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authorShuo Liu <shuo.a.liu@intel.com>2021-02-07 06:10:36 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-02-09 12:58:19 +0300
commit5a0c9f176f232513d4114a518cbff835d232f500 (patch)
tree74f69dd80a5e040a3e1e9202c279f97c29fcc932 /drivers/virt
parent3d679d5aec648f50e645702929890b9611998a0b (diff)
downloadlinux-5a0c9f176f232513d4114a518cbff835d232f500.tar.xz
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>
Diffstat (limited to 'drivers/virt')
-rw-r--r--drivers/virt/acrn/acrn_drv.h4
-rw-r--r--drivers/virt/acrn/ioreq.c60
2 files changed, 64 insertions, 0 deletions
diff --git a/drivers/virt/acrn/acrn_drv.h b/drivers/virt/acrn/acrn_drv.h
index 068f0be769f6..8a7d7721f505 100644
--- a/drivers/virt/acrn/acrn_drv.h
+++ b/drivers/virt/acrn/acrn_drv.h
@@ -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);
diff --git a/drivers/virt/acrn/ioreq.c b/drivers/virt/acrn/ioreq.c
index d19c05582d38..80b2e3f0e276 100644
--- a/drivers/virt/acrn/ioreq.c
+++ b/drivers/virt/acrn/ioreq.c
@@ -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.