This is a note to let you know that I've just added the patch titled
Drivers: hv: vmbus: Specify the target CPU that should receive notification
to the 3.13-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-specify-the-target-cpu-that-should-receive-notification.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e28bab4828354583bb66ac09021ca69b341a7db4 Mon Sep 17 00:00:00 2001
From: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Date: Wed, 15 Jan 2014 17:12:58 -0800
Subject: Drivers: hv: vmbus: Specify the target CPU that should receive notification
From: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
commit e28bab4828354583bb66ac09021ca69b341a7db4 upstream.
During the initial VMBUS connect phase, starting with WS2012 R2, we should
specify the VPCU in the guest that should receive the notification. Fix this
issue. This fix is required to properly connect to the host in the kexeced
kernel.
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hv/connection.c | 2 ++
include/linux/hyperv.h | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/hv/connection.c
+++ b/drivers/hv/connection.c
@@ -78,6 +78,8 @@ 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)
+ msg->target_vcpu = hv_context.vp_index[smp_processor_id()];
/*
* Add to list before we send the request since we may
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -875,7 +875,7 @@ struct vmbus_channel_relid_released {
struct vmbus_channel_initiate_contact {
struct vmbus_channel_message_header header;
u32 vmbus_version_requested;
- u32 padding2;
+ u32 target_vcpu; /* The VCPU the host should respond to */
u64 interrupt_page;
u64 monitor_page1;
u64 monitor_page2;
Patches currently in stable-queue which might be from kys@xxxxxxxxxxxxx are
queue-3.13/drivers-hv-vmbus-don-t-timeout-during-the-initial-connection-with-host.patch
queue-3.13/drivers-hv-vmbus-specify-the-target-cpu-that-should-receive-notification.patch
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