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authorJan Beulich <JBeulich@suse.com>2012-05-25 16:20:31 +0100
committerIngo Molnar <mingo@kernel.org>2012-06-06 11:48:05 +0200
commitbacef661acdb634170a8faddbc1cf28e8f8b9eee (patch)
tree76479c7d6f7b6aed38000ec60e5d739e2359a7f9 /init
parenteea5b5510fc5545d15b69da8e485a7424ae388cf (diff)
downloadlinux-linaro-stable-bacef661acdb634170a8faddbc1cf28e8f8b9eee.tar.gz
x86-64/efi: Use EFI to deal with platform wall clock
Other than ix86, x86-64 on EFI so far didn't set the {g,s}et_wallclock accessors to the EFI routines, thus incorrectly using raw RTC accesses instead. Simply removing the #ifdef around the respective code isn't enough, however: While so far early get-time calls were done in physical mode, this doesn't work properly for x86-64, as virtual addresses would still need to be set up for all runtime regions (which wasn't the case on the system I have access to), so instead the patch moves the call to efi_enter_virtual_mode() ahead (which in turn allows to drop all code related to calling efi-get-time in physical mode). Additionally the earlier calling of efi_set_executable() requires the CPA code to cope, i.e. during early boot it must be avoided to call cpa_flush_array(), as the first thing this function does is a BUG_ON(irqs_disabled()). Also make the two EFI functions in question here static - they're not being referenced elsewhere. Signed-off-by: Jan Beulich <jbeulich@suse.com> Tested-by: Matt Fleming <matt.fleming@intel.com> Acked-by: Matthew Garrett <mjg@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/4FBFBF5F020000780008637F@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/init/main.c b/init/main.c
index 1ca6b32c4828..eef30128321a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -460,6 +460,10 @@ static void __init mm_init(void)
percpu_init_late();
pgtable_cache_init();
vmalloc_init();
+#ifdef CONFIG_X86
+ if (efi_enabled)
+ efi_enter_virtual_mode();
+#endif
}
asmlinkage void __init start_kernel(void)
@@ -601,10 +605,6 @@ asmlinkage void __init start_kernel(void)
calibrate_delay();
pidmap_init();
anon_vma_init();
-#ifdef CONFIG_X86
- if (efi_enabled)
- efi_enter_virtual_mode();
-#endif
thread_info_cache_init();
cred_init();
fork_init(totalram_pages);