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Re: [Qemu-devel] [PATCH v2] e600 core for MPC86xx processors

From: Alexey Kardashevskiy
Subject: Re: [Qemu-devel] [PATCH v2] e600 core for MPC86xx processors
Date: Mon, 24 Jun 2013 14:14:29 +1000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

On 06/21/2013 10:03 PM, Alexander Graf wrote:
> On 21.06.2013, at 14:01, Julio Guerra wrote:
>> 2013/6/21 Alexander Graf <address@hidden>:
>>> On 26.05.2013, at 19:41, Julio Guerra wrote:
>>>> MPC86xx processors are based on the e600 core, which is not the case
>>>> in qemu where it is based on the 7400 processor.
>>>> This patch creates the e600 core and instantiates the MPC86xx
>>>> processors based on it. Therefore, adding the high BATs and the SPRG
>>>> 4..7 registers, which are e600-specific [1].
>>>> This allows to define the MPC8610 processor too and my program running
>>>> on a real MPC8610 target is now able to run on qemu :)
>>>> [1] http://cache.freescale.com/files/32bit/doc/ref_manual/E600CORERM.pdf
>>>> Signed-off-by: Julio Guerra <address@hidden>
>>> Thanks, applied to ppc-next.
>> I just retested this patch and I noticed the `handle_mmu_fault`
>> default value introduced by recent A. Farber patches on the CPU
>> definitions is wrong with the selected memory model. Thus qemu
>> complains about the MMU model.
>> The following is missing in e600 CPU definition:
>>> #if defined(CONFIG_SOFTMMU)
>>>    ppc->handle_mmu_fault = ppc_hash32_handle_mmu_fault;
>>> #endif
>> Can you correct it or should I resend a patch (v3 or just the previous
>> three lines) ?
> Just send a patch on top of the current one.

I do not really understand what this patch actually does but it breaks my
pseries/power7 setup. Please, help.

Starting program: /home/aik/qemu-system-ppc64 -L qemu-ppc64-bios/ -trace
events=qemu_trace_events -net nic,model=e1000,addr=0:0:0 -net
user,hostfwd=tcp::5000-:22 -m 1024 -machine pseries -nographic -vga none
-enable-kvm -kernel guest.vmlinux.n -initrd 1.cpio
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
assertion failed: (type->parent_type != NULL)

Breakpoint 4, 0x00000080c6eefb8c in .abort () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install SDL-1.2.15-8.fc19.ppc64
bluez-libs-4.101-6.fc19.ppc64 boost-system-1.53.0-6.fc19.ppc64
boost-thread-1.53.0-6.fc19.ppc64 brlapi-0.6.0-5.fc19.ppc64
ceph-devel-0.56.4-1.fc19.ppc64 ceph-libs-0.56.4-1.fc19.ppc64
cryptopp-5.6.2-2.fc19.ppc64 cyrus-sasl-lib-2.1.26-8.fc19.ppc64p7
glib2-2.36.2-1.fc19.ppc64 glibc-2.17-4.fc19.ppc64p7
glusterfs-api-3.4.0-0.5.beta2.fc19.ppc64 gmp-5.1.1-2.fc19.ppc64
gnutls-3.1.11-1.fc19.ppc64 keyutils-libs-1.5.5-4.fc19.ppc64
krb5-libs-1.11.2-10.fc19.ppc64 leveldb-1.9.0-1.fc19.ppc64
libX11- libXau-1.0.6-7.fc19.ppc64
libcom_err-1.42.7-2.fc19.ppc64 libcurl-7.29.0-6.fc19.ppc64
libfdt-1.3.0-6.fc19.ppc64 libgcc-4.8.0-8.fc19.ppc64
libgcrypt-1.5.2-1.fc19.ppc64 libgpg-error-1.11-1.fc19.ppc64
libidn-1.26-2.fc19.ppc64 libjpeg-turbo-1.2.90-2.fc19.ppc64
libselinux-2.1.13-15.fc19.ppc64 libssh2-1.4.3-4.fc19.ppc64
libstdc++-4.8.0-8.fc19.ppc64 libtasn1-3.3-1.fc19.ppc64
libuuid-2.23.1-2.fc19.ppc64 libxcb-1.9-3.fc19.ppc64
ncurses-libs-5.9-11.20130511.fc19.ppc64 nettle-2.6-2.fc19.ppc64
nspr-4.9.6-1.fc19.ppc64 nss-3.14.3-13.0.fc19.ppc64
nss-softokn-freebl-3.14.3-1.fc19.ppc64 nss-util-3.14.3-1.fc19.ppc64
openldap-2.4.35-4.fc19.ppc64 openssl-libs-1.0.1e-4.fc19.ppc64p7
p11-kit-0.18.3-1.fc19.ppc64 pcre-8.32-6.fc19.ppc64p7
pixman-0.30.0-1.fc19.ppc64 snappy-1.1.0-1.fc19.ppc64 zlib-1.2.7-10.fc19.ppc64p7
(gdb) up
#1  0x00000080c742d54c in .g_assertion_message () from /lib64/libglib-2.0.so.0
#2  0x00000080c742d5f4 in .g_assertion_message_expr () from
(gdb) bt
#0  0x00000080c6eefb8c in .abort () from /lib64/libc.so.6
#1  0x00000080c742d54c in .g_assertion_message () from /lib64/libglib-2.0.so.0
#2  0x00000080c742d5f4 in .g_assertion_message_expr () from
#3  0x0000000010260058 in type_get_parent (type=0x10f7b260)
    at /home/alexey/pcipassthru/qemu-impreza/qom/object.c:152
#4  0x0000000010260120 in type_class_get_size (ti=0x10f7b260)
    at /home/alexey/pcipassthru/qemu-impreza/qom/object.c:170
#5  0x00000000102603d8 in type_initialize (ti=0x10f7b260)
    at /home/alexey/pcipassthru/qemu-impreza/qom/object.c:236
#6  0x000000001026175c in object_class_foreach_tramp (key=0x10f7b3e0,
    opaque=0x3fffffffe5e0) at
#7  0x00000080c73e0ab0 in .g_hash_table_foreach () from /lib64/libglib-2.0.so.0
#8  0x000000001026188c in object_class_foreach (fn=
    @0x10681290: 0x10261988 <object_class_get_list_tramp>,
    implements_type=0x105c7188 "powerpc64-cpu", include_abstract=0x0,
    at /home/alexey/pcipassthru/qemu-impreza/qom/object.c:647
#9  0x0000000010261a3c in object_class_get_list (implements_type=0x105c7188
    include_abstract=0x0) at
#10 0x0000000010459dec in ppc_cpu_class_by_pvr (pvr=0x3f0201)
    at /home/alexey/pcipassthru/qemu-impreza/target-ppc/translate_init.c:7908
#11 0x00000000103ca368 in kvm_ppc_register_host_cpu_type ()
    at /home/alexey/pcipassthru/qemu-impreza/target-ppc/kvm.c:1781
#12 0x00000000103c4fcc in kvm_arch_init (s=0x10fb8ab0)
    at /home/alexey/pcipassthru/qemu-impreza/target-ppc/kvm.c:110
#13 0x0000000010376138 in kvm_init () at
#14 0x00000000102c1b08 in configure_accelerator ()
    at /home/alexey/pcipassthru/qemu-impreza/vl.c:2673
#15 0x00000000102c5e28 in main (argc=0x15, argv=0x3ffffffff218,
    at /home/alexey/pcipassthru/qemu-impreza/vl.c:4062
(gdb) up
#3  0x0000000010260058 in type_get_parent (type=0x10f7b260)
    at /home/alexey/pcipassthru/qemu-impreza/qom/object.c:152
152             g_assert(type->parent_type != NULL);
(gdb) p *type
$5 = {name = 0x10f7b3e0 "MPC8641-powerpc64-cpu", class_size = 0x0,
instance_size = 0x0,
  class_init = @0x1069ac10: 0x103a287c
  class_base_init = 0x0, class_finalize = 0x0, class_data = 0x0,
instance_init = 0x0,
  instance_finalize = 0x0, abstract = 0x0, parent = 0x10f7b400
  parent_type = 0x0, class = 0x0, num_interfaces = 0x0, interfaces = {{
      typename = 0x0} <repeats 32 times>}}


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