From ac35f13ba8f80533b21016ced01aa55891952251 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Wed, 20 Apr 2016 11:28:57 +0200 Subject: pc: acpi: introduce AcpiDeviceIfClass.madt_cpu hook Add madt_cpu callback to AcpiDeviceIfClass and use it for generating LAPIC MADT entries for CPUs. Later it will be used for generating x2APIC entries in case of more than 255 CPUs and also would be reused by ARM target when ACPI CPU hotplug is introduced there. Signed-off-by: Igor Mammedov Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/acpi/piix4.c | 1 + hw/i386/acpi-build.c | 45 +++++++++++++++++++++++++++------------------ hw/isa/lpc_ich9.c | 1 + 3 files changed, 29 insertions(+), 18 deletions(-) (limited to 'hw') diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c index 6351d2e..6d24cb5 100644 --- a/hw/acpi/piix4.c +++ b/hw/acpi/piix4.c @@ -658,6 +658,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data) hc->unplug = piix4_device_unplug_cb; adevc->ospm_status = piix4_ospm_status; adevc->send_event = piix4_send_gpe; + adevc->madt_cpu = pc_madt_cpu_entry; } static const TypeInfo piix4_pm_info = { diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index b3dc1df..e35a446 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -329,12 +329,38 @@ build_fadt(GArray *table_data, BIOSLinker *linker, AcpiPmInfo *pm, (void *)fadt, "FACP", sizeof(*fadt), 1, oem_id, oem_table_id); } +void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid, + CPUArchIdList *apic_ids, GArray *entry) +{ + int apic_id; + AcpiMadtProcessorApic *apic = acpi_data_push(entry, sizeof *apic); + + apic_id = apic_ids->cpus[uid].arch_id; + apic->type = ACPI_APIC_PROCESSOR; + apic->length = sizeof(*apic); + apic->processor_id = uid; + apic->local_apic_id = apic_id; + if (apic_ids->cpus[uid].cpu != NULL) { + apic->flags = cpu_to_le32(1); + } else { + /* ACPI spec says that LAPIC entry for non present + * CPU may be omitted from MADT or it must be marked + * as disabled. However omitting non present CPU from + * MADT breaks hotplug on linux. So possible CPUs + * should be put in MADT but kept disabled. + */ + apic->flags = cpu_to_le32(0); + } +} + static void build_madt(GArray *table_data, BIOSLinker *linker, PCMachineState *pcms) { MachineClass *mc = MACHINE_GET_CLASS(pcms); CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(pcms)); int madt_start = table_data->len; + AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(pcms->acpi_dev); + AcpiDeviceIf *adev = ACPI_DEVICE_IF(pcms->acpi_dev); AcpiMultipleApicTable *madt; AcpiMadtIoApic *io_apic; @@ -347,24 +373,7 @@ build_madt(GArray *table_data, BIOSLinker *linker, PCMachineState *pcms) madt->flags = cpu_to_le32(1); for (i = 0; i < apic_ids->len; i++) { - AcpiMadtProcessorApic *apic = acpi_data_push(table_data, sizeof *apic); - int apic_id = apic_ids->cpus[i].arch_id; - - apic->type = ACPI_APIC_PROCESSOR; - apic->length = sizeof(*apic); - apic->processor_id = i; - apic->local_apic_id = apic_id; - if (apic_ids->cpus[i].cpu != NULL) { - apic->flags = cpu_to_le32(1); - } else { - /* ACPI spec says that LAPIC entry for non present - * CPU may be omitted from MADT or it must be marked - * as disabled. However omitting non present CPU from - * MADT breaks hotplug on linux. So possible CPUs - * should be put in MADT but kept disabled. - */ - apic->flags = cpu_to_le32(0); - } + adevc->madt_cpu(adev, i, apic_ids, table_data); } g_free(apic_ids); diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c index 213741b..c1a4f1b 100644 --- a/hw/isa/lpc_ich9.c +++ b/hw/isa/lpc_ich9.c @@ -714,6 +714,7 @@ static void ich9_lpc_class_init(ObjectClass *klass, void *data) hc->unplug = ich9_pm_device_unplug_cb; adevc->ospm_status = ich9_pm_ospm_status; adevc->send_event = ich9_send_gpe; + adevc->madt_cpu = pc_madt_cpu_entry; } static const TypeInfo ich9_lpc_info = { -- cgit v1.1