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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70642EB64DC for ; Tue, 27 Jun 2023 23:39:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229927AbjF0XjJ (ORCPT ); Tue, 27 Jun 2023 19:39:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229948AbjF0XjI (ORCPT ); Tue, 27 Jun 2023 19:39:08 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 239571FEB for ; Tue, 27 Jun 2023 16:39:06 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id 41be03b00d2f7-544c0d768b9so4084228a12.0 for ; Tue, 27 Jun 2023 16:39:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1687909145; x=1690501145; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=UEotHXGDYPp+N3kzq40A+VGZCyOFKrHwBcgbYar1LOg=; b=eYlkZ7RRnjfcOrSEl/RtfXtVIUDXY/SobZ+VOu+z+XZHDsoEHatYx90/aUQor4mUER wxITd49Kw7XvhgcVFYoq4mFZHL7z9aHi0r+QhYL+g6lSIMWRwtUnRedNFC3xOasfMCGu NMW3alJ7N94ag1BxPWU3TUclX+f/qX/0DGmvK8TotY9FNIbXV2sghgXhF1dj95yOf38/ aHhPazCeoEJ3bjLeb0sOynGrNXxx3SbNj3Yv4MZJkno3PbCEZ90u3WQM2pmyz5GbAghI VTNT8URWzEYzrjzYGj1gAMAkiBLPMrE0uL/vLOppa8GJnYQW2b0d5av0daalTnL+EJTh 10/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687909145; x=1690501145; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=UEotHXGDYPp+N3kzq40A+VGZCyOFKrHwBcgbYar1LOg=; b=YA0utJuqbQ8HDkyT1YPioLBpcFUlkbIxtbUzOWap6w6ppdCP+bTutaJmqAST+xwBYY 2J8B9NvnhHyh7NtEdyVL2Iutq1HMPv03kSXzvWJuvUECixNLxfTsVzoEfrvpkpu5ehM+ i//1G9+SwybTkwVe+eRUczF8whqZbsE8Idrqdyr/MAV81y2H5sFiXkiFcpGNVK2dsJsz +jv98neHJCL8Z6xfY+aBT4IJtoFHMz45YJssDoZ+yofUswXvEQ5wi5T/SsLgHnfoKfBx z7M/VZ1tBZSxEY99VnxfB8nfPppu9Hgi8UNnqhtsHxMq5H5VN4TiGe1DzrHQbzLN3wRU gLrg== X-Gm-Message-State: AC+VfDyTT6KmcovZwhojBvxvl9Tb0P9IByUo5KxiS1pAp38viOMTc5uz mBJLDGBbANLZWIO8dPwGFUXq8w== X-Google-Smtp-Source: ACHHUZ5OkeSCUeB3U9dhKZWjZbN1Lvc3xdWPDUeDJ0nMM+W1gpyxhwafH7+mT55TVE586Y44vKy4GQ== X-Received: by 2002:a05:6a20:244b:b0:12b:6898:2986 with SMTP id t11-20020a056a20244b00b0012b68982986mr3198761pzc.1.1687909145650; Tue, 27 Jun 2023 16:39:05 -0700 (PDT) Received: from ghost ([50.221.140.188]) by smtp.gmail.com with ESMTPSA id fe8-20020a056a002f0800b00666912d8a52sm4748899pfb.197.2023.06.27.16.38.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jun 2023 16:39:05 -0700 (PDT) Date: Tue, 27 Jun 2023 16:38:58 -0700 From: Charlie Jenkins To: Jessica Clarke Cc: Alexandre Ghiti , Atish Patra , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , bjorn@rivosinc.com, Anup Patel , Evan Green , linux-riscv , konstantin@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 1/2] RISC-V: mm: Restrict address space for sv39,sv48,sv57 Message-ID: References: <20230627222152.177716-1-charlie@rivosinc.com> <20230627222152.177716-2-charlie@rivosinc.com> <473F7474-D7AA-4C9F-95A3-320F1741EC50@jrtc27.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <473F7474-D7AA-4C9F-95A3-320F1741EC50@jrtc27.com> Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Yes it is small to have a default of 38-bits of userspace. I would be interesting in the opinions of other people on whether it would be acceptable to have the default be sv48 and require applications that prefer fewer bits to specify so with the given mmap hinting. 