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Tue, 9 Sep 2025 09:14:40 +0000 (GMT) From: Andrew Donnellan To: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, x86@kernel.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, nicholas@linux.ibm.com, christophe.leroy@csgroup.eu, alexghiti@rivosinc.com, Ingo Molnar Subject: [PATCH v17 04/12] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd[s]_set() Date: Tue, 9 Sep 2025 19:13:27 +1000 Message-ID: <20250909091335.183439-5-ajd@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250909091335.183439-1-ajd@linux.ibm.com> References: <20250909091335.183439-1-ajd@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTA2MDE5NSBTYWx0ZWRfX4GhJVpm2shjG HQV7N+ibunsOvwX/95yjcTjaZ3UIZgk03xt/1P9pbpagE0cwDmQtQ/T7Ba5jzR+YYL6WLQvEww8 xLI+UedZsL5eLgwBO4kkLUoCnfW4u22YaPjMk3Rp4CxYTbMMfToBuHRuPo17lMB/LHnQJYkfD71 wo+fVb11PzfsYpOY8AePuiN0awPFvodU4pM0DdYnv+DYxByZ1a2SZ9W8NfUC2GTa3xpJ3DFiUnn g/WOqxazwFA5BOUa1VzfInQunWr+PfA/qcEVafCByzQJ1CDLVZEJPuUrYzFI2pXZDdQhWM3Dyyp 6HmoxYUKgzbhkosY5Oceu1BZfrAV52l1uvwA09eRhBeLBUsg9jDjued2POrAwC6Q7aP0XaYRo2u RD01JPBn X-Proofpoint-ORIG-GUID: ODVpmmO40ri_oG7Hx-KcEX8r7lrbOwML X-Proofpoint-GUID: ODVpmmO40ri_oG7Hx-KcEX8r7lrbOwML X-Authority-Analysis: v=2.4 cv=StCQ6OO0 c=1 sm=1 tr=0 ts=68bff007 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=yJojWOMRYYMA:10 a=VnNF1IyMAAAA:8 a=7ipKWUHlAAAA:8 a=VwQbUJbxAAAA:8 a=h0uksLzaAAAA:8 a=-IAaNFHw-wEKn7DCNmAA:9 a=gpc5p9EgBqZVLdJeV_V1:22 a=MSi_79tMYmZZG2gvAgS0:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-08_06,2025-09-08_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 malwarescore=0 bulkscore=0 clxscore=1015 adultscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509060195 Content-Type: text/plain; charset="utf-8" From: Rohan McLure This reverts commit a3b837130b58 ("mm/page_table_check: remove unused parameter in [__]page_table_check_pmd_set"). 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. Apply this to __page_table_check_pmds_set(), page_table_check_pmd_set(), and the page_table_check_pmd_set() wrapper macro. [ajd@linux.ibm.com: rebase on arm64 + riscv changes, update commit message] Signed-off-by: Rohan McLure Reviewed-by: Pasha Tatashin Acked-by: Ingo Molnar # x86 Acked-by: Alexandre Ghiti # riscv Signed-off-by: Andrew Donnellan --- v13: remove inaccurate comment on riscv in the commit message v14: rebase v15: rebase, amend commit message --- arch/arm64/include/asm/pgtable.h | 5 +++-- arch/riscv/include/asm/pgtable.h | 4 ++-- arch/x86/include/asm/pgtable.h | 4 ++-- include/linux/page_table_check.h | 12 ++++++------ mm/page_table_check.c | 4 ++-- 5 files changed, 15 insertions(+), 14 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgta= ble.h index 8070b653c409..9fe3af8b4cad 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -709,7 +709,8 @@ static inline void __set_ptes_anysz(struct mm_struct *m= m, unsigned long addr, page_table_check_ptes_set(mm, ptep, pte, nr); break; case PMD_SIZE: - page_table_check_pmds_set(mm, (pmd_t *)ptep, pte_pmd(pte), nr); + page_table_check_pmds_set(mm, addr, (pmd_t *)ptep, + pte_pmd(pte), nr); break; #ifndef __PAGETABLE_PMD_FOLDED case PUD_SIZE: @@ -1514,7 +1515,7 @@ static inline void pmdp_set_wrprotect(struct mm_struc= t *mm, static inline pmd_t pmdp_establish(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp, pmd_t pmd) { - page_table_check_pmd_set(vma->vm_mm, pmdp, pmd); + page_table_check_pmd_set(vma->vm_mm, address, pmdp, pmd); return __pmd(xchg_relaxed(&pmd_val(*pmdp), pmd_val(pmd))); } #endif diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgta= ble.h index 3a113c837605..98e56d4ff840 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -805,7 +805,7 @@ static inline pud_t pud_mkspecial(pud_t pud) static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { - page_table_check_pmd_set(mm, pmdp, pmd); + page_table_check_pmd_set(mm, addr, pmdp, pmd); return __set_pte_at(mm, (pte_t *)pmdp, pmd_pte(pmd)); } =20 @@ -876,7 +876,7 @@ static inline void pmdp_set_wrprotect(struct mm_struct = *mm, static inline pmd_t pmdp_establish(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp, pmd_t pmd) { - page_table_check_pmd_set(vma->vm_mm, pmdp, pmd); + page_table_check_pmd_set(vma->vm_mm, address, pmdp, pmd); return __pmd(atomic_long_xchg((atomic_long_t *)pmdp, pmd_val(pmd))); } =20 diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 0603793acb3a..8ee301b16b50 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1213,7 +1213,7 @@ static inline pud_t native_local_pudp_get_and_clear(p= ud_t *pudp) static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { - page_table_check_pmd_set(mm, pmdp, pmd); + page_table_check_pmd_set(mm, addr, pmdp, pmd); set_pmd(pmdp, pmd); } =20 @@ -1356,7 +1356,7 @@ static inline void pmdp_set_wrprotect(struct mm_struc= t *mm, static inline pmd_t pmdp_establish(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp, pmd_t pmd) { - page_table_check_pmd_set(vma->vm_mm, pmdp, pmd); + page_table_check_pmd_set(vma->vm_mm, address, pmdp, pmd); if (IS_ENABLED(CONFIG_SMP)) { return xchg(pmdp, pmd); } else { diff --git a/include/linux/page_table_check.h b/include/linux/page_table_ch= eck.h index 0bf18b884a12..cf7c28d8d468 100644 --- a/include/linux/page_table_check.h +++ b/include/linux/page_table_check.h @@ -19,8 +19,8 @@ void __page_table_check_pmd_clear(struct mm_struct *mm, p= md_t pmd); void __page_table_check_pud_clear(struct mm_struct *mm, pud_t pud); void __page_table_check_ptes_set(struct mm_struct *mm, pte_t *ptep, pte_t = pte, unsigned int nr); -void __page_table_check_pmds_set(struct mm_struct *mm, pmd_t *pmdp, pmd_t = pmd, - unsigned int nr); +void __page_table_check_pmds_set(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd, unsigned int nr); void __page_table_check_puds_set(struct mm_struct *mm, unsigned long addr, pud_t *pudp, pud_t pud, unsigned int nr); void __page_table_check_pte_clear_range(struct mm_struct *mm, @@ -77,12 +77,12 @@ static inline void page_table_check_ptes_set(struct mm_= struct *mm, } =20 static inline void page_table_check_pmds_set(struct mm_struct *mm, - pmd_t *pmdp, pmd_t pmd, unsigned int nr) + unsigned long addr, pmd_t *pmdp, pmd_t pmd, unsigned int nr) { if (static_branch_likely(&page_table_check_disabled)) return; =20 - __page_table_check_pmds_set(mm, pmdp, pmd, nr); + __page_table_check_pmds_set(mm, addr, pmdp, pmd, nr); } =20 static inline void page_table_check_puds_set(struct mm_struct *mm, @@ -132,7 +132,7 @@ static inline void page_table_check_ptes_set(struct mm_= struct *mm, } =20 static inline void page_table_check_pmds_set(struct mm_struct *mm, - pmd_t *pmdp, pmd_t pmd, unsigned int nr) + unsigned long addr, pmd_t *pmdp, pmd_t pmd, unsigned int nr) { } =20 @@ -149,7 +149,7 @@ static inline void page_table_check_pte_clear_range(str= uct mm_struct *mm, =20 #endif /* CONFIG_PAGE_TABLE_CHECK */ =20 -#define page_table_check_pmd_set(mm, pmdp, pmd) page_table_check_pmds_set(= mm, pmdp, pmd, 1) +#define page_table_check_pmd_set(mm, addr, pmdp, pmd) page_table_check_pmd= s_set(mm, addr, pmdp, pmd, 1) #define page_table_check_pud_set(mm, addr, pudp, pud) page_table_check_pud= s_set(mm, addr, pudp, pud, 1) =20 #endif /* __LINUX_PAGE_TABLE_CHECK_H */ diff --git a/mm/page_table_check.c b/mm/page_table_check.c index 3c39e4375886..09258f2ad93f 100644 --- a/mm/page_table_check.c +++ b/mm/page_table_check.c @@ -218,8 +218,8 @@ static inline void page_table_check_pmd_flags(pmd_t pmd) WARN_ON_ONCE(swap_cached_writable(pmd_to_swp_entry(pmd))); } =20 -void __page_table_check_pmds_set(struct mm_struct *mm, pmd_t *pmdp, pmd_t = pmd, - unsigned int nr) +void __page_table_check_pmds_set(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd, unsigned int nr) { unsigned long stride =3D PMD_SIZE >> PAGE_SHIFT; unsigned int i; --=20 2.51.0