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=-9.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 7058EC43457 for ; Mon, 12 Oct 2020 12:54:35 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1A23B21BE5 for ; Mon, 12 Oct 2020 12:54:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="IZ/wXXsD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A23B21BE5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id BEB5F86A4E; Mon, 12 Oct 2020 12:54:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id StrSovf5tF0T; Mon, 12 Oct 2020 12:54:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 226E586A51; Mon, 12 Oct 2020 12:54:34 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 0BCFEC07FF; Mon, 12 Oct 2020 12:54:34 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id B15ABC0051 for ; Mon, 12 Oct 2020 12:54:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id A0453873D5 for ; Mon, 12 Oct 2020 12:54:32 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id f8HQgPs-PinA for ; Mon, 12 Oct 2020 12:54:32 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by hemlock.osuosl.org (Postfix) with ESMTPS id 17F66873AF for ; Mon, 12 Oct 2020 12:54:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602507271; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UXluXxgVdZ1Q2vjxVm/NRlcU8ef+xQKUslYtIQfW6Qc=; b=IZ/wXXsDa31bYG6UoNS9CpFL+uhVwziJSkvov9n1PodWcLbTzq2o4HxinMbVRho9ERttdw ChQXwCp3VUfIzFRNcMYf/F51akgYLEP/fxUf0AW1yHQHwPL8lub72wJ4ogRPnfz0+0lwKZ TfGNAmtWGdEgzwvR+sanAtyCA2xtiL4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-208-xsC7pkQ8Mmm8uZ3wObNXAA-1; Mon, 12 Oct 2020 08:54:29 -0400 X-MC-Unique: xsC7pkQ8Mmm8uZ3wObNXAA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CB0291084D63; Mon, 12 Oct 2020 12:54:27 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-251.ams2.redhat.com [10.36.113.251]) by smtp.corp.redhat.com (Postfix) with ESMTP id ED4DC60C07; Mon, 12 Oct 2020 12:54:16 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Subject: [PATCH v1 05/29] virtio-mem: generalize check for added memory Date: Mon, 12 Oct 2020 14:52:59 +0200 Message-Id: <20201012125323.17509-6-david@redhat.com> In-Reply-To: <20201012125323.17509-1-david@redhat.com> References: <20201012125323.17509-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Cc: Pankaj Gupta , "Michael S . Tsirkin" , virtualization@lists.linux-foundation.org, linux-mm@kvack.org, Andrew Morton X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Let's check by traversing busy system RAM resources instead, to avoid relying on memory block states. Don't use walk_system_ram_range(), as that works on pages and we want to use the bare addresses we have easily at hand. Cc: "Michael S. Tsirkin" Cc: Jason Wang Cc: Pankaj Gupta Signed-off-by: David Hildenbrand --- drivers/virtio/virtio_mem.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index b3eebac7191f..6bbd1cfd10d3 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -1749,6 +1749,20 @@ static void virtio_mem_delete_resource(struct virtio_mem *vm) vm->parent_resource = NULL; } +static int virtio_mem_range_has_system_ram(struct resource *res, void *arg) +{ + return 1; +} + +static bool virtio_mem_has_memory_added(struct virtio_mem *vm) +{ + const unsigned long flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; + + return walk_iomem_res_desc(IORES_DESC_NONE, flags, vm->addr, + vm->addr + vm->region_size, NULL, + virtio_mem_range_has_system_ram) == 1; +} + static int virtio_mem_probe(struct virtio_device *vdev) { struct virtio_mem *vm; @@ -1870,10 +1884,7 @@ static void virtio_mem_remove(struct virtio_device *vdev) * the system. And there is no way to stop the driver/device from going * away. Warn at least. */ - if (vm->nb_mb_state[VIRTIO_MEM_MB_STATE_OFFLINE] || - vm->nb_mb_state[VIRTIO_MEM_MB_STATE_OFFLINE_PARTIAL] || - vm->nb_mb_state[VIRTIO_MEM_MB_STATE_ONLINE] || - vm->nb_mb_state[VIRTIO_MEM_MB_STATE_ONLINE_PARTIAL]) { + if (virtio_mem_has_memory_added(vm)) { dev_warn(&vdev->dev, "device still has system memory added\n"); } else { virtio_mem_delete_resource(vm); -- 2.26.2 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization