From: Philippe Mathieu-Daudé <philmd@linaro.org> Now all PC & Q35 machiens are using modern hotplug from the beginning, and all legacy_cpu_hotplug flags keep false during runtime. So it's safe to remove legacy_cpu_hotplug flags and related properties, with unused gpe_cpu field. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Zhao Liu <zhao1.liu@intel.com> --- Changes since v4: * Referring Igor's v5 [*], drop gpe_cpu field and does not only remove build_legacy_cpu_hotplug_aml(), but instead remove the entire cpu_hotplug.c file in a separate patch. [*]: https://lore.kernel.org/qemu-devel/20251031142825.179239-1-imammedo@redhat.c... --- hw/acpi/ich9.c | 40 ++++------------------------------------ hw/acpi/piix4.c | 40 ++++------------------------------------ hw/i386/acpi-build.c | 4 +--- include/hw/acpi/ich9.h | 2 -- include/hw/acpi/piix4.h | 2 -- include/hw/i386/pc.h | 3 --- 6 files changed, 9 insertions(+), 82 deletions(-) diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c index 54590129c695..f254f3879716 100644 --- a/hw/acpi/ich9.c +++ b/hw/acpi/ich9.c @@ -339,26 +339,6 @@ static void ich9_pm_get_gpe0_blk(Object *obj, Visitor *v, const char *name, visit_type_uint32(v, name, &value, errp); } -static bool ich9_pm_get_cpu_hotplug_legacy(Object *obj, Error **errp) -{ - ICH9LPCState *s = ICH9_LPC_DEVICE(obj); - - return s->pm.cpu_hotplug_legacy; -} - -static void ich9_pm_set_cpu_hotplug_legacy(Object *obj, bool value, - Error **errp) -{ - ICH9LPCState *s = ICH9_LPC_DEVICE(obj); - - assert(!value); - if (s->pm.cpu_hotplug_legacy && value == false) { - acpi_switch_to_modern_cphp(&s->pm.gpe_cpu, &s->pm.cpuhp_state, - ICH9_CPU_HOTPLUG_IO_BASE); - } - s->pm.cpu_hotplug_legacy = value; -} - static bool ich9_pm_get_enable_tco(Object *obj, Error **errp) { ICH9LPCState *s = ICH9_LPC_DEVICE(obj); @@ -403,7 +383,6 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm) { static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN; pm->acpi_memory_hotplug.is_enabled = true; - pm->cpu_hotplug_legacy = false; pm->disable_s3 = 0; pm->disable_s4 = 0; pm->s4_val = 2; @@ -422,9 +401,6 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm) NULL, NULL, pm); object_property_add_uint32_ptr(obj, ACPI_PM_PROP_GPE0_BLK_LEN, &gpe0_len, OBJ_PROP_FLAG_READ); - object_property_add_bool(obj, "cpu-hotplug-legacy", - ich9_pm_get_cpu_hotplug_legacy, - ich9_pm_set_cpu_hotplug_legacy); object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S3_DISABLED, &pm->disable_s3, OBJ_PROP_FLAG_READWRITE); object_property_add_uint8_ptr(obj, ACPI_PM_PROP_S4_DISABLED, @@ -477,11 +453,7 @@ void ich9_pm_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, dev, errp); } } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { - if (lpc->pm.cpu_hotplug_legacy) { - legacy_acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.gpe_cpu, dev, errp); - } else { - acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.cpuhp_state, dev, errp); - } + acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.cpuhp_state, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { acpi_pcihp_device_plug_cb(hotplug_dev, &lpc->pm.acpi_pci_hotplug, dev, errp); @@ -500,8 +472,7 @@ void ich9_pm_device_unplug_request_cb(HotplugHandler *hotplug_dev, acpi_memory_unplug_request_cb(hotplug_dev, &lpc->pm.acpi_memory_hotplug, dev, errp); - } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) && - !lpc->pm.cpu_hotplug_legacy) { + } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { uint64_t negotiated = lpc->smi_negotiated_features; if (negotiated & BIT_ULL(ICH9_LPC_SMI_F_BROADCAST_BIT) && @@ -533,8 +504,7 @@ void ich9_pm_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { acpi_memory_unplug_cb(&lpc->pm.acpi_memory_hotplug, dev, errp); - } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) && - !lpc->pm.cpu_hotplug_legacy) { + } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { acpi_cpu_unplug_cb(&lpc->pm.cpuhp_state, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { acpi_pcihp_device_unplug_cb(hotplug_dev, &lpc->pm.acpi_pci_hotplug, @@ -556,7 +526,5 @@ void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list) ICH9LPCState *s = ICH9_LPC_DEVICE(adev); acpi_memory_ospm_status(&s->pm.acpi_memory_hotplug, list); - if (!s->pm.cpu_hotplug_legacy) { - acpi_cpu_ospm_status(&s->pm.cpuhp_state, list); - } + acpi_cpu_ospm_status(&s->pm.cpuhp_state, list); } diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c index a7a29b0d09a9..6ad5f1d1c19d 100644 --- a/hw/acpi/piix4.c +++ b/hw/acpi/piix4.c @@ -336,11 +336,7 @@ static void piix4_device_plug_cb(HotplugHandler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { acpi_pcihp_device_plug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { - if (s->cpu_hotplug_legacy) { - legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, dev, errp); - } else { - acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp); - } + acpi_cpu_plug_cb(hotplug_dev, &s->cpuhp_state, dev, errp); } else { g_assert_not_reached(); } @@ -358,8 +354,7 @@ static void piix4_device_unplug_request_cb(HotplugHandler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { acpi_pcihp_device_unplug_request_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp); - } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) && - !s->cpu_hotplug_legacy) { + } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { acpi_cpu_unplug_request_cb(hotplug_dev, &s->cpuhp_state, dev, errp); } else { error_setg(errp, "acpi: device unplug request for not supported device" @@ -378,8 +373,7 @@ static void piix4_device_unplug_cb(HotplugHandler *hotplug_dev, } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { acpi_pcihp_device_unplug_cb(hotplug_dev, &s->acpi_pci_hotplug, dev, errp); - } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU) && - !s->cpu_hotplug_legacy) { + } else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { acpi_cpu_unplug_cb(&s->cpuhp_state, dev, errp); } else { error_setg(errp, "acpi: device unplug for not supported device" @@ -523,26 +517,6 @@ static const MemoryRegionOps piix4_gpe_ops = { .endianness = DEVICE_LITTLE_ENDIAN, }; - -static bool piix4_get_cpu_hotplug_legacy(Object *obj, Error **errp) -{ - PIIX4PMState *s = PIIX4_PM(obj); - - return s->cpu_hotplug_legacy; -} - -static void piix4_set_cpu_hotplug_legacy(Object *obj, bool value, Error **errp) -{ - PIIX4PMState *s = PIIX4_PM(obj); - - assert(!value); - if (s->cpu_hotplug_legacy && value == false) { - acpi_switch_to_modern_cphp(&s->gpe_cpu, &s->cpuhp_state, - PIIX4_CPU_HOTPLUG_IO_BASE); - } - s->cpu_hotplug_legacy = value; -} - static void piix4_acpi_system_hot_add_init(MemoryRegion *parent, PCIBus *bus, PIIX4PMState *s) { @@ -558,10 +532,6 @@ static void piix4_acpi_system_hot_add_init(MemoryRegion *parent, qbus_set_hotplug_handler(BUS(pci_get_bus(PCI_DEVICE(s))), OBJECT(s)); } - s->cpu_hotplug_legacy = false; - object_property_add_bool(OBJECT(s), "cpu-hotplug-legacy", - piix4_get_cpu_hotplug_legacy, - piix4_set_cpu_hotplug_legacy); cpu_hotplug_hw_init(parent, OBJECT(s), &s->cpuhp_state, PIIX4_CPU_HOTPLUG_IO_BASE); @@ -576,9 +546,7 @@ static void piix4_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list) PIIX4PMState *s = PIIX4_PM(adev); acpi_memory_ospm_status(&s->acpi_memory_hotplug, list); - if (!s->cpu_hotplug_legacy) { - acpi_cpu_ospm_status(&s->cpuhp_state, list); - } + acpi_cpu_ospm_status(&s->cpuhp_state, list); } static void piix4_send_gpe(AcpiDeviceIf *adev, AcpiEventStatusBits ev) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 23147ddc25e7..bf7ed2e50837 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -960,9 +960,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, } aml_append(dsdt, scope); - if (pcmc->legacy_cpu_hotplug) { - build_legacy_cpu_hotplug_aml(dsdt, machine, pm->cpu_hp_io_base); - } else { + { CPUHotplugFeatures opts = { .acpi_1_compatible = true, .smi_path = pm->smi_on_cpuhp ? "\\_SB.PCI0.SMI0.SMIC" : NULL, diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h index 245fe08dc245..6a21472eb32e 100644 --- a/include/hw/acpi/ich9.h +++ b/include/hw/acpi/ich9.h @@ -53,8 +53,6 @@ typedef struct ICH9LPCPMRegs { uint32_t pm_io_base; Notifier powerdown_notifier; - bool cpu_hotplug_legacy; - AcpiCpuHotplug gpe_cpu; CPUHotplugState cpuhp_state; bool keep_pci_slot_hpc; diff --git a/include/hw/acpi/piix4.h b/include/hw/acpi/piix4.h index eb1c122d8069..e075f0cbeaf1 100644 --- a/include/hw/acpi/piix4.h +++ b/include/hw/acpi/piix4.h @@ -63,8 +63,6 @@ struct PIIX4PMState { uint8_t disable_s4; uint8_t s4_val; - bool cpu_hotplug_legacy; - AcpiCpuHotplug gpe_cpu; CPUHotplugState cpuhp_state; MemHotplugState acpi_memory_hotplug; diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index e83157ab358f..698e3fb84af0 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -110,9 +110,6 @@ struct PCMachineClass { bool enforce_amd_1tb_hole; bool isa_bios_alias; - /* generate legacy CPU hotplug AML */ - bool legacy_cpu_hotplug; - /* use PVH to load kernels that support this feature */ bool pvh_enabled; -- 2.34.1