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=-11.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 9EE23C432BE for ; Tue, 3 Aug 2021 15:47:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85D1D60EFD for ; Tue, 3 Aug 2021 15:47:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237018AbhHCPsJ (ORCPT ); Tue, 3 Aug 2021 11:48:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:46396 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236994AbhHCPsH (ORCPT ); Tue, 3 Aug 2021 11:48:07 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 99A5A60EFD; Tue, 3 Aug 2021 15:47:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1628005676; bh=MG4fAieao0UPi4ffT0mbv01ftN/DNkPTsgdtYW/U3b0=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=JMxzV8817ns0XcLosSwn1TLOGdXCxTTb3nBhRBb1PdBUrW5Nnd/7xx/D7oh3eGvTM WK1nrMfIGlBgj7eHwljrNB2a1OnkfMJy7eONBxFJhrggHMOCOUN1B5BN/95IaHuFIu bKsNYve1kUpE/mRsq7C2W9RwB3aJbpS5fWCspPTpUnYsLDtpNQ+6joNtsFAUvZpFiS Nn4D8Ebal1JPMuyTxipY5u6vuLpi6GcF7JPCcO1X6WZLcUGk2fanMfHA/k8pSD8xs5 e2NoXPjBkwojqn0SEcGmhOWB4eimT/NVQe+KT65xA4lDP1+U9wKRypiL6AY0r2p3m1 r3tLen9j4PnBg== Received: by mail-ed1-f51.google.com with SMTP id x90so29529755ede.8; Tue, 03 Aug 2021 08:47:56 -0700 (PDT) X-Gm-Message-State: AOAM533wiHrQL0uvpBzbRiHK6anfO79FkzfhOAQ1prFHMycVL9n+HKem H+Y7hEIFc4B67nvguEUkT+fppZkQMNd/YuHy2A== X-Google-Smtp-Source: ABdhPJzuBnfkNQtqqLg2h9sTkUQTkdyCINtgxA59VUetynvl9LB1QKx942SZoaOuOW2U1PMG/KLxk/DqtQdWvGwL0ik= X-Received: by 2002:a05:6402:2043:: with SMTP id bc3mr26352466edb.62.1628005675201; Tue, 03 Aug 2021 08:47:55 -0700 (PDT) MIME-Version: 1.0 References: <20210803043014.paskwghdio6azplp@vireshk-i7> In-Reply-To: <20210803043014.paskwghdio6azplp@vireshk-i7> From: Rob Herring Date: Tue, 3 Aug 2021 09:47:42 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH V4 3/5] dt-bindings: gpio: Add bindings for gpio-virtio To: Viresh Kumar Cc: Jason Wang , "Michael S. Tsirkin" , Arnd Bergmann , Jean-Philippe Brucker , Linus Walleij , Bartosz Golaszewski , Vincent Guittot , Bill Mills , =?UTF-8?B?QWxleCBCZW5uw6ll?= , "Enrico Weigelt, metux IT consult" , Jie Deng , devicetree@vger.kernel.org, "linux-kernel@vger.kernel.org" , "open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE" , Arnd Bergmann , "open list:GPIO SUBSYSTEM" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org n Mon, Aug 2, 2021 at 10:30 PM Viresh Kumar wrote: > > On 02-08-21, 13:40, Rob Herring wrote: > > Humm, how does one implement interrupts without a parent interrupt? It > > uses the parent virtio,mmio interrupt? > > Kind of, yeah, but not necessarily. > > The interrupt information is passed over buffers shared between host and guest. > Now the guest may process the buffers when it receives a notification from the > host, that will be at downpath of an interrupt for virtio,mmio. Or the guest may > poll on the virtqueue and process any buffers as soon as they are made > available, no interrupts then. Okay, thanks for the explanation. Reviewed-by: Rob Herring Rob