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5933DEB64D9 for ; Tue, 27 Jun 2023 23:39:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=fiG6liAFjqDVA+SdCU5e3dHAH8EM/FhTy/0b3du8ul8=; b=n2jTKO7CdV0U/g lP/QNcvy5fN7wumnEj7iOl4GdovjN2F7Ei98QRfvnPrCPqh9ApnkEAQXurGp/rlWX0N/uI2FGHY0s +YvolxMfDQDNsl0K/kINSO2slmZtJZCvE428AEQXk2clWgKIXOFXkszFDGK3AmHy8xS+Q7vflQ8XJ Xopnc+DGobwNvshJ7ZBTog1x3D4civ0Vi3agSdsU0DrnB375UafcmPfA4HQHe3NjKfKihMixRdxQA BYeKYE1QFXSY+uzliQY0TTxU3gmgMmEoS67OM6+sWm2y7yMDZcVa/gIgTArMDzmq+UxD19nCgXuF9 vLaZ1W3ggKWKRgmd9PYA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qEIH7-00EOAY-0I; Tue, 27 Jun 2023 23:39:09 +0000 Received: from mail-pf1-x436.google.com ([2607:f8b0:4864:20::436]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qEIH4-00EO9y-3D for linux-riscv@lists.infradead.org; Tue, 27 Jun 2023 23:39:08 +0000 Received: by mail-pf1-x436.google.com with SMTP id d2e1a72fcca58-67ef5af0ce8so850912b3a.2 for ; Tue, 27 Jun 2023 16:39:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20221208.gappssmtp.com; s=20221208; t=1687909145; x=1690501145; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=UEotHXGDYPp+N3kzq40A+VGZCyOFKrHwBcgbYar1LOg=; b=eYlkZ7RRnjfcOrSEl/RtfXtVIUDXY/SobZ+VOu+z+XZHDsoEHatYx90/aUQor4mUER wxITd49Kw7XvhgcVFYoq4mFZHL7z9aHi0r+QhYL+g6lSIMWRwtUnRedNFC3xOasfMCGu NMW3alJ7N94ag1BxPWU3TUclX+f/qX/0DGmvK8TotY9FNIbXV2sghgXhF1dj95yOf38/ aHhPazCeoEJ3bjLeb0sOynGrNXxx3SbNj3Yv4MZJkno3PbCEZ90u3WQM2pmyz5GbAghI VTNT8URWzEYzrjzYGj1gAMAkiBLPMrE0uL/vLOppa8GJnYQW2b0d5av0daalTnL+EJTh 10/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687909145; x=1690501145; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=UEotHXGDYPp+N3kzq40A+VGZCyOFKrHwBcgbYar1LOg=; b=ViKB0eCXUP5vvgk3Vxuv8iJclk77AYs6jVyaum51zPgdYGJqs8cYqXZUcMoZyYX0Q2 hot4MTIO4aZuyTjf435OqFK/zvkqVkUmT+0x8uP3bsWJ42E73aTfj4zoKwIlM5tnQsvB LnMOYBhPcH3ruOW066vG694/a888cQyd6SsTok2SEujAvyrP+PdKgPEjmScrxu39jdFQ wJvLNG2qCKja/3wreHMpXEqbMoULCPv2mKusksksFJ8d0C2wHp3VM6Ke7LPm89y1vaPZ XajDM+Z1IT8/NYBKBDYu+laRHlr0z7MvrF002ZDNlPMrvb9JLn9vdLBA5ccnO9kSU+ZO c6Ig== X-Gm-Message-State: AC+VfDwvwouuIxxElxocQ7vLWb5CJhspGMYy2aI9X+k547RMWhKA+KJv gWejjLzEoUZYHJ+2eB7v7kIyfw== X-Google-Smtp-Source: ACHHUZ5OkeSCUeB3U9dhKZWjZbN1Lvc3xdWPDUeDJ0nMM+W1gpyxhwafH7+mT55TVE586Y44vKy4GQ== X-Received: by 2002:a05:6a20:244b:b0:12b:6898:2986 with SMTP id t11-20020a056a20244b00b0012b68982986mr3198761pzc.1.1687909145650; Tue, 27 Jun 2023 16:39:05 -0700 (PDT) Received: from ghost ([50.221.140.188]) by smtp.gmail.com with ESMTPSA id fe8-20020a056a002f0800b00666912d8a52sm4748899pfb.197.2023.06.27.16.38.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jun 2023 16:39:05 -0700 (PDT) Date: Tue, 27 Jun 2023 16:38:58 -0700 From: Charlie Jenkins To: Jessica Clarke Cc: Alexandre Ghiti , Atish Patra , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , bjorn@rivosinc.com, Anup Patel , Evan Green , linux-riscv , konstantin@linuxfoundation.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 1/2] RISC-V: mm: Restrict address space for sv39,sv48,sv57 Message-ID: References: <20230627222152.177716-1-charlie@rivosinc.com> <20230627222152.177716-2-charlie@rivosinc.com> <473F7474-D7AA-4C9F-95A3-320F1741EC50@jrtc27.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <473F7474-D7AA-4C9F-95A3-320F1741EC50@jrtc27.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230627_163907_032050_081B1640 X-CRM114-Status: UNSURE ( 6.16 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Yes it is small to have a default of 38-bits of userspace. I would be interesting in the opinions of other people on whether it would be acceptable to have the default be sv48 and require applications that prefer fewer bits to specify so with the given mmap hinting. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv