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Message-ID: <20250128184202.14778f27@foz.lan>
Date: Tue, 28 Jan 2025 18:42:02 +0100
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Igor Mammedov <imammedo@...hat.com>
Cc: "Michael S . Tsirkin" <mst@...hat.com>, Jonathan Cameron
<Jonathan.Cameron@...wei.com>, Shiju Jose <shiju.jose@...wei.com>,
qemu-arm@...gnu.org, qemu-devel@...gnu.org, Ani Sinha
<anisinha@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/11] acpi/generic_event_device: add an APEI error
device
Em Fri, 24 Jan 2025 13:30:54 +0100
Igor Mammedov <imammedo@...hat.com> escreveu:
> On Wed, 22 Jan 2025 16:46:25 +0100
> Mauro Carvalho Chehab <mchehab+huawei@...nel.org> wrote:
>
> > Adds a generic error device to handle generic hardware error
> > events as specified at ACPI 6.5 specification at 18.3.2.7.2:
> > https://uefi.org/specs/ACPI/6.5/18_Platform_Error_Interfaces.html#event-notification-for-generic-error-sources
> > using HID PNP0C33.
> >
> > The PNP0C33 device is used to report hardware errors to
> > the guest via ACPI APEI Generic Hardware Error Source (GHES).
> >
> > Co-authored-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> > Co-authored-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> > Reviewed-by: Igor Mammedov <imammedo@...hat.com>
> > ---
> > hw/acpi/aml-build.c | 10 ++++++++++
> > hw/acpi/generic_event_device.c | 8 ++++++++
> > include/hw/acpi/acpi_dev_interface.h | 1 +
> > include/hw/acpi/aml-build.h | 2 ++
> > include/hw/acpi/generic_event_device.h | 1 +
> > 5 files changed, 22 insertions(+)
> >
> > diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> > index f8f93a9f66c8..e4bd7b611372 100644
> > --- a/hw/acpi/aml-build.c
> > +++ b/hw/acpi/aml-build.c
> > @@ -2614,3 +2614,13 @@ Aml *aml_i2c_serial_bus_device(uint16_t address, const char *resource_source)
> >
> > return var;
> > }
> > +
> > +/* ACPI 5.0b: 18.3.2.6.2 Event Notification For Generic Error Sources */
> > +Aml *aml_error_device(void)
> > +{
> > + Aml *dev = aml_device(ACPI_APEI_ERROR_DEVICE);
> > + aml_append(dev, aml_name_decl("_HID", aml_string("PNP0C33")));
> > + aml_append(dev, aml_name_decl("_UID", aml_int(0)));
> > +
> > + return dev;
> > +}
> > diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
> > index fe537ed05c66..ce00c80054f4 100644
> > --- a/hw/acpi/generic_event_device.c
> > +++ b/hw/acpi/generic_event_device.c
> > @@ -26,6 +26,7 @@ static const uint32_t ged_supported_events[] = {
> > ACPI_GED_PWR_DOWN_EVT,
> > ACPI_GED_NVDIMM_HOTPLUG_EVT,
> > ACPI_GED_CPU_HOTPLUG_EVT,
> > + ACPI_GED_ERROR_EVT,
> > };
> >
> > /*
> > @@ -116,6 +117,11 @@ void build_ged_aml(Aml *table, const char *name, HotplugHandler *hotplug_dev,
> > aml_notify(aml_name(ACPI_POWER_BUTTON_DEVICE),
> > aml_int(0x80)));
> > break;
> > + case ACPI_GED_ERROR_EVT:
> > + aml_append(if_ctx,
> > + aml_notify(aml_name(ACPI_APEI_ERROR_DEVICE),
> > + aml_int(0x80)));
> ^^^^^
> nit: perhaps add a comment with intent and ref to spec wrt above value
Will add this as with a define:
/*
* ACPI 5.0b: 5.6.6 Device Object Notifications
* Table 5-135 Error Device Notification Values
*/
#define ERROR_DEVICE_NOTIFICATION 0x80
(the spec here is the same as we used on this patch for aml_error_device()
function)
>
> > + break;
> > case ACPI_GED_NVDIMM_HOTPLUG_EVT:
> > aml_append(if_ctx,
> > aml_notify(aml_name("\\_SB.NVDR"),
> > @@ -295,6 +301,8 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)
> > sel = ACPI_GED_MEM_HOTPLUG_EVT;
> > } else if (ev & ACPI_POWER_DOWN_STATUS) {
> > sel = ACPI_GED_PWR_DOWN_EVT;
> > + } else if (ev & ACPI_GENERIC_ERROR) {
> > + sel = ACPI_GED_ERROR_EVT;
> > } else if (ev & ACPI_NVDIMM_HOTPLUG_STATUS) {
> > sel = ACPI_GED_NVDIMM_HOTPLUG_EVT;
> > } else if (ev & ACPI_CPU_HOTPLUG_STATUS) {
> > diff --git a/include/hw/acpi/acpi_dev_interface.h b/include/hw/acpi/acpi_dev_interface.h
> > index 68d9d15f50aa..8294f8f0ccca 100644
> > --- a/include/hw/acpi/acpi_dev_interface.h
> > +++ b/include/hw/acpi/acpi_dev_interface.h
> > @@ -13,6 +13,7 @@ typedef enum {
> > ACPI_NVDIMM_HOTPLUG_STATUS = 16,
> > ACPI_VMGENID_CHANGE_STATUS = 32,
> > ACPI_POWER_DOWN_STATUS = 64,
> > + ACPI_GENERIC_ERROR = 128,
> > } AcpiEventStatusBits;
> >
> > #define TYPE_ACPI_DEVICE_IF "acpi-device-interface"
> > diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> > index c18f68134246..f38e12971932 100644
> > --- a/include/hw/acpi/aml-build.h
> > +++ b/include/hw/acpi/aml-build.h
> > @@ -252,6 +252,7 @@ struct CrsRangeSet {
> > /* Consumer/Producer */
> > #define AML_SERIAL_BUS_FLAG_CONSUME_ONLY (1 << 1)
> >
> > +#define ACPI_APEI_ERROR_DEVICE "GEDD"
> > /**
> > * init_aml_allocator:
> > *
> > @@ -382,6 +383,7 @@ Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz,
> > uint8_t channel);
> > Aml *aml_sleep(uint64_t msec);
> > Aml *aml_i2c_serial_bus_device(uint16_t address, const char *resource_source);
> > +Aml *aml_error_device(void);
> >
> > /* Block AML object primitives */
> > Aml *aml_scope(const char *name_format, ...) G_GNUC_PRINTF(1, 2);
> > diff --git a/include/hw/acpi/generic_event_device.h b/include/hw/acpi/generic_event_device.h
> > index d2dac87b4a9f..1c18ac296fcb 100644
> > --- a/include/hw/acpi/generic_event_device.h
> > +++ b/include/hw/acpi/generic_event_device.h
> > @@ -101,6 +101,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(AcpiGedState, ACPI_GED)
> > #define ACPI_GED_PWR_DOWN_EVT 0x2
> > #define ACPI_GED_NVDIMM_HOTPLUG_EVT 0x4
> > #define ACPI_GED_CPU_HOTPLUG_EVT 0x8
> > +#define ACPI_GED_ERROR_EVT 0x10
> >
> > typedef struct GEDState {
> > MemoryRegion evt;
>
Thanks,
Mauro
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