* + mm-page_table_check-add-hooks-to-public-helpers.patch added to -mm tree
@ 2022-04-21 20:36 Andrew Morton
0 siblings, 0 replies; only message in thread
From: Andrew Morton @ 2022-04-21 20:36 UTC (permalink / raw)
To: mm-commits, will, wangkefeng.wang, tglx, paul.walmsley,
pasha.tatashin, palmer, mingo, hpa, guohanjun, dave.hansen,
catalin.marinas, bp, aou, anshuman.khandual, tongtiangen, akpm
The patch titled
Subject: mm: page_table_check: add hooks to public helpers
has been added to the -mm tree. Its filename is
mm-page_table_check-add-hooks-to-public-helpers.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-page_table_check-add-hooks-to-public-helpers.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_table_check-add-hooks-to-public-helpers.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
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------------------------------------------------------
From: Tong Tiangen <tongtiangen@huawei.com>
Subject: mm: page_table_check: add hooks to public helpers
Move ptep_clear() to the include/linux/pgtable.h and add page table check
relate hooks to some helpers, it's prepare for support page table check
feature on new architecture.
Link: https://lkml.kernel.org/r/20220421082042.1167967-4-tongtiangen@huawei.com
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
Acked-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Guohanjun <guohanjun@huawei.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/x86/include/asm/pgtable.h | 10 ----------
include/linux/pgtable.h | 26 ++++++++++++++++++--------
2 files changed, 18 insertions(+), 18 deletions(-)
--- a/arch/x86/include/asm/pgtable.h~mm-page_table_check-add-hooks-to-public-helpers
+++ a/arch/x86/include/asm/pgtable.h
@@ -1077,16 +1077,6 @@ static inline pte_t ptep_get_and_clear_f
return pte;
}
-#define __HAVE_ARCH_PTEP_CLEAR
-static inline void ptep_clear(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep)
-{
- if (IS_ENABLED(CONFIG_PAGE_TABLE_CHECK))
- ptep_get_and_clear(mm, addr, ptep);
- else
- pte_clear(mm, addr, ptep);
-}
-
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
--- a/include/linux/pgtable.h~mm-page_table_check-add-hooks-to-public-helpers
+++ a/include/linux/pgtable.h
@@ -12,6 +12,7 @@
#include <linux/bug.h>
#include <linux/errno.h>
#include <asm-generic/pgtable_uffd.h>
+#include <linux/page_table_check.h>
#if 5 - defined(__PAGETABLE_P4D_FOLDED) - defined(__PAGETABLE_PUD_FOLDED) - \
defined(__PAGETABLE_PMD_FOLDED) != CONFIG_PGTABLE_LEVELS
@@ -259,14 +260,6 @@ static inline int pmdp_clear_flush_young
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#endif
-#ifndef __HAVE_ARCH_PTEP_CLEAR
-static inline void ptep_clear(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep)
-{
- pte_clear(mm, addr, ptep);
-}
-#endif
-
#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
unsigned long address,
@@ -274,10 +267,22 @@ static inline pte_t ptep_get_and_clear(s
{
pte_t pte = *ptep;
pte_clear(mm, address, ptep);
+ page_table_check_pte_clear(mm, address, pte);
return pte;
}
#endif
+#ifndef __HAVE_ARCH_PTEP_CLEAR
+static inline void ptep_clear(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep)
+{
+ if (IS_ENABLED(CONFIG_PAGE_TABLE_CHECK))
+ ptep_get_and_clear(mm, addr, ptep);
+ else
+ pte_clear(mm, addr, ptep);
+}
+#endif
+
#ifndef __HAVE_ARCH_PTEP_GET
static inline pte_t ptep_get(pte_t *ptep)
{
@@ -347,7 +352,10 @@ static inline pmd_t pmdp_huge_get_and_cl
pmd_t *pmdp)
{
pmd_t pmd = *pmdp;
+
pmd_clear(pmdp);
+ page_table_check_pmd_clear(mm, address, pmd);
+
return pmd;
}
#endif /* __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR */
@@ -359,6 +367,8 @@ static inline pud_t pudp_huge_get_and_cl
pud_t pud = *pudp;
pud_clear(pudp);
+ page_table_check_pud_clear(mm, address, pud);
+
return pud;
}
#endif /* __HAVE_ARCH_PUDP_HUGE_GET_AND_CLEAR */
_
Patches currently in -mm which might be from tongtiangen@huawei.com are
mm-page_table_check-using-pxd_size-instead-of-pxd_page_size.patch
mm-page_table_check-add-hooks-to-public-helpers.patch
riscv-mm-add-support-for-page-table-check.patch
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