Commit 5a0c9f17 authored by Shuo Liu's avatar Shuo Liu Committed by Greg Kroah-Hartman
Browse files

virt: acrn: Introduce I/O ranges operation interfaces 



An I/O request of a User VM, which is constructed by hypervisor, is
distributed by the ACRN Hypervisor Service Module to an I/O client
corresponding to the address range of the I/O request.

I/O client maintains a list of address ranges. Introduce
acrn_ioreq_range_{add,del}() to manage these address ranges.

Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Yu Wang <yu1.wang@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarShuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210207031040.49576-15-shuo.a.liu@intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3d679d5a

drivers/virt/acrn/acrn_drv.h

+4 −0
Original line number Diff line number Diff line
@@ -197,6 +197,10 @@ struct acrn_ioreq_client *acrn_ioreq_client_create(struct acrn_vm *vm, 
						   void *data, bool is_default,

						   const char *name);

void acrn_ioreq_client_destroy(struct acrn_ioreq_client *client);

int acrn_ioreq_range_add(struct acrn_ioreq_client *client,

			 u32 type, u64 start, u64 end);

void acrn_ioreq_range_del(struct acrn_ioreq_client *client,

			  u32 type, u64 start, u64 end);



int acrn_msi_inject(struct acrn_vm *vm, u64 msi_addr, u64 msi_data);

drivers/virt/acrn/ioreq.c

+60 −0
Original line number Diff line number Diff line
@@ -103,6 +103,66 @@ int acrn_ioreq_request_default_complete(struct acrn_vm *vm, u16 vcpu) 
	return ret;

}



/**

 * acrn_ioreq_range_add() - Add an iorange monitored by an ioreq client

 * @client:	The ioreq client

 * @type:	Type (ACRN_IOREQ_TYPE_MMIO or ACRN_IOREQ_TYPE_PORTIO)

 * @start:	Start address of iorange

 * @end:	End address of iorange

 *

 * Return: 0 on success, <0 on error

 */

int acrn_ioreq_range_add(struct acrn_ioreq_client *client,

			 u32 type, u64 start, u64 end)

{

	struct acrn_ioreq_range *range;



	if (end < start) {

		dev_err(acrn_dev.this_device,

			"Invalid IO range [0x%llx,0x%llx]\n", start, end);

		return -EINVAL;

	}



	range = kzalloc(sizeof(*range), GFP_KERNEL);

	if (!range)

		return -ENOMEM;



	range->type = type;

	range->start = start;

	range->end = end;



	write_lock_bh(&client->range_lock);

	list_add(&range->list, &client->range_list);

	write_unlock_bh(&client->range_lock);



	return 0;

}



/**

 * acrn_ioreq_range_del() - Del an iorange monitored by an ioreq client

 * @client:	The ioreq client

 * @type:	Type (ACRN_IOREQ_TYPE_MMIO or ACRN_IOREQ_TYPE_PORTIO)

 * @start:	Start address of iorange

 * @end:	End address of iorange

 */

void acrn_ioreq_range_del(struct acrn_ioreq_client *client,

			  u32 type, u64 start, u64 end)

{

	struct acrn_ioreq_range *range;



	write_lock_bh(&client->range_lock);

	list_for_each_entry(range, &client->range_list, list) {

		if (type == range->type &&

		    start == range->start &&

		    end == range->end) {

			list_del(&range->list);

			kfree(range);

			break;

		}

	}

	write_unlock_bh(&client->range_lock);

}



/*

 * ioreq_task() is the execution entity of handler thread of an I/O client.

 * The handler callback of the I/O client is called within the handler thread.