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| author | Jan Beulich <JBeulich@suse.com> | 2012-05-25 16:20:31 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-06 11:48:05 +0200 |
| commit | bacef661acdb634170a8faddbc1cf28e8f8b9eee (patch) | |
| tree | 76479c7d6f7b6aed38000ec60e5d739e2359a7f9 /init/main.c | |
| parent | eea5b5510fc5545d15b69da8e485a7424ae388cf (diff) | |
| download | lwn-bacef661acdb634170a8faddbc1cf28e8f8b9eee.tar.gz lwn-bacef661acdb634170a8faddbc1cf28e8f8b9eee.zip | |
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/main.c')
| -rw-r--r-- | init/main.c | 8 |
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); |