um: drivers: Add virtio vhost-user driver

This module allows virtio devices to be used over a vhost-user socket.

Signed-off-by: Erel Geron <erelx.geron@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

2 files changed, 8 insertions, 2 deletions

diff --git a/arch/um/include/asm/irq.h b/arch/um/include/asm/irq.h
index ce7a78c3bcf2..42c6205e2dc4 100644
--- a/arch/um/include/asm/irq.h
+++ b/arch/um/include/asm/irq.h
@@ -17,17 +17,18 @@
 #define TELNETD_IRQ             12
 #define XTERM_IRQ               13
 #define RANDOM_IRQ              14
+#define VIRTIO_IRQ              15
 
 #ifdef CONFIG_UML_NET_VECTOR
 
-#define VECTOR_BASE_IRQ         15
+#define VECTOR_BASE_IRQ         (VIRTIO_IRQ + 1)
 #define VECTOR_IRQ_SPACE        8
 
 #define LAST_IRQ (VECTOR_IRQ_SPACE + VECTOR_BASE_IRQ - 1)
 
 #else
 
-#define LAST_IRQ RANDOM_IRQ
+#define LAST_IRQ VIRTIO_IRQ
 
 #endif
 
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index fa1909365666..d542dadcf22e 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -36,6 +36,8 @@
 #define OS_LIB_PATH     "/usr/lib/"
 #endif
 
+#define OS_SENDMSG_MAX_FDS 8
+
 /*
  * types taken from stat_file() in hostfs_user.c
  * (if they are wrong here, they are wrong there...).
@@ -176,6 +178,9 @@ extern unsigned os_major(unsigned long long dev);
 extern unsigned os_minor(unsigned long long dev);
 extern unsigned long long os_makedev(unsigned major, unsigned minor);
 extern int os_falloc_punch(int fd, unsigned long long offset, int count);
+extern int os_eventfd(unsigned int initval, int flags);
+extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
+                          const int *fds, unsigned int fds_num);
 
 /* start_up.c */
 extern void os_early_checks(void);