From 25c7bfaef201ab8cef400ea96e27803e1d32697a Mon Sep 17 00:00:00 2001 From: Isaku Yamahata Date: Fri, 17 Oct 2008 11:17:50 +0900 Subject: [PATCH] ia64/xen: add a necessary header file to compile include/xen/interface/xen.h Create include/asm-ia64/pvclock-abi.h to compile which contains the same definitions of include/asm-x86/pvclock-abi.h because ia64/xen uses same structure. Hopefully include/asm-x86/pvclock-abi.h would be moved to somewhere more generic. Another approach is to include include/asm-x86/pvclock-abi.h from include/asm-ia64/pvclock-abi.h. But this would break if/when x86 header files are moved under arch/x86. So for now, same definitions are duplicated as suggested by Tony. Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck --- arch/ia64/include/asm/pvclock-abi.h | 48 +++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 arch/ia64/include/asm/pvclock-abi.h diff --git a/arch/ia64/include/asm/pvclock-abi.h b/arch/ia64/include/asm/pvclock-abi.h new file mode 100644 index 000000000000..44ef9ef8f5b3 --- /dev/null +++ b/arch/ia64/include/asm/pvclock-abi.h @@ -0,0 +1,48 @@ +/* + * same structure to x86's + * Hopefully asm-x86/pvclock-abi.h would be moved to somewhere more generic. + * For now, define same duplicated definitions. + */ + +#ifndef _ASM_IA64__PVCLOCK_ABI_H +#define _ASM_IA64__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 pad[3]; +} __attribute__((__packed__)); /* 32 bytes */ + +struct pvclock_wall_clock { + u32 version; + u32 sec; + u32 nsec; +} __attribute__((__packed__)); + +#endif /* __ASSEMBLY__ */ +#endif /* _ASM_IA64__PVCLOCK_ABI_H */