[Xen-devel] Xen GCC coverage ARM64 testing - Unexpected Trap: Data Abort

[Viktor Mitin <viktor.mitin.19@xxxxxxxxx>]

Hi All,

Please be aware that we have tried Xen ARM64 build with
CONFIG_COVERAGE feature enabled. The build environment is next:
Xen Versions tested: xen-4.12-stable, xen-4.13-staging
Board: H3ULCB, R-Car H3 Ver.2.0
Poky: Yocto Project Reference Distro 2.4.2
Compiler: aarch64-poky-linux-gcc (Linaro GCC 7.2-2017.11) 7.2.1

Both Xen versions (4.12 and staging) return "Unexpected Trap: Data
Abort" issue in case of 'xencov reset' or 'xencov read' calls:

root@h3ulcb:~# xencov reset
(XEN) Data Abort Trap. Syndrome=0x7
(XEN) Walking Hypervisor VA 0x361700 on CPU3 via TTBR 0x0000000078266000
(XEN) 0TH[0x0] = 0x0000000078265f7f
(XEN) 1ST[0x0] = 0x0000000078262f7f
(XEN) 2ND[0x1] = 0x004000007825ff7f
(XEN) 3RD[0x161] = 0x00600000781e1f7e
(XEN) CPU3: Unexpected Trap: Data Abort

Attaching the next log files (zipped in
xen_with_config_coverage_logs.zip) with the details:
- all the run-time exception details (rcarh3_config_coverage_trap.log);
- xen package build log file with compilation options (compilation.log);
- xen hypervisor .config file used for the build (xen_dot_config.log);

Please share any comments or ideas about the issue.

Thanks,
Viktor Mitin

Attachment: xen_with_config_coverage_logs.zip
Description: Zip archive

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