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Commit 29423b7e authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
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Drivers: hv: Extend/modify vmbus_channel_offer_channel for win7 and beyond 



The "offfer" message sent by the host has been extended in win7 (ws2008 R2).
Add/modify state to reflect this extension. All these changes are backward
compatible.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2416603e

include/linux/hyperv.h

+31 −5
Original line number Diff line number Diff line
@@ -440,9 +440,13 @@ hv_get_ringbuffer_availbytes(struct hv_ring_buffer_info *rbi, 
struct vmbus_channel_offer {

	uuid_le if_type;

	uuid_le if_instance;

	u64 int_latency; /* in 100ns units */

	u32 if_revision;

	u32 server_ctx_size;	/* in bytes */



	/*

	 * These two fields are not currently used.

	 */

	u64 reserved1;

	u64 reserved2;



	u16 chn_flags;

	u16 mmio_megabytes;		/* in bytes * 1024 * 1024 */
@@ -464,7 +468,11 @@ struct vmbus_channel_offer { 
			unsigned char user_def[MAX_PIPE_USER_DEFINED_BYTES];

		} pipe;

	} u;

	u32 padding;

	/*

	 * The sub_channel_index is defined in win8.

	 */

	u16 sub_channel_index;

	u16 reserved3;

} __packed;



/* Server Flags */
@@ -660,7 +668,25 @@ struct vmbus_channel_offer_channel { 
	struct vmbus_channel_offer offer;

	u32 child_relid;

	u8 monitorid;

	u8 monitor_allocated;

	/*

	 * win7 and beyond splits this field into a bit field.

	 */

	u8 monitor_allocated:1;

	u8 reserved:7;

	/*

	 * These are new fields added in win7 and later.

	 * Do not access these fields without checking the

	 * negotiated protocol.

	 *

	 * If "is_dedicated_interrupt" is set, we must not set the

	 * associated bit in the channel bitmap while sending the

	 * interrupt to the host.

	 *

	 * connection_id is to be used in signaling the host.

	 */

	u16 is_dedicated_interrupt:1;

	u16 reserved1:15;

	u32 connection_id;

} __packed;



/* Rescind Offer parameters */