* + mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch added to -mm tree
@ 2022-02-22 3:12 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-02-22 3:12 UTC (permalink / raw)
To: mm-commits, hch, anshuman.khandual, akpm
The patch titled
Subject: mm/mmap: add new config ARCH_HAS_VM_GET_PAGE_PROT
has been added to the -mm tree. Its filename is
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** 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: Anshuman Khandual <anshuman.khandual@arm.com>
Subject: mm/mmap: add new config ARCH_HAS_VM_GET_PAGE_PROT
Add a new config ARCH_HAS_VM_GET_PAGE_PROT, which when subscribed enables
a given platform to define its own vm_get_page_prot(). This framework
will help remove protection_map[] dependency going forward.
Link: https://lkml.kernel.org/r/1645425519-9034-4-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/Kconfig | 3 +++
mm/mmap.c | 2 ++
2 files changed, 5 insertions(+)
--- a/mm/Kconfig~mm-mmap-add-new-config-arch_has_vm_get_page_prot
+++ a/mm/Kconfig
@@ -747,6 +747,9 @@ config ARCH_HAS_CACHE_LINE_SIZE
config ARCH_HAS_FILTER_PGPROT
bool
+config ARCH_HAS_VM_GET_PAGE_PROT
+ bool
+
config ARCH_HAS_PTE_DEVMAP
bool
--- a/mm/mmap.c~mm-mmap-add-new-config-arch_has_vm_get_page_prot
+++ a/mm/mmap.c
@@ -81,6 +81,7 @@ static void unmap_region(struct mm_struc
struct vm_area_struct *vma, struct vm_area_struct *prev,
unsigned long start, unsigned long end);
+#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT
/* description of effects of mapping type and prot in current implementation.
* this is due to the limited x86 page protection hardware. The expected
* behavior is in parens:
@@ -136,6 +137,7 @@ pgprot_t vm_get_page_prot(unsigned long
return arch_filter_pgprot(ret);
}
EXPORT_SYMBOL(vm_get_page_prot);
+#endif /* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags)
{
_
Patches currently in -mm which might be from anshuman.khandual@arm.com are
mm-generalize-arch_has_filter_pgprot.patch
mm-merge-pte_mkhuge-call-into-arch_make_huge_pte.patch
mm-debug_vm_pgtable-drop-protection_map-usage.patch
mm-mmap-clarify-protection_map-indices.patch
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
powerpc-mm-enable-arch_has_vm_get_page_prot.patch
arm64-mm-enable-arch_has_vm_get_page_prot.patch
sparc-mm-enable-arch_has_vm_get_page_prot.patch
mips-mm-enable-arch_has_vm_get_page_prot.patch
m68k-mm-enable-arch_has_vm_get_page_prot.patch
arm-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-protection_map.patch
mm-mmap-drop-arch_filter_pgprot.patch
mm-mmap-drop-arch_vm_get_page_pgprot.patch
s390-mm-enable-arch_has_vm_get_page_prot.patch
riscv-mm-enable-arch_has_vm_get_page_prot.patch
alpha-mm-enable-arch_has_vm_get_page_prot.patch
sh-mm-enable-arch_has_vm_get_page_prot.patch
arc-mm-enable-arch_has_vm_get_page_prot.patch
csky-mm-enable-arch_has_vm_get_page_prot.patch
extensa-mm-enable-arch_has_vm_get_page_prot.patch
parisc-mm-enable-arch_has_vm_get_page_prot.patch
openrisc-mm-enable-arch_has_vm_get_page_prot.patch
um-mm-enable-arch_has_vm_get_page_prot.patch
microblaze-mm-enable-arch_has_vm_get_page_prot.patch
nios2-mm-enable-arch_has_vm_get_page_prot.patch
hexagon-mm-enable-arch_has_vm_get_page_prot.patch
nds32-mm-enable-arch_has_vm_get_page_prot.patch
ia64-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-generic-vm_get_page_prot.patch
mm-mmap-drop-arch_has_vm_get_page_prot.patch
mm-hugetlb-generalize-arch_want_general_hugetlb.patch
mm-migration-add-trace-events-for-thp-migrations.patch
mm-migration-add-trace-events-for-base-page-and-hugetlb-migrations.patch
^ permalink raw reply [flat|nested] 3+ messages in thread
* + mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch added to -mm tree
@ 2022-04-07 23:26 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-04-07 23:26 UTC (permalink / raw)
To: mm-commits, will, tglx, paulus, mpe, mingo, khalid.aziz, hch,
davem, catalin.marinas, anshuman.khandual, akpm
The patch titled
Subject: mm/mmap: add new config ARCH_HAS_VM_GET_PAGE_PROT
has been added to the -mm tree. Its filename is
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** 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: Anshuman Khandual <anshuman.khandual@arm.com>
Subject: mm/mmap: add new config ARCH_HAS_VM_GET_PAGE_PROT
Patch series "mm/mmap: Drop arch_vm_get_page_prot() and arch_filter_pgprot()", v4.
