From patchwork Wed Mar 30 14:57:46 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Maydell X-Patchwork-Id: 8697591 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E7E04C0553 for ; Wed, 30 Mar 2016 15:00:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1945620383 for ; Wed, 30 Mar 2016 15:00:08 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 02E7520142 for ; Wed, 30 Mar 2016 15:00:07 +0000 (UTC) Received: from localhost ([::1]:54588 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alHbK-0008Gz-F8 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 30 Mar 2016 11:00:06 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52725) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alHZJ-0004hG-D3 for qemu-devel@nongnu.org; Wed, 30 Mar 2016 10:58:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1alHZH-00053K-NB for qemu-devel@nongnu.org; Wed, 30 Mar 2016 10:58:01 -0400 Received: from orth.archaic.org.uk ([2001:8b0:1d0::2]:56293) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alHZH-00050z-ER for qemu-devel@nongnu.org; Wed, 30 Mar 2016 10:57:59 -0400 Received: from pm215 by orth.archaic.org.uk with local (Exim 4.84_2) (envelope-from ) id 1alHZE-0001Cd-Hx for qemu-devel@nongnu.org; Wed, 30 Mar 2016 15:57:56 +0100 From: Peter Maydell To: qemu-devel@nongnu.org Date: Wed, 30 Mar 2016 15:57:46 +0100 Message-Id: <1459349869-25448-15-git-send-email-peter.maydell@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1459349869-25448-1-git-send-email-peter.maydell@linaro.org> References: <1459349869-25448-1-git-send-email-peter.maydell@linaro.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:8b0:1d0::2 Subject: [Qemu-devel] [PULL 14/17] arm: qmp: add query-gic-capabilities interface X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Peter Xu This patch add "query-gic-capabilities" but does not implement it. The command is ARM-only. The command will return a list of GICCapability structs that describes all GIC versions that current QEMU and system support. Libvirt is possibly the first consumer of this new command. Before this patch, a libvirt user can successfully configure all kinds of GIC devices for ARM guests, no matter whether current QEMU/kernel supports them. If the specified GIC version/type is not supported, the user will get an ambiguous "QEMU boot failure" error when trying to start the VM. This is not user-friendly. With this patch, libvirt should be able to query which type (and which version) of GIC device is supported. Using this information, libvirt can warn the user during configuration of guests when specified GIC device type is not supported. Or better, we can just list those versions that we support, and filter out the unsupported ones. For example, if we got the query result: {"return": [{"emulated": false, "version": 3, "kernel": true}, {"emulated": true, "version": 2, "kernel": false}]} then it means that we support emulated GIC version 2 using: qemu-system-aarch64 -M virt,accel=tcg,gic-version=2 ... or KVM-accelerated GIC version 3 using: qemu-system-aarch64 -M virt,accel=kvm,gic-version=3 ... If we specify other explicit GIC versions rather than the above, QEMU will not be able to boot. The community is working on a more generic way to query these kinds of information about valid values of machine properties. However, due to the importance of supporting this specific use case, weecided to first implement this ad-hoc one; then when the generic method is ready, we can move on to that one smoothly. Signed-off-by: Peter Xu Reviewed-by: Eric Blake Message-id: 1458788142-17509-2-git-send-email-peterx@redhat.com [PMM: tweaked commit message a bit] Signed-off-by: Peter Maydell --- monitor.c | 8 ++++++++ qapi-schema.json | 36 ++++++++++++++++++++++++++++++++++++ qmp-commands.hx | 27 +++++++++++++++++++++++++++ target-arm/Makefile.objs | 2 +- target-arm/monitor.c | 28 ++++++++++++++++++++++++++++ 5 files changed, 100 insertions(+), 1 deletion(-) create mode 100644 target-arm/monitor.c diff --git a/monitor.c b/monitor.c index 955ed35..d1c1930 100644 --- a/monitor.c +++ b/monitor.c @@ -4259,3 +4259,11 @@ void qmp_dump_skeys(const char *filename, Error **errp) error_setg(errp, QERR_FEATURE_DISABLED, "dump-skeys"); } #endif + +#ifndef TARGET_ARM +GICCapabilityList *qmp_query_gic_capabilities(Error **errp) +{ + error_setg(errp, QERR_FEATURE_DISABLED, "query-gic-capabilities"); + return NULL; +} +#endif diff --git a/qapi-schema.json b/qapi-schema.json index 8907790..e58f6a9 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -4134,3 +4134,39 @@ ## { 'enum': 'ReplayMode', 'data': [ 'none', 'record', 'play' ] } + +## +# @GICCapability: +# +# The struct describes capability for a specific GIC (Generic +# Interrupt Controller) version. These bits are not only decided by +# QEMU/KVM software version, but also decided by the hardware that +# the program is running upon. +# +# @version: version of GIC to be described. Currently, only 2 and 3 +# are supported. +# +# @emulated: whether current QEMU/hardware supports emulated GIC +# device in user space. +# +# @kernel: whether current QEMU/hardware supports hardware +# accelerated GIC device in kernel. +# +# Since: 2.6 +## +{ 'struct': 'GICCapability', + 'data': { 'version': 'int', + 'emulated': 'bool', + 'kernel': 'bool' } } + +## +# @query-gic-capabilities: +# +# This command is ARM-only. It will return a list of GICCapability +# objects that describe its capability bits. +# +# Returns: a list of GICCapability objects. +# +# Since: 2.6 +## +{ 'command': 'query-gic-capabilities', 'returns': ['GICCapability'] } diff --git a/qmp-commands.hx b/qmp-commands.hx index 9e05365..de896a5 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -4853,3 +4853,30 @@ Example: {"type": 0, "out-pport": 0, "pport": 0, "vlan-id": 3840, "pop-vlan": 1, "id": 251658240} ]} + +EQMP + +#if defined TARGET_ARM + { + .name = "query-gic-capabilities", + .args_type = "", + .mhandler.cmd_new = qmp_marshal_query_gic_capabilities, + }, +#endif + +SQMP +query-gic-capabilities +--------------- + +Return a list of GICCapability objects, describing supported GIC +(Generic Interrupt Controller) versions. + +Arguments: None + +Example: + +-> { "execute": "query-gic-capabilities" } +<- { "return": [{ "version": 2, "emulated": true, "kernel": false }, + { "version": 3, "emulated": false, "kernel": true } ] } + +EQMP diff --git a/target-arm/Makefile.objs b/target-arm/Makefile.objs index a80eb39..334074c 100644 --- a/target-arm/Makefile.objs +++ b/target-arm/Makefile.objs @@ -8,4 +8,4 @@ obj-y += translate.o op_helper.o helper.o cpu.o obj-y += neon_helper.o iwmmxt_helper.o obj-y += gdbstub.o obj-$(TARGET_AARCH64) += cpu64.o translate-a64.o helper-a64.o gdbstub64.o -obj-y += crypto_helper.o +obj-y += crypto_helper.o monitor.o diff --git a/target-arm/monitor.c b/target-arm/monitor.c new file mode 100644 index 0000000..4c9bef3 --- /dev/null +++ b/target-arm/monitor.c @@ -0,0 +1,28 @@ +/* + * QEMU monitor.c for ARM. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qmp-commands.h" + +GICCapabilityList *qmp_query_gic_capabilities(Error **errp) +{ + return NULL; +}