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Groups > linux.kernel > #1366755
| From | Arnd Bergmann <arnd@arndb.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: arm64: kernel v4.6-rc1 hangs on QEMU |
| Date | 2016-03-30 00:40 +0200 |
| Message-ID | <riasN-4m1-3@gated-at.bofh.it> (permalink) |
| References | <ri9ZM-46r-15@gated-at.bofh.it> <ria9s-4ad-5@gated-at.bofh.it> <riaj7-4fC-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wednesday 30 March 2016 01:22:17 Yury Norov wrote: > > > > Undefined instruction in cpuinfo_store_boot_cpu() could be related > > to the SYS_ID_AA64MMFR2_EL1 access that was recently added. > > > > What does the architecture say about reading unknown cpuid registers? > > > > Arnd > > ThunderX has some unimplemented system registers. AFAIR, attempt to access it > causes data abort. Ok, if that is the case, maybe the read_cpuid() macro can be changed so it contains a fixup for the trap? That should handle both data abort and undefinstr. Arnd
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arm64: kernel v4.6-rc1 hangs on QEMU Yury Norov <ynorov@caviumnetworks.com> - 2016-03-30 00:10 +0200
Re: arm64: kernel v4.6-rc1 hangs on QEMU Arnd Bergmann <arnd@arndb.de> - 2016-03-30 00:20 +0200
Re: arm64: kernel v4.6-rc1 hangs on QEMU Yury Norov <ynorov@caviumnetworks.com> - 2016-03-30 00:30 +0200
Re: arm64: kernel v4.6-rc1 hangs on QEMU Arnd Bergmann <arnd@arndb.de> - 2016-03-30 00:40 +0200
Re: arm64: kernel v4.6-rc1 hangs on QEMU Yury Norov <ynorov@caviumnetworks.com> - 2016-03-30 01:00 +0200
Re: arm64: kernel v4.6-rc1 hangs on QEMU Kefeng Wang <wangkefeng.wang@huawei.com> - 2016-03-30 08:50 +0200
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