From ae8d4a8ac5abca7e2aee3fbd971446591bcdbd32 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Mon, 1 Aug 2016 08:11:30 +0200 Subject: [PATCH 30/99] acpi: cpuhp: add CPU devices AML with _STA method RH-Author: Igor Mammedov Message-id: <1470039143-24450-26-git-send-email-imammedo@redhat.com> Patchwork-id: 71641 O-Subject: [RHEV-7.3 qemu-kvm-rhev PATCH 25/78] acpi: cpuhp: add CPU devices AML with _STA method Bugzilla: 1087672 RH-Acked-by: Marcel Apfelbaum RH-Acked-by: David Gibson RH-Acked-by: Eduardo Habkost it adds CPU objects to DSDT with _STA method and QEMU side of CPU hotplug interface initialization with registers sufficient to handle _STA requests, including necessary hotplug callbacks in piix4,ich9 code. Hot-(un)plug hw/acpi parts will be added by corresponding follow up patches. Signed-off-by: Igor Mammedov Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 5e1b5d93887b52eede156f846b6c4c5c8bbcfcdb) Signed-off-by: Miroslav Rezanina Conflicts: hw/acpi/trace-events - missing file since 2.6 doesn't have trace-events split - resolved by moving cpuhp_* trace events to trace-events --- hw/acpi/Makefile.objs | 1 + hw/acpi/cpu.c | 240 +++++++++++++++++++++++++++++++++++++++++++++++++ hw/acpi/ich9.c | 9 +- hw/acpi/piix4.c | 11 ++- include/hw/acpi/cpu.h | 51 +++++++++++ include/hw/acpi/ich9.h | 2 + trace-events | 5 ++ 7 files changed, 313 insertions(+), 6 deletions(-) create mode 100644 hw/acpi/cpu.c create mode 100644 include/hw/acpi/cpu.h diff --git a/hw/acpi/Makefile.objs b/hw/acpi/Makefile.objs index 66bd727..f200419 100644 --- a/hw/acpi/Makefile.objs +++ b/hw/acpi/Makefile.objs @@ -2,6 +2,7 @@ common-obj-$(CONFIG_ACPI_X86) += core.o piix4.o pcihp.o common-obj-$(CONFIG_ACPI_X86_ICH) += ich9.o tco.o common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu_hotplug.o common-obj-$(CONFIG_ACPI_MEMORY_HOTPLUG) += memory_hotplug.o memory_hotplug_acpi_table.o +common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu.o obj-$(CONFIG_ACPI_NVDIMM) += nvdimm.o common-obj-$(CONFIG_ACPI) += acpi_interface.o common-obj-$(CONFIG_ACPI) += bios-linker-loader.o diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c new file mode 100644 index 0000000..d99002c --- /dev/null +++ b/hw/acpi/cpu.c @@ -0,0 +1,240 @@ +#include "qemu/osdep.h" +#include "hw/boards.h" +#include "hw/acpi/cpu.h" +#include "qapi/error.h" +#include "trace.h" + +#define ACPI_CPU_HOTPLUG_REG_LEN 12 +#define ACPI_CPU_SELECTOR_OFFSET_WR 0 +#define ACPI_CPU_FLAGS_OFFSET_RW 4 + +static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size) +{ + uint64_t val = 0; + CPUHotplugState *cpu_st = opaque; + AcpiCpuStatus *cdev; + + if (cpu_st->selector >= cpu_st->dev_count) { + return val; + } + + cdev = &cpu_st->devs[cpu_st->selector]; + switch (addr) { + case ACPI_CPU_FLAGS_OFFSET_RW: /* pack and return is_* fields */ + val |= cdev->cpu ? 1 : 0; + trace_cpuhp_acpi_read_flags(cpu_st->selector, val); + break; + default: + break; + } + return val; +} + +static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data, + unsigned int size) +{ + CPUHotplugState *cpu_st = opaque; + + assert(cpu_st->dev_count); + + if (addr) { + if (cpu_st->selector >= cpu_st->dev_count) { + trace_cpuhp_acpi_invalid_idx_selected(cpu_st->selector); + return; + } + } + + switch (addr) { + case ACPI_CPU_SELECTOR_OFFSET_WR: /* current CPU selector */ + cpu_st->selector = data; + trace_cpuhp_acpi_write_idx(cpu_st->selector); + break; + default: + break; + } +} + +static const MemoryRegionOps cpu_hotplug_ops = { + .read = cpu_hotplug_rd, + .write = cpu_hotplug_wr, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 4, + }, +}; + +void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner, + CPUHotplugState *state, hwaddr base_addr) +{ + MachineState *machine = MACHINE(qdev_get_machine()); + MachineClass *mc = MACHINE_GET_CLASS(machine); + CPUArchIdList *id_list; + int i; + + assert(mc->possible_cpu_arch_ids); + id_list = mc->possible_cpu_arch_ids(machine); + state->dev_count = id_list->len; + state->devs = g_new0(typeof(*state->devs), state->dev_count); + for (i = 0; i < id_list->len; i++) { + state->devs[i].cpu = id_list->cpus[i].cpu; + state->devs[i].arch_id = id_list->cpus[i].arch_id; + } + g_free(id_list); + memory_region_init_io(&state->ctrl_reg, owner, &cpu_hotplug_ops, state, + "acpi-mem-hotplug", ACPI_CPU_HOTPLUG_REG_LEN); + memory_region_add_subregion(as, base_addr, &state->ctrl_reg); +} + +static AcpiCpuStatus *get_cpu_status(CPUHotplugState *cpu_st, DeviceState *dev) +{ + CPUClass *k = CPU_GET_CLASS(dev); + uint64_t cpu_arch_id = k->get_arch_id(CPU(dev)); + int i; + + for (i = 0; i < cpu_st->dev_count; i++) { + if (cpu_arch_id == cpu_st->devs[i].arch_id) { + return &cpu_st->devs[i]; + } + } + return NULL; +} + +void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, + CPUHotplugState *cpu_st, DeviceState *dev, Error **errp) +{ + AcpiCpuStatus *cdev; + + cdev = get_cpu_status(cpu_st, dev); + if (!cdev) { + return; + } + + cdev->cpu = CPU(dev); +} + +const VMStateDescription vmstate_cpu_hotplug = { + .name = "CPU hotplug state", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(selector, CPUHotplugState), + VMSTATE_END_OF_LIST() + } +}; + +#define CPU_NAME_FMT "C%.03X" +#define CPUHP_RES_DEVICE "PRES" +#define CPU_LOCK "CPLK" +#define CPU_STS_METHOD "CSTA" + +#define CPU_ENABLED "CPEN" +#define CPU_SELECTOR "CSEL" + +void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, + hwaddr io_base, + const char *res_root) +{ + Aml *ifctx; + Aml *field; + Aml *method; + Aml *cpu_ctrl_dev; + Aml *cpus_dev; + Aml *zero = aml_int(0); + Aml *one = aml_int(1); + Aml *sb_scope = aml_scope("_SB"); + MachineClass *mc = MACHINE_GET_CLASS(machine); + CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine); + char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root); + + cpu_ctrl_dev = aml_device("%s", cphp_res_path); + { + Aml *crs; + + aml_append(cpu_ctrl_dev, + aml_name_decl("_HID", aml_eisaid("PNP0A06"))); + aml_append(cpu_ctrl_dev, + aml_name_decl("_UID", aml_string("CPU Hotplug resources"))); + aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0)); + + crs = aml_resource_template(); + aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1, + ACPI_CPU_HOTPLUG_REG_LEN)); + aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs)); + + /* declare CPU hotplug MMIO region with related access fields */ + aml_append(cpu_ctrl_dev, + aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base), + ACPI_CPU_HOTPLUG_REG_LEN)); + + field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK, + AML_WRITE_AS_ZEROS); + aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8)); + /* 1 if enabled, read only */ + aml_append(field, aml_named_field(CPU_ENABLED, 1)); + aml_append(cpu_ctrl_dev, field); + + field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE); + /* CPU selector, write only */ + aml_append(field, aml_named_field(CPU_SELECTOR, 32)); + aml_append(cpu_ctrl_dev, field); + + } + aml_append(sb_scope, cpu_ctrl_dev); + + cpus_dev = aml_device("\\_SB.CPUS"); + { + int i; + Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK); + Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR); + Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED); + + aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010"))); + aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05"))); + + method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED); + { + Aml *idx = aml_arg(0); + Aml *sta = aml_local(0); + + aml_append(method, aml_acquire(ctrl_lock, 0xFFFF)); + aml_append(method, aml_store(idx, cpu_selector)); + aml_append(method, aml_store(zero, sta)); + ifctx = aml_if(aml_equal(is_enabled, one)); + { + aml_append(ifctx, aml_store(aml_int(0xF), sta)); + } + aml_append(method, ifctx); + aml_append(method, aml_release(ctrl_lock)); + aml_append(method, aml_return(sta)); + } + aml_append(cpus_dev, method); + + /* build Processor object for each processor */ + for (i = 0; i < arch_ids->len; i++) { + Aml *dev; + Aml *uid = aml_int(i); + int arch_id = arch_ids->cpus[i].arch_id; + + if (opts.apci_1_compatible && arch_id < 255) { + dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i); + } else { + dev = aml_device(CPU_NAME_FMT, i); + aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007"))); + aml_append(dev, aml_name_decl("_UID", uid)); + } + + method = aml_method("_STA", 0, AML_SERIALIZED); + aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid))); + aml_append(dev, method); + + aml_append(cpus_dev, dev); + } + } + aml_append(sb_scope, cpus_dev); + aml_append(table, sb_scope); + + g_free(cphp_res_path); + g_free(arch_ids); +} diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c