Re: Current mainline kernel FTBFS in KVM SEV

From: Uros Bizjak <ubizjak@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Subject: Re: Current mainline kernel FTBFS in KVM SEV
Date: Thu, 9 Apr 2020 10:46:12 +0200	[thread overview]
Message-ID: <CAFULd4Y8Z0t2QUoMnscbJf-JqRyy=KYRZXyswH3PRwsZer4yyg@mail.gmail.com> (raw)
In-Reply-To: <a2187cc0-cab6-78db-3e2d-6edaf647c882@redhat.com>

On Thu, Apr 9, 2020 at 10:33 AM Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 09/04/20 10:20, Uros Bizjak wrote:
> > Current mainline kernel fails to build (on Fedora 31) with:
> >
> >   GEN     .version
> >   CHK     include/generated/compile.h
> >   LD      vmlinux.o
> >   MODPOST vmlinux.o
> >   MODINFO modules.builtin.modinfo
> >   GEN     modules.builtin
> >   LD      .tmp_vmlinux.btf
> > ld: arch/x86/kvm/svm/sev.o: in function `sev_flush_asids':
> > /hdd/uros/git/linux/arch/x86/kvm/svm/sev.c:48: undefined reference to
> > `sev_guest_df_flush'
> > ld: arch/x86/kvm/svm/sev.o: in function `sev_hardware_setup':
> > /hdd/uros/git/linux/arch/x86/kvm/svm/sev.c:1146: undefined reference
> > to `sev_platform_status'
> >   BTF     .btf.vmlinux.bin.o
>
> Strange, the functions are defined and exported with
> CONFIG_CRYPTO_DEV_SP_PSP, which is "y" in your config.

I tried to continue with a single make job (if there is something
wrong with dependencies). Still fails to build, but I can post the
continuation of errors from this single job:

[uros@localhost linux]$ make
  CALL    scripts/checksyscalls.sh
  CALL    scripts/atomic/check-atomics.sh
  DESCEND  objtool
  CHK     include/generated/compile.h
  CHK     kernel/kheaders_data.tar.xz
  GEN     .version
  CHK     include/generated/compile.h
  UPD     include/generated/compile.h
  CC      init/version.o
  AR      init/built-in.a
  LD      vmlinux.o
  MODPOST vmlinux.o
  MODINFO modules.builtin.modinfo
  GEN     modules.builtin
  LD      .tmp_vmlinux.btf
ld: arch/x86/kvm/svm/sev.o: in function `sev_flush_asids':
/hdd/uros/git/linux/arch/x86/kvm/svm/sev.c:48: undefined reference to
`sev_guest_df_flush'
ld: arch/x86/kvm/svm/sev.o: in function `sev_hardware_setup':
/hdd/uros/git/linux/arch/x86/kvm/svm/sev.c:1146: undefined reference
to `sev_platform_status'
  BTF     .btf.vmlinux.bin.o
tag__check_id_drift: subroutine_type id drift, core_id: 1644,
btf_type_id: 1642, type_id_off: 0
libbpf: Unsupported BTF_KIND:0
btf_elf__encode: btf__new failed!
free(): double free detected in tcache 2
scripts/link-vmlinux.sh: vrstica 114: 725221 Aborted
(izpis jedra) LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
  LD      .tmp_vmlinux.kallsyms1
.btf.vmlinux.bin.o: file not recognized: file format not recognized
make: *** [Makefile:1086: vmlinux] Error 1

Uros.