diff options
Diffstat (limited to 'include/uapi/linux/vmclock-abi.h')
| -rw-r--r-- | include/uapi/linux/vmclock-abi.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/uapi/linux/vmclock-abi.h b/include/uapi/linux/vmclock-abi.h index 2d99b29ac44a..d320623b0118 100644 --- a/include/uapi/linux/vmclock-abi.h +++ b/include/uapi/linux/vmclock-abi.h @@ -115,6 +115,17 @@ struct vmclock_abi { * bit again after the update, using the about-to-be-valid fields. */ #define VMCLOCK_FLAG_TIME_MONOTONIC (1 << 7) + /* + * If the VM_GEN_COUNTER_PRESENT flag is set, the hypervisor will + * bump the vm_generation_counter field every time the guest is + * loaded from some save state (restored from a snapshot). + */ +#define VMCLOCK_FLAG_VM_GEN_COUNTER_PRESENT (1 << 8) + /* + * If the NOTIFICATION_PRESENT flag is set, the hypervisor will send + * a notification every time it updates seq_count to a new even number. + */ +#define VMCLOCK_FLAG_NOTIFICATION_PRESENT (1 << 9) __u8 pad[2]; __u8 clock_status; @@ -177,6 +188,15 @@ struct vmclock_abi { __le64 time_frac_sec; /* Units of 1/2^64 of a second */ __le64 time_esterror_nanosec; __le64 time_maxerror_nanosec; + + /* + * This field changes to another non-repeating value when the guest + * has been loaded from a snapshot. In addition to handling a + * disruption in time (which will also be signalled through the + * disruption_marker field), a guest may wish to discard UUIDs, + * reset network connections, reseed entropy, etc. + */ + __le64 vm_generation_counter; }; #endif /* __VMCLOCK_ABI_H__ */ |