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Date: Sat, 24 Dec 2011 11:59:51 +0100
From: Jörg Sommer <joerg@...a.gnuu.de>
To: Alexander Graf <agraf@...e.de>
Cc: Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
kvm list <kvm@...r.kernel.org>, kvm-ppc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: Current kernel fails to compile with KVM on PowerPC
Alexander Graf hat am Fri 23. Dec, 14:50 (+0100) geschrieben:
> On 20.12.2011, at 21:27, Jörg Sommer wrote:
> > 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
>
> This is odd. kvmppc_h_pr shouldn't be accessed when not in book3s_64_pr mode:
>
> #ifdef CONFIG_KVM_BOOK3S_64_PR
> if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
> r = RESUME_GUEST;
> break;
> }
> #endif
I had simply reverted the commit a668f2bd3f14ce7f92e119f4b5d9b50cdc59e855
and now, I get these lines:
[ 539.183154] BUG: sleeping function called from invalid context at /home/joerg/kein_Backup/git/linux/arch/powerpc/include/asm/uaccess.h:438
[ 539.183193] in_atomic(): 1, irqs_disabled(): 0, pid: 1889, name: qemu-system-ppc
[ 539.183205] Call Trace:
[ 539.183231] [e33f5e00] [c000bcf4] show_stack+0xbc/0x194 (unreliable)
[ 539.183253] [e33f5e50] [c04601cc] dump_stack+0x30/0x38
[ 539.183277] [e33f5e60] [c0033edc] __might_sleep+0xf8/0x100
[ 539.183302] [e33f5e70] [c0053f70] copy_siginfo_to_user+0x64/0x5ac
[ 539.183320] [e33f5e90] [c00547ac] sys_rt_sigtimedwait+0x124/0x168
[ 539.183337] [e33f5f40] [c0013c70] ret_from_syscall+0x0/0x38
[ 539.183378] --- Exception: c01 at 0xf5bbd34
[ 539.183383] LR = 0x1000eea4
[ 539.183886] BUG: scheduling while atomic: qemu-system-ppc/1889/0x10000003
[ 539.183901] Modules linked in: kvm ipv6 fuse option usb_wwan usbserial snd_powermac b43 mac80211 snd_aoa_i2sbus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_seq cfg80211 firewire_ohci usb_storage sr_mod evdev firewire_core rng_core snd_timer snd_seq_device snd pmac_zilog cdrom crc_itu_t serial_core soundcore ssb snd_aoa_soundbus
[ 539.184000] Call Trace:
[ 539.184018] [e33f5630] [c000bcf4] show_stack+0xbc/0x194 (unreliable)
[ 539.184038] [e33f5680] [c04601cc] dump_stack+0x30/0x38
[ 539.184054] [e33f5690] [c0460628] __schedule_bug+0x68/0x70
[ 539.184074] [e33f56a0] [c0456af0] __schedule+0x94/0x55c
[ 539.184094] [e33f57a0] [c00361b0] __cond_resched+0x34/0x48
[ 539.184110] [e33f57b0] [c0457074] _cond_resched+0x48/0x54
[ 539.184138] [e33f57c0] [c00e8ce0] __get_user_pages+0x3c8/0x488
[ 539.184155] [e33f5830] [c00e8e64] get_user_pages+0x60/0x68
[ 539.184181] [e33f5840] [c001b028] get_user_pages_fast+0x144/0x190
[ 539.184238] [e33f5890] [ea4458f8] hva_to_pfn.isra.40+0x124/0x344 [kvm]
[ 539.184269] [e33f58d0] [ea445bd4] __gfn_to_pfn+0xbc/0xc4 [kvm]
[ 539.184298] [e33f58f0] [ea445c54] gfn_to_pfn+0x38/0x40 [kvm]
[ 539.184334] [e33f5900] [ea44de78] kvmppc_gfn_to_pfn+0xb8/0xc8 [kvm]
[ 539.184363] [e33f5920] [ea4520fc] kvmppc_mmu_map_page+0x3c/0x274 [kvm]
[ 539.184393] [e33f5970] [ea44ed28] kvmppc_handle_pagefault+0x264/0x3d0 [kvm]
