* + mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions.patch added to -mm tree
@ 2021-03-17 23:03 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2021-03-17 23:03 UTC (permalink / raw
To: bp, catalin.marinas, dingtianhong, hch, hpa, linmiaohe, linux,
mingo, mm-commits, mpe, npiggin, tglx, urezki, will
The patch titled
Subject: mm/vmalloc: provide fallback arch huge vmap support functions
has been added to the -mm tree. Its filename is
mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Nicholas Piggin <npiggin@gmail.com>
Subject: mm/vmalloc: provide fallback arch huge vmap support functions
If an architecture doesn't support a particular page table level as a huge
vmap page size then allow it to skip defining the support query function.
Link: https://lkml.kernel.org/r/20210317062402.533919-11-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ding Tianhong <dingtianhong@huawei.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm64/include/asm/vmalloc.h | 7 +++----
arch/powerpc/include/asm/vmalloc.h | 7 +++----
arch/x86/include/asm/vmalloc.h | 13 +++++--------
include/linux/vmalloc.h | 24 ++++++++++++++++++++----
4 files changed, 31 insertions(+), 20 deletions(-)
--- a/arch/arm64/include/asm/vmalloc.h~mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions
+++ a/arch/arm64/include/asm/vmalloc.h
@@ -4,11 +4,8 @@
#include <asm/page.h>
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-static inline bool arch_vmap_p4d_supported(pgprot_t prot)
-{
- return false;
-}
+#define arch_vmap_pud_supported arch_vmap_pud_supported
static inline bool arch_vmap_pud_supported(pgprot_t prot)
{
/*
@@ -19,11 +16,13 @@ static inline bool arch_vmap_pud_support
!IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
}
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
static inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
/* See arch_vmap_pud_supported() */
return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
}
+
#endif
#endif /* _ASM_ARM64_VMALLOC_H */
--- a/arch/powerpc/include/asm/vmalloc.h~mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions
+++ a/arch/powerpc/include/asm/vmalloc.h
@@ -5,21 +5,20 @@
#include <asm/page.h>
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-static inline bool arch_vmap_p4d_supported(pgprot_t prot)
-{
- return false;
-}
+#define arch_vmap_pud_supported arch_vmap_pud_supported
static inline bool arch_vmap_pud_supported(pgprot_t prot)
{
/* HPT does not cope with large pages in the vmalloc area */
return radix_enabled();
}
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
static inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
return radix_enabled();
}
+
#endif
#endif /* _ASM_POWERPC_VMALLOC_H */
--- a/arch/x86/include/asm/vmalloc.h~mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions
+++ a/arch/x86/include/asm/vmalloc.h
@@ -6,24 +6,21 @@
#include <asm/pgtable_areas.h>
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-static inline bool arch_vmap_p4d_supported(pgprot_t prot)
-{
- return false;
-}
+#ifdef CONFIG_X86_64
+#define arch_vmap_pud_supported arch_vmap_pud_supported
static inline bool arch_vmap_pud_supported(pgprot_t prot)
{
-#ifdef CONFIG_X86_64
return boot_cpu_has(X86_FEATURE_GBPAGES);
-#else
- return false;
-#endif
}
+#endif
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
static inline bool arch_vmap_pmd_supported(pgprot_t prot)
{
return boot_cpu_has(X86_FEATURE_PSE);
}
+
#endif
#endif /* _ASM_X86_VMALLOC_H */
--- a/include/linux/vmalloc.h~mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions
+++ a/include/linux/vmalloc.h
@@ -78,10 +78,26 @@ struct vmap_area {
};
};
-#ifndef CONFIG_HAVE_ARCH_HUGE_VMAP
-static inline bool arch_vmap_p4d_supported(pgprot_t prot) { return false; }
-static inline bool arch_vmap_pud_supported(pgprot_t prot) { return false; }
-static inline bool arch_vmap_pmd_supported(pgprot_t prot) { return false; }
+/* archs that select HAVE_ARCH_HUGE_VMAP should override one or more of these */
+#ifndef arch_vmap_p4d_supported
+static inline bool arch_vmap_p4d_supported(pgprot_t prot)
+{
+ return false;
+}
+#endif
+
+#ifndef arch_vmap_pud_supported
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+ return false;
+}
+#endif
+
+#ifndef arch_vmap_pmd_supported
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+ return false;
+}
#endif
/*
_
Patches currently in -mm which might be from npiggin@gmail.com are
arm-mm-add-missing-pud_page-define-to-2-level-page-tables.patch
mm-vmalloc-fix-huge_vmap-regression-by-enabling-huge-pages-in-vmalloc_to_page.patch
mm-apply_to_pte_range-warn-and-fail-if-a-large-pte-is-encountered.patch
mm-vmalloc-rename-vmap__range-vmap_pages__range.patch
mm-ioremap-rename-ioremap__range-to-vmap__range.patch
mm-huge_vmap-arch-support-cleanup.patch
powerpc-inline-huge-vmap-supported-functions.patch
arm64-inline-huge-vmap-supported-functions.patch
x86-inline-huge-vmap-supported-functions.patch
mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions.patch
mm-move-vmap_range-from-mm-ioremapc-to-mm-vmallocc.patch
mm-vmalloc-add-vmap_range_noflush-variant.patch
mm-vmalloc-hugepage-vmalloc-mappings.patch
powerpc-64s-radix-enable-huge-vmalloc-mappings.patch
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2021-03-17 23:03 + mm-vmalloc-provide-fallback-arch-huge-vmap-support-functions.patch added to -mm tree akpm
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