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7c2fe62f13
Currently, when SPMC at S-EL2 is used, we cannot use the RAS framework to handle Group 0 interrupts. This is required on platforms where first level of triaging needs to occur at EL3, before forwarding RAS handling to a secure partition running atop an SPMC (hafnium). The RAS framework depends on EHF and EHF registers for Group 0 interrupts to be trapped to EL3 when execution is both in secure world and normal world. However, an FF-A compliant SPMC requires secure interrupts to be trapped by the SPMC when execution is in S-EL0/S-EL1. Consequently, the SPMC (hafnium) is incompatible with EHF, since it is not re-entrant, and a Group 0 interrupt trapped to EL3 when execution is in secure world, cannot be forwarded to an SP running atop SPMC. This patch changes EHF to only register for Group 0 interrupts to be trapped to EL3 when execution is in normal world and also makes it a valid routing model to do so, when EL3_EXCEPTION_HANDLING is set (when enabling the RAS framework). Signed-off-by: Raghu Krishnamurthy <raghu.ncstate@gmail.com> Change-Id: I72d4cf4d8ecc549a832d1c36055fbe95866747fe |
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