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SubjectRe: Current kernel fails to compile with KVM on PowerPC
Hello Alexander,

Jörg Sommer hat am Mon 07. Nov, 20:48 (+0100) geschrieben:
> CHK include/linux/version.h
> HOSTCC scripts/mod/modpost.o
> CHK include/generated/utsrelease.h
> UPD include/generated/utsrelease.h
> HOSTLD scripts/mod/modpost
> GEN include/generated/bounds.h
> CC arch/powerpc/kernel/asm-offsets.s
> In file included from arch/powerpc/kernel/asm-offsets.c:59:0:
> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h: In function ‘compute_tlbie_rb’:
> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:393:10: error: ‘HPTE_V_SECONDARY’ undeclared (first use in this function)
> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:393:10: note: each undeclared identifier is reported only once for each function it appears in
> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:396:12: error: ‘HPTE_V_1TB_SEG’ undeclared (first use in this function)
> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:401:10: error: ‘HPTE_V_LARGE’ undeclared (first use in this function)
> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:415:2: warning: right shift count >= width of type [enabled by default]
> make[3]: *** [arch/powerpc/kernel/asm-offsets.s] Fehler 1
> make[2]: *** [prepare0] Fehler 2
> make[1]: *** [deb-pkg] Fehler 2
> make: *** [deb-pkg] Fehler 2

I'm so sorry to have to report a new bug in one of your patches. It was
covered by the one above. I've picked the commit for it from your git
repository and now, the kernel build fails with this error:

BOOTCC arch/powerpc/boot/fdt_strerror.o
BOOTAR arch/powerpc/boot/wrapper.a
WRAP arch/powerpc/boot/zImage.pmac
WRAP arch/powerpc/boot/zImage.coff
ERROR: "kvmppc_h_pr" [arch/powerpc/kvm/kvm.ko] undefined!
make[3]: *** [__modpost] Fehler 1
make[2]: *** [modules] Fehler 2
make[2]: *** Warte auf noch nicht beendete Prozesse...
WRAP arch/powerpc/boot/zImage.miboot
make[1]: *** [deb-pkg] Fehler 2
make: *** [deb-pkg] Fehler 2

The bug was introduced by this commit

HEAD is now at aacf9aa KVM: PPC: Stub emulate CFAR and PURR SPRs
a668f2bd3f14ce7f92e119f4b5d9b50cdc59e855 is the first bad commit
commit a668f2bd3f14ce7f92e119f4b5d9b50cdc59e855
Author: Alexander Graf <agraf@suse.de>
Date: Mon Aug 8 17:26:24 2011 +0200

KVM: PPC: Support SC1 hypercalls for PAPR in PR mode

PAPR defines hypercalls as SC1 instructions. Using these, the guest modifies
page tables and does other privileged operations that it wouldn't be allowed
to do in supervisor mode.

This patch adds support for PR KVM to trap these instructions and route them
through the same PAPR hypercall interface that we already use for HV style
KVM.

Signed-off-by: Alexander Graf <agraf@suse.de>

Bye, Jörg.
--
“Perl—the only language that looks the same
before and after RSA encryption.” (Keith Bostic)
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