[PATCH v4 08/14] acpi/generic_event_device: add logic to detect if HEST addr is available

Mauro Carvalho Chehab
2025-02-21T14:35:36Z

Create a new property (x-has-hest-addr) and use it to detect if
the GHES table offsets can be calculated from the HEST address
(qemu 10.0 and upper) or via the legacy way via an offset obtained
from the hardware_errors firmware file.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
hw/acpi/generic_event_device.c | 1 +
hw/arm/virt-acpi-build.c | 18 ++++++++++++++++--
hw/core/machine.c | 2 ++
3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/hw/acpi/generic_event_device.c b/hw/acpi/generic_event_device.c
index 5346cae573b7..14d8513a5440 100644
--- a/hw/acpi/generic_event_device.c
+++ b/hw/acpi/generic_event_device.c
@@ -318,6 +318,7 @@ static void acpi_ged_send_event(AcpiDeviceIf *adev, AcpiEventStatusBits ev)

static const Property acpi_ged_properties[] = {
DEFINE_PROP_UINT32("ged-event", AcpiGedState, ged_event_bitmap, 0),
+ DEFINE_PROP_BOOL("x-has-hest-addr", AcpiGedState, ghes_state.use_hest_addr, false),
};

static const VMStateDescription vmstate_memhp_state = {
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 4439252e1a75..9de51105a513 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -897,6 +897,10 @@ static const AcpiNotificationSourceId hest_ghes_notify[] = {
{ ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA },
};

+static const AcpiNotificationSourceId hest_ghes_notify_9_2[] = {
+ { ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA },
+};
+
static
void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
{
@@ -950,7 +954,9 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
build_dbg2(tables_blob, tables->linker, vms);

if (vms->ras) {
+ static const AcpiNotificationSourceId *notify;
AcpiGedState *acpi_ged_state;
+ unsigned int notify_sz;
AcpiGhesState *ags;

acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
@@ -959,9 +965,17 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
ags = &acpi_ged_state->ghes_state;

acpi_add_table(table_offsets, tables_blob);
+
+ if (!ags->use_hest_addr) {
+ notify = hest_ghes_notify_9_2;
+ notify_sz = ARRAY_SIZE(hest_ghes_notify_9_2);
+ } else {
+ notify = hest_ghes_notify;
+ notify_sz = ARRAY_SIZE(hest_ghes_notify);
+ }
+
acpi_build_hest(ags, tables_blob, tables->hardware_errors,
- tables->linker, hest_ghes_notify,
- ARRAY_SIZE(hest_ghes_notify),
+ tables->linker, notify, notify_sz,
vms->oem_id, vms->oem_table_id);
}
}
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 02cff735b3fb..7a11e0f87b11 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -34,6 +34,7 @@
#include "hw/virtio/virtio-pci.h"
#include "hw/virtio/virtio-net.h"
#include "hw/virtio/virtio-iommu.h"
+#include "hw/acpi/generic_event_device.h"
#include "audio/audio.h"

GlobalProperty hw_compat_9_2[] = {
@@ -43,6 +44,7 @@ GlobalProperty hw_compat_9_2[] = {
{ "virtio-balloon-pci-non-transitional", "vectors", "0" },
{ "virtio-mem-pci", "vectors", "0" },
{ "migration", "multifd-clean-tls-termination", "false" },
+ { TYPE_ACPI_GED, "x-has-hest-addr", "false" },
};
const size_t hw_compat_9_2_len = G_N_ELEMENTS(hw_compat_9_2);

--
2.48.1