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| author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2016-09-16 19:50:23 +0400 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2016-09-19 15:34:35 -0300 |
| commit | fa5376dd8adb5ad104e5773f09c15af2e8a76738 (patch) | |
| tree | 4d79223f6e5c85ee0bdc112663068937d3fb73c6 | |
| parent | 1560fcfa96594f62cb2062f88e6785dda663529c (diff) | |
| download | qemu-fa5376dd8adb5ad104e5773f09c15af2e8a76738.zip | |
linux-user-i386: Fix crash on cpuid
Running cpuid instructions with a simple run like:
i386-linux-user/qemu-i386 tests/tcg/sha1-i386
Results in the following assert:
#0 0x00007ffff64246f5 in raise () from /lib64/libc.so.6
#1 0x00007ffff64262fa in abort () from /lib64/libc.so.6
#2 0x00007ffff7937ec5 in g_assertion_message () from /lib64/libglib-2.0.so.0
#3 0x00007ffff7937f5a in g_assertion_message_expr () from /lib64/libglib-2.0.so.0
#4 0x000055555561b54c in apicid_bitwidth_for_count (count=0) at /home/elmarco/src/qemu/include/hw/i386/topology.h:58
#5 0x000055555561b58a in apicid_smt_width (nr_cores=0, nr_threads=0) at /home/elmarco/src/qemu/include/hw/i386/topology.h:67
#6 0x000055555561b5c3 in apicid_core_offset (nr_cores=0, nr_threads=0) at /home/elmarco/src/qemu/include/hw/i386/topology.h:82
#7 0x000055555561b5e3 in apicid_pkg_offset (nr_cores=0, nr_threads=0) at /home/elmarco/src/qemu/include/hw/i386/topology.h:89
#8 0x000055555561dd86 in cpu_x86_cpuid (env=0x555557999550, index=4, count=3, eax=0x7fffffffcae8, ebx=0x7fffffffcaec, ecx=0x7fffffffcaf0, edx=0x7fffffffcaf4) at /home/elmarco/src/qemu/target-i386/cpu.c:2405
#9 0x0000555555638e8e in helper_cpuid (env=0x555557999550) at /home/elmarco/src/qemu/target-i386/misc_helper.c:106
#10 0x000055555599dc5e in static_code_gen_buffer ()
#11 0x00005555555952f8 in cpu_tb_exec (cpu=0x5555579912d0, itb=0x7ffff4371ab0) at /home/elmarco/src/qemu/cpu-exec.c:166
#12 0x0000555555595c8e in cpu_loop_exec_tb (cpu=0x5555579912d0, tb=0x7ffff4371ab0, last_tb=0x7fffffffd088, tb_exit=0x7fffffffd084, sc=0x7fffffffd0a0) at /home/elmarco/src/qemu/cpu-exec.c:517
#13 0x0000555555595e50 in cpu_exec (cpu=0x5555579912d0) at /home/elmarco/src/qemu/cpu-exec.c:612
#14 0x00005555555c065b in cpu_loop (env=0x555557999550) at /home/elmarco/src/qemu/linux-user/main.c:297
#15 0x00005555555c25b2 in main (argc=2, argv=0x7fffffffd848, envp=0x7fffffffd860) at /home/elmarco/src/qemu/linux-user/main.c:4803
The fields are set in qemu_init_vcpu() with softmmu, but it's a stub
with linux-user.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
| -rw-r--r-- | qom/cpu.c | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -342,6 +342,11 @@ static void cpu_common_initfn(Object *obj) cpu->cpu_index = UNASSIGNED_CPU_INDEX; cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs; + /* *-user doesn't have configurable SMP topology */ + /* the default value is changed by qemu_init_vcpu() for softmmu */ + cpu->nr_cores = 1; + cpu->nr_threads = 1; + qemu_mutex_init(&cpu->work_mutex); QTAILQ_INIT(&cpu->breakpoints); QTAILQ_INIT(&cpu->watchpoints); |