[PATCH v2 08/13] acpi: generic event device for x86

[Gerd Hoffmann <kraxel@redhat.com>]

Uses TYPE_ACPI_GED as QOM parent for code reuse.
Add registers for sleep states and reset.
Add powerdown notifier for power button events.
Set AcpiDeviceIfClass->madt_cpu.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/hw/acpi/generic_event_device.h |  10 +++
 hw/i386/generic_event_device_x86.c     | 114 +++++++++++++++++++++++++
 hw/i386/Makefile.objs                  |   1 +
 3 files changed, 125 insertions(+)
 create mode 100644 hw/i386/generic_event_device_x86.c

diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
index 9eb86ca4fd94..16d1f2b3cd30 100644
--- a/include/hw/acpi/generic_event_device.h
+++ b/include/hw/acpi/generic_event_device.h
@@ -68,9 +68,19 @@
 #define ACPI_GED(obj) \
     OBJECT_CHECK(AcpiGedState, (obj), TYPE_ACPI_GED)
 
+#define TYPE_ACPI_GED_X86 "acpi-ged-x86"
+#define ACPI_GED_X86(obj) \
+    OBJECT_CHECK(AcpiGedX86State, (obj), TYPE_ACPI_GED_X86)
+
 #define ACPI_GED_EVT_SEL_OFFSET    0x0
 #define ACPI_GED_EVT_SEL_LEN       0x4
 
+#define ACPI_GED_X86_REG_SLEEP_CTL 0x00
+#define ACPI_GED_X86_REG_SLEEP_STS 0x01
+#define ACPI_GED_X86_REG_RESET     0x02
+#define   ACPI_GED_X86_RESET_VALUE 0x42
+#define ACPI_GED_X86_REG_COUNT     0x03
+
 #define GED_DEVICE      "GED"
 #define AML_GED_EVT_REG "EREG"
 #define AML_GED_EVT_SEL "ESEL"
diff --git a/hw/i386/generic_event_device_x86.c b/hw/i386/generic_event_device_x86.c
new file mode 100644
index 000000000000..8ae4a63084f3
--- /dev/null
+++ b/hw/i386/generic_event_device_x86.c
@@ -0,0 +1,114 @@
+/*
+ * x86 variant of the generic event device for hw reduced acpi
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "exec/address-spaces.h"
+#include "hw/acpi/acpi.h"
+#include "hw/acpi/generic_event_device.h"
+#include "hw/i386/pc.h"
+#include "hw/irq.h"
+#include "hw/mem/pc-dimm.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "qemu/error-report.h"
+#include "sysemu/runstate.h"
+
+typedef struct AcpiGedX86State {
+    struct AcpiGedState parent_obj;
+    MemoryRegion regs;
+    Notifier powerdown_req;
+} AcpiGedX86State;
+
+static uint64_t acpi_ged_x86_regs_read(void *opaque, hwaddr addr, unsigned size)
+{
+    return 0;
+}
+
+static void acpi_ged_x86_regs_write(void *opaque, hwaddr addr, uint64_t data,
+                                    unsigned int size)
+{
+    bool slp_en;
+    int slp_typ;
+
+    switch (addr) {
+    case ACPI_GED_X86_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_X86_REG_SLEEP_STS:
+        return;
+    case ACPI_GED_X86_REG_RESET:
+        if (data == ACPI_GED_X86_RESET_VALUE) {
+            qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
+        }
+        return;
+    }
+}
+
+static const MemoryRegionOps acpi_ged_x86_regs_ops = {
+    .read = acpi_ged_x86_regs_read,
+    .write = acpi_ged_x86_regs_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .valid = {
+        .min_access_size = 1,
+        .max_access_size = 1,
+    },
+};
+
+static void acpi_ged_x86_powerdown_req(Notifier *n, void *opaque)
+{
+    AcpiGedX86State *s = container_of(n, AcpiGedX86State, powerdown_req);
+    AcpiDeviceIf *adev = ACPI_DEVICE_IF(s);
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(OBJECT(s));
+
+    adevc->send_event(adev, ACPI_POWER_DOWN_STATUS);
+}
+
+static void acpi_ged_x86_initfn(Object *obj)
+{
+    AcpiGedX86State *s = ACPI_GED_X86(obj);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+
+    memory_region_init_io(&s->regs, obj, &acpi_ged_x86_regs_ops,
+                          obj, "acpi-regs", ACPI_GED_X86_REG_COUNT);
+    sysbus_init_mmio(sbd, &s->regs);
+
+    s->powerdown_req.notify = acpi_ged_x86_powerdown_req;
+    qemu_register_powerdown_notifier(&s->powerdown_req);
+}
+
+static void acpi_ged_x86_class_init(ObjectClass *class, void *data)
+{
+    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_CLASS(class);
+
+    adevc->madt_cpu = pc_madt_cpu_entry;
+}
+
+static const TypeInfo acpi_ged_x86_info = {
+    .name          = TYPE_ACPI_GED_X86,
+    .parent        = TYPE_ACPI_GED,
+    .instance_size = sizeof(AcpiGedX86State),
+    .instance_init  = acpi_ged_x86_initfn,
+    .class_init    = acpi_ged_x86_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_HOTPLUG_HANDLER },
+        { TYPE_ACPI_DEVICE_IF },
+        { }
+    }
+};
+
+static void acpi_ged_x86_register_types(void)
+{
+    type_register_static(&acpi_ged_x86_info);
+}
+
+type_init(acpi_ged_x86_register_types)
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index 6abc74551a72..622739305882 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -17,4 +17,5 @@ obj-$(CONFIG_PC) += port92.o
 
 obj-y += kvmvapic.o
 obj-$(CONFIG_ACPI) += acpi-common.o
+obj-$(CONFIG_ACPI_HW_REDUCED) += generic_event_device_x86.o
 obj-$(CONFIG_PC) += acpi-build.o
-- 
2.18.4