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lib: sbi: sse: return SBI_ENOTSUPP for unsupported events

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If a standard event was not found in the list of events that are handled
by harts but belongs to the standard event list defined by the
specification, return SBI_ENOTSUPP. Without that, we can not
distinguish a non implemented standard event from a non valid one.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Clément Léger
2025-01-10 14:15:55 +01:00
committed by Anup Patel
parent 93f7d819fd
commit ecab71e19a
1 changed files with 30 additions and 0 deletions
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30
lib/sbi/sbi_sse.c
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@@ -190,6 +190,31 @@ struct sse_event_info local_software_event = {
static SBI_SLIST_HEAD(supported_events, sse_event_info) =
SBI_SLIST_HEAD_INIT(&local_software_event);
/*
* This array is used to distinguish between standard event and platform
* events in order to return SBI_ERR_NOT_SUPPORTED for them.
*/
static const uint32_t standard_events[] = {
SBI_SSE_EVENT_LOCAL_RAS,
SBI_SSE_EVENT_LOCAL_DOUBLE_TRAP,
SBI_SSE_EVENT_GLOBAL_RAS,
SBI_SSE_EVENT_LOCAL_PMU,
SBI_SSE_EVENT_LOCAL_SOFTWARE,
SBI_SSE_EVENT_GLOBAL_SOFTWARE,
};
static bool sse_is_standard_event(uint32_t event_id)
{
int i;
for (i = 0; i < array_size(standard_events); i++) {
if (event_id == standard_events[i])
return true;
}
return false;
}
static struct sse_event_info *sse_event_info_get(uint32_t event_id)
{
struct sse_event_info *info;
@@ -295,6 +320,11 @@ static int sse_event_get(uint32_t event_id, struct sbi_sse_event **eret)
}
}
/* Check if the event is a standard one but not supported */
if (sse_is_standard_event(event_id))
return SBI_ENOTSUPP;
/* If not supported nor a standard event, it is invalid */
return SBI_EINVAL;
}