Hello,

...

Does BL31 need to send 0xC4000061 event to BL32 again?

I don't think it will. It is really odd that 0xC4000061(SP_EVENT_COMPLETE_AARCH64) ever reaches the BL32/MM handler. This is from looking at the upstream code quickly but it definitely depends on the platform you are running, what version of TF-A you are using, build options used. Is it possible that the unhandled exception is occurring after successful handling of the DMC620 error but there is a following issue that occurs right after, causing the crash? From the register dump it looks like there was an Instruction abort exception at address 0 while running in EL3. Something seems to have gone seriously wrong to have 0xC4000061 ever go back to BL32 and to get an instruction abort at address 0.

...

Does current TF-A support to run RAS test? It seems BL31 will crash.

See above. The answer really depends on the factors mentioned above.

The following would be helpful to know: 1) What platform you are running on? Can this issue be reproduced outside your testing environment, perhaps on FVP or QEMU? 2) What version of TF-A and StandaloneMM is being used? Preferably the commit-id, so that we can be sure we are looking at the same code. 3) What version of the kernel and sdei driver is being used? 4) I can't tell from looking at the log but do you know if writing 0x123 to sde_ras_poison causes a DMC620 interrupt or an SError or external abort through memory access ?

Thanks Raghu

On 4/13/20 12:16 AM, 吴斌(郅隆) via TF-A wrote:

Dear Friends,

I am using TF-A to test RAS feature. When I triggered DMC620 RAS error in Linux(echo 0x123 > /sys/kernel/debug/sdei_ras_poison). ​BL32 will recieve UnRecognized Event - 0xC4000061(SP_EVENT_COMPLETE_AARCH64) and finally BL31 crashed.

In my understanding, this 0xC4000061 should consumed by BL31, not send it to BL32 again.

A piece of error log as below:

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CperWrite - CperAddress@0xFF610064 CperWrite - 1 Section@FFBE91A8, Length 80, SectionType@FFBE9138 CperWrite - Got Error Section: Platform Memory. MmEntryPoint Done Received delegated event X0 :  0xC4000061 X1 :  0x0 X2 :  0x0 X3 :  0x0 Received event - 0xC4000061 on cpu 0 UnRecognized Event - 0xC4000061 Failed delegated event 0xC4000061, Status 0x2 Unhandled Exception in EL3. x30            = 0x0000000000000000 x0             = 0x00000000ff007e00 x1             = 0xfffffffffffffffe x2             = 0x00000000600003c0 x3             = 0x0000000000000000 x4             = 0x0000000000000000 x5             = 0x0000000000000000 x6             = 0x00000000ff015080 x7             = 0x0000000000000000 x8             = 0x00000000c4000061 x9             = 0x0000000000000021 x10            = 0x0000000000000040 x11            = 0x00000000ff00f2b0 x12            = 0x00000000ff0118c0 x13            = 0x0000000000000002 x14            = 0x00000000ff016b70 x15            = 0x00000000ff003f20 x16            = 0x0000000000000044 x17            = 0x00000000ff010430 x18            = 0x0000000000000e3c x19            = 0x0000000000000000 More error log please refer to attachment.

My question is,

1. Does BL31 need to send 0xC4000061 event to BL32 again?
2. Does current TF-A support to run RAS test? It seems BL31 will crash.

Appreciate your help.

BRs， Bin Wu