From: David Matlack <dmatlack@google.com>
To: Sean Christopherson <seanjc@google.com>
Cc: kernel test robot <oliver.sang@intel.com>,
oe-lkp@lists.linux.dev, lkp@intel.com,
Josh Hilke <jrhilke@google.com>,
kvm@vger.kernel.org
Subject: Re: [kvm-x86:selftests2] [KVM] a262fc49e0: kselftests.kvm.make.fail
Date: Fri, 7 Aug 2026 22:21:55 +0000 [thread overview]
Message-ID: <anZag-tsavs8YNUl@google.com> (raw)
In-Reply-To: <anYlguXMOPZD-cfj@google.com>
On 2026-08-07 11:35 AM, Sean Christopherson wrote:
> On Fri, Aug 07, 2026, kernel test robot wrote:
> >
> >
> > Hello,
> >
> > kernel test robot noticed "kselftests.kvm.make.fail" on:
> >
> > commit: a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757 ("KVM: selftests: Build and link selftests/vfio/lib into KVM selftests")
> > https://github.com/kvm-x86/linux selftests2
> >
> > [test failed on linux-next/master 78bc8af4affb9a732504eb22eeac7d1e50883853]
> >
> > in testcase: kselftests
> > version: kselftests-x86_64-848acc8ffe1b-1_20260804
> > with following parameters:
> >
> > group: kvm
> >
> >
> > config: x86_64-rhel-9.4-kselftests
> > compiler: gcc-14
> > test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory
> >
> > (please refer to attached dmesg/kmsg for entire log/backtrace)
> >
> >
> > 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 <oliver.sang@intel.com>
> > | Closes: https://lore.kernel.org/oe-lkp/202608071656.86e9fd06-lkp@intel.com
> >
> >
> > /usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/vfio/lib/drivers/ioat/ioat.c:12:10: fatal error: hw.h: No such file or directory
> > 12 | #include "hw.h"
> > | ^~~~~~
> > compilation terminated.
> > make[1]: *** [../vfio/lib/libvfio.mk:32:
> > /usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/kvm/libvfio/drivers/ioat/ioat.o]
> > Error 1 make[1]: *** Waiting for unfinished jobs....
> > /usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/vfio/lib/drivers/dsa/dsa.c:14:10:
> > fatal error: registers.h: No such file or directory
> > 14 | #include "registers.h"
> > | ^~~~~~~~~~~~~
> > compilation terminated.
> > make[1]: *** [../vfio/lib/libvfio.mk:32:
> > /usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/kvm/libvfio/drivers/dsa/dsa.o]
> > Error 1 make[1]: Leaving directory
> > '/usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/kvm'
> > make: *** [Makefile:218: all] Error 2
>
> Any chance the file is literally just not there? Makefile.kvm's -I$(<D) expands
> to:
>
> -I/usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/vfio/lib/drivers/dsa
>
> which matches the directory of the input file:
>
> -c/usr/src/perf_selftests-x86_64-rhel-9.4-kselftests-a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757/tools/testing/selftests/vfio/lib/drivers/dsa/dsa.c
>
> so AFAICT the makefile is working as intended?
I think this is a problem in how the kernel test robot builds selftests.
hw.h and registers.h are symlinks to headers in the kernel source tree.
The selftests build works fine for me when I check out the entire kernel
tree at commit a262fc49e0aafdeeb1b4fd8cb0d79a0fde447757 and build the
KVM selftests.
But if I delete one of the symlink destinations, I see the same error.
$ ls -l tools/testing/selftests/vfio/lib/drivers/dsa/registers.h
[...] tools/testing/selftests/vfio/lib/drivers/dsa/registers.h -> ../../../../../../../drivers/dma/idxd/registers.h
$ rm drivers/dma/idxd/registers.h
$ make -C tools/testing/selftests/kvm -s
/usr/local/google/home/dmatlack/kernel/trees/kvm/tools/testing/selftests/vfio/lib/drivers/dsa/dsa.c:14:10: fatal error: registers.h: No such file or directory
14 | #include "registers.h"
| ^~~~~~~~~~~~~
compilation terminated.
make: *** [../vfio/lib/libvfio.mk:32: /usr/local/google/home/dmatlack/kernel/trees/kvm/tools/testing/selftests/kvm/libvfio/drivers/dsa/dsa.o] Error 1
Maybe the kernel test robot doesn't download the entire kernel tree when
building selftests?
prev parent reply other threads:[~2026-08-07 22:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-07 9:14 [kvm-x86:selftests2] [KVM] a262fc49e0: kselftests.kvm.make.fail kernel test robot
2026-08-07 18:35 ` Sean Christopherson
2026-08-07 22:21 ` David Matlack [this message]
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