于 2012/2/20 0:21, Jiang Liu 写道:
On 02/17/2012 03:11 PM, Chen Gong wrote:Some APEI firmware implementation will access injected address specified in param1 to trigger the error when injecting memory error, which means if one SRAR error is injected, the crash always happens because it is executed in kernel context. This new parameter can disable trigger action and control is taken over by the user. In this way, an SRAR error can happen in user context instead of crashing the system. This function is highly depended on BIOS implementation so please ensure you know the BIOS trigger procedure before you enable this switch. v2: notrigger should be created together with param1/param2 Tested-by: Tony Luck<tony.luck@xxxxxxxxxx> Signed-off-by: Chen Gong<gong.chen@xxxxxxxxxxxxxxx> --- drivers/acpi/apei/einj.c | 15 ++++++++++++--- 1 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c index 4ca087d..afc380c 100644 --- a/drivers/acpi/apei/einj.c +++ b/drivers/acpi/apei/einj.c @@ -74,6 +74,8 @@ struct vendor_error_type_extension { u8 reserved[3]; }; +static u32 notrigger; + static u32 vendor_flags; static struct debugfs_blob_wrapper vendor_blob; static char vendor_dev[64]; @@ -496,9 +498,11 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2) if (rc) return rc; trigger_paddr = apei_exec_ctx_get_output(&ctx); - rc = __einj_error_trigger(trigger_paddr, type, param1, param2); - if (rc) - return rc; + if (notrigger == 0) { + rc = __einj_error_trigger(trigger_paddr, type, param1, param2); + if (rc) + return rc; + } rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION);Suggest to reset the notrigger flag to default value (zero) after the injection operation, so the test script doesn't need to explicitly set the notrigger flag for each injection operation and it's backward compatible with existing scripts. It would be better to reset the param2 too for the same reason.
I ever thought about this question, but it looks current implementation is established by usage so I don't think it needs to be fixed, otherwise it has strong requirement. As for the scripts, I assume you point to mce-test, I will update them after this patch is merged into the kernel. Thx for your comments. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
