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Drivers: hv: Support handling multiple VMBUS versions

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The current code hard coded the vmbus version independent of the host
it was running on. Add code to dynamically negotiate the most appropriate
version.

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>
This commit is contained in:
K. Y. Srinivasan
2012-12-01 06:46:38 -08:00
committed by Greg Kroah-Hartman
parent 4fa152ce24
commit 610071c384
2 changed files with 113 additions and 62 deletions
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6
include/linux/hyperv.h
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@@ -406,12 +406,6 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi,
#define HV_DRV_VERSION "3.1"
/*
* A revision number of vmbus that is used for ensuring both ends on a
* partition are using compatible versions.
*/
#define VMBUS_REVISION_NUMBER 13
/* Make maximum size of pipe payload of 16K */
#define MAX_PIPE_DATA_PAYLOAD (sizeof(u8) * 16384)