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authorMarcelo Tosatti <mtosatti@redhat.com>2012-11-28 05:28:55 +0400
committerMarcelo Tosatti <mtosatti@redhat.com>2012-11-28 05:29:09 +0400
commit71056ae22d43f58d7e0f793af18ace2eaf5b74eb (patch)
tree02433f7fac25fbbb18405a0fe7a2b5f9925d3610 /arch/x86/include/asm/pvclock.h
parent582b336ec2c0f0076f5650a029fcc9abd4a906f7 (diff)
downloadlinux-71056ae22d43f58d7e0f793af18ace2eaf5b74eb.tar.xz
x86: pvclock: generic pvclock vsyscall initialization
Originally from Jeremy Fitzhardinge. Introduce generic, non hypervisor specific, pvclock initialization routines. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/pvclock.h')
-rw-r--r--arch/x86/include/asm/pvclock.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h
index 63f91679af73..109a9dd5d454 100644
--- a/arch/x86/include/asm/pvclock.h
+++ b/arch/x86/include/asm/pvclock.h
@@ -91,4 +91,16 @@ unsigned __pvclock_read_cycles(const struct pvclock_vcpu_time_info *src,
return version;
}
+struct pvclock_vsyscall_time_info {
+ struct pvclock_vcpu_time_info pvti;
+ u32 migrate_count;
+} __attribute__((__aligned__(SMP_CACHE_BYTES)));
+
+#define PVTI_SIZE sizeof(struct pvclock_vsyscall_time_info)
+#define PVCLOCK_VSYSCALL_NR_PAGES (((NR_CPUS-1)/(PAGE_SIZE/PVTI_SIZE))+1)
+
+int __init pvclock_init_vsyscall(struct pvclock_vsyscall_time_info *i,
+ int size);
+struct pvclock_vcpu_time_info *pvclock_get_vsyscall_time_info(int cpu);
+
#endif /* _ASM_X86_PVCLOCK_H */