From mboxrd@z Thu Jan 1 00:00:00 1970 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 6F5DDC52D7F for ; Fri, 9 Aug 2024 16:34:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 113726B00A3; Fri, 9 Aug 2024 12:34:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 09CB46B00A9; Fri, 9 Aug 2024 12:34:30 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E31746B00AC; Fri, 9 Aug 2024 12:34:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id C2FFF6B00A3 for ; Fri, 9 Aug 2024 12:34:29 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id AA904A132B for ; Fri, 9 Aug 2024 16:34:26 +0000 (UTC) X-FDA: 82433254932.11.268149E Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf12.hostedemail.com (Postfix) with ESMTP id 5219340011 for ; Fri, 9 Aug 2024 16:34:24 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=EpVHX9C8; dmarc=pass (policy=none) header.from=redhat.com; spf=pass (imf12.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1723221210; a=rsa-sha256; cv=none; b=MRH55TEsStEiK05K5kqIOGViGwZ3JPL8gFQoN3FPtGDKMORwFUjeBOTAXNU3nf/bYYY5O2 Uptlij4V1f6Mm7zUIOnPtu2xg1xRLIM0rogdHPx5wZFAvBGu/atnsI2WmEehFM6Wg0cpgP BfIpdnJUTn1yCX6y4ma8f8FJlqx5ze0= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=EpVHX9C8; dmarc=pass (policy=none) header.from=redhat.com; spf=pass (imf12.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1723221210; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=QoLkUdckrqDJnReUgsCkNDRsr8qBkab668j70DQFRt8=; b=RBQT3x81ArZr9vtH7AhyAC4v/RrN4sexZdaZTonDsaoEJERTq1ev0CKuVQQ6t9ts0Hxv3l VkXVGbsQy/tzvVH/MbPj8i9VYMmkaKcl2dFha7H7Ng6ie9Q2p1ayYMFCkPyP6u5rNFjEA3 VPp3meq6JGgleoInv710TFB3BsBgVB0= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1723221263; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=QoLkUdckrqDJnReUgsCkNDRsr8qBkab668j70DQFRt8=; b=EpVHX9C8joTjgQlJ/uo0KXsmkKUY9chpQilOE/iZZeWh9vs26x7/xYcph7ugajJiJqG3M1 Zorl8uVYz9c7DB7sZjYBuuP1W6aeWyPMWi2hCC2AxvV4pw4oM6AdDHYTeILIBbgqmaEsW5 /wj/8WOsixOJehvlawQl8vY0teST9yk= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-447-LntzzzDSMbOMfjyc__jXsA-1; Fri, 09 Aug 2024 12:34:20 -0400 X-MC-Unique: LntzzzDSMbOMfjyc__jXsA-1 Received: by mail-wr1-f69.google.com with SMTP id ffacd0b85a97d-3685a5a765fso1288779f8f.1 for ; Fri, 09 Aug 2024 09:34:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723221259; x=1723826059; h=content-transfer-encoding:in-reply-to:organization:autocrypt :content-language:from:references:cc:to:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=QoLkUdckrqDJnReUgsCkNDRsr8qBkab668j70DQFRt8=; b=YMRvN4O5XZraEf8E4SHjX4SkIlSgY6gXyv4VMtUdb1aT0UsXzeZVWT1RVwQ4b/aqoQ 3sDEsH/UKYqHHrZ+Xkvd+ubuRwSV7YXWW8p7gQQg1gMgYRBSNyG5474Q3WHIuoSmU79o ltNe5S6ol6+am9/0KX6zb1EX4EWHImqHE9NnCbcNztjTZWXfpANA734lfopzVxhVuYGv PQtggwv37m1Q7cgLVQombkvh+lIYW3wD8SlKwJ5D32S01Fa94Rk1zjwHfSGdcO7tbSka RnpEgj1CQsGkKmV6nu3XFtL/NbD4jbNsFh776g5Dfua1Z5dHWqJh5NYpZ1T3dL21IxyW AodQ== X-Forwarded-Encrypted: i=1; AJvYcCXh1vbihNCNYnvZ9qnLRUlUMxNsCxl0qUCsoCyFaniw3gxwihM6DDRBXpIjnIzQ1pv5OKZT/9cEDikHD46MFnqO2Y8= X-Gm-Message-State: AOJu0Yy7877w1PLtjIcjHJLCDyQYhOZ8Of1rwEPiIhCbZfkXK4TmEf8F UZVSkTVeLRKmS4D/DqOwy5v2UWLmPDMfPgAIFh73NIqmVawKVRP4fdNKaib0DmaXsGPfog7ONmR W8UvUeuereI/32IEIBfR1aOLIvCl+0Wu2kskPc0aASu+TYmcp X-Received: by 2002:a5d:4562:0:b0:368:6337:4226 with SMTP id ffacd0b85a97d-36d5f2d0fb8mr1301917f8f.12.1723221258920; Fri, 09 Aug 2024 09:34:18 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEKEHvLNa26hrAuQu6rK0KsK/wvnm2hOgARvrEzXVL69guW1PypXgOcEiRLWHXpxy4NovBYuQ== X-Received: by 2002:a5d:4562:0:b0:368:6337:4226 with SMTP id ffacd0b85a97d-36d5f2d0fb8mr1301886f8f.12.1723221258392; Fri, 09 Aug 2024 09:34:18 -0700 (PDT) Received: from ?IPV6:2003:d8:2f09:3f00:d228:bd67:7baa:d604? (p200300d82f093f00d228bd677baad604.dip0.t-ipconnect.de. [2003:d8:2f09:3f00:d228:bd67:7baa:d604]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-36d2718a4a6sm5756184f8f.58.2024.08.09.09.34.