From patchwork Fri Nov 10 14:11:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 836760 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3yYMSc20ypz9sNc for ; Sat, 11 Nov 2017 01:13:04 +1100 (AEDT) Received: from localhost ([::1]:41961 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eDA3K-0003wI-89 for incoming@patchwork.ozlabs.org; Fri, 10 Nov 2017 09:13:02 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32948) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eDA2Y-0003t1-37 for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eDA2T-0004oG-5R for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:14 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:53416) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eDA2S-0004lm-P1 for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:09 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vAAEAAd5068995 for ; Fri, 10 Nov 2017 09:12:03 -0500 Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by mx0a-001b2d01.pphosted.com with ESMTP id 2e5atk8tta-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 10 Nov 2017 09:12:03 -0500 Received: from localhost by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 10 Nov 2017 07:12:00 -0700 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id vAAEC0NU262492; Fri, 10 Nov 2017 07:12:00 -0700 Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6A168C6042; Fri, 10 Nov 2017 07:12:00 -0700 (MST) Received: from sbct-3.watson.ibm.com (unknown [9.47.158.153]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP id 0D806C603C; Fri, 10 Nov 2017 07:11:59 -0700 (MST) From: Stefan Berger To: qemu-devel@nongnu.org, marcandre.lureau@redhat.com Date: Fri, 10 Nov 2017 09:11:41 -0500 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1510323112-2207-1-git-send-email-stefanb@linux.vnet.ibm.com> References: <1510323112-2207-1-git-send-email-stefanb@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17111014-0020-0000-0000-00000CFA30AC X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008044; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000239; SDB=6.00943880; UDB=6.00476265; IPR=6.00724162; BA=6.00005686; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017951; XFM=3.00000015; UTC=2017-11-10 14:12:02 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17111014-0021-0000-0000-00005ED9D2DE Message-Id: <1510323112-2207-3-git-send-email-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-11-10_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1711100198 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH v3 02/13] tpm_tis: limit size of buffer from backend X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: amarnath.valluri@intel.com, Stefan Berger Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This is a preparatory patch for the subsequent ones where we get rid of the flexibility of supporting any kind of buffer size that the backend may support. We keep the size at 4096, which is also the size the external emulator supports. So, limit the size of the buffer we can support and pass it back to the backend. Signed-off-by: Stefan Berger Reviewed-by: Marc-André Lureau --- hw/tpm/tpm_tis.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index 69fe531..90c6df2 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -1008,7 +1008,8 @@ static void tpm_tis_reset(DeviceState *dev) int c; s->be_tpm_version = tpm_backend_get_tpm_version(s->be_driver); - s->be_buffer_size = tpm_backend_get_buffer_size(s->be_driver); + s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->be_driver), + TPM_TIS_BUFFER_MAX); tpm_backend_reset(s->be_driver); @@ -1040,7 +1041,7 @@ static void tpm_tis_reset(DeviceState *dev) tpm_tis_realloc_buffer(&s->loc[c].r_buffer, s->be_buffer_size); } - tpm_tis_do_startup_tpm(s, 0); + tpm_tis_do_startup_tpm(s, s->be_buffer_size); } static const VMStateDescription vmstate_tpm_tis = {