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=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS 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 1496DC4BA24 for ; Thu, 27 Feb 2020 10:24:43 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 D63C624672 for ; Thu, 27 Feb 2020 10:24:42 +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="hXlM70B8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D63C624672 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:56692 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j7GLR-0005qm-1e for qemu-devel@archiver.kernel.org; Thu, 27 Feb 2020 05:24:41 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40517) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j7GC4-0004OL-UP for qemu-devel@nongnu.org; Thu, 27 Feb 2020 05:15:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j7GC2-0001Yj-SD for qemu-devel@nongnu.org; Thu, 27 Feb 2020 05:15:00 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:46519 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1j7GC1-0001UP-OQ for qemu-devel@nongnu.org; Thu, 27 Feb 2020 05:14:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1582798495; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7BJc03B0S3OKlAGbitvN5dpmwN+YdFl+CckVsdEMIJE=; b=hXlM70B8tOAzpRMxZ+K6shhKr5Sxo92s1+0soFC3m0f2Xprd1Ewm00+fs5fjUpewe8qXl/ WgUO26UflAK1xv9RmUIrhfXTgWoWEBLNz2pjl1MhivYow/GX/TtZnsrSiLLUPj1XtwipLg rG23B9NSoTHgHp2VM4qufCuG36MU4cA= 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-175-9Yix3FYUNNGWA9dC4mphqg-1; Thu, 27 Feb 2020 05:14:53 -0500 X-MC-Unique: 9Yix3FYUNNGWA9dC4mphqg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 40B538017CC; Thu, 27 Feb 2020 10:14:52 +0000 (UTC) Received: from t480s.redhat.com (ovpn-116-36.ams2.redhat.com [10.36.116.36]) by smtp.corp.redhat.com (Postfix) with ESMTP id C7EA06E3EE; Thu, 27 Feb 2020 10:14:47 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v3 14/15] numa: Introduce ram_block_notifiers_support_resize() Date: Thu, 27 Feb 2020 11:12:04 +0100 Message-Id: <20200227101205.5616-15-david@redhat.com> In-Reply-To: <20200227101205.5616-1-david@redhat.com> References: <20200227101205.5616-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , "Michael S . Tsirkin" , Igor Kotrasinski , David Hildenbrand , "Dr . David Alan Gilbert" , Peter Xu , Murilo Opsfelder Araujo , Igor Mammedov , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" We want to actually use resizeable allocations in resizeable ram blocks (IOW, make everything between used_length and max_length inaccessible) - however, not all ram block notifiers can support that. Introduce a way to detect if any registered notifier does not support resizes - ram_block_notifiers_support_resize() - which we can later use to fallback to legacy handling if a registered notifier (esp., SEV and HAX) does not support actual resizes. Cc: Richard Henderson Cc: Paolo Bonzini Cc: "Dr. David Alan Gilbert" Cc: Eduardo Habkost Cc: Marcel Apfelbaum Cc: "Michael S. Tsirkin" Cc: Igor Mammedov Signed-off-by: David Hildenbrand --- hw/core/numa.c | 12 ++++++++++++ include/exec/ramlist.h | 1 + 2 files changed, 13 insertions(+) diff --git a/hw/core/numa.c b/hw/core/numa.c index 37ce175e13..1d5288c22c 100644 --- a/hw/core/numa.c +++ b/hw/core/numa.c @@ -914,3 +914,15 @@ void ram_block_notify_resize(void *host, size_t old_si= ze, size_t new_size) } } } + +bool ram_block_notifiers_support_resize(void) +{ + RAMBlockNotifier *notifier; + + QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) { + if (!notifier->ram_block_resized) { + return false; + } + } + return true; +} diff --git a/include/exec/ramlist.h b/include/exec/ramlist.h index 293c0ddabe..ac5811be96 100644 --- a/include/exec/ramlist.h +++ b/include/exec/ramlist.h @@ -79,6 +79,7 @@ void ram_block_notifier_remove(RAMBlockNotifier *n); void ram_block_notify_add(void *host, size_t size, size_t max_size); void ram_block_notify_remove(void *host, size_t size, size_t max_size); void ram_block_notify_resize(void *host, size_t old_size, size_t new_size)= ; +bool ram_block_notifiers_support_resize(void); =20 void ram_block_dump(Monitor *mon); =20 --=20 2.24.1