From 2f0584f3f4bd60bcc8735172981fb0bff86e74e0 Mon Sep 17 00:00:00 2001
From: Rick Edgecombe <rick.p.edgecombe@intel.com>
Date: Mon, 12 Jun 2023 17:10:27 -0700
Subject: [PATCH] mm: Rename arch pte_mkwrite()'s to pte_mkwrite_novma()
The x86 Shadow stack feature includes a new type of memory called shadow
stack. This shadow stack memory has some unusual properties, which requires
some core mm changes to function properly.
One of these unusual properties is that shadow stack memory is writable,
but only in limited ways. These limits are applied via a specific PTE
bit combination. Nevertheless, the memory is writable, and core mm code
will need to apply the writable permissions in the typical paths that
call pte_mkwrite(). The goal is to make pte_mkwrite() take a VMA, so
that the x86 implementation of it can know whether to create regular
writable or shadow stack mappings.
But there are a couple of challenges to this. Modifying the signatures of
each arch pte_mkwrite() implementation would be error prone because some
are generated with macros and would need to be re-implemented. Also, some
pte_mkwrite() callers operate on kernel memory without a VMA.
So this can be done in a three step process. First pte_mkwrite() can be
renamed to pte_mkwrite_novma() in each arch, with a generic pte_mkwrite()
added that just calls pte_mkwrite_novma(). Next callers without a VMA can
be moved to pte_mkwrite_novma(). And lastly, pte_mkwrite() and all callers
can be changed to take/pass a VMA.
Start the process by renaming pte_mkwrite() to pte_mkwrite_novma() and
adding the pte_mkwrite() wrapper in linux/pgtable.h. Apply the same
pattern for pmd_mkwrite(). Since not all archs have a pmd_mkwrite_novma(),
create a new arch config HAS_HUGE_PAGE that can be used to tell if
pmd_mkwrite() should be defined. Otherwise in the !HAS_HUGE_PAGE cases the
compiler would not be able to find pmd_mkwrite_novma().
No functional change.
Suggested-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/lkml/CAHk-=wiZjSu7c9sFYZb3q04108stgHff2wfbokGCCgW7riz+8Q@mail.gmail.com/
Link: https://lore.kernel.org/all/20230613001108.3040476-2-rick.p.edgecombe%40intel.com
---
Documentation/mm/arch_pgtable_helpers.rst | 6 ++++++
arch/Kconfig | 8 ++++++++
arch/alpha/include/asm/pgtable.h | 2 +-
arch/arc/include/asm/hugepage.h | 2 +-
arch/arc/include/asm/pgtable-bits-arcv2.h | 2 +-
arch/arm/include/asm/pgtable-3level.h | 2 +-
arch/arm/include/asm/pgtable.h | 2 +-
arch/arm64/include/asm/pgtable.h | 4 ++--
arch/csky/include/asm/pgtable.h | 2 +-
arch/hexagon/include/asm/pgtable.h | 2 +-
arch/ia64/include/asm/pgtable.h | 2 +-
arch/loongarch/include/asm/pgtable.h | 4 ++--
arch/m68k/include/asm/mcf_pgtable.h | 2 +-
arch/m68k/include/asm/motorola_pgtable.h | 2 +-
arch/m68k/include/asm/sun3_pgtable.h | 2 +-
arch/microblaze/include/asm/pgtable.h | 2 +-
arch/mips/include/asm/pgtable.h | 6 +++---
arch/nios2/include/asm/pgtable.h | 2 +-
arch/openrisc/include/asm/pgtable.h | 2 +-
arch/parisc/include/asm/pgtable.h | 2 +-
arch/powerpc/include/asm/book3s/32/pgtable.h | 2 +-
arch/powerpc/include/asm/book3s/64/pgtable.h | 4 ++--
arch/powerpc/include/asm/nohash/32/pgtable.h | 4 ++--
arch/powerpc/include/asm/nohash/32/pte-8xx.h | 4 ++--
arch/powerpc/include/asm/nohash/64/pgtable.h | 2 +-
arch/riscv/include/asm/pgtable.h | 6 +++---
arch/s390/Kconfig | 1 +
arch/s390/include/asm/hugetlb.h | 2 +-
arch/s390/include/asm/pgtable.h | 4 ++--
arch/sh/include/asm/pgtable_32.h | 4 ++--
arch/sparc/include/asm/pgtable_32.h | 2 +-
arch/sparc/include/asm/pgtable_64.h | 6 +++---
arch/um/include/asm/pgtable.h | 2 +-
arch/x86/include/asm/pgtable.h | 4 ++--
arch/xtensa/include/asm/pgtable.h | 2 +-
include/asm-generic/hugetlb.h | 2 +-
include/linux/pgtable.h | 14 ++++++++++++++
37 files changed, 76 insertions(+), 47 deletions(-)
diff --git a/Documentation/mm/arch_pgtable_helpers.rst b/Documentation/mm/arch_pgtable_helpers.rst
index af3891f895b0b..69ce1f2aa4d19 100644
--- a/Documentation/mm/arch_pgtable_helpers.rst
+++ b/Documentation/mm/arch_pgtable_helpers.rst
@@ -48,6 +48,9 @@ PTE Page Table Helpers
