summaryrefslogtreecommitdiffstats
path: root/include/asm-x86/pvclock.h
diff options
context:
space:
mode:
authorGerd Hoffmann <kraxel@redhat.com>2008-06-03 16:17:29 +0200
committerAvi Kivity <avi@qumranet.com>2008-06-24 21:02:31 +0300
commit7af192c954017499ec163bc9dbaaee2e593d7ef2 (patch)
tree04e28552d1e1e265443933e3e658949170997c0e /include/asm-x86/pvclock.h
parenta9b21b622958afc3f3bc5a23d266dd9ed1171fd3 (diff)
x86: Add structs and functions for paravirt clocksource
This patch adds structs for the paravirt clocksource ABI used by both xen and kvm (pvclock-abi.h). It also adds some helper functions to read system time and wall clock time from a paravirtual clocksource (pvclock.[ch]). They are based on the xen code. They are enabled using CONFIG_PARAVIRT_CLOCK. Subsequent patches of this series will put the code in use. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/asm-x86/pvclock.h')
-rw-r--r--include/asm-x86/pvclock.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-x86/pvclock.h b/include/asm-x86/pvclock.h
new file mode 100644
index 00000000000..85b1bba8e0a
--- /dev/null
+++ b/include/asm-x86/pvclock.h
@@ -0,0 +1,13 @@
+#ifndef _ASM_X86_PVCLOCK_H_
+#define _ASM_X86_PVCLOCK_H_
+
+#include <linux/clocksource.h>
+#include <asm/pvclock-abi.h>
+
+/* some helper functions for xen and kvm pv clock sources */
+cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src);
+void pvclock_read_wallclock(struct pvclock_wall_clock *wall,
+ struct pvclock_vcpu_time_info *vcpu,
+ struct timespec *ts);
+
+#endif /* _ASM_X86_PVCLOCK_H_ */