linux-kernel - Re: arch/powerpc/kvm/e500mc.c:95:15: error: invalid instruction

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Message-ID: <ZLsXAdjFuKLpd3ig@google.com>
Date:   Fri, 21 Jul 2023 16:38:41 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     kernel test robot <lkp@...el.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>
Subject: Re: arch/powerpc/kvm/e500mc.c:95:15: error: invalid instruction

On Fri, Jul 21, 2023, kernel test robot wrote:
> Hi Sean,
> 
> FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   f7e3a1bafdea735050dfde00523cf505dc7fd309
> commit: e83ca8cfa286c9fc78b585b0e66df7f542bcbcf2 KVM: PPC: booke: Mark three local functions "static"
> date:   4 months ago
> config: powerpc-randconfig-r001-20230721 (https://download.01.org/0day-ci/archive/20230721/202307211945.TSPcyOhh-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> reproduce: (https://download.01.org/0day-ci/archive/20230721/202307211945.TSPcyOhh-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202307211945.TSPcyOhh-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
> >> arch/powerpc/kvm/e500mc.c:95:15: error: invalid instruction
>       95 |         asm volatile("tlbilxlpid");

I assume this is a binutils bug?  I ran into a similar problem on PPC a while
back where I couldn't cross-compile even relatively basic PPC code.