From patchwork Tue Mar 29 16:43:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 12795081 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 576C0C43217 for ; Tue, 29 Mar 2022 16:46:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DA3C38D0003; Tue, 29 Mar 2022 12:46:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D52FC8D0001; Tue, 29 Mar 2022 12:46:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BCD068D0003; Tue, 29 Mar 2022 12:46:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0065.hostedemail.com [216.40.44.65]) by kanga.kvack.org (Postfix) with ESMTP id ADC0C8D0001 for ; Tue, 29 Mar 2022 12:46:42 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 67D95181953F1 for ; Tue, 29 Mar 2022 16:46:42 +0000 (UTC) X-FDA: 79298002644.17.0744FAF Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf14.hostedemail.com (Postfix) with ESMTP id EB59210000C for ; Tue, 29 Mar 2022 16:46:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1648572401; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jc+cEdEl7LGBIs1sXVyEIKh1m/fhthwqXZBcWFtK9j4=; b=BxSCI/sLj8Zcy++Rtx9dr+kFDHuVhVNDGBLbYtBNz6UwX0KiTiqXqSlIT8MjXvvbwKDcLn p4zDYnV/egnqZ5+dK+GwYBkkai+sazVsdmWMPYXE7PF7NONXqrAThIP8FOqyVWtKE171tE JV5nvr2DQzYi2UgLG4X+q0dAVw4K9bs= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-178-UimuhVBmOH6cfHeWB8eWKg-1; Tue, 29 Mar 2022 12:46:36 -0400 X-MC-Unique: UimuhVBmOH6cfHeWB8eWKg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 02E0C3C11C82; Tue, 29 Mar 2022 16:46:19 +0000 (UTC) Received: from t480s.redhat.com (unknown [10.39.194.134]) by smtp.corp.redhat.com (Postfix) with ESMTP id 20837112132D; Tue, 29 Mar 2022 16:45:27 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: Andrew Morton , Hugh Dickins , Linus Torvalds , David Rientjes , Shakeel Butt , John Hubbard , Jason Gunthorpe , Mike Kravetz , Mike Rapoport , Yang Shi , "Kirill A . Shutemov" , Matthew Wilcox , Vlastimil Babka , Jann Horn , Michal Hocko , Nadav Amit , Rik van Riel , Roman Gushchin , Andrea Arcangeli , Peter Xu , Donald Dutile , Christoph Hellwig , Oleg Nesterov , Jan Kara , Liang Zhang , Pedro Gomes , Oded Gabbay , Catalin Marinas , Will Deacon , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Gerald Schaefer , linux-mm@kvack.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, David Hildenbrand Subject: [PATCH v2 2/8] mm/debug_vm_pgtable: add tests for __HAVE_ARCH_PTE_SWP_EXCLUSIVE Date: Tue, 29 Mar 2022 18:43:23 +0200 Message-Id: <20220329164329.208407-3-david@redhat.com> In-Reply-To: <20220329164329.208407-1-david@redhat.com> References: <20220329164329.208407-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Stat-Signature: ay1wnfjbece83pqyb1ywfut1cjhpfoxb Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b="BxSCI/sL"; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf14.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: EB59210000C X-HE-Tag: 1648572401-919906 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: Let's test that __HAVE_ARCH_PTE_SWP_EXCLUSIVE works as expected. Signed-off-by: David Hildenbrand Acked-by: Vlastimil Babka --- mm/debug_vm_pgtable.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index db2abd9e415b..55f1a8dc716f 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -837,6 +837,19 @@ static void __init pmd_soft_dirty_tests(struct pgtable_debug_args *args) { } static void __init pmd_swap_soft_dirty_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +static void __init pte_swap_exclusive_tests(struct pgtable_debug_args *args) +{ +#ifdef __HAVE_ARCH_PTE_SWP_EXCLUSIVE + pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot); + + pr_debug("Validating PTE swap exclusive\n"); + pte = pte_swp_mkexclusive(pte); + WARN_ON(!pte_swp_exclusive(pte)); + pte = pte_swp_clear_exclusive(pte); + WARN_ON(pte_swp_exclusive(pte)); +#endif /* __HAVE_ARCH_PTE_SWP_EXCLUSIVE */ +} + static void __init pte_swap_tests(struct pgtable_debug_args *args) { swp_entry_t swp; @@ -1288,6 +1301,8 @@ static int __init debug_vm_pgtable(void) pte_swap_soft_dirty_tests(&args); pmd_swap_soft_dirty_tests(&args); + pte_swap_exclusive_tests(&args); + pte_swap_tests(&args); pmd_swap_tests(&args);