+---------------------------+--------------------------------------------------+
| pte_mkwrite | Creates a writable PTE |
+---------------------------+--------------------------------------------------+
+| pte_mkwrite_novma | Creates a writable PTE, of the conventional type |
+| | of writable. |
++---------------------------+--------------------------------------------------+
| pte_wrprotect | Creates a write protected PTE |
+---------------------------+--------------------------------------------------+
| pte_mkspecial | Creates a special PTE |
@@ -120,6 +123,9 @@ PMD Page Table Helpers
+---------------------------+--------------------------------------------------+
| pmd_mkwrite | Creates a writable PMD |
+---------------------------+--------------------------------------------------+
+| pmd_mkwrite_novma | Creates a writable PMD, of the conventional type |
+| | of writable. |
++---------------------------+--------------------------------------------------+
| pmd_wrprotect | Creates a write protected PMD |
+---------------------------+--------------------------------------------------+
| pmd_mkspecial | Creates a special PMD |
diff --git a/arch/Kconfig b/arch/Kconfig
index aff2746c8af28..cde7983bae69a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -939,6 +939,14 @@ config HAVE_ARCH_HUGE_VMALLOC
config ARCH_WANT_HUGE_PMD_SHARE
bool
+# Archs that want to use pmd_mkwrite on kernel memory need it defined even
+# if there are no userspace memory management features that use it
+config ARCH_WANT_KERNEL_PMD_MKWRITE
+ bool
+
+config ARCH_WANT_PMD_MKWRITE
+ def_bool TRANSPARENT_HUGEPAGE || ARCH_WANT_KERNEL_PMD_MKWRITE
+
config HAVE_ARCH_SOFT_DIRTY
bool
diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h
index ba43cb841d19c..af1a13ab3320b 100644
--- a/arch/alpha/include/asm/pgtable.h
+++ b/arch/alpha/include/asm/pgtable.h
@@ -256,7 +256,7 @@ extern inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED;
extern inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) |= _PAGE_FOW; return pte; }
extern inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~(__DIRTY_BITS); return pte; }
extern inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~(__ACCESS_BITS); return pte; }
-extern inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) &= ~_PAGE_FOW; return pte; }
+extern inline pte_t pte_mkwrite_novma(pte_t pte){ pte_val(pte) &= ~_PAGE_FOW; return pte; }
extern inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= __DIRTY_BITS; return pte; }
extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; return pte; }
diff --git a/arch/arc/include/asm/hugepage.h b/arch/arc/include/asm/hugepage.h
index 5001b796fb8db..ef8d4166370c8 100644
--- a/arch/arc/include/asm/hugepage.h
+++ b/arch/arc/include/asm/hugepage.h
@@ -21,7 +21,7 @@ static inline pmd_t pte_pmd(pte_t pte)
}
#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
-#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
+#define pmd_mkwrite_novma(pmd) pte_pmd(pte_mkwrite_novma(pmd_pte(pmd)))
#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
diff --git a/arch/arc/include/asm/pgtable-bits-arcv2.h b/arch/arc/include/asm/pgtable-bits-arcv2.h
index 6e9f8ca6d6a16..5c073d9f41c26 100644
--- a/arch/arc/include/asm/pgtable-bits-arcv2.h
+++ b/arch/arc/include/asm/pgtable-bits-arcv2.h
@@ -87,7 +87,7 @@
PTE_BIT_FUNC(mknotpresent, &= ~(_PAGE_PRESENT));
PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
-PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
+PTE_BIT_FUNC(mkwrite_novma, |= (_PAGE_WRITE));
PTE_BIT_FUNC(mkclean, &= ~(_PAGE_DIRTY));
PTE_BIT_FUNC(mkdirty, |= (_PAGE_DIRTY));
PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 1060497915000..71c3add6417f9 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -202,7 +202,7 @@ static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; }
PMD_BIT_FUNC(wrprotect, |= L_PMD_SECT_RDONLY);
PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF);
-PMD_BIT_FUNC(mkwrite, &= ~L_PMD_SECT_RDONLY);
+PMD_BIT_FUNC(mkwrite_novma, &= ~L_PMD_SECT_RDONLY);
PMD_BIT_FUNC(mkdirty, |= L_PMD_SECT_DIRTY);
PMD_BIT_FUNC(mkclean, &= ~L_PMD_SECT_DIRTY);
PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF);
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 34662a9d4cabf..d88dd54858ba7 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -227,7 +227,7 @@ static inline pte_t pte_wrprotect(pte_t pte)
return set_pte_bit(pte, __pgprot(L_PTE_RDONLY));
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return clear_pte_bit(pte, __pgprot(L_PTE_RDONLY));
}
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 0bd18de9fd97b..7a3d62cb9beed 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -180,7 +180,7 @@ static inline pmd_t set_pmd_bit(pmd_t pmd, pgprot_t prot)
return pmd;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte = set_pte_bit(pte, __pgprot(PTE_WRITE));
pte = clear_pte_bit(pte, __pgprot(PTE_RDONLY));
@@ -487,7 +487,7 @@ static inline int pmd_trans_huge(pmd_t pmd)
#define pmd_cont(pmd) pte_cont(pmd_pte(pmd))
#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
-#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
+#define pmd_mkwrite_novma(pmd) pte_pmd(pte_mkwrite_novma(pmd_pte(pmd)))
#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
diff --git a/arch/csky/include/asm/pgtable.h b/arch/csky/include/asm/pgtable.h
index d4042495febc0..aa0cce4fc02f0 100644
--- a/arch/csky/include/asm/pgtable.h
+++ b/arch/csky/include/asm/pgtable.h
@@ -176,7 +176,7 @@ static inline pte_t pte_mkold(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= _PAGE_WRITE;
if (pte_val(pte) & _PAGE_MODIFIED)
diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h
index 59393613d0862..fc2d2d83368d2 100644
--- a/arch/hexagon/include/asm/pgtable.h
+++ b/arch/hexagon/include/asm/pgtable.h
@@ -300,7 +300,7 @@ static inline pte_t pte_wrprotect(pte_t pte)
}
/* pte_mkwrite - mark page as writable */
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= _PAGE_WRITE;
return pte;
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 21c97e31a28ae..f80aba7cad99e 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -268,7 +268,7 @@ ia64_phys_addr_valid (unsigned long addr)
* access rights:
*/
#define pte_wrprotect(pte) (__pte(pte_val(pte) & ~_PAGE_AR_RW))
-#define pte_mkwrite(pte) (__pte(pte_val(pte) | _PAGE_AR_RW))
+#define pte_mkwrite_novma(pte) (__pte(pte_val(pte) | _PAGE_AR_RW))
#define pte_mkold(pte) (__pte(pte_val(pte) & ~_PAGE_A))
#define pte_mkyoung(pte) (__pte(pte_val(pte) | _PAGE_A))
#define pte_mkclean(pte) (__pte(pte_val(pte) & ~_PAGE_D))
diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h
index 38afeb7dd58b6..e8e10d0c1e4d3 100644
--- a/arch/loongarch/include/asm/pgtable.h
+++ b/arch/loongarch/include/asm/pgtable.h
@@ -390,7 +390,7 @@ static inline pte_t pte_mkdirty(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= _PAGE_WRITE;
if (pte_val(pte) & _PAGE_MODIFIED)
@@ -490,7 +490,7 @@ static inline int pmd_write(pmd_t pmd)
return !!(pmd_val(pmd) & _PAGE_WRITE);
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
+static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
pmd_val(pmd) |= _PAGE_WRITE;
if (pmd_val(pmd) & _PAGE_MODIFIED)
diff --git a/arch/m68k/include/asm/mcf_pgtable.h b/arch/m68k/include/asm/mcf_pgtable.h
index 43e8da8465f9e..6cd022fd3d183 100644
--- a/arch/m68k/include/asm/mcf_pgtable.h
+++ b/arch/m68k/include/asm/mcf_pgtable.h
@@ -210,7 +210,7 @@ static inline pte_t pte_mkold(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= CF_PAGE_WRITABLE;
return pte;
diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h
index ec0dc19ab8343..ba28ca4d219a0 100644
--- a/arch/m68k/include/asm/motorola_pgtable.h
+++ b/arch/m68k/include/asm/motorola_pgtable.h
@@ -155,7 +155,7 @@ static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED;
static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) |= _PAGE_RONLY; return pte; }
static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) &= ~_PAGE_RONLY; return pte; }
+static inline pte_t pte_mkwrite_novma(pte_t pte){ pte_val(pte) &= ~_PAGE_RONLY; return pte; }
static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
static inline pte_t pte_mknocache(pte_t pte)
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h
