mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.5 KiB
48 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef _ASM_X86_PVCLOCK_ABI_H |
|
#define _ASM_X86_PVCLOCK_ABI_H |
|
#ifndef __ASSEMBLY__ |
|
|
|
/* |
|
* These structs MUST NOT be changed. |
|
* They are the ABI between hypervisor and guest OS. |
|
* Both Xen and KVM are using this. |
|
* |
|
* pvclock_vcpu_time_info holds the system time and the tsc timestamp |
|
* of the last update. So the guest can use the tsc delta to get a |
|
* more precise system time. There is one per virtual cpu. |
|
* |
|
* pvclock_wall_clock references the point in time when the system |
|
* time was zero (usually boot time), thus the guest calculates the |
|
* current wall clock by adding the system time. |
|
* |
|
* Protocol for the "version" fields is: hypervisor raises it (making |
|
* it uneven) before it starts updating the fields and raises it again |
|
* (making it even) when it is done. Thus the guest can make sure the |
|
* time values it got are consistent by checking the version before |
|
* and after reading them. |
|
*/ |
|
|
|
struct pvclock_vcpu_time_info { |
|
u32 version; |
|
u32 pad0; |
|
u64 tsc_timestamp; |
|
u64 system_time; |
|
u32 tsc_to_system_mul; |
|
s8 tsc_shift; |
|
u8 flags; |
|
u8 pad[2]; |
|
} __attribute__((__packed__)); /* 32 bytes */ |
|
|
|
struct pvclock_wall_clock { |
|
u32 version; |
|
u32 sec; |
|
u32 nsec; |
|
} __attribute__((__packed__)); |
|
|
|
#define PVCLOCK_TSC_STABLE_BIT (1 << 0) |
|
#define PVCLOCK_GUEST_STOPPED (1 << 1) |
|
/* PVCLOCK_COUNTS_FROM_ZERO broke ABI and can't be used anymore. */ |
|
#define PVCLOCK_COUNTS_FROM_ZERO (1 << 2) |
|
#endif /* __ASSEMBLY__ */ |
|
#endif /* _ASM_X86_PVCLOCK_ABI_H */
|
|
|