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authorDavid Vrabel <david.vrabel@citrix.com>2013-05-13 18:56:06 +0100
committerJohn Stultz <john.stultz@linaro.org>2013-05-28 14:00:59 -0700
commit3565184ed0c1ea46bea5b792da5f72a83c43e49b (patch)
tree4846a589a6aa295634ef585e5637872f15c19993 /include/linux/efi.h
parent0a0a7e66fa269de78975ea8d4e825a66d92b8d70 (diff)
x86: Increase precision of x86_platform.get/set_wallclock()
All the virtualized platforms (KVM, lguest and Xen) have persistent wallclocks that have more than one second of precision. read_persistent_wallclock() and update_persistent_wallclock() allow for nanosecond precision but their implementation on x86 with x86_platform.get/set_wallclock() only allows for one second precision. This means guests may see a wallclock time that is off by up to 1 second. Make set_wallclock() and get_wallclock() take a struct timespec parameter (which allows for nanosecond precision) so KVM and Xen guests may start with a more accurate wallclock time and a Xen dom0 can maintain a more accurate wallclock for guests. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'include/linux/efi.h')
-rw-r--r--include/linux/efi.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 2bc0ad78d058..0068bba6f8b6 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -594,8 +594,8 @@ extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
extern int __init efi_uart_console_only (void);
extern void efi_initialize_iomem_resources(struct resource *code_resource,
struct resource *data_resource, struct resource *bss_resource);
-extern unsigned long efi_get_time(void);
-extern int efi_set_rtc_mmss(unsigned long nowtime);
+extern void efi_get_time(struct timespec *now);
+extern int efi_set_rtc_mmss(const struct timespec *now);
extern void efi_reserve_boot_services(void);
extern struct efi_memory_map memmap;