linux-kernel - [PATCH 27/28] Drivers: hv: Capture the host build information

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Date:	Sat,  1 Dec 2012 06:46:58 -0800
From:	"K. Y. Srinivasan" <kys@...rosoft.com>
To:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
	jasowang@...hat.com
Cc:	"K. Y. Srinivasan" <kys@...rosoft.com>
Subject: [PATCH 27/28] Drivers: hv: Capture the host build information

Capture the host build information so it can be presented along with the
negotiated vmbus version information.

Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
---
 drivers/hv/hv.c           |    9 +++++++++
 drivers/hv/hyperv_vmbus.h |    7 +++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 03e6a1e..0cd2da3 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -40,6 +40,11 @@ struct hv_context hv_context = {
 /*
  * query_hypervisor_info - Get version info of the windows hypervisor
  */
+unsigned int host_info_eax;
+unsigned int host_info_ebx;
+unsigned int host_info_ecx;
+unsigned int host_info_edx;
+
 static int query_hypervisor_info(void)
 {
 	unsigned int eax;
@@ -76,6 +81,10 @@ static int query_hypervisor_info(void)
 			    ecx,
 			    edx >> 24,
 			    edx & 0xFFFFFF);
+		host_info_eax = eax;
+		host_info_ebx = ebx;
+		host_info_ecx = ecx;
+		host_info_edx = edx;
 	}
 	return max_leaf;
 }
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index ac111f2..12f2f9e 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -531,6 +531,13 @@ extern void hv_synic_init(void *irqarg);
 
 extern void hv_synic_cleanup(void *arg);
 
+/*
+ * Host version information.
+ */
+extern unsigned int host_info_eax;
+extern unsigned int host_info_ebx;
+extern unsigned int host_info_ecx;
+extern unsigned int host_info_edx;
 
 /* Interface */
 
-- 
1.7.4.1

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