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Re: [PATCH v3 10/22] acpi: ged: add control regs
From: |
Igor Mammedov |
Subject: |
Re: [PATCH v3 10/22] acpi: ged: add control regs |
Date: |
Thu, 21 May 2020 10:58:29 +0200 |
On Wed, 20 May 2020 15:19:51 +0200
Gerd Hoffmann <address@hidden> wrote:
> Add control regs (sleep, reset) for hw-reduced acpi.
>
> Signed-off-by: Gerd Hoffmann <address@hidden>
this should be acompanied by docs update
docs/specs/acpi_hw_reduced_hotplug.rst
to document new registers and their semantics
and probaly rename file to something more appropriate
> ---
> include/hw/acpi/generic_event_device.h | 7 ++++
> hw/acpi/generic_event_device.c | 44 ++++++++++++++++++++++++++
> 2 files changed, 51 insertions(+)
>
> diff --git a/include/hw/acpi/generic_event_device.h
> b/include/hw/acpi/generic_event_device.h
> index 90a9180db572..474c92198080 100644
> --- a/include/hw/acpi/generic_event_device.h
> +++ b/include/hw/acpi/generic_event_device.h
> @@ -72,6 +72,12 @@
> #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_RESET_VALUE 0x42
> +#define ACPI_GED_REG_COUNT 0x03
> +
> #define GED_DEVICE "GED"
> #define AML_GED_EVT_REG "EREG"
> #define AML_GED_EVT_SEL "ESEL"
> @@ -87,6 +93,7 @@
>
> 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 1cb34111e59a..3072fb4ab32b 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)
> {
> @@ -305,6 +345,10 @@ 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)
- Re: [PATCH v3 12/22] acpi: move acpi_dsdt_add_power_button() to ged, (continued)
- [PATCH v3 17/22] microvm/acpi: add acpi_dsdt_add_virtio() for x86, Gerd Hoffmann, 2020/05/20
- [PATCH v3 19/22] microvm/acpi: use seabios with acpi=on, Gerd Hoffmann, 2020/05/20
- [PATCH v3 05/22] acpi: make build_madt() more generic., Gerd Hoffmann, 2020/05/20
- [PATCH v3 18/22] microvm/acpi: use GSI 16-23 for virtio, Gerd Hoffmann, 2020/05/20
- [PATCH v3 10/22] acpi: ged: add control regs, Gerd Hoffmann, 2020/05/20
- Re: [PATCH v3 10/22] acpi: ged: add control regs,
Igor Mammedov <=
- [PATCH v3 16/22] microvm/acpi: add minimal acpi support, Gerd Hoffmann, 2020/05/20
- [PATCH v3 21/22] [RfC] acpi: add per machine type acpi default, Gerd Hoffmann, 2020/05/20
- [PATCH v3 20/22] microvm/acpi: disable virtio-mmio cmdline hack, Gerd Hoffmann, 2020/05/20
- [PATCH v3 11/22] acpi: ged: add x86 device variant., Gerd Hoffmann, 2020/05/20
- [PATCH v3 22/22] [RfC] acpi: flip default to off for microvm, Gerd Hoffmann, 2020/05/20