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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 3E85BC7619D for ; Thu, 20 Feb 2020 03:18:07 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id BC33924656 for ; Thu, 20 Feb 2020 03:18:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BC33924656 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.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 171144ACC4; Wed, 19 Feb 2020 22:18:06 -0500 (EST) 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 gYurMGVd22DD; Wed, 19 Feb 2020 22:18:05 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 06A0B4A95B; Wed, 19 Feb 2020 22:18:05 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id BA5E14A5A3 for ; Wed, 19 Feb 2020 22:18:03 -0500 (EST) 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 HxID84dW7hBs for ; Wed, 19 Feb 2020 22:18:02 -0500 (EST) Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 9E5494A59B for ; Wed, 19 Feb 2020 22:18:02 -0500 (EST) Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 4EA016CB1DDE32654D92; Thu, 20 Feb 2020 11:17:57 +0800 (CST) Received: from [127.0.0.1] (10.173.222.27) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.439.0; Thu, 20 Feb 2020 11:17:49 +0800 Subject: Re: [PATCH v4 04/20] irqchip/gic-v4.1: Map the ITS SGIR register page To: Marc Zyngier , , , , References: <20200214145736.18550-1-maz@kernel.org> <20200214145736.18550-5-maz@kernel.org> From: Zenghui Yu Message-ID: <154bd918-de16-e810-d10d-e7642e340415@huawei.com> Date: Thu, 20 Feb 2020 11:17:47 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.2.0 MIME-Version: 1.0 In-Reply-To: <20200214145736.18550-5-maz@kernel.org> Content-Language: en-US X-Originating-IP: [10.173.222.27] X-CFilter-Loop: Reflected Cc: Lorenzo Pieralisi , Jason Cooper , Robert Richter , Thomas Gleixner 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 On 2020/2/14 22:57, Marc Zyngier wrote: > One of the new features of GICv4.1 is to allow virtual SGIs to be > directly signaled to a VPE. For that, the ITS has grown a new > 64kB page containing only a single register that is used to > signal a SGI to a given VPE. > > Add a second mapping covering this new 64kB range, and take this > opportunity to limit the original mapping to 64kB, which is enough > to cover the span of the ITS registers. Yes, no need to do ioremap for the translation register. > > Signed-off-by: Marc Zyngier Reviewed-by: Zenghui Yu _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm