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qemu-e2k/hw/acpi/ich9.c
Tang Chen 91a734a6fa acpi, ich9: Add unplug cb for ich9. 
Memory and CPU hot unplug are both asynchronous procedures.
When the unplug operation happens, unplug request cb is called first.
And when guest OS finished handling unplug, unplug cb will be called
to do the real removal of device.

This patch adds hotunplug cb to ich9, which memory and CPU
hot unplug will use it.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2015-02-26 12:42:18 +01:00

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/*
* ACPI implementation
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
*
* This is based on acpi.c.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "hw/hw.h"
#include "qapi/visitor.h"
#include "hw/i386/pc.h"
#include "hw/pci/pci.h"
#include "qemu/timer.h"
#include "sysemu/sysemu.h"
#include "hw/acpi/acpi.h"
#include "sysemu/kvm.h"
#include "exec/address-spaces.h"
#include "hw/i386/ich9.h"
#include "hw/mem/pc-dimm.h"
//#define DEBUG
#ifdef DEBUG
#define ICH9_DEBUG(fmt, ...) \
do { printf("%s "fmt, __func__, ## __VA_ARGS__); } while (0)
#else
#define ICH9_DEBUG(fmt, ...) do { } while (0)
#endif
static void ich9_pm_update_sci_fn(ACPIREGS *regs)
{
ICH9LPCPMRegs *pm = container_of(regs, ICH9LPCPMRegs, acpi_regs);
acpi_update_sci(&pm->acpi_regs, pm->irq);
}
static uint64_t ich9_gpe_readb(void *opaque, hwaddr addr, unsigned width)
{
ICH9LPCPMRegs *pm = opaque;
return acpi_gpe_ioport_readb(&pm->acpi_regs, addr);
}
static void ich9_gpe_writeb(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
ICH9LPCPMRegs *pm = opaque;
acpi_gpe_ioport_writeb(&pm->acpi_regs, addr, val);
acpi_update_sci(&pm->acpi_regs, pm->irq);
}
static const MemoryRegionOps ich9_gpe_ops = {
.read = ich9_gpe_readb,
.write = ich9_gpe_writeb,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.impl.min_access_size = 1,
.impl.max_access_size = 1,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static uint64_t ich9_smi_readl(void *opaque, hwaddr addr, unsigned width)
{
ICH9LPCPMRegs *pm = opaque;
switch (addr) {
case 0:
return pm->smi_en;
case 4:
return pm->smi_sts;
default:
return 0;
}
}
static void ich9_smi_writel(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
ICH9LPCPMRegs *pm = opaque;
switch (addr) {
case 0:
pm->smi_en = val;
break;
}
}
static const MemoryRegionOps ich9_smi_ops = {
.read = ich9_smi_readl,
.write = ich9_smi_writel,
.valid.min_access_size = 4,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
void ich9_pm_iospace_update(ICH9LPCPMRegs *pm, uint32_t pm_io_base)
{
ICH9_DEBUG("to 0x%x\n", pm_io_base);
assert((pm_io_base & ICH9_PMIO_MASK) == 0);
pm->pm_io_base = pm_io_base;
memory_region_transaction_begin();
memory_region_set_enabled(&pm->io, pm->pm_io_base != 0);
memory_region_set_address(&pm->io, pm->pm_io_base);
memory_region_transaction_commit();
}
static int ich9_pm_post_load(void *opaque, int version_id)
{
ICH9LPCPMRegs *pm = opaque;
uint32_t pm_io_base = pm->pm_io_base;
pm->pm_io_base = 0;
ich9_pm_iospace_update(pm, pm_io_base);
return 0;
}
#define VMSTATE_GPE_ARRAY(_field, _state) \
{ \
.name = (stringify(_field)), \
.version_id = 0, \
.num = ICH9_PMIO_GPE0_LEN, \
.info = &vmstate_info_uint8, \
.size = sizeof(uint8_t), \
.flags = VMS_ARRAY | VMS_POINTER, \
.offset = vmstate_offset_pointer(_state, _field, uint8_t), \
}
static bool vmstate_test_use_memhp(void *opaque)
