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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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