From patchwork Wed Jun 10 11:54:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 280916 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=-6.5 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, URIBL_BLOCKED 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 15440C433DF for ; Wed, 10 Jun 2020 11:58:46 +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 D4CE02074B for ; Wed, 10 Jun 2020 11:58:45 +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="c8fEJXLg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D4CE02074B 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]:50288 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jizNV-0000Dk-1g for qemu-devel@archiver.kernel.org; Wed, 10 Jun 2020 07:58:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43376) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jizK4-0003CC-LA for qemu-devel@nongnu.org; Wed, 10 Jun 2020 07:55:12 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:39561 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jizK3-0001xb-TN for qemu-devel@nongnu.org; Wed, 10 Jun 2020 07:55:12 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1591790111; 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=/bRpzWo8mGWvq3enPFtqLN32egzNgjYQizck8xugJ+M=; b=c8fEJXLguJXrmaV5V32A0rFBmkq81eRUOB4jKG/hqeNXxU8QTzj/AkCO5hHiCXoVnSPdrc 5vpsUcVN9GTB5/7yOiw3171odUG64gxnvHXZ+ham9MJRbBbr5bos8BBO+udCgIzHTSqGVN +MlClYt3y4yuAXC0+bodchkTqsC9xN0= 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-502-DLX1pjx1OeOHbokAJF5eVg-1; Wed, 10 Jun 2020 07:55:07 -0400 X-MC-Unique: DLX1pjx1OeOHbokAJF5eVg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7E40A461; Wed, 10 Jun 2020 11:55:06 +0000 (UTC) Received: from t480s.redhat.com (ovpn-114-42.ams2.redhat.com [10.36.114.42]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0AE695D9D3; Wed, 10 Jun 2020 11:54:58 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Subject: [PATCH v4 06/21] target/i386: sev: Use ram_block_discard_disable() Date: Wed, 10 Jun 2020 13:54:04 +0200 Message-Id: <20200610115419.51688-7-david@redhat.com> In-Reply-To: <20200610115419.51688-1-david@redhat.com> References: <20200610115419.51688-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Received-SPF: pass client-ip=205.139.110.120; envelope-from=david@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/09 23:51:15 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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 , kvm@vger.kernel.org, "Michael S . Tsirkin" , David Hildenbrand , "Dr . David Alan Gilbert" , qemu-s390x@nongnu.org, Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" AMD SEV will pin all guest memory, mark discarding of RAM broken. At the time this is called, we cannot have anyone active that relies on discards to work properly - let's still implement error handling. Reviewed-by: Dr. David Alan Gilbert Cc: "Michael S. Tsirkin" Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Signed-off-by: David Hildenbrand --- target/i386/sev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/i386/sev.c b/target/i386/sev.c index 51cdbe5496..4a4863db28 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -649,6 +649,12 @@ sev_guest_init(const char *id) uint32_t host_cbitpos; struct sev_user_data_status status = {}; + ret = ram_block_discard_disable(true); + if (ret) { + error_report("%s: cannot disable RAM discard", __func__); + return NULL; + } + sev_state = s = g_new0(SEVState, 1); s->sev_info = lookup_sev_guest_info(id); if (!s->sev_info) { @@ -724,6 +730,7 @@ sev_guest_init(const char *id) err: g_free(sev_state); sev_state = NULL; + ram_block_discard_disable(false); return NULL; }