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xen/sysfs: Use XENVER_guest_handle to query UUID

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This hypercall has been present since Xen 3.1, and is the preferred
method for a domain to obtain its UUID. Fall back to the xenstore method
if using an older version of Xen (which returns -ENOSYS).

Signed-off-by: Daniel De Graaf <[email protected]>
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
This commit is contained in:
Daniel De Graaf 2012-08-16 16:40:26 -04:00 • committed by Konrad Rzeszutek Wilk
commit 5c13f80677
2 changed files with 15 additions and 1 deletions
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3
include/xen/interface/version.h
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@ -60,4 +60,7 @@ struct xen_feature_info {
/* arg == NULL; returns host memory page size. */
#define XENVER_pagesize 7
/* arg == xen_domain_handle_t. */
#define XENVER_guest_handle 8
#endif /* __XEN_PUBLIC_VERSION_H__ */