[dpdk-dev] [PATCH v2 7/7] hv: add kernel patch

[Stephen Hemminger <stephen@networkplumber.org>]

From: Stephen Hemminger <stephen@networkplumber.org>

For users using non latest kernels, put kernel patch in for
them to use.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 .../linuxapp/hv_uio/vmbus-get-pages.patch          | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch

diff --git a/lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch b/lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch
new file mode 100644
index 0000000..e1a4b13
--- /dev/null
+++ b/lib/librte_eal/linuxapp/hv_uio/vmbus-get-pages.patch
@@ -0,0 +1,53 @@
+hyper-v: allow access to vmbus from userspace driver
+
+This is patch from  to allow access to hyper-v vmbus from UIO driver.
+
+Signed-off-by: Stas Egorov <segorov@mirantis.com>
+Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
+
+---
+v2 - simplify and rename to vmbus_get_monitor_pages
+
+ drivers/hv/connection.c |   20 +++++++++++++++++---
+ include/linux/hyperv.h  |    3 +++
+ 2 files changed, 20 insertions(+), 3 deletions(-)
+
+--- a/drivers/hv/connection.c
++++ b/drivers/hv/connection.c
+@@ -64,6 +64,15 @@
+ 	}
+ }
+ 
++void vmbus_get_monitor_pages(unsigned long *int_page,
++			     unsigned long monitor_pages[2])
++{
++	*int_page = (unsigned long)vmbus_connection.int_page;
++	monitor_pages[0] = (unsigned long)vmbus_connection.monitor_pages[0];
++	monitor_pages[1] = (unsigned long)vmbus_connection.monitor_pages[1];
++}
++EXPORT_SYMBOL_GPL(vmbus_get_monitor_pages);
++
+ static int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo,
+ 					__u32 version)
+ {
+@@ -327,8 +336,6 @@
+ 			else
+ 				bytes_to_read = 0;
+ 		} while (read_state && (bytes_to_read != 0));
+-	} else {
+-		pr_err("no channel callback for relid - %u\n", relid);
+ 	}
+ 
+ 	spin_unlock_irqrestore(&channel->inbound_lock, flags);
+--- a/include/linux/hyperv.h
++++ b/include/linux/hyperv.h
+@@ -1162,6 +1162,9 @@
+ 
+ extern void vmbus_ontimer(unsigned long data);
+ 
++extern void vmbus_get_monitor_pages(unsigned long *int_page,
++				    unsigned long monitor_pages[2]);
++
+ /* Base driver object */
+ struct hv_driver {
+ 	const char *name;
-- 
2.1.4