Tyler Baicar <tbaicar@xxxxxxxxxxxxxx> writes:
> ARM APEI extension proposal added SEA (Synchrounous External
> Abort) notification type for ARMv8.
> Add a new GHES error source handling function for SEA. If an error
> source's notification type is SEA, then this function can be registered
> into the SEA exception handler. That way GHES will parse and report
> SEA exceptions when they occur.
>
> Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@xxxxxxxxxxxxxx>
> Signed-off-by: Tyler Baicar <tbaicar@xxxxxxxxxxxxxx>
> Signed-off-by: Naveen Kaje <nkaje@xxxxxxxxxxxxxx>
This patch fails to apply for me on v4.8. Is there a different tree this
is based on?
One comment below.
[...]
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index c8488f1..28d5a09 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -50,6 +50,10 @@
> #include <acpi/apei.h>
> #include <asm/tlbflush.h>
>
> +#ifdef CONFIG_HAVE_ACPI_APEI_SEA
> +#include <asm/system_misc.h>
> +#endif
> +
> #include "apei-internal.h"
>
> #define GHES_PFX "GHES: "
> @@ -779,6 +783,62 @@ static struct notifier_block ghes_notifier_sci = {
> .notifier_call = ghes_notify_sci,
> };
>
> +#ifdef CONFIG_HAVE_ACPI_APEI_SEA
> +static LIST_HEAD(ghes_sea);
> +
> +static int ghes_notify_sea(struct notifier_block *this,
> + unsigned long event, void *data)
> +{
> + struct ghes *ghes;
> + int ret = NOTIFY_DONE;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(ghes, &ghes_sea, list) {
> + if (!ghes_proc(ghes))
> + ret = NOTIFY_OK;
Not something you've introduced but it looks like ghes_proc erroneously
never returns anything other than 0. I plan to post the below fix to
address it.
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 60746ef..caea575 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -662,7 +662,7 @@ static int ghes_proc(struct ghes *ghes)
ghes_do_proc(ghes, ghes->estatus);
out:
ghes_clear_estatus(ghes);
- return 0;
+ return rc;
}
> + }
> + rcu_read_unlock();
> +
> + return ret;
> +}
> +
[...]
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