[src/trunk]: src/sys/dev/pci vio9p: Add definition for the MOUNT_TAG feature ...

[uwe <uwe%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/01faea38dfe9
branches:  trunk
changeset: 365205:01faea38dfe9
user:      uwe <uwe%NetBSD.org@localhost>
date:      Wed Apr 13 13:50:37 2022 +0000

description:
vio9p: Add definition for the MOUNT_TAG feature bit.

>From QEMU sources.

diffstat:

 sys/dev/pci/vio9p.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (37 lines):

diff -r 380d07cff468 -r 01faea38dfe9 sys/dev/pci/vio9p.c
--- a/sys/dev/pci/vio9p.c       Wed Apr 13 10:56:11 2022 +0000
+++ b/sys/dev/pci/vio9p.c       Wed Apr 13 13:50:37 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vio9p.c,v 1.5 2022/03/31 19:30:16 pgoyette Exp $       */
+/*     $NetBSD: vio9p.c,v 1.6 2022/04/13 13:50:37 uwe Exp $    */
 
 /*
  * Copyright (c) 2019 Internet Initiative Japan, Inc.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vio9p.c,v 1.5 2022/03/31 19:30:16 pgoyette Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vio9p.c,v 1.6 2022/04/13 13:50:37 uwe Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -60,11 +60,17 @@
 #define DLOG(fmt, args...) __nothing
 #endif
 
+/* Device-specific feature bits */
+#define VIO9P_F_MOUNT_TAG      (UINT64_C(1) << 0) /* mount tag specified */
+
 /* Configuration registers */
 #define VIO9P_CONFIG_TAG_LEN   0 /* 16bit */
 #define VIO9P_CONFIG_TAG       2
 
-#define VIO9P_FLAG_BITS                VIRTIO_COMMON_FLAG_BITS
+#define VIO9P_FLAG_BITS                                \
+       VIRTIO_COMMON_FLAG_BITS                 \
+       "b\x00" "MOUNT_TAG\0"
+
 
 // Must be the same as P9P_DEFREQLEN of usr.sbin/puffs/mount_9p/ninepuffs.h
 #define VIO9P_MAX_REQLEN       (16 * 1024)