{
ICH9LPCPMRegs *s = opaque;
return s->acpi_memory_hotplug.is_enabled;
}
static const VMStateDescription vmstate_memhp_state = {
.name = "ich9_pm/memhp",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_MEMORY_HOTPLUG(acpi_memory_hotplug, ICH9LPCPMRegs),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_ich9_pm = {
.name = "ich9_pm",
.version_id = 1,
.minimum_version_id = 1,
.post_load = ich9_pm_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT16(acpi_regs.pm1.evt.sts, ICH9LPCPMRegs),
VMSTATE_UINT16(acpi_regs.pm1.evt.en, ICH9LPCPMRegs),
VMSTATE_UINT16(acpi_regs.pm1.cnt.cnt, ICH9LPCPMRegs),
VMSTATE_TIMER_PTR(acpi_regs.tmr.timer, ICH9LPCPMRegs),
VMSTATE_INT64(acpi_regs.tmr.overflow_time, ICH9LPCPMRegs),
VMSTATE_GPE_ARRAY(acpi_regs.gpe.sts, ICH9LPCPMRegs),
VMSTATE_GPE_ARRAY(acpi_regs.gpe.en, ICH9LPCPMRegs),
VMSTATE_UINT32(smi_en, ICH9LPCPMRegs),
VMSTATE_UINT32(smi_sts, ICH9LPCPMRegs),
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection[]) {
{
.vmsd = &vmstate_memhp_state,
.needed = vmstate_test_use_memhp,
},
VMSTATE_END_OF_LIST()
}
};
static void pm_reset(void *opaque)
{
ICH9LPCPMRegs *pm = opaque;
ich9_pm_iospace_update(pm, 0);
acpi_pm1_evt_reset(&pm->acpi_regs);
acpi_pm1_cnt_reset(&pm->acpi_regs);
acpi_pm_tmr_reset(&pm->acpi_regs);
acpi_gpe_reset(&pm->acpi_regs);
if (kvm_enabled()) {
/* Mark SMM as already inited to prevent SMM from running. KVM does not
* support SMM mode. */
pm->smi_en |= ICH9_PMIO_SMI_EN_APMC_EN;
}
acpi_update_sci(&pm->acpi_regs, pm->irq);
}
static void pm_powerdown_req(Notifier *n, void *opaque)
{
ICH9LPCPMRegs *pm = container_of(n, ICH9LPCPMRegs, powerdown_notifier);
acpi_pm1_evt_power_down(&pm->acpi_regs);
}
void ich9_pm_init(PCIDevice *lpc_pci, ICH9LPCPMRegs *pm,
qemu_irq sci_irq)
{
memory_region_init(&pm->io, OBJECT(lpc_pci), "ich9-pm", ICH9_PMIO_SIZE);
memory_region_set_enabled(&pm->io, false);
memory_region_add_subregion(pci_address_space_io(lpc_pci),
0, &pm->io);
acpi_pm_tmr_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
acpi_pm1_evt_init(&pm->acpi_regs, ich9_pm_update_sci_fn, &pm->io);
acpi_pm1_cnt_init(&pm->acpi_regs, &pm->io, pm->s4_val);
acpi_gpe_init(&pm->acpi_regs, ICH9_PMIO_GPE0_LEN);
memory_region_init_io(&pm->io_gpe, OBJECT(lpc_pci), &ich9_gpe_ops, pm,
"acpi-gpe0", ICH9_PMIO_GPE0_LEN);
memory_region_add_subregion(&pm->io, ICH9_PMIO_GPE0_STS, &pm->io_gpe);
memory_region_init_io(&pm->io_smi, OBJECT(lpc_pci), &ich9_smi_ops, pm,
"acpi-smi", 8);
memory_region_add_subregion(&pm->io, ICH9_PMIO_SMI_EN, &pm->io_smi);
pm->irq = sci_irq;
qemu_register_reset(pm_reset, pm);
pm->powerdown_notifier.notify = pm_powerdown_req;
qemu_register_powerdown_notifier(&pm->powerdown_notifier);
acpi_cpu_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
&pm->gpe_cpu, ICH9_CPU_HOTPLUG_IO_BASE);
if (pm->acpi_memory_hotplug.is_enabled) {
acpi_memory_hotplug_init(pci_address_space_io(lpc_pci), OBJECT(lpc_pci),
&pm->acpi_memory_hotplug);
}
}
static void ich9_pm_get_gpe0_blk(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
uint32_t value = pm->pm_io_base + ICH9_PMIO_GPE0_STS;
visit_type_uint32(v, &value, name, errp);
}
static bool ich9_pm_get_memory_hotplug_support(Object *obj, Error **errp)
{
ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
return s->pm.acpi_memory_hotplug.is_enabled;
}
static void ich9_pm_set_memory_hotplug_support(Object *obj, bool value,
Error **errp)
{
