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Mon, 23 Dec 2024 01:45:48 -0800 (PST) From: Qi Zheng To: peterz@infradead.org, agordeev@linux.ibm.com, kevin.brodsky@arm.com, tglx@linutronix.de, david@redhat.com, jannh@google.com, hughd@google.com, yuzhao@google.com, willy@infradead.org, muchun.song@linux.dev, vbabka@kernel.org, lorenzo.stoakes@oracle.com, akpm@linux-foundation.org, rientjes@google.com, vishal.moola@gmail.com, arnd@arndb.de, will@kernel.org, aneesh.kumar@kernel.org, npiggin@gmail.com, dave.hansen@linux.intel.com, rppt@kernel.org, ryan.roberts@arm.com Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-arch@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-um@lists.infradead.org, Qi Zheng Subject: [PATCH v3 13/17] mm: pgtable: introduce generic __tlb_remove_table() Date: Mon, 23 Dec 2024 17:40:59 +0800 Message-Id: X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: References: 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 Content-Type: text/plain; charset="utf-8" Several architectures (arm, arm64, riscv and x86) define exactly the same __tlb_remove_table(), just introduce generic __tlb_remove_table() to eliminate these duplications. The s390 __tlb_remove_table() is nearly the same, so also make s390 __tlb_remove_table() version generic. Signed-off-by: Qi Zheng --- arch/arm/include/asm/tlb.h | 9 --------- arch/arm64/include/asm/tlb.h | 7 ------- arch/powerpc/include/asm/tlb.h | 1 + arch/riscv/include/asm/tlb.h | 12 ------------ arch/s390/include/asm/tlb.h | 9 ++++----- arch/s390/mm/pgalloc.c | 7 ------- arch/sparc/include/asm/tlb_32.h | 1 + arch/sparc/include/asm/tlb_64.h | 1 + arch/x86/include/asm/tlb.h | 17 ----------------- include/asm-generic/tlb.h | 15 +++++++++++++-- 10 files changed, 20 insertions(+), 59 deletions(-) diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h index 264ab635e807a..ea4fbe7b17f6f 100644 --- a/arch/arm/include/asm/tlb.h +++ b/arch/arm/include/asm/tlb.h @@ -27,15 +27,6 @@ #else /* !CONFIG_MMU */ =20 #include - -static inline void __tlb_remove_table(void *_table) -{ - struct ptdesc *ptdesc =3D (struct ptdesc *)_table; - - pagetable_dtor(ptdesc); - pagetable_free(ptdesc); -} - #include =20 static inline void diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h index 93591a80b5bfb..8d762607285cc 100644 --- a/arch/arm64/include/asm/tlb.h +++ b/arch/arm64/include/asm/tlb.h @@ -10,13 +10,6 @@ =20 #include =20 -static inline void __tlb_remove_table(void *_table) -{ - struct ptdesc *ptdesc =3D (struct ptdesc *)_table; - - pagetable_dtor(ptdesc); - pagetable_free(ptdesc); -} =20 #define tlb_flush tlb_flush static void tlb_flush(struct mmu_gather *tlb); diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h index 1ca7d4c4b90db..2058e8d3e0138 100644 --- a/arch/powerpc/include/asm/tlb.h +++ b/arch/powerpc/include/asm/tlb.h @@ -37,6 +37,7 @@ extern void tlb_flush(struct mmu_gather *tlb); */ #define tlb_needs_table_invalidate() radix_enabled() =20 +#define __HAVE_ARCH_TLB_REMOVE_TABLE /* Get the generic bits... */ #include =20 diff --git a/arch/riscv/include/asm/tlb.h b/arch/riscv/include/asm/tlb.h index ded8724b3c4f7..50b63b5c15bd8 100644 --- a/arch/riscv/include/asm/tlb.h +++ b/arch/riscv/include/asm/tlb.h @@ -10,18 +10,6 @@ struct mmu_gather; =20 static void tlb_flush(struct mmu_gather *tlb); =20 -#ifdef CONFIG_MMU - -static inline void __tlb_remove_table(void *table) -{ - struct ptdesc *ptdesc =3D (struct ptdesc *)table; - - pagetable_dtor(ptdesc); - pagetable_free(ptdesc); -} - -#endif /* CONFIG_MMU */ - #define tlb_flush tlb_flush #include =20 diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h index 79df7c0932c56..da4a7d175f69c 100644 --- a/arch/s390/include/asm/tlb.h +++ b/arch/s390/include/asm/tlb.h @@ -22,7 +22,6 @@ * Pages used for the page tables is a different story. FIXME: more */ =20 -void __tlb_remove_table(void *_table); static inline void tlb_flush(struct mmu_gather *tlb); static inline bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, bool delay_rmap, int page_size); @@ -87,7 +86,7 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, p= gtable_t pte, tlb->cleared_pmds =3D 1; if (mm_alloc_pgste(tlb->mm)) gmap_unlink(tlb->mm, (unsigned long *)pte, address); - tlb_remove_ptdesc(tlb, pte); + tlb_remove_ptdesc(tlb, virt_to_ptdesc(pte)); } =20 /* @@ -106,7 +105,7 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb,= pmd_t *pmd, tlb->mm->context.flush_mm =3D 1; tlb->freed_tables =3D 1; tlb->cleared_puds =3D 1; - tlb_remove_ptdesc(tlb, pmd); + tlb_remove_ptdesc(tlb, virt_to_ptdesc(pmd)); } =20 /* @@ -124,7 +123,7 @@ static inline void pud_free_tlb(struct mmu_gather *tlb,= pud_t *pud, tlb->mm->context.flush_mm =3D 1; tlb->freed_tables =3D 1; tlb->cleared_p4ds =3D 1; - tlb_remove_ptdesc(tlb, pud); + tlb_remove_ptdesc(tlb, virt_to_ptdesc(pud)); } =20 /* @@ -142,7 +141,7 @@ static inline void p4d_free_tlb(struct mmu_gather *tlb,= p4d_t *p4d, __tlb_adjust_range(tlb, address, PAGE_SIZE); tlb->mm->context.flush_mm =3D 1; tlb->freed_tables =3D 1; - tlb_remove_ptdesc(tlb, p4d); + tlb_remove_ptdesc(tlb, virt_to_ptdesc(p4d)); } =20 #endif /* _S390_TLB_H */ diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c index c73b89811a264..3e002dea6278f 100644 --- a/arch/s390/mm/pgalloc.c +++ b/arch/s390/mm/pgalloc.c @@ -193,13 +193,6 @@ void page_table_free(struct mm_struct *mm, unsigned lo= ng *table) pagetable_dtor_free(ptdesc); } =20 -void __tlb_remove_table(void *table) -{ - struct ptdesc *ptdesc =3D virt_to_ptdesc(table); - - pagetable_dtor_free(ptdesc); -} - #ifdef CONFIG_TRANSPARENT_HUGEPAGE static void pte_free_now(struct rcu_head *head) { diff --git a/arch/sparc/include/asm/tlb_32.h b/arch/sparc/include/asm/tlb_3= 2.h index 5cd28a8793e39..910254867dfbd 100644 --- a/arch/sparc/include/asm/tlb_32.h +++ b/arch/sparc/include/asm/tlb_32.h @@ -2,6 +2,7 @@ #ifndef _SPARC_TLB_H #define _SPARC_TLB_H =20 +#define __HAVE_ARCH_TLB_REMOVE_TABLE #include =20 #endif /* _SPARC_TLB_H */ diff --git a/arch/sparc/include/asm/tlb_64.h b/arch/sparc/include/asm/tlb_6= 4.h index 3037187482db7..1a6e694418e39 100644 --- a/arch/sparc/include/asm/tlb_64.h +++ b/arch/sparc/include/asm/tlb_64.h @@ -33,6 +33,7 @@ void flush_tlb_pending(void); #define tlb_needs_table_invalidate() (false) #endif =20 +#define __HAVE_ARCH_TLB_REMOVE_TABLE #include =20 #endif /* _SPARC64_TLB_H */ diff --git a/arch/x86/include/asm/tlb.h b/arch/x86/include/asm/tlb.h index f64730be5ad67..3858dbf75880e 100644 --- a/arch/x86/include/asm/tlb.h +++ b/arch/x86/include/asm/tlb.h @@ -20,23 +20,6 @@ static inline void tlb_flush(struct mmu_gather *tlb) flush_tlb_mm_range(tlb->mm, start, end, stride_shift, tlb->freed_tables); } =20 -/* - * While x86 architecture in general requires an IPI to perform TLB - * shootdown, enablement code for several hypervisors overrides - * .flush_tlb_others hook in pv_mmu_ops and implements it by issuing - * a hypercall. To keep software pagetable walkers safe in this case we - * switch to RCU based table free (MMU_GATHER_RCU_TABLE_FREE). See the com= ment - * below 'ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE' in include/asm-generic/t= lb.h - * for more details. - */ -static inline void __tlb_remove_table(void *table) -{ - struct ptdesc *ptdesc =3D (struct ptdesc *)table; - - pagetable_dtor(ptdesc); - pagetable_free(ptdesc); -} - #ifdef CONFIG_PT_RECLAIM static inline void __tlb_remove_table_one_rcu(struct rcu_head *head) { diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h index 709830274b756..69de47c7ef3c5 100644 --- a/include/asm-generic/tlb.h +++ b/include/asm-generic/tlb.h @@ -153,8 +153,9 @@ * * Useful if your architecture has non-page page directories. * - * When used, an architecture is expected to provide __tlb_remove_table() - * which does the actual freeing of these pages. + * When used, an architecture is expected to provide __tlb_remove_table()= or + * use the generic __tlb_remove_table(), which does the actual freeing of= these + * pages. * * MMU_GATHER_RCU_TABLE_FREE * @@ -207,6 +208,16 @@ struct mmu_table_batch { #define MAX_TABLE_BATCH \ ((PAGE_SIZE - sizeof(struct mmu_table_batch)) / sizeof(void *)) =20 +#ifndef __HAVE_ARCH_TLB_REMOVE_TABLE +static inline void __tlb_remove_table(void *table) +{ + struct ptdesc *ptdesc =3D (struct ptdesc *)table; + + pagetable_dtor(ptdesc); + pagetable_free(ptdesc); +} +#endif + extern void tlb_remove_table(struct mmu_gather *tlb, void *table); =20 #else /* !CONFIG_MMU_GATHER_HAVE_TABLE_FREE */ --=20 2.20.1