protection_map[] is an array based construct that translates given
vm_flags combination. This array contains page protection map, which is
populated by the platform via [__S000 .. __S111] and [__P000 .. __P111]
exported macros. Primary usage for protection_map[] is for
vm_get_page_prot(), which is used to determine page protection value for a
given vm_flags. vm_get_page_prot() implementation, could again call
platform overrides arch_vm_get_page_prot() and arch_filter_pgprot(). Some
platforms override protection_map[] that was originally built with
__SXXX/__PXXX with different runtime values.
Currently there are multiple layers of abstraction i.e __SXXX/__PXXX
macros, protection_map[], arch_vm_get_page_prot() and arch_filter_pgprot()
built between the platform and generic MM, finally defining
vm_get_page_prot().
Hence this series proposes to drop later two abstraction levels and
instead just move the responsibility of defining vm_get_page_prot() to the
platform (still utilizing generic protection_map[] array) itself making it
clean and simple.
This first introduces ARCH_HAS_VM_GET_PAGE_PROT which enables the
platforms to define custom vm_get_page_prot(). This starts converting
platforms that define the overrides arch_filter_pgprot() or
arch_vm_get_page_prot() which enables for those constructs to be dropped
off completely.
The series has been inspired from an earlier discuss with Christoph Hellwig
https://lore.kernel.org/all/1632712920-8171-1-git-send-email-anshuman.khandual@arm.com/
This patch (of 7):
Add a new config ARCH_HAS_VM_GET_PAGE_PROT, which when subscribed enables
a given platform to define its own vm_get_page_prot() but still utilizing
the generic protection_map[] array.
Link: https://lkml.kernel.org/r/20220407103251.1209606-1-anshuman.khandual@arm.com
Link: https://lkml.kernel.org/r/20220407103251.1209606-2-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/Kconfig | 3 +++
mm/mmap.c | 2 ++
2 files changed, 5 insertions(+)
--- a/mm/Kconfig~mm-mmap-add-new-config-arch_has_vm_get_page_prot
+++ a/mm/Kconfig
@@ -765,6 +765,9 @@ config ARCH_HAS_CURRENT_STACK_POINTER
config ARCH_HAS_FILTER_PGPROT
bool
+config ARCH_HAS_VM_GET_PAGE_PROT
+ bool
+
config ARCH_HAS_PTE_DEVMAP
bool
--- a/mm/mmap.c~mm-mmap-add-new-config-arch_has_vm_get_page_prot
+++ a/mm/mmap.c
@@ -120,6 +120,7 @@ pgprot_t protection_map[16] __ro_after_i
[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __S111
};
+#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT
#ifndef CONFIG_ARCH_HAS_FILTER_PGPROT
static inline pgprot_t arch_filter_pgprot(pgprot_t prot)
{
@@ -136,6 +137,7 @@ pgprot_t vm_get_page_prot(unsigned long
return arch_filter_pgprot(ret);
}
EXPORT_SYMBOL(vm_get_page_prot);
+#endif /* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags)
{
_
Patches currently in -mm which might be from anshuman.khandual@arm.com are
mm-debug_vm_pgtable-drop-protection_map-usage.patch
mm-mmap-clarify-protection_map-indices.patch
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
powerpc-mm-enable-arch_has_vm_get_page_prot.patch
arm64-mm-enable-arch_has_vm_get_page_prot.patch
sparc-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-arch_filter_pgprot.patch
mm-mmap-drop-arch_vm_get_page_pgprot.patch
^ permalink raw reply [flat|nested] 3+ messages in thread
* + mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch added to -mm tree
@ 2022-04-14 21:10 Andrew Morton
0 siblings, 0 replies; 3+ messages in thread
From: Andrew Morton @ 2022-04-14 21:10 UTC (permalink / raw)
To: mm-commits, will, tglx, paulus, mpe, mingo, khalid.aziz, hch,
davem, christophe.leroy, catalin.marinas, anshuman.khandual, akpm
The patch titled
Subject: mm/mmap: add new config ARCH_HAS_VM_GET_PAGE_PROT
has been added to the -mm tree. Its filename is
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** 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: Anshuman Khandual <anshuman.khandual@arm.com>
Subject: mm/mmap: add new config ARCH_HAS_VM_GET_PAGE_PROT
Patch series "mm/mmap: Drop arch_vm_get_page_prot() and arch_filter_pgprot()", v7.