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 09 Aug 2024 09:34:17 -0700 (PDT) Message-ID: Date: Fri, 9 Aug 2024 18:34:15 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/19] mm: Introduce ARCH_SUPPORTS_HUGE_PFNMAP and special bits to pmd/pud To: Peter Xu , linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Sean Christopherson , Oscar Salvador , Jason Gunthorpe , Axel Rasmussen , linux-arm-kernel@lists.infradead.org, x86@kernel.org, Will Deacon , Gavin Shan , Paolo Bonzini , Zi Yan , Andrew Morton , Catalin Marinas , Ingo Molnar , Alistair Popple , Borislav Petkov , Thomas Gleixner , kvm@vger.kernel.org, Dave Hansen , Alex Williamson , Yan Zhao References: <20240809160909.1023470-1-peterx@redhat.com> <20240809160909.1023470-2-peterx@redhat.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20240809160909.1023470-2-peterx@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 5219340011 X-Stat-Signature: subecsq7w11iwkgyudrm4ojr18i6aq5i X-Rspam-User: X-HE-Tag: 1723221263-100908 X-HE-Meta: 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 6MvQXtWm lhVksx9sZKhdCWuE0kz6UekflhXogbmO2+ltP5u2cop/fPsmWfAqi7YTTDOyrcYMJIaBN2WwXAXAq6Y01YOpupdSYbNcovBRm6JXQWEqrmOK0ZLjV+GiHpBQx2cBwU1OEDNbEZQzR79T0WX9CKCpEY+Z7ni13yype5+Ry7S8hQKD+kG0bayG7oTbeZir/9tgKFDMLKvFsM5gNvO1bjPDGGWh7DkIx5g6QoWwPBXud2RX8fGLnRR6r5A13tno7XQyfJRDFwIn1D9kg+rCGWck+wkofxcwZa9yFRGZltx/BHxAyPhM7t/fMNLvlt8wO0KblC57ccgQdsLh591xx3nUFJj2cvawWla9os727o4oHy3VvHJSLovzWzJs3iaFDr7arnUQ44raXtY+cftU6Gl21aOfTDg== 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: List-Subscribe: List-Unsubscribe: On 09.08.24 18:08, Peter Xu wrote: > This patch introduces the option to introduce special pte bit into > pmd/puds. Archs can start to define pmd_special / pud_special when > supported by selecting the new option. Per-arch support will be added > later. > > Before that, create fallbacks for these helpers so that they are always > available. > > Signed-off-by: Peter Xu > --- > include/linux/mm.h | 24 ++++++++++++++++++++++++ > mm/Kconfig | 13 +++++++++++++ > 2 files changed, 37 insertions(+) > > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 43b40334e9b2..90ca84200800 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -2644,6 +2644,30 @@ static inline pte_t pte_mkspecial(pte_t pte) > } > #endif > > +#ifndef CONFIG_ARCH_SUPPORTS_PMD_PFNMAP > +static inline bool pmd_special(pmd_t pmd) > +{ > + return false; > +} > + > +static inline pmd_t pmd_mkspecial(pmd_t pmd) > +{ > + return pmd; > +} > +#endif /* CONFIG_ARCH_SUPPORTS_PMD_PFNMAP */ > + > +#ifndef CONFIG_ARCH_SUPPORTS_PUD_PFNMAP > +static inline bool pud_special(pud_t pud) > +{ > + return false; > +} > + > +static inline pud_t pud_mkspecial(pud_t pud) > +{ > + return pud; > +} > +#endif /* CONFIG_ARCH_SUPPORTS_PUD_PFNMAP */ > + > #ifndef CONFIG_ARCH_HAS_PTE_DEVMAP > static inline int pte_devmap(pte_t pte) > { > diff --git a/mm/Kconfig b/mm/Kconfig > index 3936fe4d26d9..3db0eebb53e2 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -881,6 +881,19 @@ endif # TRANSPARENT_HUGEPAGE > config PGTABLE_HAS_HUGE_LEAVES > def_bool TRANSPARENT_HUGEPAGE || HUGETLB_PAGE > > +# TODO: Allow to be enabled without THP > +config ARCH_SUPPORTS_HUGE_PFNMAP > + def_bool n > + depends on TRANSPARENT_HUGEPAGE > + > +config ARCH_SUPPORTS_PMD_PFNMAP > + def_bool y > + depends on ARCH_SUPPORTS_HUGE_PFNMAP && HAVE_ARCH_TRANSPARENT_HUGEPAGE > + > +config ARCH_SUPPORTS_PUD_PFNMAP > + def_bool y > + depends on ARCH_SUPPORTS_HUGE_PFNMAP && HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD > + > # > # UP and nommu archs use km based percpu allocator > # As noted in reply to other patches, I think you have to take care of vm_normal_page_pmd() [if not done in another patch I am missing] and likely you want to introduce vm_normal_page_pud(). -- Cheers, David / dhildenb