Hi, I was running a bunch of tests in preparation for the MMIO/exec series but am running into regressions on master. I'm at commit 64175afc695c0672876fbbfc31b299c86d562cb4
On the xlnx-zcu102 I see lockups, the console goes unresponsive. On one of my vexpress-a15 setups (with an a57), I see weird segfaults in user-space. I bisected this multiple times with each of the test cases and all of the bisects bring me to this commit: commit e75449a346bf558296966a44277bfd93412c6da6 Author: Emilio G. Cota <c...@braap.org> Date: Fri Apr 28 14:59:23 2017 -0400 target/aarch64: optimize indirect branches Does this ring any bells? Are there any known issues at the moment? I've copied a GDB backtrace form the ZynqMP lockup at the end of this email. Thanks, Edgar GDB backtrace: (gdb) thread apply all bt Thread 6 (Thread 0x7fff431fc700 (LWP 28586)): #0 0x00007ffff5e2826d in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x00007ffff5e21dbd in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0 #2 0x0000555555b5cc40 in qemu_mutex_lock ( mutex=mutex@entry=0x55555620be80 <qemu_global_mutex>) at /home/edgar/src/c/qemu/qemu/util/qemu-thread-posix.c:61 #3 0x00005555557bc9cc in qemu_mutex_lock_iothread () at /home/edgar/src/c/qemu/qemu/cpus.c:1581 #4 0x000055555578e865 in cpu_handle_interrupt (last_tb=<synthetic pointer>, cpu=0x5555566c40b0) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:491 #5 cpu_exec (cpu=cpu@entry=0x7fffc543f4f8) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:670 #6 0x00005555557bcb9f in tcg_cpu_exec (cpu=0x7fffc543f4f8) at /home/edgar/src/c/qemu/qemu/cpus.c:1270 #7 qemu_tcg_cpu_thread_fn (arg=0x7fffc543f4f8) at /home/edgar/src/c/qemu/qemu/cpus.c:1473 #8 0x00007ffff5e1f6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #9 0x00007ffff5b5582d in clone () from /lib/x86_64-linux-gnu/libc.so.6 Thread 5 (Thread 0x7fff439fd700 (LWP 28585)): #0 0x00007ffff5e2826d in __lll_lock_wait () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x00007ffff5e21dbd in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0 #2 0x0000555555b5cc40 in qemu_mutex_lock ( mutex=mutex@entry=0x55555620be80 <qemu_global_mutex>) at /home/edgar/src/c/qemu/qemu/util/qemu-thread-posix.c:61 #3 0x00005555557bc9cc in qemu_mutex_lock_iothread () at /home/edgar/src/c/qemu/qemu/cpus.c:1581 #4 0x000055555578e865 in cpu_handle_interrupt (last_tb=<synthetic pointer>, cpu=0x5555566c40b0) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:491 #5 cpu_exec (cpu=cpu@entry=0x7fffc54208d0) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:670 #6 0x00005555557bcb9f in tcg_cpu_exec (cpu=0x7fffc54208d0) at /home/edgar/src/c/qemu/qemu/cpus.c:1270 #7 qemu_tcg_cpu_thread_fn (arg=0x7fffc54208d0) at /home/edgar/src/c/qemu/qemu/cpus.c:1473 #8 0x00007ffff5e1f6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #9 0x00007ffff5b5582d in clone () from /lib/x86_64-linux-gnu/libc.so.6 Thread 4 (Thread 0x7fff441fe700 (LWP 28584)): #0 0x00007ffff5e21dac in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0 #1 0x0000555555b5cc40 in qemu_mutex_lock ( mutex=mutex@entry=0x55555620be80 <qemu_global_mutex>) at /home/edgar/src/c/qemu/qemu/util/qemu-thread-posix.c:61 #2 0x00005555557bc9cc in qemu_mutex_lock_iothread () at /home/edgar/src/c/qemu/qemu/cpus.c:1581 #3 0x000055555578e865 in cpu_handle_interrupt (last_tb=<synthetic pointer>, cpu=0x5555566c40b0) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:491 #4 cpu_exec (cpu=cpu@entry=0x7fffc5401ca8) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:670 #5 0x00005555557bcb9f in tcg_cpu_exec (cpu=0x7fffc5401ca8) at /home/edgar/src/c/qemu/qemu/cpus.c:1270 #6 qemu_tcg_cpu_thread_fn (arg=0x7fffc5401ca8) at /home/edgar/src/c/qemu/qemu/cpus.c:1473 #7 0x00007ffff5e1f6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #8 0x00007ffff5b5582d in clone () from /lib/x86_64-linux-gnu/libc.so.6 Thread 3 (Thread 0x7fff449ff700 (LWP 28583)): #0 0x00005555558c4c89 in regime_el (mmu_idx=ARMMMUIdx_S1NSE1, env=0x7fffc53eb310) at /home/edgar/src/c/qemu/qemu/target/arm/helper.c:7028 #1 regime_tcr (mmu_idx=<optimized out>, env=0x7fffc53eb310) at /home/edgar/src/c/qemu/qemu/target/arm/helper.c:7117 #2 arm_regime_tbi0 (env=env@entry=0x7fffc53eb310, mmu_idx=<optimized out>, mmu_idx@entry=ARMMMUIdx_S12NSE1) at /home/edgar/src/c/qemu/qemu/target/arm/helper.c:7142 #3 0x00005555557ba346 in cpu_get_tb_cpu_state (flags=<synthetic pointer>, cs_base=<synthetic pointer>, pc=<synthetic pointer>, env=0x7fffc53eb310) at /home/edgar/src/c/qemu/qemu/target/arm/cpu.h:2571 #4 helper_lookup_tb_ptr (env=0x7fffc53eb310, addr=18446743524088820436) at /home/edgar/src/c/qemu/qemu/tcg-runtime.c:156 #5 0x00007fffcf2f7e53 in code_gen_buffer () #6 0x000055555578de7c in cpu_tb_exec (itb=<optimized out>, itb=<optimized out>, cpu=0x7fffc5727478) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:166 #7 cpu_loop_exec_tb (tb_exit=<synthetic pointer>, last_tb=<synthetic pointer>, tb=<optimized out>, cpu=0x7fffc5727478) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:574 #8 cpu_exec (cpu=cpu@entry=0x7fffc53e3080) at /home/edgar/src/c/qemu/qemu/cpu-exec.c:672 #9 0x00005555557bcb9f in tcg_cpu_exec (cpu=0x7fffc53e3080) at /home/edgar/src/c/qemu/qemu/cpus.c:1270 #10 qemu_tcg_cpu_thread_fn (arg=0x7fffc53e3080) at /home/edgar/src/c/qemu/qemu/cpus.c:1473 #11 0x00007ffff5e1f6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #12 0x00007ffff5b5582d in clone () from /lib/x86_64-linux-gnu/libc.so.6 Thread 2 (Thread 0x7fffef7b7700 (LWP 28582)): #0 0x00007ffff5b4f8e9 in syscall () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x0000555555b5d385 in qemu_futex_wait (val=<optimized out>, f=<optimized out>) at /home/edgar/src/c/qemu/qemu/include/qemu/futex.h:26 #2 qemu_event_wait (ev=ev@entry=0x55555661bae4 <rcu_call_ready_event>) at /home/edgar/src/c/qemu/qemu/util/qemu-thread-posix.c:415 #3 0x0000555555b6cc6e in call_rcu_thread (opaque=<optimized out>) at /home/edgar/src/c/qemu/qemu/util/rcu.c:249 #4 0x00007ffff5e1f6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #5 0x00007ffff5b5582d in clone () from /lib/x86_64-linux-gnu/libc.so.6 Thread 1 (Thread 0x7ffff7f31c00 (LWP 28578)): #0 0x00007ffff5b49c21 in ppoll () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x0000555555b58f39 in ppoll (__ss=0x0, __timeout=0x7fffffffd5f0, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77 #2 qemu_poll_ns (fds=<optimized out>, nfds=<optimized out>, timeout=timeout@entry=9223371867734611302) at /home/edgar/src/c/qemu/qemu/util/qemu-timer.c:334 #3 0x0000555555b59d6a in os_host_main_loop_wait (timeout=9223371867734611302) at /home/edgar/src/c/qemu/qemu/util/main-loop.c:255 #4 main_loop_wait (nonblocking=<optimized out>) at /home/edgar/src/c/qemu/qemu/util/main-loop.c:517 #5 0x0000555555779057 in main_loop () at /home/edgar/src/c/qemu/qemu/vl.c:1918 #6 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at /home/edgar/src/c/qemu/qemu/vl.c:4752 (gdb)