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Message-ID: <3f6b7e8499bf5911de9b1533e4b2a4addc207536.1731486604.git.mchehab+huawei@kernel.org>
Date: Wed, 13 Nov 2024 09:36:58 +0100
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Igor Mammedov <imammedo@...hat.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Shiju Jose <shiju.jose@...wei.com>,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
"Michael S. Tsirkin" <mst@...hat.com>,
Ani Sinha <anisinha@...hat.com>,
Dongjiu Geng <gengdongjiu1@...il.com>,
Peter Maydell <peter.maydell@...aro.org>,
Shannon Zhao <shannon.zhaosl@...il.com>,
linux-kernel@...r.kernel.org,
qemu-arm@...gnu.org,
qemu-devel@...gnu.org
Subject: [PATCH 1/6] acpi/ghes: Prepare to support multiple sources on ghes
The current code is actually dependent on having just one
error structure with a single source.
As the number of sources should be arch-dependent, as it
will depend on what kind of synchronous/assynchronous
notifications will exist, change the logic to dynamically
build the table.
Yet, for a proper support, we need to get the number of
sources by reading the number from the HEST table. However,
bios currently doesn't store a pointer to it.
For now just change the logic at table build time, while
enforcing that it will behave like before with a single
source ID.
A future patch will add a HEST table bios pointer and
change the logic at acpi_ghes_record_errors() to
dynamically use the new size.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
---
hw/acpi/ghes.c | 43 ++++++++++++++++++++++++++--------------
hw/arm/virt-acpi-build.c | 5 +++++
include/hw/acpi/ghes.h | 21 +++++++++++++-------
3 files changed, 47 insertions(+), 22 deletions(-)
diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
index e7de3b302602..a590b0f6f85f 100644
--- a/hw/acpi/ghes.c
+++ b/hw/acpi/ghes.c
@@ -212,17 +212,26 @@ ghes_gen_err_data_uncorrectable_recoverable(GArray *block,
* Initialize "etc/hardware_errors" and "etc/hardware_errors_addr" fw_cfg blobs.
* See docs/specs/acpi_hest_ghes.rst for blobs format.
*/
-static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
+static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker,
+ int num_sources)
{
int i, error_status_block_offset;
+ /*
+ * TODO: Current version supports only one source.
+ * A further patch will drop this check, after adding a proper migration
+ * code, as, for the code to work, we need to store a bios pointer to the
+ * HEST table.
+ */
+ assert(num_sources == 1);
+
/* Build error_block_address */
- for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+ for (i = 0; i < num_sources; i++) {
build_append_int_noprefix(hardware_errors, 0, sizeof(uint64_t));
}
/* Build read_ack_register */
- for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+ for (i = 0; i < num_sources; i++) {
/*
* Initialize the value of read_ack_register to 1, so GHES can be
* writable after (re)boot.
@@ -237,13 +246,13 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
/* Reserve space for Error Status Data Block */
acpi_data_push(hardware_errors,
- ACPI_GHES_MAX_RAW_DATA_LENGTH * ACPI_GHES_ERROR_SOURCE_COUNT);
+ ACPI_GHES_MAX_RAW_DATA_LENGTH * num_sources);
/* Tell guest firmware to place hardware_errors blob into RAM */
bios_linker_loader_alloc(linker, ACPI_HW_ERROR_FW_CFG_FILE,
hardware_errors, sizeof(uint64_t), false);
- for (i = 0; i < ACPI_GHES_ERROR_SOURCE_COUNT; i++) {
+ for (i = 0; i < num_sources; i++) {
/*
* Tell firmware to patch error_block_address entries to point to
* corresponding "Generic Error Status Block"
@@ -269,10 +278,12 @@ static void build_ghes_error_table(GArray *hardware_errors, BIOSLinker *linker)
/* Build Generic Hardware Error Source version 2 (GHESv2) */
static void build_ghes_v2(GArray *table_data,
BIOSLinker *linker,
- enum AcpiGhesNotifyType notify,
- uint16_t source_id)
