From patchwork Thu Sep 2 21:52:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12472735 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 E1418C00306 for ; Thu, 2 Sep 2021 21:52:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9107960E8B for ; Thu, 2 Sep 2021 21:52:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9107960E8B 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 39A936B0082; Thu, 2 Sep 2021 17:52:44 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 349186B0085; Thu, 2 Sep 2021 17:52:44 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2118E8D0001; Thu, 2 Sep 2021 17:52:44 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0022.hostedemail.com [216.40.44.22]) by kanga.kvack.org (Postfix) with ESMTP id 0F7786B0082 for ; Thu, 2 Sep 2021 17:52:44 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id BB41024897 for ; Thu, 2 Sep 2021 21:52:43 +0000 (UTC) X-FDA: 78543983406.07.837D88A Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf25.hostedemail.com (Postfix) with ESMTP id 6385DB000182 for ; Thu, 2 Sep 2021 21:52:43 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 34F1161152; Thu, 2 Sep 2021 21:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1630619562; bh=PG9jkB4mmMkLZx2S+ufOk2Xt2r2MKA6Acgqda3OE5sQ=; h=Date:From:To:Subject:In-Reply-To:From; b=ftshbAGGeTiFCSGwdFDzX+jPvwhaVqyXIiZYG+0UGZnlTl4PMdoyzvbxlf6DnGj4t 6hGosW3yba2mA0iE9agr/grgXApxBI/01iPwnFGWj1MUSBWAlEltIfvwbAIm5vyohB i5b+uPtkl6K2TGgBlFPyXeNovc0PnAcU9oWuY2UQ= Date: Thu, 02 Sep 2021 14:52:41 -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 051/212] mm/debug_vm_pgtable: use struct pgtable_debug_args in PMD modifying tests Message-ID: <20210902215241.8RlwvuUPA%akpm@linux-foundation.org> In-Reply-To: <20210902144820.78957dff93d7bea620d55a89@linux-foundation.org> User-Agent: s-nail v14.8.16 Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=ftshbAGG; spf=pass (imf25.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: f3hb1tj5hi9z4wssj6i1rs7q5hw3cqnw X-Rspamd-Queue-Id: 6385DB000182 X-Rspamd-Server: rspam04 X-HE-Tag: 1630619563-74572 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 PMD modifying tests This uses struct pgtable_debug_args in PMD modifying tests. The allocated huge page is used when set_pmd_at() is used. The corresponding tests are skipped if the huge page doesn't exist. Besides, the unused variable @pmd_aligned in debug_vm_pgtable() is dropped. Link: https://lkml.kernel.org/r/20210809092631.1888748-9-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 | 98 ++++++++++++++++++---------------------- 1 file changed, 46 insertions(+), 52 deletions(-) --- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pmd-modifying-tests +++ a/mm/debug_vm_pgtable.c @@ -211,54 +211,55 @@ static void __init pmd_basic_tests(struc WARN_ON(!pmd_bad(pmd_mkhuge(pmd))); } -static void __init pmd_advanced_tests(struct mm_struct *mm, - struct vm_area_struct *vma, pmd_t *pmdp, - unsigned long pfn, unsigned long vaddr, - pgprot_t prot, pgtable_t pgtable) +static void __init pmd_advanced_tests(struct pgtable_debug_args *args) { pmd_t pmd; + unsigned long vaddr = args->vaddr; if (!has_transparent_hugepage()) return; + if (args->pmd_pfn == ULONG_MAX) + return; + pr_debug("Validating PMD advanced\n"); /* Align the address wrt HPAGE_PMD_SIZE */ vaddr &= HPAGE_PMD_MASK; - pgtable_trans_huge_deposit(mm, pmdp, pgtable); + pgtable_trans_huge_deposit(args->mm, args->pmdp, args->start_ptep); - pmd = pfn_pmd(pfn, prot); - set_pmd_at(mm, vaddr, pmdp, pmd); - pmdp_set_wrprotect(mm, vaddr, pmdp); - pmd = READ_ONCE(*pmdp); + pmd = pfn_pmd(args->pmd_pfn, args->page_prot); + set_pmd_at(args->mm, vaddr, args->pmdp, pmd); + pmdp_set_wrprotect(args->mm, vaddr, args->pmdp); + pmd = READ_ONCE(*args->pmdp); WARN_ON(pmd_write(pmd)); - pmdp_huge_get_and_clear(mm, vaddr, pmdp); - pmd = READ_ONCE(*pmdp); + pmdp_huge_get_and_clear(args->mm, vaddr, args->pmdp); + pmd = READ_ONCE(*args->pmdp); WARN_ON(!pmd_none(pmd)); - pmd = pfn_pmd(pfn, prot); + pmd = pfn_pmd(args->pmd_pfn, args->page_prot); pmd = pmd_wrprotect(pmd); pmd = pmd_mkclean(pmd); - set_pmd_at(mm, vaddr, pmdp, pmd); + set_pmd_at(args->mm, vaddr, args->pmdp, pmd); pmd = pmd_mkwrite(pmd); pmd = pmd_mkdirty(pmd); - pmdp_set_access_flags(vma, vaddr, pmdp, pmd, 1); - pmd = READ_ONCE(*pmdp); + pmdp_set_access_flags(args->vma, vaddr, args->pmdp, pmd, 1); + pmd = READ_ONCE(*args->pmdp); WARN_ON(!(pmd_write(pmd) && pmd_dirty(pmd))); - pmdp_huge_get_and_clear_full(vma, vaddr, pmdp, 1); - pmd = READ_ONCE(*pmdp); + pmdp_huge_get_and_clear_full(args->vma, vaddr, args->pmdp, 1); + pmd = READ_ONCE(*args->pmdp); WARN_ON(!pmd_none(pmd)); - pmd = pmd_mkhuge(pfn_pmd(pfn, prot)); + pmd = pmd_mkhuge(pfn_pmd(args->pmd_pfn, args->page_prot)); pmd = pmd_mkyoung(pmd); - set_pmd_at(mm, vaddr, pmdp, pmd); - pmdp_test_and_clear_young(vma, vaddr, pmdp); - pmd = READ_ONCE(*pmdp); + set_pmd_at(args->mm, vaddr, args->pmdp, pmd); + pmdp_test_and_clear_young(args->vma, vaddr, args->pmdp); + pmd = READ_ONCE(*args->pmdp); WARN_ON(pmd_young(pmd)); /* Clear the pte entries */ - pmdp_huge_get_and_clear(mm, vaddr, pmdp); - pgtable = pgtable_trans_huge_withdraw(mm, pmdp); + pmdp_huge_get_and_clear(args->mm, vaddr, args->pmdp); + pgtable_trans_huge_withdraw(args->mm, args->pmdp); } static void __init pmd_leaf_tests(struct pgtable_debug_args *args) @@ -415,12 +416,7 @@ static void __init pud_leaf_tests(struct #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 mm_struct *mm, - struct vm_area_struct *vma, pmd_t *pmdp, - unsigned long pfn, unsigned long vaddr, - pgprot_t prot, pgtable_t pgtable) -{ -} +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, @@ -433,11 +429,11 @@ static void __init pmd_savedwrite_tests( #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP -static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot) +static void __init pmd_huge_tests(struct pgtable_debug_args *args) { pmd_t pmd; - if (!arch_vmap_pmd_supported(prot)) + if (!arch_vmap_pmd_supported(args->page_prot)) return; pr_debug("Validating PMD huge\n"); @@ -445,10 +441,10 @@ static void __init pmd_huge_tests(pmd_t * X86 defined pmd_set_huge() verifies that the given * PMD is not a populated non-leaf entry. */ - WRITE_ONCE(*pmdp, __pmd(0)); - WARN_ON(!pmd_set_huge(pmdp, __pfn_to_phys(pfn), prot)); - WARN_ON(!pmd_clear_huge(pmdp)); - pmd = READ_ONCE(*pmdp); + WRITE_ONCE(*args->pmdp, __pmd(0)); + WARN_ON(!pmd_set_huge(args->pmdp, __pfn_to_phys(args->fixed_pmd_pfn), args->page_prot)); + WARN_ON(!pmd_clear_huge(args->pmdp)); + pmd = READ_ONCE(*args->pmdp); WARN_ON(!pmd_none(pmd)); } @@ -471,7 +467,7 @@ static void __init pud_huge_tests(pud_t WARN_ON(!pud_none(pud)); } #else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */ -static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot) { } +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) { } #endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ @@ -635,20 +631,19 @@ static void __init pte_clear_tests(struc WARN_ON(!pte_none(pte)); } -static void __init pmd_clear_tests(struct mm_struct *mm, pmd_t *pmdp) +static void __init pmd_clear_tests(struct pgtable_debug_args *args) { - pmd_t pmd = READ_ONCE(*pmdp); + pmd_t pmd = READ_ONCE(*args->pmdp); pr_debug("Validating PMD clear\n"); pmd = __pmd(pmd_val(pmd) | RANDOM_ORVALUE); - WRITE_ONCE(*pmdp, pmd); - pmd_clear(pmdp); - pmd = READ_ONCE(*pmdp); + WRITE_ONCE(*args->pmdp, pmd); + pmd_clear(args->pmdp); + pmd = READ_ONCE(*args->pmdp); WARN_ON(!pmd_none(pmd)); } -static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp, - pgtable_t pgtable) +static void __init pmd_populate_tests(struct pgtable_debug_args *args) { pmd_t pmd; @@ -657,8 +652,8 @@ static void __init pmd_populate_tests(st * This entry points to next level page table page. * Hence this must not qualify as pmd_bad(). */ - pmd_populate(mm, pmdp, pgtable); - pmd = READ_ONCE(*pmdp); + pmd_populate(args->mm, args->pmdp, args->start_ptep); + pmd = READ_ONCE(*args->pmdp); WARN_ON(pmd_bad(pmd)); } @@ -1224,7 +1219,7 @@ static int __init debug_vm_pgtable(void) pgtable_t saved_ptep; pgprot_t prot; phys_addr_t paddr; - unsigned long vaddr, pmd_aligned; + unsigned long vaddr; unsigned long pud_aligned; spinlock_t *ptl = NULL; int idx, ret; @@ -1259,7 +1254,6 @@ static int __init debug_vm_pgtable(void) */ paddr = __pa_symbol(&start_kernel); - pmd_aligned = (paddr & PMD_MASK) >> PAGE_SHIFT; pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT; pgdp = pgd_offset(mm, vaddr); @@ -1347,11 +1341,11 @@ static int __init debug_vm_pgtable(void) pte_advanced_tests(&args); pte_unmap_unlock(args.ptep, ptl); - ptl = pmd_lock(mm, pmdp); - pmd_clear_tests(mm, pmdp); - pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot, saved_ptep); - pmd_huge_tests(pmdp, pmd_aligned, prot); - pmd_populate_tests(mm, pmdp, saved_ptep); + ptl = pmd_lock(args.mm, args.pmdp); + pmd_clear_tests(&args); + pmd_advanced_tests(&args); + pmd_huge_tests(&args); + pmd_populate_tests(&args); spin_unlock(ptl); ptl = pud_lock(mm, pudp);