Commit 1df53d21 authored by Andrea Parri (Microsoft)'s avatar Andrea Parri (Microsoft) Committed by Wei Liu
Browse files

Drivers: hv: vmbus: Introduce and negotiate VMBus protocol version 5.3 



Hyper-V has added VMBus protocol version 5.3.  Allow Linux guests to
negotiate the new version on version of Hyper-V that support it.

Signed-off-by: default avatarAndrea Parri (Microsoft) <parri.andrea@gmail.com>
Reviewed-by: default avatarMichael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210416143449.16185-2-parri.andrea@gmail.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
parent 3e9bf43f

drivers/hv/connection.c

+2 −1
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ EXPORT_SYMBOL_GPL(vmbus_proto_version); 
 * Table of VMBus versions listed from newest to oldest.

 */

static __u32 vmbus_versions[] = {

	VERSION_WIN10_V5_3,

	VERSION_WIN10_V5_2,

	VERSION_WIN10_V5_1,

	VERSION_WIN10_V5,
@@ -60,7 +61,7 @@ static __u32 vmbus_versions[] = { 
 * Maximal VMBus protocol version guests can negotiate.  Useful to cap the

 * VMBus version for testing and debugging purpose.

 */

static uint max_version = VERSION_WIN10_V5_2;

static uint max_version = VERSION_WIN10_V5_3;



module_param(max_version, uint, S_IRUGO);

MODULE_PARM_DESC(max_version,

include/linux/hyperv.h

+2 −0
Original line number Diff line number Diff line
@@ -234,6 +234,7 @@ static inline u32 hv_get_avail_to_write_percent( 
 * 5 . 0  (Newer Windows 10)

 * 5 . 1  (Windows 10 RS4)

 * 5 . 2  (Windows Server 2019, RS5)

 * 5 . 3  (Windows Server 2022)

 */



#define VERSION_WS2008  ((0 << 16) | (13))
@@ -245,6 +246,7 @@ static inline u32 hv_get_avail_to_write_percent( 
#define VERSION_WIN10_V5 ((5 << 16) | (0))

#define VERSION_WIN10_V5_1 ((5 << 16) | (1))

#define VERSION_WIN10_V5_2 ((5 << 16) | (2))

#define VERSION_WIN10_V5_3 ((5 << 16) | (3))



/* Make maximum size of pipe payload of 16K */

#define MAX_PIPE_DATA_PAYLOAD		(sizeof(u8) * 16384)