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 B8775C32772 for ; Tue, 23 Aug 2022 13:17:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 16AEE6B0073; Tue, 23 Aug 2022 09:17:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 11B3F8D0002; Tue, 23 Aug 2022 09:17:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F24DF8D0001; Tue, 23 Aug 2022 09:17:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id E2EF96B0073 for ; Tue, 23 Aug 2022 09:17:08 -0400 (EDT) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 74F5B80B82 for ; Tue, 23 Aug 2022 13:17:08 +0000 (UTC) X-FDA: 79830908136.22.2518E83 Received: from mail-yw1-f171.google.com (mail-yw1-f171.google.com [209.85.128.171]) by imf20.hostedemail.com (Postfix) with ESMTP id 2BF521C0022 for ; Tue, 23 Aug 2022 13:17:08 +0000 (UTC) Received: by mail-yw1-f171.google.com with SMTP id 00721157ae682-33387bf0c4aso377466477b3.11 for ; Tue, 23 Aug 2022 06:17:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc; bh=FTs5W/CsbRtqh/vi77RbH8WiK86F7dlns571CuGae0w=; b=QlDaspLdb9+BWzybPcHwBLL62/TeGED5WKU1iAfY060Z02rugnl0yYuoUiFi0uDWZz a5tl+tfml+dBuLz+bTRTjh8ZjhYHEXvxi++9nA1WMW/rfGMspc9BHS3Eu8je4DUWxT08 60NB0UaEPc1ie28UKA+5DDT0e9usEzoCxIz/C1Ime/bm4Gnd09grip2rRXWasIztFePk irEvlW1PvBq1wfJq60mnGiPh17QcGMW8ngi1/LuyiqgUKU8SoC3yyWOFOIedD62HPNba vnX5r/YN2pN/FQ5XxFckcfvyt5KlvNaAvwh55jDN0jRihBR1jvBQWx/TuHbuz9LwmZ6V YKNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc; bh=FTs5W/CsbRtqh/vi77RbH8WiK86F7dlns571CuGae0w=; b=u71EMmXvZV9s6c0FgiLG2oHnRi2lOyaLqLWAlrmOkadzQvfcC0jIuzKaCb4VcooNyF rvEkKgYb+sKvU1n1RXkwv184/fuzrWYcxYpbLxDjAmRX33USmht/Yc+fqqHpQQ4TPS26 CVH1kHoSDoQu+duvKWQPvfNrXDIikmf3OREMrPh5OE6cq1ySsDHw3e0oIzlu7HkETF0Q 8krjl5Sg04G5Hq8NeMByBHZID0ox0RwMEk5oF5CclOqt67X/uQpwCkEX1fWYf1zgpUwD UQNL39g0CPmHiIZzuAe14pXZ+mgILVuTSfsQ6uAFCkAmn5j0votE5XmCzSkCfG3SP/83 xudw== X-Gm-Message-State: ACgBeo1i6bUiPOAdkw+U44aIwDi35vC4wbHZFI4elpnfoh25ASLakztc QeJ+D27qDFLMukpM9aKujq1qIkJndAzs/VjFBZT+/g== X-Google-Smtp-Source: AA6agR56wu7Il9bBNGqKJMHGme0hQw//Mh3YW9l/6XS4CTlFOhieFb23Gk/f2IzAAspaApiM8T9wR22GEypFP/lfYKs= X-Received: by 2002:a0d:cc0f:0:b0:334:c52e:83c4 with SMTP id o15-20020a0dcc0f000000b00334c52e83c4mr24731437ywd.324.1661260627245; Tue, 23 Aug 2022 06:17:07 -0700 (PDT) MIME-Version: 1.0 References: <20220815041803.17954-1-kirill.shutemov@linux.intel.com> <20220815041803.17954-7-kirill.shutemov@linux.intel.com> In-Reply-To: From: Alexander Potapenko Date: Tue, 23 Aug 2022 15:16:30 +0200 Message-ID: Subject: Re: [PATCHv6 06/11] x86/mm: Provide arch_prctl() interface for LAM To: "Kirill A. Shutemov" Cc: Dave Hansen , Andy Lutomirski , Peter Zijlstra , "the arch/x86 maintainers" , Kostya Serebryany , Andrey Ryabinin , Andrey Konovalov , Taras Madan , Dmitry Vyukov , "H . J . Lu" , Andi Kleen , Rick Edgecombe , Linux Memory Management List , LKML Content-Type: text/plain; charset="UTF-8" ARC-Authentication-Results: i=1; imf20.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=QlDaspLd; spf=pass (imf20.hostedemail.com: domain of glider@google.com designates 209.85.128.171 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (policy=reject) header.from=google.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661260628; a=rsa-sha256; cv=none; b=lXgFX6sYfOIRQyZK+QkhLMWi7at4dvkUJ0ImoCS5HnuZDJfzF5koa50aJSrsq8fzYPseeA Uqi7FxD/NxK811wXER77vOogznxGumQgzOxt8o3lZagsBKBDydkU88C0yl0k0hQszVR4VF NTMOcpgvnBkBhjknnfJdljEqOYwhaZs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661260628; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=FTs5W/CsbRtqh/vi77RbH8WiK86F7dlns571CuGae0w=; b=ZrpwatmLWs3E2XCz4wKEu4O4NmpbMMw/IiyhV/8/S3RabFDCem3qXkAnmOddxn5UW/g+LP 9MUYy97+7pp6ZtPq3qM4pZtyhFpvHCOb3TXTZ2NsuV2bp0u/D7d+uIrvskaaTnw33Aprsg Jf5JEjlnsa5fEGJ6pq1bYS0lHE00P04= X-Stat-Signature: 4pxmnht88e8ntcq3ee1beau6rzfmes67 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 2BF521C0022 Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=QlDaspLd; spf=pass (imf20.hostedemail.com: domain of glider@google.com designates 209.85.128.171 as permitted sender) smtp.mailfrom=glider@google.com; dmarc=pass (policy=reject) header.from=google.com X-HE-Tag: 1661260628-736255 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, Aug 22, 2022 at 11:32 AM Alexander Potapenko wrote: > > On Mon, Aug 15, 2022 at 6:15 AM Kirill A. Shutemov > wrote: > > > > Add a couple of arch_prctl() handles: > > > > - ARCH_ENABLE_TAGGED_ADDR enabled LAM. The argument is required number > > of tag bits. It is rounded up to the nearest LAM mode that can > > provide it. For now only LAM_U57 is supported, with 6 tag bits. > > > > - ARCH_GET_UNTAG_MASK returns untag mask. It can indicates where tag > > bits located in the address. > > > > - ARCH_GET_MAX_TAG_BITS returns the maximum tag bits user can request. > > Zero if LAM is not supported. > > > > Signed-off-by: Kirill A. Shutemov > Reviewed-by: Alexander Potapenko And also: Tested-by: Alexander Potapenko