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authorAlexandre Ghiti <alex@ghiti.fr>2019-05-13 17:18:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-14 09:47:47 -0700
commita861bbce27634160ae0330126b4ef001d6941c8f (patch)
treee8932e025f5540e7b36f53b812f5031eae805797 /arch
parent0d7b4a607d8f0f95f1ce49e993a04317d10a4ecd (diff)
downloadlinux-a861bbce27634160ae0330126b4ef001d6941c8f.tar.bz2
sh: advertise gigantic page support
Patch series "Fix free/allocation of runtime gigantic pages", v8. This series fixes sh and sparc that did not advertise their gigantic page support and then were not able to allocate and free those pages at runtime. It renames MEMORY_ISOLATION && COMPACTION || CMA condition into the more accurate CONTIG_ALLOC, since it allows the definition of alloc_contig_range function. Finally, it then fixes the wrong definition of ARCH_HAS_GIGANTIC_PAGE config that, without MEMORY_ISOLATION && COMPACTION || CMA defined, did not allow architectures to free boottime allocated gigantic pages although unrelated. This patch (of 4): sh actually supports gigantic pages and selecting ARCH_HAS_GIGANTIC_PAGE allows it to allocate and free gigantic pages at runtime. At least sdk7786_defconfig exposes such a configuration with huge pages of 64MB, pages of 4KB and MAX_ORDER = 11: HPAGE_SHIFT (26) - PAGE_SHIFT (12) = 14 >= MAX_ORDER (11) Link: http://lkml.kernel.org/r/20190327063626.18421-2-alex@ghiti.fr Signed-off-by: Alexandre Ghiti <alex@ghiti.fr> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: David S. Miller <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Andy Lutomirsky <luto@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Kravetz <mike.kravetz@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 0be08d586d40..6349396317a9 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -53,6 +53,7 @@ config SUPERH
select HAVE_FUTEX_CMPXCHG if FUTEX
select HAVE_NMI
select NEED_SG_DMA_LENGTH
+ select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
help
The SuperH is a RISC processor targeted for use in embedded systems