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@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 16 insertions, 0 deletions

diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 03e6a1eb1145..0cd2da3b22f5 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 ac111f223821..12f2f9e989f7 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 */