CVS commit: src/sys/arch/aarch64/aarch64

["Ryo Shimizu" <ryo%netbsd.org@localhost>]

Module Name:    src
Committed By:   ryo
Date:           Wed Apr 14 05:43:09 UTC 2021

Modified Files:
        src/sys/arch/aarch64/aarch64: bus_space.c trap.c

Log Message:
Fix the problem "pcictl pci0 list" causes "panic: trap_el1h_error" on rockpro64.

The panic occures in bus_space_barrier() in rk3399_pcie.c:rkpcie_conf_read().
We expected bus_space_peek_4() to trap and recover in the path
trap_el1h_sync() -> data_abort_handler(), but In fact, the read is delayed
until bus_space_barrier(), and we get an SError interrupt (trap_el1h_error)
instead of a Synchronous Exception (trap_el1h_sync).

To catch this correctly, An implicit barrier in bus_space_peek have been added,
and trap the SError interrupt to recover from.


To generate a diff of this commit:
cvs rdiff -u -r1.15 -r1.16 src/sys/arch/aarch64/aarch64/bus_space.c
cvs rdiff -u -r1.45 -r1.46 src/sys/arch/aarch64/aarch64/trap.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.