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virt: acrn: Mark the uuid field as unused 

After the commits for userspace (see Link tags below) the uuid field
is not being used in the ACRN code. Update kernel to reflect these
changes, i.e. do the following:
- adding a comment explaining that it's not used anymore
- replacing the specific type by a raw buffer
- updating the example code accordingly

The advertised field confused users and actually never been used.
So the wrong part here is that kernel puts something which userspace
never used and hence this may confuse a reader of this code.

Note, that there is only a single tool that had been prepared a year
ago for these forthcoming changes in the kernel.

Link: https://github.com/projectacrn/acrn-hypervisor/commit/da0d24326ed6
Link: https://github.com/projectacrn/acrn-hypervisor/commit/bb0327e70097
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20221116162956.72658-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2022-11-16 18:29:56 +02:00 committed by Greg Kroah-Hartman
parent e68a558fb2
commit 1dbb4f0235
2 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/uapi/linux/acrn.h
View File

@ -12,7 +12,6 @@
#define _UAPI_ACRN_H
#include <linux/types.h>
#include <linux/uuid.h>
#define ACRN_IO_REQUEST_MAX 16
@ -186,7 +185,7 @@ struct acrn_ioreq_notify {
* @reserved0: Reserved and must be 0
* @vcpu_num: Number of vCPU in the VM. Return from hypervisor.
* @reserved1: Reserved and must be 0
* @uuid: UUID of the VM. Pass to hypervisor directly.
* @uuid: Empty space never to be used again (used to be UUID of the VM)
* @vm_flag: Flag of the VM creating. Pass to hypervisor directly.
* @ioreq_buf: Service VM GPA of I/O request buffer. Pass to
* hypervisor directly.
@ -198,7 +197,7 @@ struct acrn_vm_creation {
__u16 reserved0;
__u16 vcpu_num;
__u16 reserved1;
guid_t uuid;
__u8 uuid[16];
__u64 vm_flag;
__u64 ioreq_buf;
__u64 cpu_affinity;

3
samples/acrn/vm-sample.c
View File

@ -29,8 +29,6 @@ static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request
__u16 vcpu_num;
__u16 vmid;
/* POST_STANDARD_VM_UUID1, refer to https://github.com/projectacrn/acrn-hypervisor/blob/master/hypervisor/include/common/vm_uuids.h */
guid_t vm_uuid = GUID_INIT(0x385479d2, 0xd625, 0xe811, 0x86, 0x4e, 0xcb, 0x7a, 0x18, 0xb3, 0x46, 0x43);
int hsm_fd;
int is_running = 1;
@ -63,7 +61,6 @@ int main(int argc, char **argv)
}
hsm_fd = open("/dev/acrn_hsm", O_RDWR|O_CLOEXEC);
memcpy(&create_vm.uuid, &vm_uuid, 16);
create_vm.ioreq_buf = (__u64)io_req_buf;
ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_VM, &create_vm);
printf("Created VM! [%d]\n", ret);