powerpc/mm: enable move pmd/pud

mremap HAVE_MOVE_PMD/PUD optimization time comparison for 1GB region:
1GB mremap - Source PTE-aligned, Destination PTE-aligned
  mremap time:      1127034ns
1GB mremap - Source PMD-aligned, Destination PMD-aligned
  mremap time:       508817ns
1GB mremap - Source PUD-aligned, Destination PUD-aligned
  mremap time:        23046ns

Link: https://lkml.kernel.org/r/20210422054323.150993-10-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index f998e655b5706c8511e02f15deda0d4f26dba06d..720d70e342617290d93caa4b9852e187b00adb2e 100644 (file)
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -96,6 +96,8 @@ config PPC_BOOK3S_64
        select PPC_FPU
        select PPC_HAVE_PMU_SUPPORT
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+       select HAVE_MOVE_PMD
+       select HAVE_MOVE_PUD
        select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
        select ARCH_ENABLE_PMD_SPLIT_PTLOCK
        select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE