From fe8adae3455c3e43473bc23b00d257f6d41d24c3 Mon Sep 17 00:00:00 2001 From: Ani Sinha Date: Thu, 12 Aug 2021 12:44:09 +0530 Subject: [PATCH] hw/acpi: refactor acpi hp modules so that targets can just use what they need Currently various acpi hotplug modules like cpu hotplug, memory hotplug, pci hotplug, nvdimm hotplug are all pulled in when CONFIG_ACPI_X86 is turned on. This brings in support for whole lot of subsystems that some targets like mips does not need. They are added just to satisfy symbol dependencies. This is ugly and should be avoided. Targets should be able to pull in just what they need and no more. For example, mips only needs support for PIIX4 and does not need acpi pci hotplug support or cpu hotplug support or memory hotplug support etc. This change is an effort to clean this up. In this change, new config variables are added for various acpi hotplug subsystems. Targets like mips can only enable PIIX4 support and not the rest of all the other modules which were being previously pulled in as a part of CONFIG_ACPI_X86. Function stubs make sure that symbols which piix4 needs but are not required by mips (for example, symbols specific to pci hotplug etc) are available to satisfy the dependencies. Currently, this change only addresses issues with mips malta targets. In future we might be able to clean up other targets which are similarly pulling in lot of unnecessary hotplug modules by enabling ACPI_X86. This change should also address issues such as the following: https://gitlab.com/qemu-project/qemu/-/issues/221 https://gitlab.com/qemu-project/qemu/-/issues/193 Signed-off-by: Ani Sinha Message-Id: <20210812071409.492299-1-ani@anisinha.ca> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- configs/devices/mips-softmmu/common.mak | 5 +-- hw/acpi/Kconfig | 10 +++++ hw/acpi/acpi-cpu-hotplug-stub.c | 50 +++++++++++++++++++++++++ hw/acpi/acpi-mem-hotplug-stub.c | 35 +++++++++++++++++ hw/acpi/acpi-nvdimm-stub.c | 8 ++++ hw/acpi/acpi-pci-hotplug-stub.c | 47 +++++++++++++++++++++++ hw/acpi/meson.build | 14 +++++-- 7 files changed, 161 insertions(+), 8 deletions(-) create mode 100644 hw/acpi/acpi-cpu-hotplug-stub.c create mode 100644 hw/acpi/acpi-mem-hotplug-stub.c create mode 100644 hw/acpi/acpi-nvdimm-stub.c create mode 100644 hw/acpi/acpi-pci-hotplug-stub.c diff --git a/configs/devices/mips-softmmu/common.mak b/configs/devices/mips-softmmu/common.mak index ea78fe7275..752b62b1e6 100644 --- a/configs/devices/mips-softmmu/common.mak +++ b/configs/devices/mips-softmmu/common.mak @@ -18,10 +18,7 @@ CONFIG_PCSPK=y CONFIG_PCKBD=y CONFIG_FDC=y CONFIG_ACPI=y -CONFIG_ACPI_X86=y -CONFIG_ACPI_MEMORY_HOTPLUG=y -CONFIG_ACPI_NVDIMM=y -CONFIG_ACPI_CPU_HOTPLUG=y +CONFIG_ACPI_PIIX4=y CONFIG_APM=y CONFIG_I8257=y CONFIG_PIIX4=y diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig index cfc4ede8d9..3b5e118c54 100644 --- a/hw/acpi/Kconfig +++ b/hw/acpi/Kconfig @@ -8,6 +8,8 @@ config ACPI_X86 select ACPI_CPU_HOTPLUG select ACPI_MEMORY_HOTPLUG select ACPI_HMAT + select ACPI_PIIX4 + select ACPI_PCIHP config ACPI_X86_ICH bool @@ -24,6 +26,14 @@ config ACPI_NVDIMM bool depends on ACPI +config ACPI_PIIX4 + bool + depends on ACPI + +config ACPI_PCIHP + bool + depends on ACPI + config ACPI_HMAT bool depends on ACPI diff --git a/hw/acpi/acpi-cpu-hotplug-stub.c b/hw/acpi/acpi-cpu-hotplug-stub.c new file mode 100644 index 0000000000..3fc4b14c26 --- /dev/null +++ b/hw/acpi/acpi-cpu-hotplug-stub.c @@ -0,0 +1,50 @@ +#include "qemu/osdep.h" +#include "hw/acpi/cpu_hotplug.h" +#include "migration/vmstate.h" + + +/* Following stubs are all related to ACPI cpu hotplug */ +const VMStateDescription vmstate_cpu_hotplug; + +void acpi_switch_to_modern_cphp(AcpiCpuHotplug *gpe_cpu, + CPUHotplugState *cpuhp_state, + uint16_t io_port) +{ + return; +} + +void legacy_acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner, + AcpiCpuHotplug *gpe_cpu, uint16_t base) +{ + return; +} + +void acpi_cpu_ospm_status(CPUHotplugState *cpu_st, ACPIOSTInfoList ***list) +{ + return; +} + +void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, + CPUHotplugState *cpu_st, DeviceState *dev, Error **errp) +{ + return; +} + +void legacy_acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, + AcpiCpuHotplug *g, DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st, + DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev, + CPUHotplugState *cpu_st, + DeviceState *dev, Error **errp) +{ + return; +} diff --git a/hw/acpi/acpi-mem-hotplug-stub.c b/hw/acpi/acpi-mem-hotplug-stub.c new file mode 100644 index 0000000000..73a076a265 --- /dev/null +++ b/hw/acpi/acpi-mem-hotplug-stub.c @@ -0,0 +1,35 @@ +#include "qemu/osdep.h" +#include "hw/acpi/memory_hotplug.h" +#include "migration/vmstate.h" + +const VMStateDescription vmstate_memory_hotplug; + +void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner, + MemHotplugState *state, hwaddr io_base) +{ + return; +} + +void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list) +{ + return; +} + +void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st, + DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_memory_unplug_cb(MemHotplugState *mem_st, + DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev, + MemHotplugState *mem_st, + DeviceState *dev, Error **errp) +{ + return; +} diff --git a/hw/acpi/acpi-nvdimm-stub.c b/hw/acpi/acpi-nvdimm-stub.c new file mode 100644 index 0000000000..8baff9be6f --- /dev/null +++ b/hw/acpi/acpi-nvdimm-stub.c @@ -0,0 +1,8 @@ +#include "qemu/osdep.h" +#include "hw/mem/nvdimm.h" +#include "hw/hotplug.h" + +void nvdimm_acpi_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev) +{ + return; +} diff --git a/hw/acpi/acpi-pci-hotplug-stub.c b/hw/acpi/acpi-pci-hotplug-stub.c new file mode 100644 index 0000000000..734e4c5986 --- /dev/null +++ b/hw/acpi/acpi-pci-hotplug-stub.c @@ -0,0 +1,47 @@ +#include "qemu/osdep.h" +#include "hw/acpi/pcihp.h" +#include "migration/vmstate.h" + +const VMStateDescription vmstate_acpi_pcihp_pci_status; + +void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus, + MemoryRegion *address_space_io, bool bridges_enabled, + uint16_t io_base) +{ + return; +} + +void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, + DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, + DeviceState *dev, Error **errp) +{ + return; +} + +void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev, + AcpiPciHpState *s, DeviceState *dev, + Error **errp) +{ + return; +} + +void acpi_pcihp_reset(AcpiPciHpState *s, bool acpihp_root_off) +{ + return; +} + +bool vmstate_acpi_pcihp_use_acpi_index(void *opaque, int version_id) +{ + return false; +} diff --git a/hw/acpi/meson.build b/hw/acpi/meson.build index 29f804d13e..7d8c0eb43e 100644 --- a/hw/acpi/meson.build +++ b/hw/acpi/meson.build @@ -6,16 +6,20 @@ acpi_ss.add(files( 'core.c', 'utils.c', )) -acpi_ss.add(when: 'CONFIG_ACPI_CPU_HOTPLUG', if_true: files('cpu.c')) -acpi_ss.add(when: 'CONFIG_ACPI_CPU_HOTPLUG', if_true: files('cpu_hotplug.c')) +acpi_ss.add(when: 'CONFIG_ACPI_CPU_HOTPLUG', if_true: files('cpu.c', 'cpu_hotplug.c')) +acpi_ss.add(when: 'CONFIG_ACPI_CPU_HOTPLUG', if_false: files('acpi-cpu-hotplug-stub.c')) acpi_ss.add(when: 'CONFIG_ACPI_MEMORY_HOTPLUG', if_true: files('memory_hotplug.c')) +acpi_ss.add(when: 'CONFIG_ACPI_MEMORY_HOTPLUG', if_false: files('acpi-mem-hotplug-stub.c')) acpi_ss.add(when: 'CONFIG_ACPI_NVDIMM', if_true: files('nvdimm.c')) +acpi_ss.add(when: 'CONFIG_ACPI_NVDIMM', if_false: files('acpi-nvdimm-stub.c')) acpi_ss.add(when: 'CONFIG_ACPI_PCI', if_true: files('pci.c')) acpi_ss.add(when: 'CONFIG_ACPI_VMGENID', if_true: files('vmgenid.c')) acpi_ss.add(when: 'CONFIG_ACPI_HW_REDUCED', if_true: files('generic_event_device.c')) acpi_ss.add(when: 'CONFIG_ACPI_HMAT', if_true: files('hmat.c')) acpi_ss.add(when: 'CONFIG_ACPI_APEI', if_true: files('ghes.c'), if_false: files('ghes-stub.c')) -acpi_ss.add(when: 'CONFIG_ACPI_X86', if_true: files('piix4.c', 'pcihp.c')) +acpi_ss.add(when: 'CONFIG_ACPI_PIIX4', if_true: files('piix4.c')) +acpi_ss.add(when: 'CONFIG_ACPI_PCIHP', if_true: files('pcihp.c')) +acpi_ss.add(when: 'CONFIG_ACPI_PCIHP', if_false: files('acpi-pci-hotplug-stub.c')) acpi_ss.add(when: 'CONFIG_ACPI_X86_ICH', if_true: files('ich9.c', 'tco.c')) acpi_ss.add(when: 'CONFIG_IPMI', if_true: files('ipmi.c'), if_false: files('ipmi-stub.c')) acpi_ss.add(when: 'CONFIG_PC', if_false: files('acpi-x86-stub.c')) @@ -23,4 +27,6 @@ acpi_ss.add(when: 'CONFIG_TPM', if_true: files('tpm.c')) softmmu_ss.add(when: 'CONFIG_ACPI', if_false: files('acpi-stub.c', 'aml-build-stub.c', 'ghes-stub.c')) softmmu_ss.add_all(when: 'CONFIG_ACPI', if_true: acpi_ss) softmmu_ss.add(when: 'CONFIG_ALL', if_true: files('acpi-stub.c', 'aml-build-stub.c', - 'acpi-x86-stub.c', 'ipmi-stub.c', 'ghes-stub.c')) + 'acpi-x86-stub.c', 'ipmi-stub.c', 'ghes-stub.c', + 'acpi-mem-hotplug-stub.c', 'acpi-cpu-hotplug-stub.c', + 'acpi-pci-hotplug-stub.c', 'acpi-nvdimm-stub.c'))