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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 /arch/x86/Kconfig
parenta9b21b622958afc3f3bc5a23d266dd9ed1171fd3 (diff)
downloadlwn-7af192c954017499ec163bc9dbaaee2e593d7ef2.tar.gz
lwn-7af192c954017499ec163bc9dbaaee2e593d7ef2.zip
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 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 52e18e6d2ba0..f94bca6ff47f 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -410,6 +410,10 @@ config PARAVIRT
over full virtualization. However, when run without a hypervisor
the kernel is theoretically slower and slightly larger.
+config PARAVIRT_CLOCK
+ bool
+ default n
+
endif
config MEMTEST_BOOTPARAM