From patchwork Thu Sep 2 21:52:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12472737 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01108C433EF for ; Thu, 2 Sep 2021 21:52:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A8E4C60E8B for ; Thu, 2 Sep 2021 21:52:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A8E4C60E8B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 4F9596B0085; Thu, 2 Sep 2021 17:52:47 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4A8918D0001; Thu, 2 Sep 2021 17:52:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3706C6B0092; Thu, 2 Sep 2021 17:52:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0091.hostedemail.com [216.40.44.91]) by kanga.kvack.org (Postfix) with ESMTP id 27CB86B0085 for ; Thu, 2 Sep 2021 17:52:47 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id E093D2C6A5 for ; Thu, 2 Sep 2021 21:52:46 +0000 (UTC) X-FDA: 78543983532.12.41B2551 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf27.hostedemail.com (Postfix) with ESMTP id 88A26700009D for ; Thu, 2 Sep 2021 21:52:46 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 68A9B60724; Thu, 2 Sep 2021 21:52:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1630619565; bh=qX/6USi2CHfe04MysNWeDNwOkUrXKQz0PbVQalZ5I+U=; h=Date:From:To:Subject:In-Reply-To:From; b=ne9W2R9pcy2h83ZwmqBINEUL5qQARtOd3blqMy609MjDHNjbPbsoaXeLToBrOztL4 q8WRywSdQvzYpMPXEt2jnvxx+bM2m6kUbTqsxh9kRT31nK6s5En9d7jP62Jz78ykMc oPCHmLyihGpMJwOEj2YZc4CyprSMm+OPWPaChINQ= Date: Thu, 02 Sep 2021 14:52:45 -0700 From: Andrew Morton To: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.com, cai@lca.pw, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, chuhu@redhat.com, gerald.schaefer@linux.ibm.com, gshan@redhat.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, vgupta@synopsys.com, will@kernel.org Subject: [patch 052/212] mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests Message-ID: <20210902215245.EBN-DnQx8%akpm@linux-foundation.org> In-Reply-To: <20210902144820.78957dff93d7bea620d55a89@linux-foundation.org> User-Agent: s-nail v14.8.16 Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=ne9W2R9p; spf=pass (imf27.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-Stat-Signature: swkdgmb13mcprxn3qmaq7g49shoyqp1i X-Rspamd-Queue-Id: 88A26700009D X-Rspamd-Server: rspam04 X-HE-Tag: 1630619566-588296 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: From: Gavin Shan Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests This uses struct pgtable_debug_args in PUD modifying tests. The allocated huge page is used when set_pud_at() is used. The corresponding tests are skipped if the huge page doesn't exist. Besides, the following unused variables in debug_vm_pgtable() are dropped: @prot, @paddr, @pud_aligned. Link: https://lkml.kernel.org/r/20210809092631.1888748-10-gshan@redhat.com Signed-off-by: Gavin Shan Reviewed-by: Anshuman Khandual Tested-by: Christophe Leroy [powerpc 8xx] Tested-by: Gerald Schaefer [s390] Cc: Aneesh Kumar K.V Cc: Catalin Marinas Cc: Chunyu Hu Cc: Qian Cai Cc: Vineet Gupta Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/debug_vm_pgtable.c | 126 +++++++++++++++------------------------- 1 file changed, 48 insertions(+), 78 deletions(-) --- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests +++ a/mm/debug_vm_pgtable.c @@ -337,55 +337,56 @@ static void __init pud_basic_tests(struc WARN_ON(!pud_bad(pud_mkhuge(pud))); } -static void __init pud_advanced_tests(struct mm_struct *mm, - struct vm_area_struct *vma, pud_t *pudp, - unsigned long pfn, unsigned long vaddr, - pgprot_t prot) +static void __init pud_advanced_tests(struct pgtable_debug_args *args) { + unsigned long vaddr = args->vaddr; pud_t pud; if (!has_transparent_hugepage()) return; + if (args->pud_pfn == ULONG_MAX) + return; + pr_debug("Validating PUD advanced\n"); /* Align