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Wed, 13 Aug 2025 06:26:59 +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, Rohan McLure , Ingo Molnar Subject: [PATCH v16 03/13] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pud[s]_set() Date: Wed, 13 Aug 2025 16:26:04 +1000 Message-ID: <20250813062614.51759-4-ajd@linux.ibm.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250813062614.51759-1-ajd@linux.ibm.com> References: <20250813062614.51759-1-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: AW1haW4tMjUwODEyMDIyNCBTYWx0ZWRfX1Bggf8ydEAS0 KVC14FBLkEXZVP3b/ZrT3pNjZAYt0IFbyOyw+dTnPqODTH6Q9I3+naEB/yNncAbhFhIaXAtJitd C8F5sD9kMRnTlptbFdPRdD4eaUd2BEtWUsiAFWXveefnbarOxE5RrlNQu6XHmf6De7xLKRe6zYr ZJ80nYf8frsUdayJ9NO2kE1H09mbh0jyV0E4sau7c+FEFgmQ5To82c49WUzq3FdxNkR12VFnlPa 05T2CrctgxsjXgxG4GR2OKQvm6M5V20cve8ut/LI4KWZefkDxNzMgGSMmlSGVTktzlIz8+rt3w/ kdr6AyprJFbJYpj7d3b5yJ8IbLcgJbOL6E18N7l7wNVQUCMG0ii+g9I899ln+3gbkU3M6LSKUUJ vDX3SqS3 X-Authority-Analysis: v=2.4 cv=d/31yQjE c=1 sm=1 tr=0 ts=689c303c cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=2OwXVqhp2XgA:10 a=VnNF1IyMAAAA:8 a=7ipKWUHlAAAA:8 a=VwQbUJbxAAAA:8 a=3Toew5EgkJ5X0DR0WCAA:9 a=gpc5p9EgBqZVLdJeV_V1:22 X-Proofpoint-GUID: PdA4B6wbDskCy3jQX6Huf3piNDjKdvlV X-Proofpoint-ORIG-GUID: PdA4B6wbDskCy3jQX6Huf3piNDjKdvlV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-12_08,2025-08-11_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 suspectscore=0 impostorscore=0 priorityscore=1501 phishscore=0 spamscore=0 adultscore=0 bulkscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508120224 Content-Type: text/plain; charset="utf-8" From: Rohan McLure This reverts commit 6d144436d954 ("mm/page_table_check: remove unused parameter in [__]page_table_check_pud_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_puds_set(), page_table_check_puds_set() and the page_table_check_pud_set() wrapper macro. [ajd@linux.ibm.com: rebase on riscv + arm64 changes, update commit message] Signed-off-by: Rohan McLure Reviewed-by: Pasha Tatashin Acked-by: Ingo Molnar # x86 Signed-off-by: Andrew Donnellan Acked-by: Alexandre Ghiti # riscv --- v13: remove inaccurate comment on riscv in the commit message v14: fix an x86 usage I missed (found by akpm) v15: rebase, amend commit message --- arch/arm64/include/asm/pgtable.h | 3 ++- 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, 14 insertions(+), 13 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgta= ble.h index 66b5309fcad8..8070b653c409 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -713,7 +713,8 @@ static inline void __set_ptes_anysz(struct mm_struct *m= m, unsigned long addr, break; #ifndef __PAGETABLE_PMD_FOLDED case PUD_SIZE: - page_table_check_puds_set(mm, (pud_t *)ptep, pte_pud(pte), nr); + page_table_check_puds_set(mm, addr, (pud_t *)ptep, + pte_pud(pte), nr); break; #endif default: diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgta= ble.h index 91697fbf1f90..3ed0f5e4879d 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -812,7 +812,7 @@ static inline void set_pmd_at(struct mm_struct *mm, uns= igned long addr, static inline void set_pud_at(struct mm_struct *mm, unsigned long addr, pud_t *pudp, pud_t pud) { - page_table_check_pud_set(mm, pudp, pud); + page_table_check_pud_set(mm, addr, pudp, pud); return __set_pte_at(mm, (pte_t *)pudp, pud_pte(pud)); } =20 @@ -958,7 +958,7 @@ static inline void update_mmu_cache_pud(struct vm_area_= struct *vma, static inline pud_t pudp_establish(struct vm_area_struct *vma, unsigned long address, pud_t *pudp, pud_t pud) { - page_table_check_pud_set(vma->vm_mm, pudp, pud); + page_table_check_pud_set(vma->vm_mm, address, pudp, pud); return __pud(atomic_long_xchg((atomic_long_t *)pudp, pud_val(pud))); } =20 diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index e33df3da6980..0603793acb3a 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1220,7 +1220,7 @@ static inline void set_pmd_at(struct mm_struct *mm, u= nsigned long addr, static inline void set_pud_at(struct mm_struct *mm, unsigned long addr, pud_t *pudp, pud_t pud) { - page_table_check_pud_set(mm, pudp, pud); + page_table_check_pud_set(mm, addr, pudp, pud); native_set_pud(pudp, pud); } =20 @@ -1371,7 +1371,7 @@ static inline pmd_t pmdp_establish(struct vm_area_str= uct *vma, static inline pud_t pudp_establish(struct vm_area_struct *vma, unsigned long address, pud_t *pudp, pud_t pud) { - page_table_check_pud_set(vma->vm_mm, pudp, pud); + page_table_check_pud_set(vma->vm_mm, address, pudp, pud); if (IS_ENABLED(CONFIG_SMP)) { return xchg(pudp, pud); } else { diff --git a/include/linux/page_table_check.h b/include/linux/page_table_ch= eck.h index 289620d4aad3..0bf18b884a12 100644 --- a/include/linux/page_table_check.h +++ b/include/linux/page_table_check.h @@ -21,8 +21,8 @@ void __page_table_check_ptes_set(struct mm_struct *mm, pt= e_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_puds_set(struct mm_struct *mm, pud_t *pudp, pud_t = pud, - 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, unsigned long addr, pmd_t pmd); @@ -86,12 +86,12 @@ static inline void page_table_check_pmds_set(struct mm_= struct *mm, } =20 static inline void page_table_check_puds_set(struct mm_struct *mm, - pud_t *pudp, pud_t pud, unsigned int nr) + unsigned long addr, pud_t *pudp, pud_t pud, unsigned int nr) { if (static_branch_likely(&page_table_check_disabled)) return; =20 - __page_table_check_puds_set(mm, pudp, pud, nr); + __page_table_check_puds_set(mm, addr, pudp, pud, nr); } =20 static inline void page_table_check_pte_clear_range(struct mm_struct *mm, @@ -137,7 +137,7 @@ static inline void page_table_check_pmds_set(struct mm_= struct *mm, } =20 static inline void page_table_check_puds_set(struct mm_struct *mm, - pud_t *pudp, pud_t pud, unsigned int nr) + unsigned long addr, pud_t *pudp, pud_t pud, unsigned int nr) { } =20 @@ -150,6 +150,6 @@ static inline void page_table_check_pte_clear_range(str= uct mm_struct *mm, #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_pud_set(mm, pudp, pud) page_table_check_puds_set(= mm, pudp, pud, 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 4eeca782b888..3c39e4375886 100644 --- a/mm/page_table_check.c +++ b/mm/page_table_check.c @@ -236,8 +236,8 @@ void __page_table_check_pmds_set(struct mm_struct *mm, = pmd_t *pmdp, pmd_t pmd, } EXPORT_SYMBOL(__page_table_check_pmds_set); =20 -void __page_table_check_puds_set(struct mm_struct *mm, pud_t *pudp, pud_t = pud, - 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) { unsigned long stride =3D PUD_SIZE >> PAGE_SHIFT; unsigned int i; --=20 2.50.1