+ const AcpiNotificationSourceId *notif_src,
+ uint16_t index, int num_sources)
{
uint64_t address_offset;
+ const uint16_t notify = notif_src->notify;
+ const uint16_t source_id = notif_src->source_id;
/*
* Type:
@@ -303,7 +314,7 @@ static void build_ghes_v2(GArray *table_data,
address_offset + GAS_ADDR_OFFSET,
sizeof(uint64_t),
ACPI_HW_ERROR_FW_CFG_FILE,
- source_id * sizeof(uint64_t));
+ index * sizeof(uint64_t));
/* Notification Structure */
build_ghes_hw_error_notification(table_data, notify);
@@ -323,8 +334,7 @@ static void build_ghes_v2(GArray *table_data,
address_offset + GAS_ADDR_OFFSET,
sizeof(uint64_t),
ACPI_HW_ERROR_FW_CFG_FILE,
- (ACPI_GHES_ERROR_SOURCE_COUNT + source_id)
- * sizeof(uint64_t));
+ (num_sources + index) * sizeof(uint64_t));
/*
* Read Ack Preserve field
@@ -339,19 +349,23 @@ static void build_ghes_v2(GArray *table_data,
/* Build Hardware Error Source Table */
void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
BIOSLinker *linker,
+ const AcpiNotificationSourceId * const notif_source,
+ int num_sources,
const char *oem_id, const char *oem_table_id)
{
AcpiTable table = { .sig = "HEST", .rev = 1,
.oem_id = oem_id, .oem_table_id = oem_table_id };
+ int i;
- build_ghes_error_table(hardware_errors, linker);
+ build_ghes_error_table(hardware_errors, linker, num_sources);
acpi_table_begin(&table, table_data);
/* Error Source Count */
- build_append_int_noprefix(table_data, ACPI_GHES_ERROR_SOURCE_COUNT, 4);
- build_ghes_v2(table_data, linker,
- ACPI_GHES_NOTIFY_SEA, ACPI_HEST_SRC_ID_SEA);
+ build_append_int_noprefix(table_data, num_sources, 4);
+ for (i = 0; i < num_sources; i++) {
+ build_ghes_v2(table_data, linker, ¬if_source[i], i, num_sources);
+ }
acpi_table_end(linker, &table);
}
@@ -416,7 +430,6 @@ void ghes_record_cper_errors(const void *cper, size_t len,
}
ags = &acpi_ged_state->ghes_state;
- assert(ACPI_GHES_ERROR_SOURCE_COUNT == 1);
get_ghes_offsets(le64_to_cpu(ags->hw_error_le), &cper_addr, &read_ack_register_addr);
cper_addr = le64_to_cpu(cper_addr);
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index e059317b002e..40f66792570c 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -889,6 +889,10 @@ static void acpi_align_size(GArray *blob, unsigned align)
g_array_set_size(blob, ROUND_UP(acpi_data_len(blob), align));
}
+static const AcpiNotificationSourceId hest_ghes_notify[] = {
+ {ACPI_HEST_SRC_ID_SYNC, ACPI_GHES_NOTIFY_SEA},
+};
+
static
void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
{
@@ -944,6 +948,7 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
if (vms->ras) {
acpi_add_table(table_offsets, tables_blob);
acpi_build_hest(tables_blob, tables->hardware_errors, tables->linker,
+ hest_ghes_notify, ARRAY_SIZE(hest_ghes_notify),
vms->oem_id, vms->oem_table_id);
}
diff --git a/include/hw/acpi/ghes.h b/include/hw/acpi/ghes.h
index 9a765edb27ef..e47ffacbb5c9 100644
--- a/include/hw/acpi/ghes.h
+++ b/include/hw/acpi/ghes.h
@@ -57,20 +57,27 @@ enum AcpiGhesNotifyType {
ACPI_GHES_NOTIFY_RESERVED = 12
};
-enum {
- ACPI_HEST_SRC_ID_SEA = 0,
- /* future ids go here */
-
- ACPI_GHES_ERROR_SOURCE_COUNT
-};
-
typedef struct AcpiGhesState {
uint64_t hw_error_le;
bool present; /* True if GHES is present at all on this board */
} AcpiGhesState;
+/*
+ * ID numbers used to fill HEST source ID field
+ */
+enum AcpiGhesSourceID {
+ ACPI_HEST_SRC_ID_SYNC,
+};
+
+typedef struct AcpiNotificationSourceId {
+ enum AcpiGhesSourceID source_id;
+ enum AcpiGhesNotifyType notify;
+} AcpiNotificationSourceId;
+
void acpi_build_hest(GArray *table_data, GArray *hardware_errors,
BIOSLinker *linker,
+ const AcpiNotificationSourceId * const notif_source,
+ int num_sources,
const char *oem_id, const char *oem_table_id);
void acpi_ghes_add_fw_cfg(AcpiGhesState *vms, FWCfgState *s,
GArray *hardware_errors);
--
2.47.0
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