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Thu, 26 Oct 2023 21:26:14 +0000 From: Dongli Zhang To: qemu-devel@nongnu.org Cc: philmd@linaro.org, armbru@redhat.com, thuth@redhat.com, quintela@redhat.com, kkostiuk@redhat.com, berrange@redhat.com, dwmw@amazon.co.uk, pbonzini@redhat.com, joe.jin@oracle.com Subject: [PATCH v3 1/1] hmp: synchronize cpu state for lapic info Date: Thu, 26 Oct 2023 14:19:38 -0700 Message-Id: <20231026211938.162815-1-dongli.zhang@oracle.com> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: BY5PR03CA0028.namprd03.prod.outlook.com (2603:10b6:a03:1e0::38) To BYAPR10MB2663.namprd10.prod.outlook.com (2603:10b6:a02:a9::20) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR10MB2663:EE_|SN4PR10MB5542:EE_ X-MS-Office365-Filtering-Correlation-Id: 48d3e5e1-839a-4460-70b8-08dbd66a2e8b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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envelope-from=dongli.zhang@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org While the default "info lapic" always synchronizes cpu state ... mon_get_cpu() -> mon_get_cpu_sync(mon, true) -> cpu_synchronize_state(cpu) -> ioctl KVM_GET_LAPIC (taking KVM as example) ... the cpu state is not synchronized when the apic-id is available as argument. The cpu state should be synchronized when apic-id is available. Otherwise the "info lapic " always returns stale data. Reference: https://lore.kernel.org/all/20211028155457.967291-19-berrange@redhat.com/ Cc: Joe Jin Signed-off-by: Dongli Zhang Reviewed-by: Daniel P. Berrangé Reviewed-by: David Woodhouse Reviewed-by: Juan Quintela --- Changed since v1: - I sent out wrong patch version in v1 Changed since v2: - Add the Reviewed-by from Daniel and David target/i386/monitor.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/target/i386/monitor.c b/target/i386/monitor.c index 6512846327..d727270fd0 100644 --- a/target/i386/monitor.c +++ b/target/i386/monitor.c @@ -28,6 +28,7 @@ #include "monitor/hmp-target.h" #include "monitor/hmp.h" #include "qapi/qmp/qdict.h" +#include "sysemu/hw_accel.h" #include "sysemu/kvm.h" #include "qapi/error.h" #include "qapi/qapi-commands-misc-target.h" @@ -654,7 +655,11 @@ void hmp_info_local_apic(Monitor *mon, const QDict *qdict) if (qdict_haskey(qdict, "apic-id")) { int id = qdict_get_try_int(qdict, "apic-id", 0); + cs = cpu_by_arch_id(id); + if (cs) { + cpu_synchronize_state(cs); + } } else { cs = mon_get_cpu(mon); }