aarch64: Crash with qemu master when starting Jailhouse

[Jan Kiszka]

Hi,

I've seen this first a couple of weeks ago, ignored it, but it's still there 
today with master:

Thread 13 "qemu-system-aar" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f90e2ffd700 (LWP 26883)]
0x0000560ef0bddda7 in get_phys_addr_lpae (env=<optimized out>, 
address=address@entry=1095261192, access_type=access_type@entry=MMU_DATA_LOAD, 
mmu_idx=mmu_idx@entry=ARMMMUIdx_Stage2, s1_is_el0=s1_is_el0@entry=false, 
    phys_ptr=phys_ptr@entry=0x7f90e2ffc200, txattrs=0x7f90e2ffc1ec, 
prot=0x7f90e2ffc1f0, page_size_ptr=0x7f90e2ffc1f8, fi=0x7f90e2ffc530, 
cacheattrs=0x0) at /data/qemu/target/arm/helper.c:11106
11106           cacheattrs->attrs = convert_stage2_attrs(env, extract32(attrs, 
0, 4));
(gdb) bt
#0  0x0000560ef0bddda7 in get_phys_addr_lpae
    (env=<optimized out>, address=address@entry=1095261192, 
access_type=access_type@entry=MMU_DATA_LOAD, 
mmu_idx=mmu_idx@entry=ARMMMUIdx_Stage2, s1_is_el0=s1_is_el0@entry=false, 
phys_ptr=phys_ptr@entry=0x7f90e2ffc200, txattrs=0x7f90e2ffc1ec, 
prot=0x7f90e2ffc1f0, page_size_ptr=0x7f90e2ffc1f8, fi=0x7f90e2ffc530, 
cacheattrs=0x0) at /data/qemu/target/arm/helper.c:11106
#1  0x0000560ef0bde3c6 in S1_ptw_translate (env=env@entry=0x560ef32742b0, 
mmu_idx=mmu_idx@entry=ARMMMUIdx_Stage1_E1, addr=1095261192, txattrs=..., 
fi=fi@entry=0x7f90e2ffc530) at /data/qemu/target/arm/helper.c:10218
#2  0x0000560ef0bdd7f0 in arm_ldq_ptw (fi=0x7f90e2ffc530, 
mmu_idx=ARMMMUIdx_Stage1_E1, is_secure=false, addr=<optimized out>, 
cs=0x560ef326ac10) at /data/qemu/target/arm/helper.c:10284
#3  0x0000560ef0bdd7f0 in get_phys_addr_lpae
    (env=env@entry=0x560ef32742b0, address=address@entry=18446674270391351284, 
access_type=access_type@entry=MMU_INST_FETCH, 
mmu_idx=mmu_idx@entry=ARMMMUIdx_Stage1_E1, s1_is_el0=s1_is_el0@entry=false, 
phys_ptr=phys_ptr@entry=0x7f90e2ffc490, txattrs=0x7f90e2ffc518, 
prot=0x7f90e2ffc514, page_size_ptr=0x7f90e2ffc528, fi=0x7f90e2ffc530, 
cacheattrs=0x7f90e2ffc51c) at /data/qemu/target/arm/helper.c:11014
#4  0x0000560ef0bdfacb in get_phys_addr (env=env@entry=0x560ef32742b0, 
address=<optimized out>, address@entry=18446674270391351284, 
access_type=access_type@entry=MMU_INST_FETCH, mmu_idx=<optimized out>, 
    mmu_idx@entry=ARMMMUIdx_Stage1_E1, phys_ptr=phys_ptr@entry=0x7f90e2ffc490, 
attrs=attrs@entry=0x7f90e2ffc518, prot=0x7f90e2ffc514, 
page_size=0x7f90e2ffc528, fi=0x7f90e2ffc530, cacheattrs=0x7f90e2ffc51c)
    at /data/qemu/target/arm/helper.c:12115
#5  0x0000560ef0bdf5ca in get_phys_addr
    (env=env@entry=0x560ef32742b0, address=address@entry=18446674270391351284, 
access_type=access_type@entry=MMU_INST_FETCH, mmu_idx=<optimized out>, 
phys_ptr=phys_ptr@entry=0x7f90e2ffc520, attrs=attrs@entry=0x7f90e2ffc518, 
prot=0x7f90e2ffc514, page_size=0x7f90e2ffc528, fi=0x7f90e2ffc530, 
cacheattrs=0x7f90e2ffc51c) at /data/qemu/target/arm/helper.c:11950
#6  0x0000560ef0bef669 in arm_cpu_tlb_fill (cs=0x560ef326ac10, 
address=18446674270391351284, size=<optimized out>, access_type=MMU_INST_FETCH, 
mmu_idx=2, probe=<optimized out>, retaddr=0) at 
/data/qemu/target/arm/tlb_helper.c:177
#7  0x0000560ef0adbd85 in tlb_fill (cpu=0x560ef326ac10, 
addr=18446674270391351284, size=0, access_type=MMU_INST_FETCH, mmu_idx=2, 
retaddr=0) at /data/qemu/accel/tcg/cputlb.c:1032
#8  0x0000560ef0adf216 in get_page_addr_code_hostp (env=<optimized out>, 
addr=addr@entry=18446674270391351284, hostp=hostp@entry=0x0) at 
/data/qemu/accel/tcg/cputlb.c:1211
#9  0x0000560ef0adf287 in get_page_addr_code (env=<optimized out>, 
addr=addr@entry=18446674270391351284) at /data/qemu/accel/tcg/cputlb.c:1243
#10 0x0000560ef0af21c4 in tb_htable_lookup (cpu=cpu@entry=0x560ef326ac10, 
pc=18446674270391351284, cs_base=<optimized out>, flags=2182107137, 
cf_mask=4278714368) at /data/qemu/accel/tcg/cpu-exec.c:337
#11 0x0000560ef0af2fd6 in tb_lookup__cpu_state (cf_mask=<optimized out>, 
flags=0x7f90e2ffc718, cs_base=0x7f90e2ffc720, pc=0x7f90e2ffc728, cpu=0x0) at 
/data/qemu/include/exec/tb-lookup.h:43
#12 0x0000560ef0af2fd6 in tb_find (cf_mask=524288, tb_exit=0, last_tb=0x0, 
cpu=0x0) at /data/qemu/accel/tcg/cpu-exec.c:404
#13 0x0000560ef0af2fd6 in cpu_exec (cpu=cpu@entry=0x560ef326ac10) at 
/data/qemu/accel/tcg/cpu-exec.c:748
#14 0x0000560ef0bb779f in tcg_cpu_exec (cpu=0x560ef326ac10) at 
/data/qemu/softmmu/cpus.c:1356
#15 0x0000560ef0bb980b in qemu_tcg_cpu_thread_fn (arg=arg@entry=0x560ef326ac10) 
at /data/qemu/softmmu/cpus.c:1664
#16 0x0000560ef10aaf76 in qemu_thread_start (args=<optimized out>) at 
/data/qemu/util/qemu-thread-posix.c:521
#17 0x00007f919e9434f9 in start_thread () at /lib64/libpthread.so.0
#18 0x00007f919e67bf2f in clone () at /lib64/libc.so.6

I've reproduced that with a local Jailhouse installation, but I suspect 
(do not have the time right now to check) that a vanilla jailhouse-
images [1] build for qemu-arm64 will trigger it as well. Once time 
permits, I could try to generate and share such an image.

qemu 3.1.1.1 of my distro is fine, also f4d8cf148e43.

Any ideas?

Jan

[1] https://github.com/siemens/jailhouse-images

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