On Thu, Jul 3, 2025 at 10:05 PM Tony Luck <tony.l...@intel.com> wrote:
>
> The trigger events are in BIOS memory immediately following the
> acpi_einj_trigger structure. These were not copied to regular
> kernel memory for use by apei_exec_ctx_init() so injections in
> "notrigger=0" mode failed with a message like this:
>
> APEI: Invalid action table, unknown instruction type: 123
>
> Fix by allocating a "table_size" block of memory and copying the whole
> table for use in the rest of the trigger flow.
>
> Fixes: 1a35c88302a3 ("ACPI: APEI: EINJ: Fix kernel test sparse warnings")
> Reported-by: Yi1 Lai <yi1....@intel.com>
> Signed-off-by: Tony Luck <tony.l...@intel.com>
> ---
> drivers/acpi/apei/einj-core.c | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
> index 3d37978418e8..bf8dc92a373a 100644
> --- a/drivers/acpi/apei/einj-core.c
> +++ b/drivers/acpi/apei/einj-core.c
> @@ -394,6 +394,7 @@ static int __einj_error_trigger(u64 trigger_paddr, u32
> type,
> u64 param1, u64 param2)
> {
> struct acpi_einj_trigger trigger_tab;
> + struct acpi_einj_trigger *full_trigger_tab;
> struct apei_exec_context trigger_ctx;
> struct apei_resources trigger_resources;
> struct acpi_whea_header *trigger_entry;
> @@ -430,6 +431,9 @@ static int __einj_error_trigger(u64 trigger_paddr, u32
> type,
>
> rc = -EIO;
> table_size = trigger_tab.table_size;
> + full_trigger_tab = kmalloc(table_size, GFP_KERNEL);
> + if (!full_trigger_tab)
> + goto out_rel_header;
> r = request_mem_region(trigger_paddr + sizeof(trigger_tab),
> table_size - sizeof(trigger_tab),
> "APEI EINJ Trigger Table");
> @@ -437,7 +441,7 @@ static int __einj_error_trigger(u64 trigger_paddr, u32
> type,
> pr_err("Can not request [mem %#010llx-%#010llx] for Trigger
> Table Entry\n",
> (unsigned long long)trigger_paddr +
> sizeof(trigger_tab),
> (unsigned long long)trigger_paddr + table_size - 1);
> - goto out_rel_header;
> + goto out_free_trigger_tab;
> }
> iounmap(p);
> p = ioremap_cache(trigger_paddr, table_size);
> @@ -445,9 +449,9 @@ static int __einj_error_trigger(u64 trigger_paddr, u32
> type,
> pr_err("Failed to map trigger table!\n");
> goto out_rel_entry;
> }
> - memcpy_fromio(&trigger_tab, p, sizeof(trigger_tab));
> + memcpy_fromio(full_trigger_tab, p, table_size);
> trigger_entry = (struct acpi_whea_header *)
> - ((char *)&trigger_tab + sizeof(struct acpi_einj_trigger));
> + ((char *)full_trigger_tab + sizeof(struct acpi_einj_trigger));
> apei_resources_init(&trigger_resources);
> apei_exec_ctx_init(&trigger_ctx, einj_ins_type,
> ARRAY_SIZE(einj_ins_type),
> @@ -469,7 +473,7 @@ static int __einj_error_trigger(u64 trigger_paddr, u32
> type,
>
> apei_resources_init(&addr_resources);
> trigger_param_region = einj_get_trigger_parameter_region(
> - &trigger_tab, param1, param2);
> + full_trigger_tab, param1, param2);
> if (trigger_param_region) {
> rc = apei_resources_add(&addr_resources,
> trigger_param_region->address,
> @@ -500,6 +504,8 @@ static int __einj_error_trigger(u64 trigger_paddr, u32
> type,
> out_rel_entry:
> release_mem_region(trigger_paddr + sizeof(trigger_tab),
> table_size - sizeof(trigger_tab));
> +out_free_trigger_tab:
> + kfree(full_trigger_tab);
> out_rel_header:
> release_mem_region(trigger_paddr, sizeof(trigger_tab));
> out:
> --
Applied, thanks!
