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=-10.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 71199C433DF for ; Mon, 10 Aug 2020 13:47:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C0812073A for ; Mon, 10 Aug 2020 13:47:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ItWuB8pP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726806AbgHJNrZ (ORCPT ); Mon, 10 Aug 2020 09:47:25 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:20021 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726582AbgHJNrY (ORCPT ); Mon, 10 Aug 2020 09:47:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1597067243; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=z8HxGZRX0ri3hL7o0UjLbQAuAiwO1V2HqhDwK8CAsEc=; b=ItWuB8pPNi0nxCVULljQkIlIeACHv7HM5byelrZmuCeZ9y/eoCqanYwvV77jVDK1UZ9Anm /XY9UTjC4Jcw4RjK1qXRd4IEnp9+LS/O0l11ATZqd/SS3v7FTScG8kl9IJwVluC7zEpySf adkNg59/X8aX/qIyEtWhIYxoliKfklg= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-493-0DSijqLUMh2cqASImrVfCA-1; Mon, 10 Aug 2020 09:47:21 -0400 X-MC-Unique: 0DSijqLUMh2cqASImrVfCA-1 Received: by mail-wm1-f72.google.com with SMTP id g72so2807724wme.4 for ; Mon, 10 Aug 2020 06:47:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=z8HxGZRX0ri3hL7o0UjLbQAuAiwO1V2HqhDwK8CAsEc=; b=PGpggSk8/yEvBZ3SL0zQAy8OCm9G9gEtdoiK1hVo77dB9cPGRAJdo5T1yYAdlvGajG +9L9hJwXPHZlCpqbHAbAto3p8i+FBRbcDKR4vAEu53e0UM8+rjAG/s1uKDJW8sIDFrIL lZ+ax+8NCDVnVkkoFPFEUsYR/6wK+ic6Df7R0C/Kb9+aO/ITEzi3eiTqNGGN4+5mio8w w/PbEDf6JLJaPQxigEbldt7ihOdtvDT0TyC0EUO7PYWqUjcPJOONyondlEXMPTetHurd qaqcYSCfcN1jvolpqnAP96Ele2U8+tLXdAf3/Js/ZmYQj7z6gEVCxE2X+qt/4RKtrWvP W8/A== X-Gm-Message-State: AOAM532Wo05eDYRcg7OmPSI3WZkbvHYAuw/x+zDK+MB/BZvdc4idh+E6 GY7LbflwHLR3GRFMBYtjYALHZjB1hSLffBq29AEcrhyPCiDNtOFdEhlFVvXGvpVhp+5SYyJKLMd n88LWjwuxucaD+oIybVNi/rPKOA== X-Received: by 2002:a1c:1b93:: with SMTP id b141mr25773831wmb.150.1597067239974; Mon, 10 Aug 2020 06:47:19 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxiKr4k+daNBgpJsJdAPnBhBio+aWOVADeV99EvpK7df75SgAQYK1b8ZOE3OtN5IXqUpVc1HA== X-Received: by 2002:a1c:1b93:: with SMTP id b141mr25773815wmb.150.1597067239779; Mon, 10 Aug 2020 06:47:19 -0700 (PDT) Received: from redhat.com ([192.117.173.58]) by smtp.gmail.com with ESMTPSA id g188sm24329476wma.5.2020.08.10.06.47.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Aug 2020 06:47:18 -0700 (PDT) Date: Mon, 10 Aug 2020 09:47:15 -0400 From: "Michael S. Tsirkin" To: Vivek Goyal Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, virtio-fs@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com, Sebastien Boeuf , kvm@vger.kernel.org Subject: Re: [PATCH v2 03/20] virtio: Add get_shm_region method Message-ID: <20200810094548-mutt-send-email-mst@kernel.org> References: <20200807195526.426056-1-vgoyal@redhat.com> <20200807195526.426056-4-vgoyal@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200807195526.426056-4-vgoyal@redhat.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Fri, Aug 07, 2020 at 03:55:09PM -0400, Vivek Goyal wrote: > From: Sebastien Boeuf > > Virtio defines 'shared memory regions' that provide a continuously > shared region between the host and guest. > > Provide a method to find a particular region on a device. > > Signed-off-by: Sebastien Boeuf > Signed-off-by: Dr. David Alan Gilbert > Cc: kvm@vger.kernel.org > Cc: "Michael S. Tsirkin" I'm not sure why doesn't b4 pick up reset of this patchset. where can I find it? IIUC all this is 5.10 material, right? > --- > include/linux/virtio_config.h | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index bb4cc4910750..c859f000a751 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -10,6 +10,11 @@ > > struct irq_affinity; > > +struct virtio_shm_region { > + u64 addr; > + u64 len; > +}; > + > /** > * virtio_config_ops - operations for configuring a virtio device > * Note: Do not assume that a transport implements all of the operations > @@ -65,6 +70,7 @@ struct irq_affinity; > * the caller can then copy. > * @set_vq_affinity: set the affinity for a virtqueue (optional). > * @get_vq_affinity: get the affinity for a virtqueue (optional). > + * @get_shm_region: get a shared memory region based on the index. > */ > typedef void vq_callback_t(struct virtqueue *); > struct virtio_config_ops { > @@ -88,6 +94,8 @@ struct virtio_config_ops { > const struct cpumask *cpu_mask); > const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev, > int index); > + bool (*get_shm_region)(struct virtio_device *vdev, > + struct virtio_shm_region *region, u8 id); > }; > > /* If driver didn't advertise the feature, it will never appear. */ > @@ -250,6 +258,15 @@ int virtqueue_set_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask) > return 0; > } > > +static inline > +bool virtio_get_shm_region(struct virtio_device *vdev, > + struct virtio_shm_region *region, u8 id) > +{ > + if (!vdev->config->get_shm_region) > + return false; > + return vdev->config->get_shm_region(vdev, region, id); > +} > + > static inline bool virtio_is_little_endian(struct virtio_device *vdev) > { > return virtio_has_feature(vdev, VIRTIO_F_VERSION_1) || > -- > 2.25.4