Re: [Qemu-devel] [PULL 0/9] ppc-for-2.12 queue 20180315

[David Gibson <david@gibson.dropbear.id.au>]

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On Sat, Mar 17, 2018 at 10:08:26AM +0000, Peter Maydell wrote:
> On 17 March 2018 at 04:02, David Gibson <david@gibson.dropbear.id.au> wrote:
> > On Fri, Mar 16, 2018 at 05:25:04PM +0000, Peter Maydell wrote:
> >> Hi -- this looks like it provokes new runtime error warnings from the
> >> clang sanitizer:
> >
> > Hrm.  What options do you need to trip these warnings?  Just using
> > --cc=clang doesn't give them to me, and using --enable-sanitizers
> > gives my piles of unrelated warnings.
> 
> https://wiki.qemu.org/Testing#clang_UBSan documents the necessary
> cflags.

Thanks.

> >> TEST: tests/boot-serial-test... (pid=926)
> >>   /ppc/boot-serial/ppce500:                                            OK
> >>   /ppc/boot-serial/prep:                                               OK
> >>   /ppc/boot-serial/40p:                                                OK
> >>   /ppc/boot-serial/g3beige:                                            OK
> >>   /ppc/boot-serial/mac99:                                              OK
> >>   /ppc/boot-serial/sam460ex:
> >> /home/petmay01/linaro/qemu-for-merges/target/ppc/translate.c:2979:15:
> >> runtime error: load of value 142, which is not a valid value for type
> >> 'bool'
> >> OK
> >>
> >> TEST: tests/boot-serial-test... (pid=1016)
> >>   /ppc64/boot-serial/ppce500:                                          OK
> >>   /ppc64/boot-serial/prep:                                             OK
> >>   /ppc64/boot-serial/40p:                                              OK
> >>   /ppc64/boot-serial/mac99:                                            OK
> >>   /ppc64/boot-serial/pseries:                                          OK
> >>   /ppc64/boot-serial/powernv:                                          OK
> >>   /ppc64/boot-serial/sam460ex:
> >> /home/petmay01/linaro/qemu-for-merges/target/ppc/translate.c:2979:15:
> >> runtime error: load of value 85, which is not a valid value for type
> >> 'bool'
> >> OK
> >>
> >> Looks like you're not initializing ctx->lazy_tlb_flush for all configs:
> >>     if (env->mmu_model == POWERPC_MMU_32B ||
> >>         env->mmu_model == POWERPC_MMU_601 ||
> >>         (env->mmu_model & POWERPC_MMU_64B))
> >>             ctx->lazy_tlb_flush = true;
> >>
> >> should perhaps be
> >>     ctx->lazy_tlb_flush =
> >>         env->mmu_model == POWERPC_MMU_32B ||
> >>         env->mmu_model == POWERPC_MMU_601 ||
> >>         (env->mmu_model & POWERPC_MMU_64B);
> >>
> >> ?
> >
> > Uh.. maybe.. except I don't see anything in the series that would be
> > likely to change that behaviour.
> 
> I imagine it's "tests/boot-serial: Test the sam460ex board" --
> this code was previously not being exercised in 'make check',
> and now it is.

Yeah, looks like.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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