Author: mav
Date: Mon Mar 16 20:13:25 2015
New Revision: 280154
URL: https://svnweb.freebsd.org/changeset/base/280154
Log:
Report that we may have write cache, and that we do support FLUSH.
FreeBSD guest driver does not use that legacy flag, but Linux seems does.
MFC after: 2 weeks
Modified:
head/usr.sbin/bhyve/pci_virtio_block.c
Modified: head/usr.sbin/bhyve/pci_virtio_block.c
==============================================================================
--- head/usr.sbin/bhyve/pci_virtio_block.c Mon Mar 16 20:00:09 2015
(r280153)
+++ head/usr.sbin/bhyve/pci_virtio_block.c Mon Mar 16 20:13:25 2015
(r280154)
@@ -64,6 +64,7 @@ __FBSDID("$FreeBSD$");
/* Capability bits */
#define VTBLK_F_SEG_MAX (1 << 2) /* Maximum request
segments */
#define VTBLK_F_BLK_SIZE (1 << 6) /* cfg block size valid
*/
+#define VTBLK_F_FLUSH (1 << 9) /* Cache flush support
*/
#define VTBLK_F_TOPOLOGY (1 << 10) /* Optimal I/O
alignment */
/*
@@ -72,6 +73,7 @@ __FBSDID("$FreeBSD$");
#define VTBLK_S_HOSTCAPS \
( VTBLK_F_SEG_MAX | \
VTBLK_F_BLK_SIZE | \
+ VTBLK_F_FLUSH | \
VTBLK_F_TOPOLOGY | \
VIRTIO_RING_F_INDIRECT_DESC ) /* indirect descriptors */
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