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Tue, 28 Mar 2023 15:59:39 +0000 From: Eric DeVolder To: shannon.zhaosl@gmail.com, mst@redhat.com, imammedo@redhat.com, ani@anisinha.ca, peter.maydell@linaro.org, qemu-arm@nongnu.org, qemu-devel@nongnu.org, marcel.apfelbaum@gmail.com, pbonzini@redhat.com, richard.henderson@linaro.org, eduardo@habkost.net Cc: boris.ostrovsky@oracle.com, eric.devolder@oracle.com Subject: [PATCH 2/2] hw/acpi: i386: bump MADT to revision 5 Date: Tue, 28 Mar 2023 11:59:26 -0400 Message-Id: <20230328155926.2277-3-eric.devolder@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230328155926.2277-1-eric.devolder@oracle.com> References: <20230328155926.2277-1-eric.devolder@oracle.com> X-ClientProxiedBy: SA0PR11CA0074.namprd11.prod.outlook.com (2603:10b6:806:d2::19) To CO1PR10MB4531.namprd10.prod.outlook.com (2603:10b6:303:6c::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR10MB4531:EE_|PH0PR10MB4486:EE_ X-MS-Office365-Filtering-Correlation-Id: dc28bd9d-65e9-4ba2-9576-08db2fa56fc9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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envelope-from=eric.devolder@oracle.com; helo=mx0b-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_H2=-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 Currently i386 QEMU generates MADT revision 3, and reports MADT revision 1. ACPI 6.3 introduces MADT revision 5. For MADT revision 4, that introduces ARM GIC structures, which do not apply to i386. For MADT revision 5, the Local APIC flags introduces the Online Capable bitfield. Making MADT generate and report revision 5 will solve problems with CPU hotplug (the Online Capable flag indicates hotpluggable CPUs). Signed-off-by: Eric DeVolder --- hw/i386/acpi-common.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/hw/i386/acpi-common.c b/hw/i386/acpi-common.c index 52e5c1439a..1e3a13a36c 100644 --- a/hw/i386/acpi-common.c +++ b/hw/i386/acpi-common.c @@ -38,8 +38,15 @@ void pc_madt_cpu_entry(int uid, const CPUArchIdList *apic_ids, { uint32_t apic_id = apic_ids->cpus[uid].arch_id; /* Flags – Local APIC Flags */ - uint32_t flags = apic_ids->cpus[uid].cpu != NULL || force_enabled ? - 1 /* Enabled */ : 0; + bool enabled = apic_ids->cpus[uid].cpu != NULL || force_enabled ? + true /* Enabled */ : false; + /* + * ACPI 6.3 5.2.12.2 Local APIC Flags: OnlineCapable must be 0 + * if Enabled is set. + */ + bool onlinecapable = enabled ? false : true; /* Online Capable */ + uint32_t flags = onlinecapable ? 0x2 : 0x0 | + enabled ? 0x1 : 0x0; /* ACPI spec says that LAPIC entry for non present * CPU may be omitted from MADT or it must be marked @@ -102,7 +109,7 @@ void acpi_build_madt(GArray *table_data, BIOSLinker *linker, MachineClass *mc = MACHINE_GET_CLASS(x86ms); const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms)); AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(adev); - AcpiTable table = { .sig = "APIC", .rev = 1, .oem_id = oem_id, + AcpiTable table = { .sig = "APIC", .rev = 5, .oem_id = oem_id, .oem_table_id = oem_table_id }; acpi_table_begin(&table, table_data);