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acpi: ged: add control regs 

Add control regs (sleep, reset) for hw-reduced acpi.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20200915120909.20838-5-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2020-09-15 14:08:52 +02:00
parent 38edb514c9
commit 14404dd2d1
2 changed files with 56 additions and 0 deletions
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44
hw/acpi/generic_event_device.c
View File

@ -20,6 +20,7 @@
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "qemu/error-report.h"
#include "sysemu/runstate.h"
static const uint32_t ged_supported_events[] = {
ACPI_GED_MEM_HOTPLUG_EVT,
@ -176,6 +177,45 @@ static const MemoryRegionOps ged_evt_ops = {
},
};
static uint64_t ged_regs_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void ged_regs_write(void *opaque, hwaddr addr, uint64_t data,
unsigned int size)
{
bool slp_en;
int slp_typ;
switch (addr) {
case ACPI_GED_REG_SLEEP_CTL:
slp_typ = (data >> 2) & 0x07;
slp_en = (data >> 5) & 0x01;
if (slp_en && slp_typ == 5) {
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}
return;
case ACPI_GED_REG_SLEEP_STS:
return;
case ACPI_GED_REG_RESET:
if (data == ACPI_GED_RESET_VALUE) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}
return;
}
}
static const MemoryRegionOps ged_regs_ops = {
.read = ged_regs_read,
.write = ged_regs_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1,
},
};
static void acpi_ged_device_plug_cb(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
@ -332,6 +372,10 @@ static void acpi_ged_initfn(Object *obj)
sysbus_init_mmio(sbd, &s->container_memhp);
acpi_memory_hotplug_init(&s->container_memhp, OBJECT(dev),
&s->memhp_state, 0);
memory_region_init_io(&ged_st->regs, obj, &ged_regs_ops, ged_st,
TYPE_ACPI_GED "-regs", ACPI_GED_REG_COUNT);
sysbus_init_mmio(sbd, &ged_st->regs);
}
static void acpi_ged_class_init(ObjectClass *class, void *data)

12
include/hw/acpi/generic_event_device.h
View File

@ -74,6 +74,17 @@ DECLARE_INSTANCE_CHECKER(AcpiGedState, ACPI_GED,
#define ACPI_GED_EVT_SEL_OFFSET 0x0
#define ACPI_GED_EVT_SEL_LEN 0x4
#define ACPI_GED_REG_SLEEP_CTL 0x00
#define ACPI_GED_REG_SLEEP_STS 0x01
#define ACPI_GED_REG_RESET 0x02
#define ACPI_GED_REG_COUNT 0x03
/* ACPI_GED_REG_RESET value for reset*/
#define ACPI_GED_RESET_VALUE 0x42
/* ACPI_GED_REG_SLEEP_CTL.SLP_TYP value for S5 (aka poweroff) */
#define ACPI_GED_SLP_TYP_S5 0x05
#define GED_DEVICE "GED"
#define AML_GED_EVT_REG "EREG"
#define AML_GED_EVT_SEL "ESEL"
@ -89,6 +100,7 @@ DECLARE_INSTANCE_CHECKER(AcpiGedState, ACPI_GED,
typedef struct GEDState {
MemoryRegion evt;
MemoryRegion regs;
uint32_t sel;
} GEDState;