index 9e7bf8a5f8f88..b60723b0c9933 100644
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -143,7 +143,7 @@ static inline int pte_young(pte_t pte) { return pte_val(pte) & SUN3_PAGE_ACCESS
static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_WRITEABLE; return pte; }
static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_MODIFIED; return pte; }
static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~SUN3_PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; }
+static inline pte_t pte_mkwrite_novma(pte_t pte){ pte_val(pte) |= SUN3_PAGE_WRITEABLE; return pte; }
static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= SUN3_PAGE_MODIFIED; return pte; }
static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= SUN3_PAGE_ACCESSED; return pte; }
static inline pte_t pte_mknocache(pte_t pte) { pte_val(pte) |= SUN3_PAGE_NOCACHE; return pte; }
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index d1b8272abcd9b..9108b33a78861 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -266,7 +266,7 @@ static inline pte_t pte_mkread(pte_t pte) \
{ pte_val(pte) |= _PAGE_USER; return pte; }
static inline pte_t pte_mkexec(pte_t pte) \
{ pte_val(pte) |= _PAGE_USER | _PAGE_EXEC; return pte; }
-static inline pte_t pte_mkwrite(pte_t pte) \
+static inline pte_t pte_mkwrite_novma(pte_t pte) \
{ pte_val(pte) |= _PAGE_RW; return pte; }
static inline pte_t pte_mkdirty(pte_t pte) \
{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 574fa14ac8b25..40a54fd6e48d4 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -309,7 +309,7 @@ static inline pte_t pte_mkold(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte.pte_low |= _PAGE_WRITE;
if (pte.pte_low & _PAGE_MODIFIED) {
@@ -364,7 +364,7 @@ static inline pte_t pte_mkold(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= _PAGE_WRITE;
if (pte_val(pte) & _PAGE_MODIFIED)
@@ -627,7 +627,7 @@ static inline pmd_t pmd_wrprotect(pmd_t pmd)
return pmd;
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
+static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
pmd_val(pmd) |= _PAGE_WRITE;
if (pmd_val(pmd) & _PAGE_MODIFIED)
diff --git a/arch/nios2/include/asm/pgtable.h b/arch/nios2/include/asm/pgtable.h
index 0f5c2564e9f59..cf1ffbc1a121d 100644
--- a/arch/nios2/include/asm/pgtable.h
+++ b/arch/nios2/include/asm/pgtable.h
@@ -129,7 +129,7 @@ static inline pte_t pte_mkold(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= _PAGE_WRITE;
return pte;
diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h
index 3eb9b9555d0df..828820c74fc5e 100644
--- a/arch/openrisc/include/asm/pgtable.h
+++ b/arch/openrisc/include/asm/pgtable.h
@@ -250,7 +250,7 @@ static inline pte_t pte_mkold(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte_val(pte) |= _PAGE_WRITE;
return pte;
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index 5656395c95eef..5f4dfe96980d6 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -331,7 +331,7 @@ static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; retu
static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_WRITE; return pte; }
static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; }
+static inline pte_t pte_mkwrite_novma(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; }
static inline pte_t pte_mkspecial(pte_t pte) { pte_val(pte) |= _PAGE_SPECIAL; return pte; }
/*
diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index 7bf1fe7297c63..67dfb674a4c15 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -498,7 +498,7 @@ static inline pte_t pte_mkpte(pte_t pte)
return pte;
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_RW);
}
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 4acc9690f5999..0328d917494a0 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -600,7 +600,7 @@ static inline pte_t pte_mkexec(pte_t pte)
return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_EXEC));
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
/*
* write implies read, hence set both
@@ -1071,7 +1071,7 @@ static inline pte_t *pmdp_ptep(pmd_t *pmd)
#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
