From: Tong Tiangen <tongtiangen@huawei.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>, <x86@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
Andrew Morton <akpm@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-riscv@lists.infradead.org>,
Tong Tiangen <tongtiangen@huawei.com>
Subject: [PATCH -next 2/4] mm: page_table_check: add hooks to public helpers
Date: Thu, 17 Mar 2022 14:12:01 +0000 [thread overview]
Message-ID: <20220317141203.3646253-3-tongtiangen@huawei.com> (raw)
In-Reply-To: <20220317141203.3646253-1-tongtiangen@huawei.com>
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.
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
---
arch/x86/include/asm/pgtable.h | 10 ----------
include/linux/pgtable.h | 27 +++++++++++++++++++--------
2 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 8cd6514e3052..8c85f2eabbaa 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1077,16 +1077,6 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
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)
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index f4f4077b97aa..d27fd0ed84a9 100644
--- a/include/linux/pgtable.h
+++ b/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(struct vm_area_struct *vma,
#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 +267,23 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
{
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)
+{
+#ifdef CONFIG_PAGE_TABLE_CHECK
+ ptep_get_and_clear(mm, addr, ptep);
+#else
+ pte_clear(mm, addr, ptep);
+#endif
+}
+#endif
+
#ifndef __HAVE_ARCH_PTEP_GET
static inline pte_t ptep_get(pte_t *ptep)
{
@@ -347,7 +353,10 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
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 +368,8 @@ static inline pud_t pudp_huge_get_and_clear(struct mm_struct *mm,
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 */
--
2.18.0.huawei.25
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next prev parent reply other threads:[~2022-03-17 13:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-17 14:11 [PATCH -next 0/4]mm: page_table_check: add support on arm64 and riscv Tong Tiangen
2022-03-17 14:12 ` [PATCH -next 1/4] mm: page_table_check: move pxx_user_accessible_page into x86 Tong Tiangen
2022-03-17 14:12 ` Tong Tiangen [this message]
2022-03-17 14:12 ` [PATCH -next 3/4] arm64: mm: add support for page table check Tong Tiangen
2022-03-17 19:00 ` Catalin Marinas
2022-03-18 3:58 ` Tong Tiangen
2022-03-18 17:18 ` Catalin Marinas
2022-03-21 6:15 ` Tong Tiangen
2022-03-21 16:40 ` Catalin Marinas
2022-03-22 3:07 ` Tong Tiangen
2022-03-17 14:12 ` [PATCH -next 4/4] riscv: " Tong Tiangen
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