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

Alexander Graf hat am Tue 22. Nov, 22:29 (+0100) geschrieben:
> On 22.11.2011, at 21:04, Jörg Sommer wrote:
> > Jörg Sommer hat am Mon 07. Nov, 20:48 (+0100) geschrieben:
> >> I'm trying to build the kernel with the git commit-id
> >> 31555213f03bca37d2c02e10946296052f4ecfcd, but it fails
> >>
> >> 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 still having this problem. I can' build
> > 6fe4c6d466e95d31164f14b1ac4aefb51f0f4f82. Are there any patches to
> > make the kernel builds and do not oops [1] on PowerPC?
>
> The failures above should be fixed by now.
>
> > [1] »kernel BUG at include/linux/kvm_host.h:603!«
> > http://www.mail-archive.com/kvm@vger.kernel.org/msg61433.html
>
> This is unfortunately still there. It's because of preemption being
> enabled. Please just use CONFIG_PREEMPT_NONE for the time being

This doesn't help. I've build with CONFIG_PREEMPT_NONE, but I'm getting
this Oops, when I start qemu.

% uname -a
Linux ibook 3.3.0-rc3-00279-g8e4baad #74 Sun Feb 19 03:57:54 CET 2012 ppc GNU/Linux

% cat /proc/cpuinfo
processor : 0
cpu : 7455, altivec supported
clock : 606.000000MHz
revision : 3.3 (pvr 8001 0303)
bogomips : 36.86
timebase : 18432000
platform : PowerMac
model : PowerBook6,3
machine : PowerBook6,3
motherboard : PowerBook6,3 MacRISC3 Power Macintosh
detected as : 287 (iBook G4)
pmac flags : 0000001b
L2 cache : 256K unified
pmac-generation : NewWorld
Memory : 640 MB
% grep PREEM /boot/config-$(uname -r)
# CONFIG_PREEMPT_RCU is not set
CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
CONFIG_PREEMPT_COUNT=y

% qemu-system-ppc --version
QEMU emulator version 1.0 (Debian 1.0+dfsg-3), Copyright (c) 2003-2008 Fabrice Bellard

% qemu-system-ppc -M mac99 -cpu 7400 -prom-env 'auto-boot?=false' -k de -enable-kvm

[ 4205.444343] ------------[ cut here ]------------
[ 4205.444373] kernel BUG at include/linux/kvm_host.h:634!
[ 4205.444407] Oops: Exception in kernel mode, sig: 5 [#1]
[ 4205.444418] PowerMac
[ 4205.444426] Modules linked in: kvm ppp_async crc_ccitt ppp_generic slhc ipv6 fuse snd_powermac option usb_wwan
[ 4205.444562] NIP: ea823c34 LR: ea823bcc CTR: 00000000
[ 4205.444579] REGS: e3617a10 TRAP: 0700 Not tainted (3.3.0-rc3-00279-g8e4baad)
[ 4205.444590] MSR: 00029032 <EE,ME,IR,DR,RI> CR: 28002462 XER: 00000000
[ 4205.444624] TASK = e3405bc0[4169] 'qemu-system-ppc' THREAD: e3616000
[ 4205.444634] GPR00: 00000001 e3617ac0 e3405bc0 e3617be0 e34060fc 00000000 e3617ddc 00000000
[ 4205.444664] GPR08: 00000000 00000000 00000000 00000000 00000000 1036c490 103051b8 10304e48
[ 4205.444693] GPR16: 48048000 10e2a5c0 10e2ada8 1014662c 00000007 48021018 00400000 0000d032
[ 4205.444723] GPR24: 00000000 00000900 ffffffff e362f000 00000001 e3405bc0 ea83b000 e3617ac0
[ 4205.444817] NIP [ea823c34] kvmppc_vcpu_run+0x138/0x210 [kvm]
[ 4205.444843] LR [ea823bcc] kvmppc_vcpu_run+0xd0/0x210 [kvm]
[ 4205.444853] Call Trace:
[ 4205.444876] [e3617ac0] [e3616000] 0xe3616000 (unreliable)
[ 4205.444909] [e3617e20] [ea81e12c] kvm_arch_vcpu_ioctl_run+0x350/0x37c [kvm]
[ 4205.444940] [e3617e50] [ea817c98] kvm_vcpu_ioctl+0x158/0x888 [kvm]
[ 4205.444967] [e3617ea0] [c0129020] do_vfs_ioctl+0x714/0x78c
[ 4205.444984] [e3617f10] [c0129100] sys_ioctl+0x68/0x8c
[ 4205.445004] [e3617f40] [c0013b70] ret_from_syscall+0x0/0x38
[ 4205.445022] --- Exception: c01 at 0xf4efa98
[ 4205.445028] LR = 0xf4ef9fc
[ 4205.445036] Instruction dump:
[ 4205.445049] 41a20014 7fc3f378 38800800 38a02000 4bffe929 54290024 38000000 8129000c
[ 4205.445080] 2f890000 409e000c 7c0000a6 54008ffe <0f000000> 8002000c 7f63db78 7fc4f378
[ 4205.445119] ---[ end trace 03417e90b5c8db01 ]---
[ 4205.445129]
[ 4205.445141] BUG: sleeping function called from invalid context at kernel/rwsem.c:21
[ 4205.445156] in_atomic(): 0, irqs_disabled(): 1, pid: 4169, name: qemu-system-ppc
[ 4205.445168] Call Trace:
[ 4205.445182] [e36177c0] [c000bc44] show_stack+0xbc/0x194 (unreliable)
[ 4205.445214] [e3617810] [c047bbd4] dump_stack+0x30/0x38
[ 4205.445237] [e3617820] [c0062010] __might_sleep+0xf8/0x100
[ 4205.445253] [e3617830] [c0473324] down_read+0x38/0x60
[ 4205.445278] [e3617840] [c004621c] exit_signals+0x30/0x16c
[ 4205.445300] [e3617870] [c0034ec8] do_exit+0x100/0x74c
[ 4205.445319] [e36178c0] [c000ee6c] die+0x270/0x278
[ 4205.445336] [e36178f0] [c000ef34] _exception+0x64/0x104
[ 4205.445354] [e36179e0] [c0474f70] program_check_exception+0x1dc/0x1e4
[ 4205.445371] [e3617a00] [c00141d0] ret_from_except_full+0x0/0x4c
[ 4205.445421] --- Exception: 700 at kvmppc_vcpu_run+0x138/0x210 [kvm]
[ 4205.445428] LR = kvmppc_vcpu_run+0xd0/0x210 [kvm]
[ 4205.445446] [e3617ac0] [e3616000] 0xe3616000 (unreliable)
[ 4205.445477] [e3617e20] [ea81e12c] kvm_arch_vcpu_ioctl_run+0x350/0x37c [kvm]
[ 4205.445508] [e3617e50] [ea817c98] kvm_vcpu_ioctl+0x158/0x888 [kvm]
[ 4205.445526] [e3617ea0] [c0129020] do_vfs_ioctl+0x714/0x78c
[ 4205.445543] [e3617f10] [c0129100] sys_ioctl+0x68/0x8c
[ 4205.445558] [e3617f40] [c0013b70] ret_from_syscall+0x0/0x38
[ 4205.445577] --- Exception: c01 at 0xf4efa98
[ 4205.445583] LR = 0xf4ef9fc
Bye, Jörg.
--
Man soll Denken lehren, nicht Gedachtes.
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