This is a note to let you know that I've just added the patch titled
Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drivers-hv-vmbus-negotiate-version-3.0-when-running-on-ws2012r2-hosts.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 03367ef5ea811475187a0732aada068919e14d61 Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Date: Thu, 3 Apr 2014 18:02:45 -0700
Subject: Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts
From: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
commit 03367ef5ea811475187a0732aada068919e14d61 upstream.
Only ws2012r2 hosts support the ability to reconnect to the host on VMBUS. This functionality
is needed by kexec in Linux. To use this functionality we need to negotiate version 3.0 of the
VMBUS protocol.
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hv/connection.c | 5 ++++-
include/linux/hyperv.h | 4 +++-
2 files changed, 7 insertions(+), 2 deletions(-)
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -55,6 +55,9 @@ static __u32 vmbus_get_next_version(__u3
case (VERSION_WIN8):
return VERSION_WIN7;
+ case (VERSION_WIN8_1):
+ return VERSION_WIN8;
+
case (VERSION_WS2008):
default:
return VERSION_INVAL;
@@ -77,7 +80,7 @@ static int vmbus_negotiate_version(struc
msg->interrupt_page = virt_to_phys(vmbus_connection.int_page);
msg->monitor_page1 = virt_to_phys(vmbus_connection.monitor_pages[0]);
msg->monitor_page2 = virt_to_phys(vmbus_connection.monitor_pages[1]);
- if (version == VERSION_WIN8)
+ if (version == VERSION_WIN8_1)
msg->target_vcpu = hv_context.vp_index[smp_processor_id()];
/*
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -464,15 +464,17 @@ hv_get_ringbuffer_availbytes(struct hv_r
* 0 . 13 (Windows Server 2008)
* 1 . 1 (Windows 7)
* 2 . 4 (Windows 8)
+ * 3 . 0 (Windows 8 R2)
*/
#define VERSION_WS2008 ((0 << 16) | (13))
#define VERSION_WIN7 ((1 << 16) | (1))
#define VERSION_WIN8 ((2 << 16) | (4))
+#define VERSION_WIN8_1 ((3 << 16) | (0))
#define VERSION_INVAL -1
-#define VERSION_CURRENT VERSION_WIN8
+#define VERSION_CURRENT VERSION_WIN8_1
/* Make maximum size of pipe payload of 16K */
#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)
Patches currently in stable-queue which might be from kys@xxxxxxxxxxxxx are
queue-3.14/drivers-hv-vmbus-negotiate-version-3.0-when-running-on-ws2012r2-hosts.patch
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