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c=relaxed/simple; d=kernel.org; s=k20201202; t=1686754042; bh=/gZpWG1NklUMCYwhTW6oq7VspsgUlNnjT/+p3rAcQ/o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=igQ6RmLYycdy/LkKPCHWmgLaIprlzKWUM+53uqFbfLRJhevFg+lNjngLkfjX3mZ8R obw/6JwKlVvEQqgRKWXKxzGA2UmAQ0ncG6zqKaNVuKCaIp64O1Hywm1cGdtyt20LQw 89CIp+N0nyC60+/83Fzd1igImKYWSucwgnQcvtsO61sgrZqAYi2S0MCqJCfUk01VBV zHK4olI/Q8rGU9ZLGe0QTYX/A5QaPlEvSuXOjRl+d0dN1GmYoBFWLk2aJfd9679DSj mapYxATdAWcPn2PiwR+awo5BfU6wZVo1vhXzm4OIIT6uvFoBiNJgpsGYofeZb3FQ6j bhhVRxBTM6TAA== Date: Wed, 14 Jun 2023 17:46:43 +0300 From: Mike Rapoport To: "Vishal Moola (Oracle)" Cc: Andrew Morton , Matthew Wilcox , linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.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, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Hugh Dickins , David Hildenbrand , Claudio Imbrenda Subject: Re: [PATCH v4 17/34] s390: Convert various pgalloc functions to use ptdescs Message-ID: <20230614144643.GP52412@kernel.org> References: <20230612210423.18611-1-vishal.moola@gmail.com> <20230612210423.18611-18-vishal.moola@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230612210423.18611-18-vishal.moola@gmail.com> X-Rspamd-Queue-Id: C732540023 X-Rspam-User: X-Stat-Signature: gxa75ck4ktpe613wqus74ksf3ht5s4of X-Rspamd-Server: rspam01 X-HE-Tag: 1686754043-414339 X-HE-Meta: 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 Oa0/rERF 9CO3x2p2wf5R7WkQB+hwQlpZbStDCagdtwnsSpjpbOBo3uN+HTnvu+k92Hzjo/IHoRAIjVmdj2b/HB91vA/MZHLYgjn7VhLSOFaT/1+QknhyvGcO0lkLK/oYAzzS/umUo9DHhfaQeyA5hApQcji/awfqHGJ1AZwafSyQFdb0MLkXaCgKz6rmwdXpq7zsWvgA1PUctttGaJo+JOmQr2PaibD42Vz7kogCJn5OgdBTlliO94Ft6GUYRypajIiJcWw1vJWQ+ZKXHG6h5/vTgc+3G8g8fAKV5w7trJu0P7i555qujdEUfMBUwBKaLR5tfWiy9hqvtPc1dLbXPTSQGlpy9SSO1C/O7adFV6DH+uAsE2OkFhHeDOVVO1D4uUI2ASD3+o9t5RvGFCI3CJrJ2MsMdL9IyPwXwEnqrvMaJeYuTKwgmQlEQFE8f74jLiOZYlRUxBdbq 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: On Mon, Jun 12, 2023 at 02:04:06PM -0700, Vishal Moola (Oracle) wrote: > As part of the conversions to replace pgtable constructor/destructors with > ptdesc equivalents, convert various page table functions to use ptdescs. > > Some of the functions use the *get*page*() helper functions. Convert > these to use pagetable_alloc() and ptdesc_address() instead to help > standardize page tables further. > > Signed-off-by: Vishal Moola (Oracle) Acked-by: Mike Rapoport (IBM) > --- > arch/s390/include/asm/pgalloc.h | 4 +- > arch/s390/include/asm/tlb.h | 4 +- > arch/s390/mm/pgalloc.c | 108 ++++++++++++++++---------------- > 3 files changed, 59 insertions(+), 57 deletions(-) > > diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h > index 17eb618f1348..00ad9b88fda9 100644 > --- a/arch/s390/include/asm/pgalloc.h > +++ b/arch/s390/include/asm/pgalloc.h > @@ -86,7 +86,7 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr) > if (!table) > return NULL; > crst_table_init(table, _SEGMENT_ENTRY_EMPTY); > - if (!pgtable_pmd_page_ctor(virt_to_page(table))) { > + if (!pagetable_pmd_ctor(virt_to_ptdesc(table))) { > crst_table_free(mm, table); > return NULL; > } > @@ -97,7 +97,7 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) > { > if (mm_pmd_folded(mm)) > return; > - pgtable_pmd_page_dtor(virt_to_page(pmd)); > + pagetable_pmd_dtor(virt_to_ptdesc(pmd)); > crst_table_free(mm, (unsigned long *) pmd); > } > > diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h > index b91f4a9b044c..383b1f91442c 100644 > --- a/arch/s390/include/asm/tlb.h > +++ b/arch/s390/include/asm/tlb.h > @@ -89,12 +89,12 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, > { > if (mm_pmd_folded(tlb->mm)) > return; > - pgtable_pmd_page_dtor(virt_to_page(pmd)); > + pagetable_pmd_dtor(virt_to_ptdesc(pmd)); > __tlb_adjust_range(tlb, address, PAGE_SIZE); > tlb->mm->context.flush_mm = 1; > tlb->freed_tables = 1; > tlb->cleared_puds = 1; > - tlb_remove_table(tlb, pmd); > + tlb_remove_ptdesc(tlb, pmd); > } > > /* > diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c > index 6b99932abc66..eeb7c95b98cf 100644 > --- a/arch/s390/mm/pgalloc.c > +++ b/arch/s390/mm/pgalloc.c > @@ -43,17 +43,17 @@ __initcall(page_table_register_sysctl); > > unsigned long *crst_table_alloc(struct mm_struct *mm) > { > - struct page *page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER); > + struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL, CRST_ALLOC_ORDER); > > - if (!page) > + if (!ptdesc) > return NULL; > - arch_set_page_dat(page, CRST_ALLOC_ORDER); > - return (unsigned long *) page_to_virt(page); > + arch_set_page_dat(ptdesc_page(ptdesc), CRST_ALLOC_ORDER); > + return (unsigned long *) ptdesc_to_virt(ptdesc); > } > > void crst_table_free(struct mm_struct *mm, unsigned long *table) > { > - free_pages((unsigned long)table, CRST_ALLOC_ORDER); > + pagetable_free(virt_to_ptdesc(table)); > } > > static void __crst_table_upgrade(void *arg) > @@ -140,21 +140,21 @@ static inline unsigned int atomic_xor_bits(atomic_t *v, unsigned int bits) > > struct page *page_table_alloc_pgste(struct mm_struct *mm) > { > - struct page *page; > + struct ptdesc *ptdesc; > u64 *table; > > - page = alloc_page(GFP_KERNEL); > - if (page) { > - table = (u64 *)page_to_virt(page); > + ptdesc = pagetable_alloc(GFP_KERNEL, 0); > + if (ptdesc) { > + table = (u64 *)ptdesc_to_virt(ptdesc); > memset64(table, _PAGE_INVALID, PTRS_PER_PTE); > memset64(table + PTRS_PER_PTE, 0, PTRS_PER_PTE); > } > - return page; > + return ptdesc_page(ptdesc); > } > > void page_table_free_pgste(struct page *page) > { > - __free_page(page); > + pagetable_free(page_ptdesc(page)); > } > > #endif /* CONFIG_PGSTE */ > @@ -230,7 +230,7 @@ void page_table_free_pgste(struct page *page) > unsigned long *page_table_alloc(struct mm_struct *mm) > { > unsigned long *table; > - struct page *page; > + struct ptdesc *ptdesc; > unsigned int mask, bit; > > /* Try to get a fragment of a 4K page as a 2K page table */ > @@ -238,9 +238,9 @@ unsigned long *page_table_alloc(struct mm_struct *mm) > table = NULL; > spin_lock_bh(&mm->context.lock); > if (!list_empty(&mm->context.pgtable_list)) { > - page = list_first_entry(&mm->context.pgtable_list, > - struct page, lru); > - mask = atomic_read(&page->pt_frag_refcount); > + ptdesc = list_first_entry(&mm->context.pgtable_list, > + struct ptdesc, pt_list); > + mask = atomic_read(&ptdesc->pt_frag_refcount); > /* > * The pending removal bits must also be checked. > * Failure to do so might lead to an impossible > @@ -253,13 +253,13 @@ unsigned long *page_table_alloc(struct mm_struct *mm) > */ > mask = (mask | (mask >> 4)) & 0x03U; > if (mask != 0x03U) { > - table = (unsigned long *) page_to_virt(page); > + table = (unsigned long *) ptdesc_to_virt(ptdesc); > bit = mask & 1; /* =1 -> second 2K */ > if (bit) > table += PTRS_PER_PTE; > - atomic_xor_bits(&page->pt_frag_refcount, > + atomic_xor_bits(&ptdesc->pt_frag_refcount, > 0x01U << bit); > - list_del(&page->lru); > + list_del(&ptdesc->pt_list); > } > } > spin_unlock_bh(&mm->context.lock); > @@ -267,27 +267,27 @@ unsigned long *page_table_alloc(struct mm_struct *mm) > return table; > } > /* Allocate a fresh page */ > - page = alloc_page(GFP_KERNEL); > - if (!page) > + ptdesc = pagetable_alloc(GFP_KERNEL, 0); > + if (!ptdesc) > return NULL; > - if (!pgtable_pte_page_ctor(page)) { > - __free_page(page); > + if (!pagetable_pte_ctor(ptdesc)) { > + pagetable_free(ptdesc); > return NULL; > } > - arch_set_page_dat(page, 0); > + arch_set_page_dat(ptdesc_page(ptdesc), 0); > /* Initialize page table */ > - table = (unsigned long *) page_to_virt(page); > + table = (unsigned long *) ptdesc_to_virt(ptdesc); > if (mm_alloc_pgste(mm)) { > /* Return 4K page table with PGSTEs */ > - atomic_xor_bits(&page->pt_frag_refcount, 0x03U); > + atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x03U); > memset64((u64 *)table, _PAGE_INVALID, PTRS_PER_PTE); > memset64((u64 *)table + PTRS_PER_PTE, 0, PTRS_PER_PTE); > } else { > /* Return the first 2K fragment of the page */ > - atomic_xor_bits(&page->pt_frag_refcount, 0x01U); > + atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x01U); > memset64((u64 *)table, _PAGE_INVALID, 2 * PTRS_PER_PTE); > spin_lock_bh(&mm->context.lock); > - list_add(&page->lru, &mm->context.pgtable_list); > + list_add(&ptdesc->pt_list, &mm->context.pgtable_list); > spin_unlock_bh(&mm->context.lock); > } > return table; > @@ -309,9 +309,8 @@ static void page_table_release_check(struct page *page, void *table, > void page_table_free(struct mm_struct *mm, unsigned long *table) > { > unsigned int mask, bit, half; > - struct page *page; > + struct ptdesc *ptdesc = virt_to_ptdesc(table); > > - page = virt_to_page(table); > if (!mm_alloc_pgste(mm)) { > /* Free 2K page table fragment of a 4K page */ > bit = ((unsigned long) table & ~PAGE_MASK)/(PTRS_PER_PTE*sizeof(pte_t)); > @@ -321,39 +320,38 @@ void page_table_free(struct mm_struct *mm, unsigned long *table) > * will happen outside of the critical section from this > * function or from __tlb_remove_table() > */ > - mask = atomic_xor_bits(&page->pt_frag_refcount, 0x11U << bit); > + mask = atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x11U << bit); > if (mask & 0x03U) > - list_add(&page->lru, &mm->context.pgtable_list); > + list_add(&ptdesc->pt_list, &mm->context.pgtable_list); > else > - list_del(&page->lru); > + list_del(&ptdesc->pt_list); > spin_unlock_bh(&mm->context.lock); > - mask = atomic_xor_bits(&page->pt_frag_refcount, 0x10U << bit); > + mask = atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x10U << bit); > if (mask != 0x00U) > return; > half = 0x01U << bit; > } else { > half = 0x03U; > - mask = atomic_xor_bits(&page->pt_frag_refcount, 0x03U); > + mask = atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x03U); > } > > - page_table_release_check(page, table, half, mask); > - pgtable_pte_page_dtor(page); > - __free_page(page); > + page_table_release_check(ptdesc_page(ptdesc), table, half, mask); > + pagetable_pte_dtor(ptdesc); > + pagetable_free(ptdesc); > } > > void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table, > unsigned long vmaddr) > { > struct mm_struct *mm; > - struct page *page; > unsigned int bit, mask; > + struct ptdesc *ptdesc = virt_to_ptdesc(table); > > mm = tlb->mm; > - page = virt_to_page(table); > if (mm_alloc_pgste(mm)) { > gmap_unlink(mm, table, vmaddr); > table = (unsigned long *) ((unsigned long)table | 0x03U); > - tlb_remove_table(tlb, table); > + tlb_remove_ptdesc(tlb, table); > return; > } > bit = ((unsigned long) table & ~PAGE_MASK) / (PTRS_PER_PTE*sizeof(pte_t)); > @@ -363,11 +361,11 @@ void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table, > * outside of the critical section from __tlb_remove_table() or from > * page_table_free() > */ > - mask = atomic_xor_bits(&page->pt_frag_refcount, 0x11U << bit); > + mask = atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x11U << bit); > if (mask & 0x03U) > - list_add_tail(&page->lru, &mm->context.pgtable_list); > + list_add_tail(&ptdesc->pt_list, &mm->context.pgtable_list); > else > - list_del(&page->lru); > + list_del(&ptdesc->pt_list); > spin_unlock_bh(&mm->context.lock); > table = (unsigned long *) ((unsigned long) table | (0x01U << bit)); > tlb_remove_table(tlb, table); > @@ -377,7 +375,7 @@ void __tlb_remove_table(void *_table) > { > unsigned int mask = (unsigned long) _table & 0x03U, half = mask; > void *table = (void *)((unsigned long) _table ^ mask); > - struct page *page = virt_to_page(table); > + struct ptdesc *ptdesc = virt_to_ptdesc(table); > > switch (half) { > case 0x00U: /* pmd, pud, or p4d */ > @@ -385,18 +383,18 @@ void __tlb_remove_table(void *_table) > return; > case 0x01U: /* lower 2K of a 4K page table */ > case 0x02U: /* higher 2K of a 4K page table */ > - mask = atomic_xor_bits(&page->pt_frag_refcount, mask << 4); > + mask = atomic_xor_bits(&ptdesc->pt_frag_refcount, mask << 4); > if (mask != 0x00U) > return; > break; > case 0x03U: /* 4K page table with pgstes */ > - mask = atomic_xor_bits(&page->pt_frag_refcount, 0x03U); > + mask = atomic_xor_bits(&ptdesc->pt_frag_refcount, 0x03U); > break; > } > > - page_table_release_check(page, table, half, mask); > - pgtable_pte_page_dtor(page); > - __free_page(page); > + page_table_release_check(ptdesc_page(ptdesc), table, half, mask); > + pagetable_pte_dtor(ptdesc); > + pagetable_free(ptdesc); > } > > /* > @@ -424,16 +422,20 @@ static void base_pgt_free(unsigned long *table) > static unsigned long *base_crst_alloc(unsigned long val) > { > unsigned long *table; > + struct ptdesc *ptdesc; > > - table = (unsigned long *)__get_free_pages(GFP_KERNEL, CRST_ALLOC_ORDER); > - if (table) > - crst_table_init(table, val); > + ptdesc = pagetable_alloc(GFP_KERNEL, CRST_ALLOC_ORDER); > + if (!ptdesc) > + return NULL; > + table = ptdesc_address(ptdesc); > + > + crst_table_init(table, val); > return table; > } > > static void base_crst_free(unsigned long *table) > { > - free_pages((unsigned long)table, CRST_ALLOC_ORDER); > + pagetable_free(virt_to_ptdesc(table)); > } > > #define BASE_ADDR_END_FUNC(NAME, SIZE) \ > -- > 2.40.1 > > -- Sincerely yours, Mike.