[v11,03/26] powerpc/mm: set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT

Message ID 1526555193-7242-4-git-send-email-ldufour@linux.vnet.ibm.com
State New
Headers show
Series
  • Speculative page faults
Related show

Commit Message

Laurent Dufour May 17, 2018, 11:06 a.m.
Set ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT for BOOK3S_64. This enables
the Speculative Page Fault handler.

Support is only provide for BOOK3S_64 currently because:
- require CONFIG_PPC_STD_MMU because checks done in
  set_access_flags_filter()
- require BOOK3S because we can't support for book3e_hugetlb_preload()
  called by update_mmu_cache()

Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
---
 arch/powerpc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index be7aca467692..75f71b963630 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -232,6 +232,7 @@  config PPC
 	select OLD_SIGACTION			if PPC32
 	select OLD_SIGSUSPEND
 	select SPARSE_IRQ
+	select ARCH_SUPPORTS_SPECULATIVE_PAGE_FAULT if PPC_BOOK3S_64
 	select SYSCTL_EXCEPTION_TRACE
 	select VIRT_TO_BUS			if !PPC64
 	#