ICH9LPCState *s = ICH9_LPC_DEVICE(obj);
s->pm.acpi_memory_hotplug.is_enabled = value;
}
static void ich9_pm_get_disable_s3(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
uint8_t value = pm->disable_s3;
visit_type_uint8(v, &value, name, errp);
}
static void ich9_pm_set_disable_s3(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
Error *local_err = NULL;
uint8_t value;
visit_type_uint8(v, &value, name, &local_err);
if (local_err) {
goto out;
}
pm->disable_s3 = value;
out:
error_propagate(errp, local_err);
}
static void ich9_pm_get_disable_s4(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
uint8_t value = pm->disable_s4;
visit_type_uint8(v, &value, name, errp);
}
static void ich9_pm_set_disable_s4(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
Error *local_err = NULL;
uint8_t value;
visit_type_uint8(v, &value, name, &local_err);
if (local_err) {
goto out;
}
pm->disable_s4 = value;
out:
error_propagate(errp, local_err);
}
static void ich9_pm_get_s4_val(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
uint8_t value = pm->s4_val;
visit_type_uint8(v, &value, name, errp);
}
static void ich9_pm_set_s4_val(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
ICH9LPCPMRegs *pm = opaque;
Error *local_err = NULL;
uint8_t value;
visit_type_uint8(v, &value, name, &local_err);
if (local_err) {
goto out;
}
pm->s4_val = value;
out:
error_propagate(errp, local_err);
}
void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp)
{
static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN;
pm->acpi_memory_hotplug.is_enabled = true;
pm->disable_s3 = 0;
pm->disable_s4 = 0;
pm->s4_val = 2;
object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE,
&pm->pm_io_base, errp);
object_property_add(obj, ACPI_PM_PROP_GPE0_BLK, "uint32",
ich9_pm_get_gpe0_blk,
NULL, NULL, pm, NULL);
object_property_add_uint32_ptr(obj, ACPI_PM_PROP_GPE0_BLK_LEN,
&gpe0_len, errp);
object_property_add_bool(obj, "memory-hotplug-support",
ich9_pm_get_memory_hotplug_support,
ich9_pm_set_memory_hotplug_support,
NULL);
object_property_add(obj, ACPI_PM_PROP_S3_DISABLED, "uint8",
ich9_pm_get_disable_s3,
ich9_pm_set_disable_s3,
NULL, pm, NULL);
object_property_add(obj, ACPI_PM_PROP_S4_DISABLED, "uint8",
ich9_pm_get_disable_s4,
ich9_pm_set_disable_s4,
NULL, pm, NULL);
object_property_add(obj, ACPI_PM_PROP_S4_VAL, "uint8",
ich9_pm_get_s4_val,
ich9_pm_set_s4_val,
NULL, pm, NULL);
}
void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp)
{
if (pm->acpi_memory_hotplug.is_enabled &&
object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
acpi_memory_plug_cb(&pm->acpi_regs, pm->irq, &pm->acpi_memory_hotplug,
dev, errp);
} else if (object_dynamic_cast(OBJECT(dev), TYPE_CPU)) {
acpi_cpu_plug_cb(&pm->acpi_regs, pm->irq, &pm->gpe_cpu, dev, errp);
} else {
error_setg(errp, "acpi: device plug request for not supported device"
" type: %s", object_get_typename(OBJECT(dev)));
}
}
void ich9_pm_device_unplug_request_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
Error **errp)
{
error_setg(errp, "acpi: device unplug request for not supported device"
" type: %s", object_get_typename(OBJECT(dev)));
}
void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
Error **errp)
{
error_setg(errp, "acpi: device unplug for not supported device"
" type: %s", object_get_typename(OBJECT(dev)));
}
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);
}
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