On Wed, 4 Dec 2024 08:41:22 +0100
Mauro Carvalho Chehab <mchehab+hua...@kernel.org> wrote:
> Currently, CPER address location is calculated as an offset of
> the hardware_errors table. It is also badly named, as the
> offset actually used is the address where the CPER data starts,
> and not the beginning of the error source.
>
> Move the logic which calculates such offset to a separate
> function, in preparation for a patch that will be changing the
> logic to calculate it from the HEST table.
>
> While here, properly name the variable which stores the cper
> address.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
> Reviewed-by: Jonathan Cameron <jonathan.came...@huawei.com>
Reviewed-by: Igor Mammedov <imamm...@redhat.com>
> ---
> hw/acpi/ghes.c | 40 +++++++++++++++++++++++++++++++---------
> 1 file changed, 31 insertions(+), 9 deletions(-)
>
> diff --git a/hw/acpi/ghes.c b/hw/acpi/ghes.c
> index 90d76b9c2d8c..a4453ee357bc 100644
> --- a/hw/acpi/ghes.c
> +++ b/hw/acpi/ghes.c
> @@ -364,10 +364,37 @@ void acpi_ghes_add_fw_cfg(AcpiGhesState *ags,
> FWCfgState *s,
> ags->present = true;
> }
>
> +static void get_hw_error_offsets(uint64_t ghes_addr,
> + uint64_t *cper_addr,
> + uint64_t *read_ack_register_addr)
> +{
> + if (!ghes_addr) {
> + return;
> + }
> +
> + /*
> + * non-HEST version supports only one source, so no need to change
> + * the start offset based on the source ID. Also, we can't validate
> + * the source ID, as it is stored inside the HEST table.
> + */
> +
> + cpu_physical_memory_read(ghes_addr, cper_addr,
> + sizeof(*cper_addr));
> +
> + *cper_addr = le64_to_cpu(*cper_addr);
> +
> + /*
> + * As the current version supports only one source, the ack offset is
> + * just sizeof(uint64_t).
> + */
> + *read_ack_register_addr = ghes_addr +
> + ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
> +}
> +
> void ghes_record_cper_errors(const void *cper, size_t len,
> uint16_t source_id, Error **errp)
> {
> - uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
> + uint64_t cper_addr = 0, read_ack_register_addr = 0, read_ack_register;
> uint64_t start_addr;
> AcpiGedState *acpi_ged_state;
> AcpiGhesState *ags;
> @@ -389,18 +416,13 @@ void ghes_record_cper_errors(const void *cper, size_t
> len,
>
> start_addr += source_id * sizeof(uint64_t);
>
> - cpu_physical_memory_read(start_addr, &error_block_addr,
> - sizeof(error_block_addr));
> + get_hw_error_offsets(start_addr, &cper_addr, &read_ack_register_addr);
>
> - error_block_addr = le64_to_cpu(error_block_addr);
> - if (!error_block_addr) {
> + if (!cper_addr) {
> error_setg(errp, "can not find Generic Error Status Block");
> return;
> }
>
> - read_ack_register_addr = start_addr +
> - ACPI_GHES_ERROR_SOURCE_COUNT * sizeof(uint64_t);
> -
> cpu_physical_memory_read(read_ack_register_addr,
> &read_ack_register, sizeof(read_ack_register));
>
> @@ -421,7 +443,7 @@ void ghes_record_cper_errors(const void *cper, size_t len,
> &read_ack_register, sizeof(uint64_t));
>
> /* Write the generic error data entry into guest memory */
> - cpu_physical_memory_write(error_block_addr, cper, len);
> + cpu_physical_memory_write(cper_addr, cper, len);
>
> return;
> }
