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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-26 13:13:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-26 13:13:25 -0700
commit0a2fe19ccc4bc552a8083a595a3aa737b8bea727 (patch)
tree3bed37182f95fa3ac1673530457e994a89bd7e26 /arch/x86/mm
parentc1b669b72a05aeae0882742dd40f30d51732ed15 (diff)
parent9ca8f72a9297f2052d806bd1111e176533aa69bd (diff)
Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pul x86/efi changes from Ingo Molnar: "This tree adds an EFI bootloader handover protocol, which, once supported on the bootloader side, will make bootup faster and might result in simpler bootloaders. The other change activates the EFI wall clock time accessors on x86-64 as well, instead of the legacy RTC readout." * 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, efi: Handover Protocol x86-64/efi: Use EFI to deal with platform wall clock
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/pageattr.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index a718e0d2350..931930a9616 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -919,11 +919,13 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages,
/*
* On success we use clflush, when the CPU supports it to
- * avoid the wbindv. If the CPU does not support it and in the
- * error case we fall back to cpa_flush_all (which uses
- * wbindv):
+ * avoid the wbindv. If the CPU does not support it, in the
+ * error case, and during early boot (for EFI) we fall back
+ * to cpa_flush_all (which uses wbinvd):
*/
- if (!ret && cpu_has_clflush) {
+ if (early_boot_irqs_disabled)
+ __cpa_flush_all((void *)(long)cache);
+ else if (!ret && cpu_has_clflush) {
if (cpa.flags & (CPA_PAGES_ARRAY | CPA_ARRAY)) {
cpa_flush_array(addr, numpages, cache,
cpa.flags, pages);