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-Url: http://git.maquefel.me/?a=commitdiff_plain;h=73f628ec9e6bcc45b77c53fe6d0c0ec55eaf82af;p=linux.git

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 8192963329138..42a8c2a13ab1b 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