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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: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210207031040.49576-15-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shuo Liu 2021-02-07 11:10:36 +08:00 committed by Greg Kroah-Hartman
parent 3d679d5aec
commit 5a0c9f176f
2 changed files with 64 additions and 0 deletions
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4
drivers/virt/acrn/acrn_drv.h
View File

@ -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);

60
drivers/virt/acrn/ioreq.c
View File

@ -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.