From patchwork Wed Jan 4 11:51:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 13088507 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 5C4ACC54EBE for ; Wed, 4 Jan 2023 11:51:59 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pD2J5-0007bN-Tx; Wed, 04 Jan 2023 06:51:43 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pD2J4-0007b7-QC; Wed, 04 Jan 2023 06:51:42 -0500 Received: from mail.ozlabs.org ([2404:9400:2221:ea00::3] helo=gandalf.ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pD2J3-0002QT-5Y; Wed, 04 Jan 2023 06:51:42 -0500 Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4Nn7HB37l9z4y0g; Wed, 4 Jan 2023 22:51:34 +1100 (AEDT) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Nn7H72mzdz4y0B; Wed, 4 Jan 2023 22:51:31 +1100 (AEDT) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: qemu-s390x@nongnu.org Cc: qemu-devel@nongnu.org, Thomas Huth , Halil Pasic , Christian Borntraeger , Richard Henderson , David Hildenbrand , Ilya Leoshkevich , Eric Farman , =?utf-8?q?C=C3=A9dric_Le_Goater?= Subject: [PATCH 3/5] s390x/pv: Check for support on the host Date: Wed, 4 Jan 2023 12:51:09 +0100 Message-Id: <20230104115111.3240594-4-clg@kaod.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230104115111.3240594-1-clg@kaod.org> References: <20230104115111.3240594-1-clg@kaod.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2404:9400:2221:ea00::3; envelope-from=SRS0=6L6x=5B=kaod.org=clg@ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -39 X-Spam_score: -4.0 X-Spam_bar: ---- X-Spam_report: (-4.0 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-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: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Cédric Le Goater Support for protected VMs should have been enabled on the host with the kernel parameter 'prot_virt=1'. If the hardware supports the feature, it is reflected under sysfs. Signed-off-by: Cédric Le Goater Reviewed-by: Thomas Huth --- hw/s390x/pv.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c index 3a7ec70634..8d0d3f4adc 100644 --- a/hw/s390x/pv.c +++ b/hw/s390x/pv.c @@ -14,6 +14,7 @@ #include #include "qapi/error.h" +#include "qemu/cutils.h" #include "qemu/error-report.h" #include "sysemu/kvm.h" #include "qom/object_interfaces.h" @@ -281,9 +282,29 @@ static bool s390_pv_check_cpus(Error **errp) return true; } +#define S390_PV_HOST "/sys/firmware/uv/prot_virt_host" + +static bool s390_pv_check_host(Error **errp) +{ + gchar *s = NULL; + uint64_t pv_host = 0; + + if (g_file_get_contents(S390_PV_HOST, &s, NULL, NULL)) { + pv_host = g_ascii_strtoull(s, NULL, 10); + } + g_free(s); + + if (pv_host != 1) { + error_setg(errp, "Host does not support protected VMs"); + return false; + } + + return true; +} + static bool s390_pv_guest_check(const Object *obj, Error **errp) { - return s390_pv_check_cpus(errp); + return s390_pv_check_cpus(errp) && s390_pv_check_host(errp); } OBJECT_DEFINE_TYPE_WITH_INTERFACES(S390PVGuest,