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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 60D5EC433E0 for ; Wed, 5 Aug 2020 19:21:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39368206D4 for ; Wed, 5 Aug 2020 19:21:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596655287; bh=nPo8SyJqUjJ9z0rJpRBpkkeu083JsBlxNsr28VDgX9c=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=WM0/MGmxa9MWI9IzEoGju0rE07nLsdCE2KspynXLp0y06vyor3ZvI+sq2vplp8zdt W2Eih8l3GpvS3enFWnq2pBDjx1otejBZsTZfZ93F86FM+u46WJUTyLyurQUpiFIhZ7 7NXtdF6N9X877Adry54Qw1sfTu8rN+asbXZBzMPA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728564AbgHETV0 (ORCPT ); Wed, 5 Aug 2020 15:21:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:43130 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728976AbgHERl7 (ORCPT ); Wed, 5 Aug 2020 13:41:59 -0400 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4823D22CBB; Wed, 5 Aug 2020 12:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596629618; bh=nPo8SyJqUjJ9z0rJpRBpkkeu083JsBlxNsr28VDgX9c=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=DN/pSFKGnrcuF/DioT3fQLhKd9KxDsJUYUl0Lo82SO0RrZoUoAMS0p+RF2oNdR7j9 0icBWKv46n1IcKVg4n5Scb3ZM8QiZIQQXUbXpl5k3PXkczj+lJ2JkMAkJZ0vTFPAzo AI+uK6MDywGiCleiIYO1jyfFfMh3cLLcyGIfXtWI= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1k3IIa-0001gS-Ol; Wed, 05 Aug 2020 13:13:36 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 05 Aug 2020 13:13:36 +0100 From: Marc Zyngier To: Jingyi Wang Cc: drjones@redhat.com, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, eric.auger@redhat.com, wanghaibin.wang@huawei.com, yuzenghui@huawei.com Subject: Re: [kvm-unit-tests PATCH v3 00/10] arm/arm64: Add IPI/LPI/vtimer latency test In-Reply-To: <957a4657-7e17-b173-ea4d-10c29ab9e3cd@huawei.com> References: <20200731074244.20432-1-wangjingyi11@huawei.com> <957a4657-7e17-b173-ea4d-10c29ab9e3cd@huawei.com> User-Agent: Roundcube Webmail/1.4.5 Message-ID: <0bd81d1da9040fce660af46763507ac2@kernel.org> X-Sender: maz@kernel.org X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: wangjingyi11@huawei.com, drjones@redhat.com, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, eric.auger@redhat.com, wanghaibin.wang@huawei.com, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2020-08-05 12:54, Jingyi Wang wrote: > Hi all, > > Currently, kvm-unit-tests only support GICv3 vLPI injection. May I ask > is there any plan or suggestion on constructing irq bypass mechanism > to test vLPI direct injection in kvm-unit-tests? I'm not sure what you are asking for here. VLPIs are only delivered from a HW device, and the offloading mechanism isn't visible from userspace (you either have an enabled GICv4 implementation, or you don't). There are ways to *trigger* device MSIs from userspace and inject them in a guest, but that's only a debug feature, which shouldn't be enabled on a production system. M. -- Jazz is not dead. It just smells funny...