index ed16940..9a81da8 100644 --- a/hw/acpi/ich9.c +++ b/hw/acpi/ich9.c @@ -459,9 +459,12 @@ void ich9_pm_device_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { acpi_memory_plug_cb(hotplug_dev, &lpc->pm.acpi_memory_hotplug, dev, errp); - } else if (lpc->pm.cpu_hotplug_legacy && - object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { - legacy_acpi_cpu_plug_cb(hotplug_dev, &lpc->pm.gpe_cpu, 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); + } } else { error_setg(errp, "acpi: device plug request for not supported device" " type: %s", object_get_typename(OBJECT(dev))); diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c index 3a1b3e4..a4af8f0 100644 --- a/hw/acpi/piix4.c +++ b/hw/acpi/piix4.c @@ -34,6 +34,7 @@ #include "hw/acpi/piix4.h" #include "hw/acpi/pcihp.h" #include "hw/acpi/cpu_hotplug.h" +#include "hw/acpi/cpu.h" #include "hw/hotplug.h" #include "hw/mem/pc-dimm.h" #include "hw/acpi/memory_hotplug.h" @@ -87,6 +88,7 @@ typedef struct PIIX4PMState { bool cpu_hotplug_legacy; AcpiCpuHotplug gpe_cpu; + CPUHotplugState cpuhp_state; MemHotplugState acpi_memory_hotplug; } PIIX4PMState; @@ -351,9 +353,12 @@ static void piix4_device_plug_cb(HotplugHandler *hotplug_dev, acpi_memory_plug_cb(hotplug_dev, &s->acpi_memory_hotplug, dev, errp); } 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 (s->cpu_hotplug_legacy && - object_dynamic_cast(OBJECT(dev), TYPE_CPU)) { - legacy_acpi_cpu_plug_cb(hotplug_dev, &s->gpe_cpu, 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); + } } else { error_setg(errp, "acpi: device plug request for not supported device" " type: %s", object_get_typename(OBJECT(dev))); diff --git a/include/hw/acpi/cpu.h b/include/hw/acpi/cpu.h new file mode 100644 index 0000000..f345447 --- /dev/null +++ b/include/hw/acpi/cpu.h @@ -0,0 +1,51 @@ +/* + * QEMU ACPI hotplug utilities + * + * Copyright (C) 2016 Red Hat Inc + * + * Authors: + * Igor Mammedov + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#ifndef ACPI_CPU_H +#define ACPI_CPU_H + +#include "hw/qdev-core.h" +#include "hw/acpi/acpi.h" +#include "hw/acpi/aml-build.h" +#include "hw/hotplug.h" + +typedef struct AcpiCpuStatus { + struct CPUState *cpu; + uint64_t arch_id; +} AcpiCpuStatus; + +typedef struct CPUHotplugState { + MemoryRegion ctrl_reg; + uint32_t selector; + uint32_t dev_count; + AcpiCpuStatus *devs; +} CPUHotplugState; + +void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev, + CPUHotplugState *cpu_st, DeviceState *dev, Error **errp); + +void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner, + CPUHotplugState *state, hwaddr base_addr); + +typedef struct CPUHotplugFeatures { + bool apci_1_compatible; +} CPUHotplugFeatures; + +void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts, + hwaddr io_base, + const char *res_root); + +extern const VMStateDescription vmstate_cpu_hotplug; +#define VMSTATE_CPU_HOTPLUG(cpuhp, state) \ + VMSTATE_STRUCT(cpuhp, state, 1, \ + vmstate_cpu_hotplug, CPUHotplugState) + +#endif diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h index e29a856..a352c94 100644 --- a/include/hw/acpi/ich9.h +++ b/include/hw/acpi/ich9.h @@ -23,6 +23,7 @@ #include "hw/acpi/acpi.h" #include "hw/acpi/cpu_hotplug.h" +#include "hw/acpi/cpu.h" #include "hw/acpi/memory_hotplug.h" #include "hw/acpi/acpi_dev_interface.h" #include "hw/acpi/tco.h" @@ -50,6 +51,7 @@ typedef struct ICH9LPCPMRegs { bool cpu_hotplug_legacy; AcpiCpuHotplug gpe_cpu; + CPUHotplugState cpuhp_state; MemHotplugState acpi_memory_hotplug; diff --git a/trace-events b/trace-events index c58eb2f..d707ee6 100644 --- a/trace-events +++ b/trace-events @@ -1784,6 +1784,11 @@ mhp_acpi_pc_dimm_delete_failed(uint32_t slot) "slot[0x%"PRIx32"] pc-dimm delete mhp_pc_dimm_assigned_slot(int slot) "0x%d" mhp_pc_dimm_assigned_address(uint64_t addr) "0x%"PRIx64 +# hw/acpi/cpu.c +cpuhp_acpi_invalid_idx_selected(uint32_t idx) "0x%"PRIx32 +cpuhp_acpi_read_flags(uint32_t idx, uint8_t flags) "idx[0x%"PRIx32"] flags: 0x%"PRIx8 +cpuhp_acpi_write_idx(uint32_t idx) "set active cpu idx: 0x%"PRIx32 + # target-s390x/kvm.c kvm_enable_cmma(int rc) "CMMA: enabling with result code %d" kvm_clear_cmma(int rc) "CMMA: clearing with result code %d" -- 1.8.3.1