESS 0
 #else
 #define VHOST_ARCH_CAN_ACCEL_UACCESS 0
 #endif