Re: arm64: kernel v4.6-rc1 hangs on QEMU

2016-03-29 Thread Kefeng Wang
On 2016/3/30 6:52, Yury Norov wrote: > On Wed, Mar 30, 2016 at 12:32:42AM +0200, Arnd Bergmann wrote: >> 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 add

Re: arm64: kernel v4.6-rc1 hangs on QEMU

2016-03-29 Thread Yury Norov
On Wed, Mar 30, 2016 at 12:32:42AM +0200, Arnd Bergmann wrote: > 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 archite

Re: arm64: kernel v4.6-rc1 hangs on QEMU

2016-03-29 Thread Arnd Bergmann
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 > > T

Re: arm64: kernel v4.6-rc1 hangs on QEMU

2016-03-29 Thread Yury Norov
On Wed, Mar 30, 2016 at 12:12:30AM +0200, Arnd Bergmann wrote: > On Wednesday 30 March 2016 01:05:02 Yury Norov wrote: > > Checked for both v4.6-rc1 and current master (1993b17). > > Config: arm64 defconfig > > QEMU: QEMU emulator version 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.2) > > > > Stacktrace: >

Re: arm64: kernel v4.6-rc1 hangs on QEMU

2016-03-29 Thread Arnd Bergmann
On Wednesday 30 March 2016 01:05:02 Yury Norov wrote: > Checked for both v4.6-rc1 and current master (1993b17). > Config: arm64 defconfig > QEMU: QEMU emulator version 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.2) > > Stacktrace: > #0 arch_counter_get_cntvct () at > ./arch/arm64/include/asm/arch_timer.h:

arm64: kernel v4.6-rc1 hangs on QEMU

2016-03-29 Thread Yury Norov
Hi, Checked for both v4.6-rc1 and current master (1993b17). Config: arm64 defconfig QEMU: QEMU emulator version 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.2) Stacktrace: #0 arch_counter_get_cntvct () at ./arch/arm64/include/asm/arch_timer.h:121 #1 __delay (cycles=1024) at arch/arm64/lib/delay.c:31 #2