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Fri, 11 Apr 2025 15:43:57 +1000 (AEST) From: Andrew Donnellan To: linuxppc-dev@lists.ozlabs.org Cc: x86@kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pasha.tatashin@soleen.com, sweettea-kernel@dorminy.me, christophe.leroy@csgroup.eu Subject: [PATCH v14 05/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_clear() Date: Fri, 11 Apr 2025 15:43:48 +1000 Message-ID: <20250411054354.511145-6-ajd@linux.ibm.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250411054354.511145-1-ajd@linux.ibm.com> References: <20250411054354.511145-1-ajd@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: uOBT-gwSeKfRJ2B6V8auVjunVoMrBGqf X-Proofpoint-GUID: uOBT-gwSeKfRJ2B6V8auVjunVoMrBGqf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-11_01,2025-04-10_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 malwarescore=0 phishscore=0 mlxlogscore=911 adultscore=0 suspectscore=0 priorityscore=1501 spamscore=0 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504110038 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: B4655C000A X-Stat-Signature: 85xgebw6kgyc5pxzx48jz711qh5k886d X-Rspam-User: X-HE-Tag: 1744353576-292130 X-HE-Meta: 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 CTTz3EI1 0AvxpjxbXVE+47RHwwfQjKCRIqIuR2QaUadu56OzEvXiLMefrT8k4cxeikQmXdNGGIeuGNfFB0P9a+WxD71njVu/+XcVGL6WRcKMfLE2LWDtjg8gxk1W1NGEpoyjUo/XaNxAs7fQ0kCtqnIAIAjUppujQ2+XPO+Jn9vGRgRzklyTYZNDyxeV6kNk3XL4GIoAJoWZdVHjGMxrRW0z/tBdt817sV4N4BMPNAFwszCxIjEgRThMp6VYSUFwRjypzAUzz4J0skoNcZI8KNaC3Y5Q4MqjtIptSX93gErf8SiuFaMKHqxuEej9sI7qs5doYNbAAywad1rcD74LECHNxRPCipgcFVVE6Gdnejbs6 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Rohan McLure This reverts commit 1831414cd729 ("mm/page_table_check: remove unused parameter in [__]page_table_check_pmd_clear"). Reinstate previously unused parameters for the purpose of supporting powerpc platforms, as many do not encode user/kernel ownership of the page in the pte, but instead in the address of the access. Signed-off-by: Rohan McLure Reviewed-by: Pasha Tatashin Signed-off-by: Andrew Donnellan --- arch/arm64/include/asm/pgtable.h | 2 +- arch/riscv/include/asm/pgtable.h | 2 +- arch/x86/include/asm/pgtable.h | 2 +- include/linux/page_table_check.h | 11 +++++++---- include/linux/pgtable.h | 2 +- mm/page_table_check.c | 5 +++-- 6 files changed, 14 insertions(+), 10 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 6410c3583ca0..3ccebb6c090e 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1349,7 +1349,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, { pmd_t pmd = __pmd(xchg_relaxed(&pmd_val(*pmdp), 0)); - page_table_check_pmd_clear(mm, pmd); + page_table_check_pmd_clear(mm, address, pmd); return pmd; } diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index d348186f4731..beafa053a768 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -879,7 +879,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, { pmd_t pmd = __pmd(atomic_long_xchg((atomic_long_t *)pmdp, 0)); - page_table_check_pmd_clear(mm, pmd); + page_table_check_pmd_clear(mm, address, pmd); return pmd; } diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 5a71a884858e..c385ba804fda 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1387,7 +1387,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long { pmd_t pmd = native_pmdp_get_and_clear(pmdp); - page_table_check_pmd_clear(mm, pmd); + page_table_check_pmd_clear(mm, addr, pmd); return pmd; } diff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h index d01a00ffc1f9..0a6ebfa46a31 100644 --- a/include/linux/page_table_check.h +++ b/include/linux/page_table_check.h @@ -15,7 +15,8 @@ extern struct page_ext_operations page_table_check_ops; void __page_table_check_zero(struct page *page, unsigned int order); void __page_table_check_pte_clear(struct mm_struct *mm, pte_t pte); -void __page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd); +void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr, + pmd_t pmd); void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr, pud_t pud); void __page_table_check_ptes_set(struct mm_struct *mm, unsigned long addr, @@ -52,12 +53,13 @@ static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte) __page_table_check_pte_clear(mm, pte); } -static inline void page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd) +static inline void page_table_check_pmd_clear(struct mm_struct *mm, + unsigned long addr, pmd_t pmd) { if (static_branch_likely(&page_table_check_disabled)) return; - __page_table_check_pmd_clear(mm, pmd); + __page_table_check_pmd_clear(mm, addr, pmd); } static inline void page_table_check_pud_clear(struct mm_struct *mm, @@ -123,7 +125,8 @@ static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte) { } -static inline void page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd) +static inline void page_table_check_pmd_clear(struct mm_struct *mm, + unsigned long addr, pmd_t pmd) { } diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 5cc978ef1330..52553aaa2039 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -637,7 +637,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, pmd_t pmd = *pmdp; pmd_clear(pmdp); - page_table_check_pmd_clear(mm, pmd); + page_table_check_pmd_clear(mm, address, pmd); return pmd; } diff --git a/mm/page_table_check.c b/mm/page_table_check.c index aad4b7e2194d..9a6cfea0c1d4 100644 --- a/mm/page_table_check.c +++ b/mm/page_table_check.c @@ -156,7 +156,8 @@ void __page_table_check_pte_clear(struct mm_struct *mm, pte_t pte) } EXPORT_SYMBOL(__page_table_check_pte_clear); -void __page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd) +void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr, + pmd_t pmd) { if (&init_mm == mm) return; @@ -227,7 +228,7 @@ void __page_table_check_pmd_set(struct mm_struct *mm, unsigned long addr, page_table_check_pmd_flags(pmd); - __page_table_check_pmd_clear(mm, *pmdp); + __page_table_check_pmd_clear(mm, addr, *pmdp); if (pmd_user_accessible_page(pmd)) { page_table_check_set(pmd_pfn(pmd), PMD_SIZE >> PAGE_SHIFT, pmd_write(pmd));