the address wrt HPAGE_PUD_SIZE */ vaddr &= HPAGE_PUD_MASK; - pud = pfn_pud(pfn, prot); - set_pud_at(mm, vaddr, pudp, pud); - pudp_set_wrprotect(mm, vaddr, pudp); - pud = READ_ONCE(*pudp); + pud = pfn_pud(args->pud_pfn, args->page_prot); + set_pud_at(args->mm, vaddr, args->pudp, pud); + pudp_set_wrprotect(args->mm, vaddr, args->pudp); + pud = READ_ONCE(*args->pudp); WARN_ON(pud_write(pud)); #ifndef __PAGETABLE_PMD_FOLDED - pudp_huge_get_and_clear(mm, vaddr, pudp); - pud = READ_ONCE(*pudp); + pudp_huge_get_and_clear(args->mm, vaddr, args->pudp); + pud = READ_ONCE(*args->pudp); WARN_ON(!pud_none(pud)); #endif /* __PAGETABLE_PMD_FOLDED */ - pud = pfn_pud(pfn, prot); + pud = pfn_pud(args->pud_pfn, args->page_prot); pud = pud_wrprotect(pud); pud = pud_mkclean(pud); - set_pud_at(mm, vaddr, pudp, pud); + set_pud_at(args->mm, vaddr, args->pudp, pud); pud = pud_mkwrite(pud); pud = pud_mkdirty(pud); - pudp_set_access_flags(vma, vaddr, pudp, pud, 1); - pud = READ_ONCE(*pudp); + pudp_set_access_flags(args->vma, vaddr, args->pudp, pud, 1); + pud = READ_ONCE(*args->pudp); WARN_ON(!(pud_write(pud) && pud_dirty(pud))); #ifndef __PAGETABLE_PMD_FOLDED - pudp_huge_get_and_clear_full(mm, vaddr, pudp, 1); - pud = READ_ONCE(*pudp); + pudp_huge_get_and_clear_full(args->mm, vaddr, args->pudp, 1); + pud = READ_ONCE(*args->pudp); WARN_ON(!pud_none(pud)); #endif /* __PAGETABLE_PMD_FOLDED */ - pud = pfn_pud(pfn, prot); + pud = pfn_pud(args->pud_pfn, args->page_prot); pud = pud_mkyoung(pud); - set_pud_at(mm, vaddr, pudp, pud); - pudp_test_and_clear_young(vma, vaddr, pudp); - pud = READ_ONCE(*pudp); + set_pud_at(args->mm, vaddr, args->pudp, pud); + pudp_test_and_clear_young(args->vma, vaddr, args->pudp); + pud = READ_ONCE(*args->pudp); WARN_ON(pud_young(pud)); - pudp_huge_get_and_clear(mm, vaddr, pudp); + pudp_huge_get_and_clear(args->mm, vaddr, args->pudp); } static void __init pud_leaf_tests(struct pgtable_debug_args *args) @@ -405,24 +406,14 @@ static void __init pud_leaf_tests(struct } #else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx) { } -static void __init pud_advanced_tests(struct mm_struct *mm, - struct vm_area_struct *vma, pud_t *pudp, - unsigned long pfn, unsigned long vaddr, - pgprot_t prot) -{ -} +static void __init pud_advanced_tests(struct pgtable_debug_args *args) { } static void __init pud_leaf_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ #else /* !CONFIG_TRANSPARENT_HUGEPAGE */ static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx) { } static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx) { } static void __init pmd_advanced_tests(struct pgtable_debug_args *args) { } -static void __init pud_advanced_tests(struct mm_struct *mm, - struct vm_area_struct *vma, pud_t *pudp, - unsigned long pfn, unsigned long vaddr, - pgprot_t prot) -{ -} +static void __init pud_advanced_tests(struct pgtable_debug_args *args) { } static void __init pmd_leaf_tests(struct pgtable_debug_args *args) { } static void __init pud_leaf_tests(struct pgtable_debug_args *args) { } static void __init pmd_savedwrite_tests(struct pgtable_debug_args *args) { } @@ -448,11 +439,11 @@ static void __init pmd_huge_tests(struct WARN_ON(!pmd_none(pmd)); } -static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot) +static void __init pud_huge_tests(struct pgtable_debug_args *args) { pud_t pud; - if (!arch_vmap_pud_supported(prot)) + if (!arch_vmap_pud_supported(args->page_prot)) return; pr_debug("Validating PUD huge\n"); @@ -460,15 +451,15 @@ static void __init pud_huge_tests(pud_t * X86 defined pud_set_huge() verifies that the given * PUD is not a populated non-leaf entry. */ - WRITE_ONCE(*pudp, __pud(0)); - WARN_ON(!pud_set_huge(pudp, __pfn_to_phys(pfn), prot)); - WARN_ON(!pud_clear_huge(pudp)); - pud = READ_ONCE(*pudp); + WRITE_ONCE(*args->pudp, __pud(0)); + WARN_ON(!pud_set_huge(args->pudp, __pfn_to_phys(args->fixed_pud_pfn), args->page_prot)); + WARN_ON(!pud_clear_huge(args->pudp)); + pud = READ_ONCE(*args->pudp); WARN_ON(!pud_none(pud)); } #else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */ static void __init pmd_huge_tests(struct pgtable_debug_args *args) { } -static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot) { } +static void __init pud_huge_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ static void __init p4d_basic_tests(struct pgtable_debug_args *args) @@ -490,27 +481,26 @@ static void __init pgd_basic_tests(struc } #ifndef __PAGETABLE_PUD_FOLDED -static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp) +static void __init pud_clear_tests(struct pgtable_debug_args *args) { - pud_t pud = READ_ONCE(*pudp); + pud_t pud = READ_ONCE(*args->pudp); - if (mm_pmd_folded(mm)) + if (mm_pmd_folded(args->mm)) return; pr_debug("Validating PUD clear\n"); pud = __pud(pud_val(pud) | RANDOM_ORVALUE); - WRITE_ONCE(*pudp, pud); - pud_clear(pudp); - pud = READ_ONCE(*pudp); + WRITE_ONCE(*args->pudp, pud); + pud_clear(args->pudp); + pud = READ_ONCE(*args->pudp); WARN_ON(!pud_none(pud)); } -static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp, - pmd_t *pmdp) +static void __init pud_populate_tests(struct pgtable_debug_args *args) { pud_t pud; - if (mm_pmd_folded(mm)) + if (mm_pmd_folded(args->mm)) return; pr_debug("Validating PUD populate\n"); @@ -518,16 +508,13 @@ static void __init pud_populate_tests(st * This entry points to next level page table page. * Hence this must not qualify as pud_bad(). */ - pud_populate(mm, pudp, pmdp); - pud = READ_ONCE(*pudp); + pud_populate(args->mm, args->pudp, args->start_pmdp); + pud = READ_ONCE(*args->pudp); WARN_ON(pud_bad(pud)); } #else /* !__PAGETABLE_PUD_FOLDED */ -static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp) { } -static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp, - pmd_t *pmdp) -{ -} +static void __init pud_clear_tests(struct pgtable_debug_args *args) { } +static void __init pud_populate_tests(struct pgtable_debug_args *args) { } #endif /* PAGETABLE_PUD_FOLDED */ #ifndef __PAGETABLE_P4D_FOLDED @@ -1217,10 +1204,7 @@ static int __init debug_vm_pgtable(void) pud_t *pudp, *saved_pudp; pmd_t *pmdp, *saved_pmdp, pmd; pgtable_t saved_ptep; - pgprot_t prot; - phys_addr_t paddr; unsigned long vaddr; - unsigned long pud_aligned; spinlock_t *ptl = NULL; int idx, ret; @@ -1229,7 +1213,6 @@ static int __init debug_vm_pgtable(void) if (ret) return ret; - prot = vm_get_page_prot(VMFLAGS); vaddr = get_random_vaddr(); mm = mm_alloc(); if (!mm) { @@ -1243,19 +1226,6 @@ static int __init debug_vm_pgtable(void) return 1; } - /* - * PFN for mapping at PTE level is determined from a standard kernel - * text symbol. But pfns for higher page table levels are derived by - * masking lower bits of this real pfn. These derived pfns might not - * exist on the platform but that does not really matter as pfn_pxx() - * helpers will still create appropriate entries for the test. This - * helps avoid large memory block allocations to be used for mapping - * at higher page table levels. - */ - paddr = __pa_symbol(&start_kernel); - - pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT; - pgdp = pgd_offset(mm, vaddr); p4dp = p4d_alloc(mm, pgdp, vaddr); pudp = pud_alloc(mm, p4dp, vaddr); @@ -1348,11 +1318,11 @@ static int __init debug_vm_pgtable(void) pmd_populate_tests(&args); spin_unlock(ptl); - ptl = pud_lock(mm, pudp); - pud_clear_tests(mm, pudp); - pud_advanced_tests(mm, vma, pudp, pud_aligned, vaddr, prot); - pud_huge_tests(pudp, pud_aligned, prot); - pud_populate_tests(mm, pudp, saved_pmdp); + ptl = pud_lock(args.mm, args.pudp); + pud_clear_tests(&args); + pud_advanced_tests(&args); + pud_huge_tests(&args); + pud_populate_tests(&args); spin_unlock(ptl); spin_lock(&mm->page_table_lock);