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Diffstat (limited to 'hw/acpi/cpu.c')
-rw-r--r--hw/acpi/cpu.c90
1 files changed, 86 insertions, 4 deletions
diff --git a/hw/acpi/cpu.c b/hw/acpi/cpu.c
index 811be8a2d3..483b80810e 100644
--- a/hw/acpi/cpu.c
+++ b/hw/acpi/cpu.c
@@ -30,6 +30,7 @@ static uint64_t cpu_hotplug_rd(void *opaque, hwaddr addr, unsigned size)
case ACPI_CPU_FLAGS_OFFSET_RW: /* pack and return is_* fields */
val |= cdev->cpu ? 1 : 0;
val |= cdev->is_inserting ? 2 : 0;
+ val |= cdev->is_removing ? 4 : 0;
trace_cpuhp_acpi_read_flags(cpu_st->selector, val);
break;
case ACPI_CPU_CMD_DATA_OFFSET_RW:
@@ -73,6 +74,22 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
if (data & 2) { /* clear insert event */
cdev->is_inserting = false;
trace_cpuhp_acpi_clear_inserting_evt(cpu_st->selector);
+ } else if (data & 4) { /* clear remove event */
+ cdev->is_removing = false;
+ trace_cpuhp_acpi_clear_remove_evt(cpu_st->selector);
+ } else if (data & 8) {
+ DeviceState *dev = NULL;
+ HotplugHandler *hotplug_ctrl = NULL;
+
+ if (!cdev->cpu) {
+ trace_cpuhp_acpi_ejecting_invalid_cpu(cpu_st->selector);
+ break;
+ }
+
+ trace_cpuhp_acpi_ejecting_cpu(cpu_st->selector);
+ dev = DEVICE(cdev->cpu);
+ hotplug_ctrl = qdev_get_hotplug_handler(dev);
+ hotplug_handler_unplug(hotplug_ctrl, dev, NULL);
}
break;
case ACPI_CPU_CMD_OFFSET_WR:
@@ -84,10 +101,10 @@ static void cpu_hotplug_wr(void *opaque, hwaddr addr, uint64_t data,
do {
cdev = &cpu_st->devs[iter];
- if (cdev->is_inserting) {
+ if (cdev->is_inserting || cdev->is_removing) {
cpu_st->selector = iter;
trace_cpuhp_acpi_cpu_has_events(cpu_st->selector,
- cdev->is_inserting);
+ cdev->is_inserting, cdev->is_removing);
break;
}
iter = iter + 1 < cpu_st->dev_count ? iter + 1 : 0;
@@ -163,6 +180,34 @@ void acpi_cpu_plug_cb(HotplugHandler *hotplug_dev,
}
}
+void acpi_cpu_unplug_request_cb(HotplugHandler *hotplug_dev,
+ CPUHotplugState *cpu_st,
+ DeviceState *dev, Error **errp)
+{
+ AcpiCpuStatus *cdev;
+
+ cdev = get_cpu_status(cpu_st, dev);
+ if (!cdev) {
+ return;
+ }
+
+ cdev->is_removing = true;
+ acpi_send_event(DEVICE(hotplug_dev), ACPI_CPU_HOTPLUG_STATUS);
+}
+
+void acpi_cpu_unplug_cb(CPUHotplugState *cpu_st,
+ DeviceState *dev, Error **errp)
+{
+ AcpiCpuStatus *cdev;
+
+ cdev = get_cpu_status(cpu_st, dev);
+ if (!cdev) {
+ return;
+ }
+
+ cdev->cpu = NULL;
+}
+
static const VMStateDescription vmstate_cpuhp_sts = {
.name = "CPU hotplug device state",
.version_id = 1,
@@ -170,6 +215,7 @@ static const VMStateDescription vmstate_cpuhp_sts = {
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_BOOL(is_inserting, AcpiCpuStatus),
+ VMSTATE_BOOL(is_removing, AcpiCpuStatus),
VMSTATE_END_OF_LIST()
}
};
@@ -194,12 +240,15 @@ const VMStateDescription vmstate_cpu_hotplug = {
#define CPU_STS_METHOD "CSTA"
#define CPU_SCAN_METHOD "CSCN"
#define CPU_NOTIFY_METHOD "CTFY"
+#define CPU_EJECT_METHOD "CEJ0"
#define CPU_ENABLED "CPEN"
#define CPU_SELECTOR "CSEL"
#define CPU_COMMAND "CCMD"
#define CPU_DATA "CDAT"
#define CPU_INSERT_EVENT "CINS"
+#define CPU_REMOVE_EVENT "CRMV"
+#define CPU_EJECT_EVENT "CEJ0"
void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
hwaddr io_base,
@@ -248,7 +297,11 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
aml_append(field, aml_named_field(CPU_ENABLED, 1));
/* (read) 1 if has a insert event. (write) 1 to clear event */
aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1));
- aml_append(field, aml_reserved_field(6));
+ /* (read) 1 if has a remove event. (write) 1 to clear event */
+ aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1));
+ /* initiates device eject, write only */
+ aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1));
+ aml_append(field, aml_reserved_field(4));
aml_append(field, aml_named_field(CPU_COMMAND, 8));
aml_append(cpu_ctrl_dev, field);
@@ -272,6 +325,8 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND);
Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA);
Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT);
+ Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT);
+ Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT);
aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010")));
aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05")));
@@ -308,18 +363,31 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
}
aml_append(cpus_dev, method);
+ method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED);
+ {
+ Aml *idx = aml_arg(0);
+
+ aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
+ aml_append(method, aml_store(idx, cpu_selector));
+ aml_append(method, aml_store(one, ej_evt));
+ aml_append(method, aml_release(ctrl_lock));
+ }
+ aml_append(cpus_dev, method);
+
method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED);
{
+ Aml *else_ctx;
Aml *while_ctx;
Aml *has_event = aml_local(0);
Aml *dev_chk = aml_int(1);
+ Aml *eject_req = aml_int(3);
Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(one, has_event));
while_ctx = aml_while(aml_equal(has_event, one));
{
- /* clear loop exit condition, ins_evt check
+ /* clear loop exit condition, ins_evt/rm_evt checks
* will set it to 1 while next_cpu_cmd returns a CPU
* with events */
aml_append(while_ctx, aml_store(zero, has_event));
@@ -332,6 +400,16 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
aml_append(ifctx, aml_store(one, has_event));
}
aml_append(while_ctx, ifctx);
+ else_ctx = aml_else();
+ ifctx = aml_if(aml_equal(rm_evt, one));
+ {
+ aml_append(ifctx,
+ aml_call2(CPU_NOTIFY_METHOD, cpu_data, eject_req));
+ aml_append(ifctx, aml_store(one, rm_evt));
+ aml_append(ifctx, aml_store(one, has_event));
+ }
+ aml_append(else_ctx, ifctx);
+ aml_append(while_ctx, else_ctx);
}
aml_append(method, while_ctx);
aml_append(method, aml_release(ctrl_lock));
@@ -373,6 +451,10 @@ void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data)));
g_array_free(madt_buf, true);
+ method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
+ aml_append(method, aml_call1(CPU_EJECT_METHOD, uid));
+ aml_append(dev, method);
+
aml_append(cpus_dev, dev);
}
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-26 23:44:29 +0000