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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59BA2C433EF for ; Mon, 17 Jan 2022 02:54:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234082AbiAQCyD (ORCPT ); Sun, 16 Jan 2022 21:54:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232774AbiAQCyD (ORCPT ); Sun, 16 Jan 2022 21:54:03 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD7CFC061574 for ; Sun, 16 Jan 2022 18:54:02 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 657FFB80D4E for ; Mon, 17 Jan 2022 02:54:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A129C36AE9; Mon, 17 Jan 2022 02:53:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642388040; bh=KFx+a5BYMMi2f+IK88CebpOMSE3REIsFxRXjxNpUz28=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PumacI+zRxX+OE6k7LMEN9GskZl0C0usGSqq37e2YuyJ/y2E8me2ELRdcTc04+1wT NEY3tG8HdlVMwi/OQBVqT5Ne4THGTooboRw/HGq6u8Y6tQIqOjxdMcs8DpGwNNvrGd ctY3K6Vt0J+iRXrYw8LfL/7XdQKmgogLnjy5MjVsCLmP/VPevwho3ggwhSvgBJzJL6 4cvioOOzaRP6bG5JtpJFmQ2SBFX2GN+u1fV5ikyAiJKI60gxHsjEWd5C61cV99KMcE ZmeNzOZCAW3DT4DgRPYiA3iDQJ8sDZyqI2LlNNlR0n7N+pHr6v4LGxvh5rYC9dgzoO yfCosbmn4VuRQ== Date: Mon, 17 Jan 2022 04:53:45 +0200 From: Jarkko Sakkinen To: Yang Zhong Cc: qemu-devel@nongnu.org, pbonzini@redhat.com, eblake@redhat.com, linux-sgx@vger.kernel.org Subject: Re: unable to execute QEMU command 'qom-get': Property 'sgx-epc.unavailable-features' not found Message-ID: References: <20211125124722.GA25401@yangzhon-Virtual> <20211130121536.GA32686@yangzhon-Virtual> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211130121536.GA32686@yangzhon-Virtual> Precedence: bulk List-ID: X-Mailing-List: linux-sgx@vger.kernel.org On Tue, Nov 30, 2021 at 08:15:36PM +0800, Yang Zhong wrote: > On Thu, Nov 25, 2021 at 08:47:22PM +0800, Yang Zhong wrote: > > Hello Paolo, > > > > Our customer used the Libvirt XML to start a SGX VM, but failed. > > > > libvirt.libvirtError: internal error: unable to execute QEMU command 'qom-get': Property 'sgx-epc.unavailable-features' not found > > > > The XML file, > > > > > > > > > > > > > > > > > > > > The new compound property command should be located in /machine path, > > which are different with old command '-sgx-epc id=epc1,memdev=mem1'. > > > > I also tried this from Qemu monitor tool, > > (qemu) qom-list /machine > > type (string) > > kernel (string) > > ...... > > sgx-epc (SgxEPC) > > ...... > > sgx-epc[0] (child) > > ...... > > > > We can find sgx-epc from /machine list. > > > > This issue is clear now, which is caused by Libvirt to get the CPU's unavailable-features by below command: > {"execute":"qom-get","arguments":{"path":"/machine/unattached/device[0]","property":"unavailable-features"} > > but in SGX vm, since the sgx is initialized before VCPU because sgx need set the virtual EPC info in the cpuid. > > So the /machine/unattached/device[0] is occupied by sgx, which fail to get the unvailable-features from > /machine/unattached/device[0]. > > > We need fix this issue, but this can be done in Qemu or Libvirt side. > > 1) Libvirt side > If the libvirt support SGX EPCs, libvirt can use /machine/unattached/device[n] to check "unavailable-features". > n is the next number of sgx's unattached_count. > > 2) Qemu side > > One temp patch to create one /sgx in the /machine in the device_set_realized() > diff --git a/hw/core/qdev.c b/hw/core/qdev.c > index 84f3019440..4154eef0d8 100644 > --- a/hw/core/qdev.c > +++ b/hw/core/qdev.c > @@ -497,7 +497,7 @@ static void device_set_realized(Object *obj, bool value, Error **errp) > NamedClockList *ncl; > Error *local_err = NULL; > bool unattached_parent = false; > - static int unattached_count; > + static int unattached_count, sgx_count; > > if (dev->hotplugged && !dc->hotpluggable) { > error_setg(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj)); > @@ -509,7 +509,15 @@ static void device_set_realized(Object *obj, bool value, Error **errp) > goto fail; > } > > - if (!obj->parent) { > + if (!obj->parent && !strcmp(object_get_typename(obj), "sgx-epc")) { > + gchar *name = g_strdup_printf("device[%d]", sgx_count++); > + > + object_property_add_child(container_get(qdev_get_machine(), > + "/sgx"), > + name, obj); > + unattached_parent = true; > + g_free(name); > + } else if (!obj->parent) { > gchar *name = g_strdup_printf("device[%d]", unattached_count++); > > object_property_add_child(container_get(qdev_get_machine() > > This patch can make sure vcpu is still /machine/unattached/device[0]. > > > Which solution is best? thanks! Has either of the fixes reached yet reached upstream or not? > Yang BR, Jarkko 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A48C6C433F5 for ; Mon, 17 Jan 2022 02:54:52 +0000 (UTC) Received: from localhost ([::1]:57950 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n9IAV-00084a-8y for qemu-devel@archiver.kernel.org; Sun, 16 Jan 2022 21:54:51 -0500 Received: from eggs.gnu.org ([209.51.188.92]:36542) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n9I9n-0007OJ-A5 for qemu-devel@nongnu.org; Sun, 16 Jan 2022 21:54:07 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:37964) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n9I9k-0006Ag-R4 for qemu-devel@nongnu.org; Sun, 16 Jan 2022 21:54:06 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3D3DFB80CBC; Mon, 17 Jan 2022 02:54:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A129C36AE9; Mon, 17 Jan 2022 02:53:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642388040; bh=KFx+a5BYMMi2f+IK88CebpOMSE3REIsFxRXjxNpUz28=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PumacI+zRxX+OE6k7LMEN9GskZl0C0usGSqq37e2YuyJ/y2E8me2ELRdcTc04+1wT NEY3tG8HdlVMwi/OQBVqT5Ne4THGTooboRw/HGq6u8Y6tQIqOjxdMcs8DpGwNNvrGd ctY3K6Vt0J+iRXrYw8LfL/7XdQKmgogLnjy5MjVsCLmP/VPevwho3ggwhSvgBJzJL6 4cvioOOzaRP6bG5JtpJFmQ2SBFX2GN+u1fV5ikyAiJKI60gxHsjEWd5C61cV99KMcE ZmeNzOZCAW3DT4DgRPYiA3iDQJ8sDZyqI2LlNNlR0n7N+pHr6v4LGxvh5rYC9dgzoO yfCosbmn4VuRQ== Date: Mon, 17 Jan 2022 04:53:45 +0200 From: Jarkko Sakkinen To: Yang Zhong Subject: Re: unable to execute QEMU command 'qom-get': Property 'sgx-epc.unavailable-features' not found Message-ID: References: <20211125124722.GA25401@yangzhon-Virtual> <20211130121536.GA32686@yangzhon-Virtual> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211130121536.GA32686@yangzhon-Virtual> Received-SPF: pass client-ip=145.40.68.75; envelope-from=jarkko@kernel.org; helo=ams.source.kernel.org X-Spam_score_int: -77 X-Spam_score: -7.8 X-Spam_bar: ------- X-Spam_report: (-7.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.7, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, eblake@redhat.com, qemu-devel@nongnu.org, linux-sgx@vger.kernel.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Nov 30, 2021 at 08:15:36PM +0800, Yang Zhong wrote: > On Thu, Nov 25, 2021 at 08:47:22PM +0800, Yang Zhong wrote: > > Hello Paolo, > > > > Our customer used the Libvirt XML to start a SGX VM, but failed. > > > > libvirt.libvirtError: internal error: unable to execute QEMU command 'qom-get': Property 'sgx-epc.unavailable-features' not found > > > > The XML file, > > > > > > > > > > > > > > > > > > > > The new compound property command should be located in /machine path, > > which are different with old command '-sgx-epc id=epc1,memdev=mem1'. > > > > I also tried this from Qemu monitor tool, > > (qemu) qom-list /machine > > type (string) > > kernel (string) > > ...... > > sgx-epc (SgxEPC) > > ...... > > sgx-epc[0] (child) > > ...... > > > > We can find sgx-epc from /machine list. > > > > This issue is clear now, which is caused by Libvirt to get the CPU's unavailable-features by below command: > {"execute":"qom-get","arguments":{"path":"/machine/unattached/device[0]","property":"unavailable-features"} > > but in SGX vm, since the sgx is initialized before VCPU because sgx need set the virtual EPC info in the cpuid. > > So the /machine/unattached/device[0] is occupied by sgx, which fail to get the unvailable-features from > /machine/unattached/device[0]. > > > We need fix this issue, but this can be done in Qemu or Libvirt side. > > 1) Libvirt side > If the libvirt support SGX EPCs, libvirt can use /machine/unattached/device[n] to check "unavailable-features". > n is the next number of sgx's unattached_count. > > 2) Qemu side > > One temp patch to create one /sgx in the /machine in the device_set_realized() > diff --git a/hw/core/qdev.c b/hw/core/qdev.c > index 84f3019440..4154eef0d8 100644 > --- a/hw/core/qdev.c > +++ b/hw/core/qdev.c > @@ -497,7 +497,7 @@ static void device_set_realized(Object *obj, bool value, Error **errp) > NamedClockList *ncl; > Error *local_err = NULL; > bool unattached_parent = false; > - static int unattached_count; > + static int unattached_count, sgx_count; > > if (dev->hotplugged && !dc->hotpluggable) { > error_setg(errp, QERR_DEVICE_NO_HOTPLUG, object_get_typename(obj)); > @@ -509,7 +509,15 @@ static void device_set_realized(Object *obj, bool value, Error **errp) > goto fail; > } > > - if (!obj->parent) { > + if (!obj->parent && !strcmp(object_get_typename(obj), "sgx-epc")) { > + gchar *name = g_strdup_printf("device[%d]", sgx_count++); > + > + object_property_add_child(container_get(qdev_get_machine(), > + "/sgx"), > + name, obj); > + unattached_parent = true; > + g_free(name); > + } else if (!obj->parent) { > gchar *name = g_strdup_printf("device[%d]", unattached_count++); > > object_property_add_child(container_get(qdev_get_machine() > > This patch can make sure vcpu is still /machine/unattached/device[0]. > > > Which solution is best? thanks! Has either of the fixes reached yet reached upstream or not? > Yang BR, Jarkko