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[PATCH v7 04/21] acpi: ged: add control regs
From: |
Gerd Hoffmann |
Subject: |
[PATCH v7 04/21] acpi: ged: add control regs |
Date: |
Tue, 8 Sep 2020 14:10:33 +0200 |
Add control regs (sleep, reset) for hw-reduced acpi.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
---
include/hw/acpi/generic_event_device.h | 12 +++++++
hw/acpi/generic_event_device.c | 44 ++++++++++++++++++++++++++
2 files changed, 56 insertions(+)
diff --git a/include/hw/acpi/generic_event_device.h
b/include/hw/acpi/generic_event_device.h
index 90a9180db572..4533cddb486c 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -72,6 +72,17 @@
#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"
@@ -87,6 +98,7 @@
typedef struct GEDState {
MemoryRegion evt;
+ MemoryRegion regs;
uint32_t sel;
} GEDState;
diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index b8abdefa1c77..491df80a5cc7 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -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)
--
2.27.0
- [PATCH v7 00/21] microvm: add acpi support, Gerd Hoffmann, 2020/09/08
- [PATCH v7 02/21] seabios: add microvm config, update build rules, Gerd Hoffmann, 2020/09/08
- [PATCH v7 01/21] microvm: name qboot binary qboot.rom, Gerd Hoffmann, 2020/09/08
- [PATCH v7 04/21] acpi: ged: add control regs,
Gerd Hoffmann <=
- [PATCH v7 06/21] acpi: move acpi_dsdt_add_power_button() to ged, Gerd Hoffmann, 2020/09/08
- [PATCH v7 10/21] microvm/acpi: use GSI 16-23 for virtio, Gerd Hoffmann, 2020/09/08
- [PATCH v7 12/21] microvm/acpi: disable virtio-mmio cmdline hack, Gerd Hoffmann, 2020/09/08
- [PATCH v7 07/21] microvm: make virtio irq base runtime configurable, Gerd Hoffmann, 2020/09/08
- [PATCH v7 13/21] x86: constify x86_machine_is_*_enabled, Gerd Hoffmann, 2020/09/08
- [PATCH v7 16/21] microvm: wire up hotplug, Gerd Hoffmann, 2020/09/08
- [PATCH v7 05/21] acpi: ged: add x86 device variant., Gerd Hoffmann, 2020/09/08
- [PATCH v7 18/21] tests/acpi: allow override blkdev, Gerd Hoffmann, 2020/09/08
- [PATCH v7 21/21] microvm: enable ramfb, Gerd Hoffmann, 2020/09/08