-#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
+#define pmd_mkwrite_novma(pmd) pte_pmd(pte_mkwrite_novma(pmd_pte(pmd)))
#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
#define pmd_soft_dirty(pmd) pte_soft_dirty(pmd_pte(pmd))
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index fec56d965f00d..33213b31fcbb3 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -170,8 +170,8 @@ void unmap_kernel_page(unsigned long va);
#define pte_clear(mm, addr, ptep) \
do { pte_update(mm, addr, ptep, ~0, 0, 0); } while (0)
-#ifndef pte_mkwrite
-static inline pte_t pte_mkwrite(pte_t pte)
+#ifndef pte_mkwrite_novma
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_RW);
}
diff --git a/arch/powerpc/include/asm/nohash/32/pte-8xx.h b/arch/powerpc/include/asm/nohash/32/pte-8xx.h
index 1a89ebdc3acc9..21f681ee535a2 100644
--- a/arch/powerpc/include/asm/nohash/32/pte-8xx.h
+++ b/arch/powerpc/include/asm/nohash/32/pte-8xx.h
@@ -101,12 +101,12 @@ static inline int pte_write(pte_t pte)
#define pte_write pte_write
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_RO);
}
-#define pte_mkwrite pte_mkwrite
+#define pte_mkwrite_novma pte_mkwrite_novma
static inline bool pte_user(pte_t pte)
{
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h
index 287e25864ffae..abe4fd82721ec 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable.h
@@ -85,7 +85,7 @@
#ifndef __ASSEMBLY__
/* pte_clear moved to later in this file */
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_RW);
}
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 75970ee2bda22..d2b990152921c 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -378,7 +378,7 @@ static inline pte_t pte_wrprotect(pte_t pte)
/* static inline pte_t pte_mkread(pte_t pte) */
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_WRITE);
}
@@ -664,9 +664,9 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
return pte_pmd(pte_mkyoung(pmd_pte(pmd)));
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
+static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
- return pte_pmd(pte_mkwrite(pmd_pte(pmd)));
+ return pte_pmd(pte_mkwrite_novma(pmd_pte(pmd)));
}
static inline pmd_t pmd_wrprotect(pmd_t pmd)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 5b39918b7042b..91514d535c464 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -128,6 +128,7 @@ config S390
select ARCH_WANT_DEFAULT_BPF_JIT
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_OPTIMIZE_VMEMMAP
+ select ARCH_WANT_KERNEL_PMD_MKWRITE
select BUILDTIME_TABLE_SORT
select CLONE_BACKWARDS2
select DMA_OPS if PCI
diff --git a/arch/s390/include/asm/hugetlb.h b/arch/s390/include/asm/hugetlb.h
index ccdbccfde148c..f07267875a198 100644
--- a/arch/s390/include/asm/hugetlb.h
+++ b/arch/s390/include/asm/hugetlb.h
@@ -104,7 +104,7 @@ static inline int huge_pte_dirty(pte_t pte)
static inline pte_t huge_pte_mkwrite(pte_t pte)
{
- return pte_mkwrite(pte);
+ return pte_mkwrite_novma(pte);
}
static inline pte_t huge_pte_mkdirty(pte_t pte)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index c55f3c3365af8..83c5da39237d1 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1002,7 +1002,7 @@ static inline pte_t pte_wrprotect(pte_t pte)
return set_pte_bit(pte, __pgprot(_PAGE_PROTECT));
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
pte = set_pte_bit(pte, __pgprot(_PAGE_WRITE));
if (pte_val(pte) & _PAGE_DIRTY)
@@ -1485,7 +1485,7 @@ static inline pmd_t pmd_wrprotect(pmd_t pmd)
return set_pmd_bit(pmd, __pgprot(_SEGMENT_ENTRY_PROTECT));
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
+static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
pmd = set_pmd_bit(pmd, __pgprot(_SEGMENT_ENTRY_WRITE));
if (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY)
diff --git a/arch/sh/include/asm/pgtable_32.h b/arch/sh/include/asm/pgtable_32.h
index 21952b0946509..165b4fd081521 100644
--- a/arch/sh/include/asm/pgtable_32.h
+++ b/arch/sh/include/asm/pgtable_32.h
@@ -359,11 +359,11 @@ static inline pte_t pte_##fn(pte_t pte) { pte.pte_##h op; return pte; }
* kernel permissions), we attempt to couple them a bit more sanely here.
