From: Nicholas Piggin <npiggin@gmail.com>
To: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org,
Jonathan Cameron <Jonathan.Cameron@Huawei.com>,
Christoph Hellwig <hch@infradead.org>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Ding Tianhong <dingtianhong@huawei.com>
Subject: [PATCH v11 09/13] mm/vmalloc: provide fallback arch huge vmap support functions
Date: Tue, 26 Jan 2021 14:45:06 +1000 [thread overview]
Message-ID: <20210126044510.2491820-10-npiggin@gmail.com> (raw)
In-Reply-To: <20210126044510.2491820-1-npiggin@gmail.com>
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.
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
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(-)
diff --git a/arch/arm64/include/asm/vmalloc.h b/arch/arm64/include/asm/vmalloc.h
index fc9a12d6cc1a..7a22aeea9bb5 100644
--- a/arch/arm64/include/asm/vmalloc.h
+++ b/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_supported(pgprot_t prot)
!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 */
diff --git a/arch/powerpc/include/asm/vmalloc.h b/arch/powerpc/include/asm/vmalloc.h
index 3f0c153befb0..4c69ece52a31 100644
--- a/arch/powerpc/include/asm/vmalloc.h
+++ b/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 */
diff --git a/arch/x86/include/asm/vmalloc.h b/arch/x86/include/asm/vmalloc.h
index e714b00fc0ca..49ce331f3ac6 100644
--- a/arch/x86/include/asm/vmalloc.h
+++ b/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 */
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 00bd62bd701e..9f7b8b00101b 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -83,10 +83,26 @@ 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
/*
--
2.23.0
next prev parent reply other threads:[~2021-01-26 23:17 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-26 4:44 [PATCH v11 00/13] huge vmalloc mappings Nicholas Piggin
2021-01-26 4:44 ` [PATCH v11 01/13] mm/vmalloc: fix HUGE_VMAP regression by enabling huge pages in vmalloc_to_page Nicholas Piggin
2021-01-26 6:40 ` Miaohe Lin
2021-01-28 3:13 ` Ding Tianhong
2021-02-02 10:22 ` Nicholas Piggin
2021-01-26 4:44 ` [PATCH v11 02/13] mm: apply_to_pte_range warn and fail if a large pte is encountered Nicholas Piggin
2021-01-26 6:49 ` Miaohe Lin
2021-01-26 4:45 ` [PATCH v11 03/13] mm/vmalloc: rename vmap_*_range vmap_pages_*_range Nicholas Piggin
2021-01-27 2:10 ` Miaohe Lin
2021-01-26 4:45 ` [PATCH v11 04/13] mm/ioremap: rename ioremap_*_range to vmap_*_range Nicholas Piggin
2021-01-26 6:40 ` Christoph Hellwig
2021-01-28 2:38 ` Miaohe Lin
2021-01-26 4:45 ` [PATCH v11 05/13] mm: HUGE_VMAP arch support cleanup Nicholas Piggin
2021-01-26 6:07 ` Ding Tianhong
2021-01-26 13:26 ` kernel test robot
2021-01-27 5:26 ` kernel test robot
2021-01-26 4:45 ` [PATCH v11 06/13] powerpc: inline huge vmap supported functions Nicholas Piggin
2021-01-26 4:45 ` [PATCH v11 07/13] arm64: " Nicholas Piggin
2021-01-26 4:45 ` [PATCH v11 08/13] x86: " Nicholas Piggin
2021-01-26 4:45 ` Nicholas Piggin [this message]
2021-01-26 4:45 ` [PATCH v11 10/13] mm: Move vmap_range from mm/ioremap.c to mm/vmalloc.c Nicholas Piggin
2021-01-26 4:45 ` [PATCH v11 11/13] mm/vmalloc: add vmap_range_noflush variant Nicholas Piggin
2021-01-26 4:45 ` [PATCH v11 12/13] mm/vmalloc: Hugepage vmalloc mappings Nicholas Piggin
2021-01-26 6:59 ` Ding Tianhong
2021-01-26 9:47 ` Nicholas Piggin
2021-01-26 11:48 ` Ding Tianhong
2021-01-26 4:45 ` [PATCH v11 13/13] powerpc/64s/radix: Enable huge " Nicholas Piggin
2021-01-27 10:26 ` Michael Ellerman
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