protection_map[] is an array based construct that translates given
vm_flags combination. This array contains page protection map, which is
populated by the platform via [__S000 .. __S111] and [__P000 .. __P111]
exported macros. Primary usage for protection_map[] is for
vm_get_page_prot(), which is used to determine page protection value for a
given vm_flags. vm_get_page_prot() implementation, could again call
platform overrides arch_vm_get_page_prot() and arch_filter_pgprot(). Some
platforms override protection_map[] that was originally built with
__SXXX/__PXXX with different runtime values.
Currently there are multiple layers of abstraction i.e __SXXX/__PXXX
macros , protection_map[], arch_vm_get_page_prot() and
arch_filter_pgprot() built between the platform and generic MM, finally
defining vm_get_page_prot().
Hence this series proposes to drop later two abstraction levels and
instead just move the responsibility of defining vm_get_page_prot() to the
platform (still utilizing generic protection_map[] array) itself making it
clean and simple.
This first introduces ARCH_HAS_VM_GET_PAGE_PROT which enables the
platforms to define custom vm_get_page_prot(). This starts converting
platforms that define the overrides arch_filter_pgprot() or
arch_vm_get_page_prot() which enables for those constructs to be dropped
off completely.
The series has been inspired from an earlier discuss with Christoph Hellwig
https://lore.kernel.org/all/1632712920-8171-1-git-send-email-anshuman.khandual@arm.com/
This patch (of 7):
Add a new config ARCH_HAS_VM_GET_PAGE_PROT, which when subscribed enables
a given platform to define its own vm_get_page_prot() but still utilizing
the generic protection_map[] array.
Link: https://lkml.kernel.org/r/20220414062125.609297-1-anshuman.khandual@arm.com
Link: https://lkml.kernel.org/r/20220414062125.609297-2-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
--- a/mm/Kconfig~mm-mmap-add-new-config-arch_has_vm_get_page_prot
+++ a/mm/Kconfig
@@ -765,6 +765,9 @@ config ARCH_HAS_CURRENT_STACK_POINTER
config ARCH_HAS_FILTER_PGPROT
bool
+config ARCH_HAS_VM_GET_PAGE_PROT
+ bool
+
config ARCH_HAS_PTE_DEVMAP
bool
--- a/mm/mmap.c~mm-mmap-add-new-config-arch_has_vm_get_page_prot
+++ a/mm/mmap.c
@@ -120,6 +120,7 @@ pgprot_t protection_map[16] __ro_after_i
[VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = __S111
};
+#ifndef CONFIG_ARCH_HAS_VM_GET_PAGE_PROT
#ifndef CONFIG_ARCH_HAS_FILTER_PGPROT
static inline pgprot_t arch_filter_pgprot(pgprot_t prot)
{
@@ -136,6 +137,7 @@ pgprot_t vm_get_page_prot(unsigned long
return arch_filter_pgprot(ret);
}
EXPORT_SYMBOL(vm_get_page_prot);
+#endif /* CONFIG_ARCH_HAS_VM_GET_PAGE_PROT */
static pgprot_t vm_pgprot_modify(pgprot_t oldprot, unsigned long vm_flags)
{
_
Patches currently in -mm which might be from anshuman.khandual@arm.com are
mm-debug_vm_pgtable-drop-protection_map-usage.patch
mm-mmap-clarify-protection_map-indices.patch
mm-mmap-add-new-config-arch_has_vm_get_page_prot.patch
powerpc-mm-enable-arch_has_vm_get_page_prot.patch
arm64-mm-enable-arch_has_vm_get_page_prot.patch
sparc-mm-enable-arch_has_vm_get_page_prot.patch
mm-mmap-drop-arch_filter_pgprot.patch
mm-mmap-drop-arch_vm_get_page_pgprot.patch
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-04-14 21:10 UTC | newest]
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2022-04-07 23:26 Andrew Morton
2022-02-22 3:12 Andrew Morton
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