On Fri, 16 Aug 2024 09:37:38 +0200
Mauro Carvalho Chehab <mchehab+hua...@kernel.org> wrote:
> Provide a generic interface for error injection via GHESv2.
>
> This patch is co-authored:
> - original ghes logic to inject a simple ARM record by Shiju Jose;
> - generic logic to handle block addresses by Jonathan Cameron;
> - generic GHESv2 error inject by Mauro Carvalho Chehab;
>
> Co-authored-by: Jonathan Cameron <jonathan.came...@huawei.com>
> Co-authored-by: Shiju Jose <shiju.j...@huawei.com>
> Co-authored-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
> Signed-off-by: Jonathan Cameron <jonathan.came...@huawei.com>
> Signed-off-by: Shiju Jose <shiju.j...@huawei.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
> ---
> hw/acpi/ghes.c | 57 +++++++++++++++++++++++++++++++++++++++++++++
> hw/acpi/ghes_cper.c | 2 +-
> 2 files changed, 58 insertions(+), 1 deletion(-)
>
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 7870f51e2a9e..a3ae710dcf81 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -500,6 +500,63 @@ int acpi_ghes_record_errors(enum AcpiGhesNotifyType
> notify,
> NotifierList acpi_generic_error_notifiers =
> NOTIFIER_LIST_INITIALIZER(error_device_notifiers);
>
> +void ghes_record_cper_errors(uint8_t *cper, size_t len,
> + enum AcpiGhesNotifyType notify, Error **errp)
> +{
> + uint64_t cper_addr, read_ack_start_addr;
> + enum AcpiHestSourceId source;
> + AcpiGedState *acpi_ged_state;
> + AcpiGhesState *ags;
> + uint64_t read_ack;
> +
> + if (ghes_notify_to_source_id(notify, &source)) {
> + error_setg(errp,
> + "GHES: Invalid error block/ack address(es) for notify %d",
> + notify);
> + return;
> + }
> +
> + acpi_ged_state = ACPI_GED(object_resolve_path_type("", TYPE_ACPI_GED,
> + NULL));
> + g_assert(acpi_ged_state);
> + ags = &acpi_ged_state->ghes_state;
> +
> + cper_addr = le64_to_cpu(ags->ghes_addr_le);
^^^ suggest to rename to error_block_address
that way reader can easily match it with spec.
> + cper_addr += ACPI_HEST_SRC_ID_COUNT * sizeof(uint64_t);
and it would be better to merge this with previous line to be more clear
+ to avoid shifting meaning of variable between lines.
> + read_ack_start_addr = cper_addr + source * sizeof(uint64_t);
> + cper_addr += ACPI_HEST_SRC_ID_COUNT * sizeof(uint64_t);
> + cper_addr += source * ACPI_GHES_MAX_RAW_DATA_LENGTH;
I'd avoid changing meaning of variable, it adds up to confusion.
Anyway, what the point of of above math?
> +
> + cpu_physical_memory_read(read_ack_start_addr,
> + &read_ack, sizeof(uint64_t));
s/sizeof(uint64_t)/sizeof(read_ack)/
ditto elsewhere
> +
> + /* zero means OSPM does not acknowledge the error */
> + if (!read_ack) {
> + error_setg(errp,
> + "Last CPER record was not acknowledged yet");
> + read_ack = 1;
> + cpu_physical_memory_write(read_ack_start_addr,
> + &read_ack, (uint64_t));
we don't do this for SEV so, why are you setting it to 1 here?
> + return;
> + }
> +
> + read_ack = cpu_to_le64(0);
> + cpu_physical_memory_write(read_ack_start_addr,
> + &read_ack, sizeof(uint64_t));
> +
> + /* Build CPER record */
> +
> + if (len > ACPI_GHES_MAX_RAW_DATA_LENGTH) {
> + error_setg(errp, "GHES CPER record is too big: %ld", len);
> + }
move check at start of function?
> +
> + /* Write the generic error data entry into guest memory */
> + cpu_physical_memory_write(cper_addr, cper, len);
> +
> + notifier_list_notify(&acpi_generic_error_notifiers, NULL);
> +}
> +
> bool acpi_ghes_present(void)
> {
> AcpiGedState *acpi_ged_state;
> diff --git a/hw/acpi/ghes_cper.c b/hw/acpi/ghes_cper.c
> index 92ca84d738de..2328dbff7012 100644
> --- a/hw/acpi/ghes_cper.c
> +++ b/hw/acpi/ghes_cper.c
> @@ -29,5 +29,5 @@ void qmp_ghes_cper(const char *qmp_cper,
> return;
> }
>
> - /* TODO: call a function at ghes */
> + ghes_record_cper_errors(cper, len, ACPI_GHES_NOTIFY_GPIO, errp);
> }
