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

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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: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20210416143449.16185-2-parri.andrea@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Andrea Parri (Microsoft) 2021-04-16 16:34:47 +02:00 committed by Wei Liu
parent 3e9bf43f7f
commit 1df53d212c
2 changed files with 4 additions and 1 deletions
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3
drivers/hv/connection.c
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@ -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,

2
include/linux/hyperv.h
View File

@ -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)