sbsa-acs : RAS_03 can't validate the case where the first node is a SR node and the second node is a MMIO node

[sunnywang-arm]

The test now can not cover the case where SR-based RAS node is the first node, and MMIO-based RAS noe is the second node. RAS_03 test only iterates up to (num_node - 1), so if the SR-based node is first node, the second node may never be evaluated.

We may need to change the line https://github.com/ARM-software/sysarch-acs/blob/main/test_pool/ras/ras003.c#L57
and

sysarch-acs/test_pool/ras/ras003.c

Line 77 in f701455

for (sec_node = node_index + 1; sec_node < num_node; sec_node++) {

to remove the asumption that MMIO-based RAS node is always ahead SR-based RAS node.

[chetan-rathore]

@rajatgoyal47 Can you check and provide update on Sunny query

[rajatgoyal47]

Hi @sunnywang-arm

We do have one more for loop for next node at
https://github.com/ARM-software/sysarch-acs/blob/main/test_pool/ras/ras003.c#L77 which covers the last node as well.

We do compare all the nodes in group of 2.
Please let me know if any other comments.

[sunnywang-arm]

@rajatgoyal47 You're right. The issue is bigger than I thought. I updated the issue description.

[rajatgoyal47]

Hi @sunnywang-arm,

I was on leave last week.

As per the Rule, “each error record group implements a single Fault Handling Interrupt (FHI) for all records contained within the group.” Currently, we determine whether two error records belong to the same group by checking if they share the same base address.

However, I need to confirm my understanding on how this applies when one error record is System Register (SR) based and the other is MMIO based. Would such records be expected to reside within the same error record group, or are they treated as belonging to different groups?

[sunnywang-arm]

Hi @rajatgoyal47
RAS_03 should still be applicable even on a system that has only one MMIO-based RAS node. The architectural rule is that each error record group implements a single FHI for all records contained within the group. That does not imply a compliant system must expose at least two MMIO-based nodes for the test to compare. Ｍy understanding is that one node could represent one error record group that contains multiple error records.