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 X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 5FF7EC31E49 for ; Wed, 19 Jun 2019 12:52:12 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id DF74A208CB for ; Wed, 19 Jun 2019 12:52:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DF74A208CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 39FFF4A4F5; Wed, 19 Jun 2019 08:52:11 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QRKs4thya0kp; Wed, 19 Jun 2019 08:52:10 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 076424A3B4; Wed, 19 Jun 2019 08:52:10 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4992D4A3B4 for ; Wed, 19 Jun 2019 08:52:08 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mNav8z0d6qSo for ; Wed, 19 Jun 2019 08:52:07 -0400 (EDT) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id F00A94A389 for ; Wed, 19 Jun 2019 08:52:06 -0400 (EDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 64E27360; Wed, 19 Jun 2019 05:52:06 -0700 (PDT) Received: from [10.1.196.50] (e108454-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0EDE23F738; Wed, 19 Jun 2019 05:52:03 -0700 (PDT) Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file To: Guo Ren References: <20190321163623.20219-1-julien.grall@arm.com> <20190321163623.20219-12-julien.grall@arm.com> <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com> From: Julien Grall Message-ID: Date: Wed, 19 Jun 2019 13:52:02 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: aou@eecs.berkeley.edu, Marc Zyngier , catalin.marinas@arm.com, Anup Patel , will.deacon@arm.com, linux-kernel@vger.kernel.org, rppt@linux.ibm.com, hch@infradead.org, Atish.Patra@wdc.com, Palmer Dabbelt , gary@garyguo.net, paul.walmsley@sifive.com, linux-riscv@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Hi Guo, On 19/06/2019 12:51, Guo Ren wrote: > On Wed, Jun 19, 2019 at 4:54 PM Julien Grall wrote: >> >> >> >> On 6/19/19 9:07 AM, Guo Ren wrote: >>> Hi Julien, >> >> Hi, >> >>> >>> You forgot CCing C-SKY folks :P >> >> I wasn't aware you could be interested :). >> >>> >>> Move arm asid allocator code in a generic one is a agood idea, I've >>> made a patchset for C-SKY and test is on processing, See: >>> https://lore.kernel.org/linux-csky/1560930553-26502-1-git-send-email-guoren@kernel.org/ >>> >>> If you plan to seperate it into generic one, I could co-work with you. >> >> Was the ASID allocator work out of box on C-Sky? > Almost done, but one question: > arm64 remove the code in switch_mm: > cpumask_clear_cpu(cpu, mm_cpumask(prev)); > cpumask_set_cpu(cpu, mm_cpumask(next)); > > Why? Although arm64 cache operations could affect all harts with CTC > method of interconnect, I think we should > keep these code for primitive integrity in linux. Because cpu_bitmap > is in mm_struct instead of mm->context. I will let Will answer to this. [...] >> If so, I can easily move the code in a generic place (maybe lib/asid.c). > I think it's OK. Will emits concern to move the code in lib. So I will stick with what I currently have. Cheers, -- Julien Grall _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm