Re: [Qemu-discuss] s390x user-mode working example

[Alex Kashchenko]

On 11/24/2017 12:52 PM, Thomas Huth wrote:
> On 24.11.2017 12:19, Alex Kashchenko wrote:
> > Unfortunately, I just found that OpenJDK's JIT requires newer
> > instruction set than z900:
> >
> > $ ./s390x-linux-user/qemu-s390x
> > ~/jdk9/build/linux-s390x-normal-server-release/images/jdk/bin/java -version
> > #
> > # A fatal error has been detected by the Java Runtime Environment:
> > #
> > #  Internal Error (vm_version_s390.hpp:367), pid=26037, tid=26039
> > #  guarantee((_features[0] & GnrlInstrExtFacilityMask) ==
> > GnrlInstrExtFacilityMask) failed: We no more support older than z10.
>
> That looks like it is missing the so-called "general instruction
> extension facility". You might be lucky - that's one of the extensions
> that can already be enabled for testing purposes with the "qemu" CPU:
> Try to start QEMU with the "-cpu qemu,ginste=true" parameter.
> If it then still complains about missing facilities, try "-cpu help" to
> list all recognized feature flags.

"-cpu qemu,ginste=true" helps to pass the check from previous email.


> The following features can already be enabled with the "qemu" CPU (list
> has been copy-n-pasted from the sources, but I hope you'll be able to
> map it to the output of "-cpu help", too):
>
>         S390_FEAT_DAT_ENH,
>         S390_FEAT_IDTE_SEGMENT,
>         S390_FEAT_STFLE,
>         S390_FEAT_EXTENDED_IMMEDIATE,
>         S390_FEAT_EXTENDED_TRANSLATION_2,
>         S390_FEAT_EXTENDED_TRANSLATION_3,
>         S390_FEAT_LONG_DISPLACEMENT,
>         S390_FEAT_LONG_DISPLACEMENT_FAST,
>         S390_FEAT_ETF2_ENH,
>         S390_FEAT_STORE_CLOCK_FAST,
>         S390_FEAT_MOVE_WITH_OPTIONAL_SPEC,
>         S390_FEAT_ETF3_ENH,
>         S390_FEAT_COMPARE_AND_SWAP_AND_STORE,
>         S390_FEAT_COMPARE_AND_SWAP_AND_STORE_2,
>         S390_FEAT_GENERAL_INSTRUCTIONS_EXT,
>         S390_FEAT_EXECUTE_EXT,
>         S390_FEAT_FLOATING_POINT_SUPPPORT_ENH,
>         S390_FEAT_STFLE_45,
>         S390_FEAT_STFLE_49,
>         S390_FEAT_LOCAL_TLB_CLEARING,
>         S390_FEAT_STFLE_53,

Applying all the options from this list:

-cpu 
qemu,ginste=true,dateh=true,idtes=true,stfle=true,eimm=true,etf2=true,etf3=true,ldisp=true,ldisphp=true,etf3eh=true,etf3eh=true,csst=true,csst2=true,ginste=true,exrl=true,fpseh=true,stfle45=true,stfle49=true,ltlbc=true,stfle53=true

still causes the SIGILL during the JVM init though.

Thanks for the list! At least I know now that the problem is not caused 
by some local misconfiguration.

--
-Alex