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Tue, 11 Feb 2025 16:14:52 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 51BGEobG56361370 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 11 Feb 2025 16:14:50 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9018C2004B; Tue, 11 Feb 2025 16:14:50 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B8E2420040; Tue, 11 Feb 2025 16:14:49 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.63.197.14]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 11 Feb 2025 16:14:49 +0000 (GMT) Received: from jarvis.ozlabs.ibm.com.com (unknown [9.150.7.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 761C6600AE; Wed, 12 Feb 2025 03:14:45 +1100 (AEDT) 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 Subject: [PATCH v13 06/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pte_clear() Date: Wed, 12 Feb 2025 03:13:59 +1100 Message-ID: <20250211161404.850215-7-ajd@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250211161404.850215-1-ajd@linux.ibm.com> References: <20250211161404.850215-1-ajd@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 3-pRwAoz3aMdzeoVBSyw5a0_Rw8WKaaH X-Proofpoint-ORIG-GUID: 3-pRwAoz3aMdzeoVBSyw5a0_Rw8WKaaH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-11_07,2025-02-11_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 adultscore=0 impostorscore=0 mlxlogscore=650 clxscore=1015 priorityscore=1501 spamscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502110106 X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 5491114000E X-Stat-Signature: m35e5ofrsgug3bzdf1b1mo3cma7esrpe X-HE-Tag: 1739290498-241804 X-HE-Meta: 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 ePevpjQI EPKeXn292ag7JpGvg0uVNy3p8Z5XYj6ihWOxCqdHFDanXpF23rrtnwaBImN2lgMOQdfmLU0/6yxyh56zGk5nitW8H81i+pdo+Oy5RlvDJFjiVlUSZsx6k/Q3uEjc/egp2ooL9slfOmu5GVUqZUD3Ko6ZRTXoNrs9W+MGT5KT/wJ0Iq0Eh0wfM1Kibzl89miwfPMkkyCrgZlHF7BxJcGd7pU3htws+cT9OZCpMn6Iawfr15tbwfEb08M1UCyZ1cfrCks3hqCP9ID7hXHPosU9C5bmY4HN5z3sP5O7IkDeoZ7V9dR9TjTLwQk6b4vK+xmNBNQndlm1d1rANh3+/H66/m7hGFHqIqfKMcd5B 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 aa232204c468 ("mm/page_table_check: remove unused parameter in [__]page_table_check_pte_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 [ajd: rebase and fix additional occurrence] Signed-off-by: Andrew Donnellan --- v13: fix an additional occurrence --- arch/arm64/include/asm/pgtable.h | 2 +- arch/riscv/include/asm/pgtable.h | 2 +- arch/x86/include/asm/pgtable.h | 4 ++-- include/linux/page_table_check.h | 11 +++++++---- include/linux/pgtable.h | 4 ++-- mm/page_table_check.c | 7 ++++--- 6 files changed, 17 insertions(+), 13 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 58108086f962..f9effb5ddf1a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1281,7 +1281,7 @@ static inline pte_t __ptep_get_and_clear(struct mm_struct *mm, { pte_t pte = __pte(xchg_relaxed(&pte_val(*ptep), 0)); - page_table_check_pte_clear(mm, pte); + page_table_check_pte_clear(mm, address, pte); return pte; } diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 8cb0d5e2ee47..c8d59feb4963 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -593,7 +593,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, { pte_t pte = __pte(atomic_long_xchg((atomic_long_t *)ptep, 0)); - page_table_check_pte_clear(mm, pte); + page_table_check_pte_clear(mm, address, pte); return pte; } diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 9027467bbde7..dbb376400ac7 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1318,7 +1318,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t pte = native_ptep_get_and_clear(ptep); - page_table_check_pte_clear(mm, pte); + page_table_check_pte_clear(mm, addr, pte); return pte; } @@ -1334,7 +1334,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, * care about updates and native needs no locking */ pte = native_local_ptep_get_and_clear(ptep); - page_table_check_pte_clear(mm, pte); + page_table_check_pte_clear(mm, addr, pte); } else { pte = ptep_get_and_clear(mm, addr, ptep); } diff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h index 0a6ebfa46a31..48721a4a2b84 100644 --- a/include/linux/page_table_check.h +++ b/include/linux/page_table_check.h @@ -14,7 +14,8 @@ extern struct static_key_true page_table_check_disabled; 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_pte_clear(struct mm_struct *mm, unsigned long addr, + pte_t pte); 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, @@ -45,12 +46,13 @@ static inline void page_table_check_free(struct page *page, unsigned int order) __page_table_check_zero(page, order); } -static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte) +static inline void page_table_check_pte_clear(struct mm_struct *mm, + unsigned long addr, pte_t pte) { if (static_branch_likely(&page_table_check_disabled)) return; - __page_table_check_pte_clear(mm, pte); + __page_table_check_pte_clear(mm, addr, pte); } static inline void page_table_check_pmd_clear(struct mm_struct *mm, @@ -121,7 +123,8 @@ static inline void page_table_check_free(struct page *page, unsigned int order) { } -static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte) +static inline void page_table_check_pte_clear(struct mm_struct *mm, + unsigned long addr, pte_t pte) { } diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index d34d0ec2d676..111c507c2c53 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -481,7 +481,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, { pte_t pte = ptep_get(ptep); pte_clear(mm, address, ptep); - page_table_check_pte_clear(mm, pte); + page_table_check_pte_clear(mm, address, pte); return pte; } #endif @@ -540,7 +540,7 @@ static inline void ptep_clear(struct mm_struct *mm, unsigned long addr, * No need for ptep_get_and_clear(): page table check doesn't care about * any bits that could have been set by HW concurrently. */ - page_table_check_pte_clear(mm, pte); + page_table_check_pte_clear(mm, addr, pte); } #ifdef CONFIG_GUP_GET_PXX_LOW_HIGH diff --git a/mm/page_table_check.c b/mm/page_table_check.c index 12781847bec7..4cb3e9ae57ff 100644 --- a/mm/page_table_check.c +++ b/mm/page_table_check.c @@ -160,7 +160,8 @@ void __page_table_check_zero(struct page *page, unsigned int order) page_ext_put(page_ext); } -void __page_table_check_pte_clear(struct mm_struct *mm, pte_t pte) +void __page_table_check_pte_clear(struct mm_struct *mm, unsigned long addr, + pte_t pte) { if (&init_mm == mm) return; @@ -222,7 +223,7 @@ void __page_table_check_ptes_set(struct mm_struct *mm, unsigned long addr, page_table_check_pte_flags(pte); for (i = 0; i < nr; i++) - __page_table_check_pte_clear(mm, ptep_get(ptep + i)); + __page_table_check_pte_clear(mm, addr, ptep_get(ptep + i)); if (pte_user_accessible_page(pte)) page_table_check_set(pte_pfn(pte), nr, pte_write(pte)); } @@ -280,7 +281,7 @@ void __page_table_check_pte_clear_range(struct mm_struct *mm, if (WARN_ON(!ptep)) return; for (i = 0; i < PTRS_PER_PTE; i++) { - __page_table_check_pte_clear(mm, ptep_get(ptep)); + __page_table_check_pte_clear(mm, addr, ptep_get(ptep)); addr += PAGE_SIZE; ptep++; }