[b]When we porting kdump, we started the second kernel and encountered smmu fault.
We think this problem is due to the fact that the SMMU is not reset when the second kernel is started. How can we guarantee that the reset is good, is there any abnormality?
Log is as follows:[/b]
No fault found! But SMMU fault irq occured
[ 3.883229] SMMU0: Unexpected {global,context} fault, this could be serious
[ 3.890394] GFSR 0x00000000, GFSYNR0 0x0000000c, GFSYNR1 0x00006a86, GFSYNR2 0x00000000, fault_addr=0x1a3e0f8e265c1, sid=134(0x86 - Invalid SID)
[ 3.907641] gfsr = 0x00000000 fault_handled = 0
[ 3.912095] SMMU1: Unexpected {global,context} fault, this could be serious
[ 3.919008] GFSR 0x00000000, GFSYNR0 0x00000000, GFSYNR1 0x00000086, GFSYNR2 0x00000000, fault_addr=0xe23280420024, sid=134(0x86 - Invalid SID)
[ 3.936081] gfsr = 0x00000000 fault_handled = 0
[ 3.940795] SMMU2: Unexpected {global,context} fault, this could be serious
[ 3.947707] GFSR 0x00000000, GFSYNR0 0x00000000, GFSYNR1 0x000002ad, GFSYNR2 0x00000000, fault_addr=0x1b19a7904dbad, sid=173(0xad - Invalid SID)
[ 3.964864] t19x-arm-smmu: No fault found! But SMMU fault irq occured.[ 3.971085] gfsr = 0x00000000 fault_handled = 0
[ 3.975629] SMMU0: Unexpected {global,context} fault, this could be serious
[ 3.982538] GFSR 0x00000000, GFSYNR0 0x0000000c, GFSYNR1 0x00006a86, GFSYNR2 0x00000000, fault_addr=0x1a3e0f8e265c1, sid=134(0x86 - Invalid SID)
[ 4.000042] gfsr = 0x00000000 fault_handled = 0
[ 4.004494] SMMU1: Unexpected {global,context} fault, this could be serious
[ 4.011408] GFSR 0x00000000, GFSYNR0 0x00000000, GFSYNR1 0x00000086, GFSYNR2 0x00000000, fault_addr=0xe23280420024, sid=134(0x86 - Invalid SID)
[ 4.028739] gfsr = 0x00000000 fault_handled = 0
[ 4.033196] SMMU2: Unexpected {global,context} fault, this could be serious
[ 4.040107] GFSR 0x00000000, GFSYNR0 0x00000000, GFSYNR1 0x000002ad, GFSYNR2 0x00000000, fault_addr=0x1b19a7904dbad, sid=173(0xad - Invalid SID)
[ 4.057006] t19x-arm-smmu: No fault found! But SMMU fault irq occured.[ 4.063478] gfsr = 0x00000000 fault_handled = 0
[ 4.068030] SMMU0: Unexpected {global,context} fault, this could be serious
[ 4.075195] GFSR 0x00000000, GFSYNR0 0x0000000c, GFSYNR1 0x00006a86, GFSYNR2 0x00000000, fault_addr=0x1a3e0f8e265c1, sid=134(0x86 - Invalid SID)
[ 4.092181] gfsr = 0x00000000 fault_handled = 0
[ 4.096895] SMMU1: Unexpected {global,context} fault, this could be serious
[ 4.103808] GFSR 0x00000000, GFSYNR0 0x00000000, GFSYNR1 0x00000086, GFSYNR2 0x00000000, fault_addr=0xe23280420024, sid=134(0x86 - Invalid SID)
[ 4.121141] gfsr = 0x00000000 fault_handled = 0
[ 4.125597] SMMU2: Unexpected {global,context} fault, this could be serious
[ 4.132507] GFSR 0x00000000, GFSYNR0 0x00000000, GFSYNR1 0x000002ad, GFSYNR2 0x00000000, fault_addr=0x1b19a7904dbad, sid=173(0xad - Invalid SID)