From patchwork Tue Mar 6 12:55:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 10261603 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5CBFE6037E for ; Tue, 6 Mar 2018 13:00:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4CBA428C06 for ; Tue, 6 Mar 2018 13:00:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4196C28F32; Tue, 6 Mar 2018 13:00:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E5D8F28C06 for ; Tue, 6 Mar 2018 13:00:17 +0000 (UTC) Received: from localhost ([::1]:55287 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1etCCX-0003v7-4Z for patchwork-qemu-devel@patchwork.kernel.org; Tue, 06 Mar 2018 08:00:17 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41416) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1etC8A-0008TV-1O for qemu-devel@nongnu.org; Tue, 06 Mar 2018 07:55:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1etC84-0004rX-4v for qemu-devel@nongnu.org; Tue, 06 Mar 2018 07:55:46 -0500 Received: from orth.archaic.org.uk ([2001:8b0:1d0::2]:46810) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1etC81-0004jX-Sj; Tue, 06 Mar 2018 07:55:38 -0500 Received: from pm215 by orth.archaic.org.uk with local (Exim 4.89) (envelope-from ) id 1etC7v-0004Wn-Mg; Tue, 06 Mar 2018 12:55:31 +0000 From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Date: Tue, 6 Mar 2018 12:55:26 +0000 Message-Id: <20180306125526.27838-7-peter.maydell@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180306125526.27838-1-peter.maydell@linaro.org> References: <20180306125526.27838-1-peter.maydell@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2001:8b0:1d0::2 Subject: [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Support -machine gic-version=max 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: Igor Mammedov , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , patches@linaro.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add support for passing 'max' to -machine gic-version. By analogy with the -cpu max option, this picks the "best available" GIC version whether you're using KVM or TCG, so it behaves like 'host' when using KVM, and gives you GICv3 when using TCG. Also like '-cpu host', using -machine gic-version=max' means there is no guarantee of migration compatibility between QEMU versions; in future 'max' might mean '4'. Signed-off-by: Peter Maydell --- hw/arm/virt.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index cda4b83586..2c07245047 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1207,16 +1207,23 @@ static void machvirt_init(MachineState *machine) /* We can probe only here because during property set * KVM is not available yet */ - if (!vms->gic_version) { + if (vms->gic_version <= 0) { + /* "host" or "max" */ if (!kvm_enabled()) { - error_report("gic-version=host requires KVM"); - exit(1); - } - - vms->gic_version = kvm_arm_vgic_probe(); - if (!vms->gic_version) { - error_report("Unable to determine GIC version supported by host"); - exit(1); + if (vms->gic_version == 0) { + error_report("gic-version=host requires KVM"); + exit(1); + } else { + /* "max": currently means 3 for TCG */ + vms->gic_version = 3; + } + } else { + vms->gic_version = kvm_arm_vgic_probe(); + if (!vms->gic_version) { + error_report( + "Unable to determine GIC version supported by host"); + exit(1); + } } } @@ -1480,9 +1487,11 @@ static void virt_set_gic_version(Object *obj, const char *value, Error **errp) vms->gic_version = 2; } else if (!strcmp(value, "host")) { vms->gic_version = 0; /* Will probe later */ + } else if (!strcmp(value, "max")) { + vms->gic_version = -1; /* Will probe later */ } else { error_setg(errp, "Invalid gic-version value"); - error_append_hint(errp, "Valid values are 3, 2, host.\n"); + error_append_hint(errp, "Valid values are 3, 2, host, max.\n"); } }