[ 539.184423] [e33f59c0] [ea44f254] kvmppc_handle_exit+0x250/0x734 [kvm]
[ 539.184452] [e33f5a00] [ea450e5c] kvmppc_handler_highmem+0x5c/0x6c [kvm]
[ 539.184481] [e33f5ac0] [ea44fc94] kvmppc_vcpu_run+0x164/0x224 [kvm]
[ 539.184511] [e33f5e20] [ea44a1bc] kvm_arch_vcpu_ioctl_run+0x350/0x37c [kvm]
[ 539.184542] [e33f5e50] [ea4441b4] kvm_vcpu_ioctl+0x158/0xa08 [kvm]
[ 539.184565] [e33f5ea0] [c011e508] do_vfs_ioctl+0x730/0x7a8
[ 539.184581] [e33f5f10] [c011e5e8] sys_ioctl+0x68/0x8c
[ 539.184597] [e33f5f40] [c0013c70] ret_from_syscall+0x0/0x38
[ 539.184620] --- Exception: c01 at 0xf668048
[ 539.184625] LR = 0xf667fac
[ 539.190159] Page fault in user mode with in_atomic() = 1 mm = e3398c40
[ 539.192448] NIP = 10029af0 MSR = d032
[ 539.194530] BUG: scheduling while atomic: qemu-system-ppc/1889/0x10000003
[ 539.196654] Modules linked in: kvm ipv6 fuse option usb_wwan usbserial snd_powermac b43 mac80211 snd_aoa_i2sbus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_seq cfg80211 firewire_ohci usb_storage sr_mod evdev firewire_core rng_core snd_timer snd_seq_device snd pmac_zilog cdrom crc_itu_t serial_core soundcore ssb snd_aoa_soundbus
[ 539.203960] Call Trace:
[ 539.205886] [e33f5c00] [c000bcf4] show_stack+0xbc/0x194 (unreliable)
[ 539.207936] [e33f5c50] [c04601cc] dump_stack+0x30/0x38
[ 539.209939] [e33f5c60] [c0460628] __schedule_bug+0x68/0x70
[ 539.211968] [e33f5c70] [c0456af0] __schedule+0x94/0x55c
[ 539.214000] [e33f5d70] [c00361b0] __cond_resched+0x34/0x48
[ 539.216042] [e33f5d80] [c0457074] _cond_resched+0x48/0x54
[ 539.218100] [e33f5d90] [c0458404] mutex_lock+0x3c/0x64
[ 539.220162] [e33f5da0] [c000edcc] die+0xb4/0x244
[ 539.222161] [e33f5dd0] [c045a1f4] do_page_fault+0x168/0x5e0
[ 539.224146] [e33f5f40] [c00140a0] handle_page_fault+0xc/0x80
[ 539.226148] --- Exception: 301 at 0x10029af0
[ 539.226154] LR = 0x10029ae8
[ 539.252137] Oops: Weird page fault, sig: 11 [#1]
[ 539.254123] PowerMac
[ 539.255945] Modules linked in: kvm ipv6 fuse option usb_wwan usbserial snd_powermac b43 mac80211 snd_aoa_i2sbus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_seq cfg80211 firewire_ohci usb_storage sr_mod evdev firewire_core rng_core snd_timer snd_seq_device snd pmac_zilog cdrom crc_itu_t serial_core soundcore ssb snd_aoa_soundbus
[ 539.262919] NIP: 10029af0 LR: 10029ae8 CTR: c00fe560
[ 539.264843] REGS: e33f5f50 TRAP: 0301 Not tainted (3.2.0-rc6-00065-g6f39f29)
[ 539.266785] MSR: 0000d032 <EE,PR,ME,IR,DR> CR: 24000464 XER: 00000000
[ 539.268894] DAR: 48023008, DSISR: 40000000
[ 539.270737] TASK = e68cd4a0[1889] 'qemu-system-ppc' THREAD: e33f4000
[ 539.270974] GPR00: 10029ae8 bf92ce60 4804ce30 10c7df00 48023000 24000464 00000002 0f668048
[ 539.273129] GPR08: 0000d032 00000000 00001032 e33f5f40 e33f4000
[ 539.276827] NIP [10029af0] 0x10029af0
[ 539.278668] LR [10029ae8] 0x10029ae8
[ 539.280446] Call Trace:
[ 539.282173] ---[ end trace e4d95fa8275f9d6a ]---
[ 539.283945] note: qemu-system-ppc[1889] exited with preempt_count 1
[ 539.285754] BUG: scheduling while atomic: qemu-system-ppc/1889/0x10000002
[ 539.287576] Modules linked in: kvm ipv6 fuse option usb_wwan usbserial snd_powermac b43 mac80211 snd_aoa_i2sbus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_seq cfg80211 firewire_ohci usb_storage sr_mod evdev firewire_core rng_core snd_timer snd_seq_device snd pmac_zilog cdrom crc_itu_t serial_core soundcore ssb snd_aoa_soundbus
[ 539.293830] Call Trace:
[ 539.295444] [e33f5b90] [c000bcf4] show_stack+0xbc/0x194 (unreliable)
[ 539.297171] [e33f5be0] [c04601cc] dump_stack+0x30/0x38
[ 539.298816] [e33f5bf0] [c0460628] __schedule_bug+0x68/0x70
[ 539.300450] [e33f5c00] [c0456af0] __schedule+0x94/0x55c
[ 539.302053] [e33f5d00] [c00361b0] __cond_resched+0x34/0x48
[ 539.303652] [e33f5d10] [c0457074] _cond_resched+0x48/0x54
[ 539.305252] [e33f5d20] [c0458854] down_read+0x3c/0x64
[ 539.306838] [e33f5d30] [c0081188] acct_collect+0x48/0x17c
[ 539.308422] [e33f5d50] [c00429b0] do_exit+0x1ac/0x710
[ 539.309994] [e33f5da0] [c000ef50] die+0x238/0x244
[ 539.311540] [e33f5dd0] [c045a1f4] do_page_fault+0x168/0x5e0
[ 539.313103] [e33f5f40] [c00140a0] handle_page_fault+0xc/0x80
[ 539.314670] --- Exception: 301 at 0x10029af0
[ 539.314676] LR = 0x10029ae8
[ 539.321849] BUG: scheduling while atomic: qemu-system-ppc/1889/0x10000002
[ 539.323505] Modules linked in: kvm ipv6 fuse option usb_wwan usbserial snd_powermac b43 mac80211 snd_aoa_i2sbus snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_seq cfg80211 firewire_ohci usb_storage sr_mod evdev firewire_core rng_core snd_timer snd_seq_device snd pmac_zilog cdrom crc_itu_t serial_core soundcore ssb snd_aoa_soundbus
[ 539.329287] Call Trace:
[ 539.330837] [e33f5ac0] [c000bcf4] show_stack+0xbc/0x194 (unreliable)
[ 539.332455] [e33f5b10] [c04601cc] dump_stack+0x30/0x38
[ 539.334012] [e33f5b20] [c0460628] __schedule_bug+0x68/0x70
[ 539.335580] [e33f5b30] [c0456af0] __schedule+0x94/0x55c
[ 539.337143] [e33f5c30] [c00361b0] __cond_resched+0x34/0x48
[ 539.338700] [e33f5c40] [c0457074] _cond_resched+0x48/0x54
[ 539.340234] [e33f5c50] [c0458404] mutex_lock+0x3c/0x64
[ 539.341740] [e33f5c60] [c00eb004] unlink_file_vma+0x40/0x60
[ 539.343265] [e33f5c80] [c00e5e20] free_pgtables+0x68/0xc0
[ 539.344725] [e33f5cb0] [c00ec274] exit_mmap+0x108/0x144
[ 539.346192] [e33f5d10] [c003c2bc] mmput+0x68/0x120
[ 539.347623] [e33f5d20] [c00427fc] exit_mm+0x144/0x14c
[ 539.349067] [e33f5d50] [c00429d4] do_exit+0x1d0/0x710
[ 539.350507] [e33f5da0] [c000ef50] die+0x238/0x244
[ 539.351934] [e33f5dd0] [c045a1f4] do_page_fault+0x168/0x5e0
[ 539.353365] [e33f5f40] [c00140a0] handle_page_fault+0xc/0x80
[ 539.354795] --- Exception: 301 at 0x10029af0
[ 539.354801] LR = 0x10029ae8
--
IRC: Der [Prof. Andreas Pfitzmann, TU Dresden] hat gerade vorgeschlagen, sie
sollen doch statt Trojanern die elektromagnetische Abstrahlung nutzen. Das
sei nicht massenfähig, ginge ohne Eingriff ins System, sei zielgerichtet,
und, der Hammer, das funktioniere ja bei Wahlcomputern schon sehr gut.
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