*/
PTE_BIT_FUNC(high, wrprotect, &= ~(_PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE));
-PTE_BIT_FUNC(high, mkwrite, |= _PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE);
+PTE_BIT_FUNC(high, mkwrite_novma, |= _PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE);
PTE_BIT_FUNC(high, mkhuge, |= _PAGE_SZHUGE);
#else
PTE_BIT_FUNC(low, wrprotect, &= ~_PAGE_RW);
-PTE_BIT_FUNC(low, mkwrite, |= _PAGE_RW);
+PTE_BIT_FUNC(low, mkwrite_novma, |= _PAGE_RW);
PTE_BIT_FUNC(low, mkhuge, |= _PAGE_SZHUGE);
#endif
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index d4330e3c57a6e..a2d9094465394 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -241,7 +241,7 @@ static inline pte_t pte_mkold(pte_t pte)
return __pte(pte_val(pte) & ~SRMMU_REF);
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return __pte(pte_val(pte) | SRMMU_WRITE);
}
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 5563efa1a19f9..4dd4f6cdc670b 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -517,7 +517,7 @@ static inline pte_t pte_mkclean(pte_t pte)
return __pte(val);
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
unsigned long val = pte_val(pte), mask;
@@ -772,11 +772,11 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
return __pmd(pte_val(pte));
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
+static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
pte_t pte = __pte(pmd_val(pmd));
- pte = pte_mkwrite(pte);
+ pte = pte_mkwrite_novma(pte);
return __pmd(pte_val(pte));
}
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index a70d1618eb35f..46f59a8bc8129 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -207,7 +207,7 @@ static inline pte_t pte_mkyoung(pte_t pte)
return(pte);
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
if (unlikely(pte_get_bits(pte, _PAGE_RW)))
return pte;
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 5700bb3379877..0aa295cc62770 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -353,7 +353,7 @@ static inline pte_t pte_mkyoung(pte_t pte)
return pte_set_flags(pte, _PAGE_ACCESSED);
}
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{
return pte_set_flags(pte, _PAGE_RW);
}
@@ -454,7 +454,7 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
return pmd_set_flags(pmd, _PAGE_ACCESSED);
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
+static inline pmd_t pmd_mkwrite_novma(pmd_t pmd)
{
return pmd_set_flags(pmd, _PAGE_RW);
}
diff --git a/arch/xtensa/include/asm/pgtable.h b/arch/xtensa/include/asm/pgtable.h
index fc7a14884c6c3..27e3ae38a5de3 100644
--- a/arch/xtensa/include/asm/pgtable.h
+++ b/arch/xtensa/include/asm/pgtable.h
@@ -262,7 +262,7 @@ static inline pte_t pte_mkdirty(pte_t pte)
{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
static inline pte_t pte_mkyoung(pte_t pte)
{ pte_val(pte) |= _PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkwrite(pte_t pte)
+static inline pte_t pte_mkwrite_novma(pte_t pte)
{ pte_val(pte) |= _PAGE_WRITABLE; return pte; }
#define pgprot_noncached(prot) \
diff --git a/include/asm-generic/hugetlb.h b/include/asm-generic/hugetlb.h
index d7f6335d39998..4da02798a00bb 100644
--- a/include/asm-generic/hugetlb.h
+++ b/include/asm-generic/hugetlb.h
@@ -22,7 +22,7 @@ static inline unsigned long huge_pte_dirty(pte_t pte)
static inline pte_t huge_pte_mkwrite(pte_t pte)
{
- return pte_mkwrite(pte);
+ return pte_mkwrite_novma(pte);
}
#ifndef __HAVE_ARCH_HUGE_PTE_WRPROTECT
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 5063b482e34f6..e6ea6e0d7d8d4 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -515,6 +515,20 @@ extern pud_t pudp_huge_clear_flush(struct vm_area_struct *vma,
pud_t *pudp);
#endif
+#ifndef pte_mkwrite
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+ return pte_mkwrite_novma(pte);
+}
+#endif
+
+#if defined(CONFIG_ARCH_WANT_PMD_MKWRITE) && !defined(pmd_mkwrite)
+static inline pmd_t pmd_mkwrite(pmd_t pmd)
+{
+ return pmd_mkwrite_novma(pmd);
+}
+#endif
+
#ifndef __HAVE_ARCH_PTEP_SET_WRPROTECT
struct mm_struct;
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long address, pte_t *ptep)
--
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