From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60790) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V2129-0004X9-KU for qemu-devel@nongnu.org; Wed, 24 Jul 2013 11:31:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V2126-0000Ko-U5 for qemu-devel@nongnu.org; Wed, 24 Jul 2013 11:31:21 -0400 Received: from cantor2.suse.de ([195.135.220.15]:35225 helo=mx2.suse.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V2126-0000KS-H1 for qemu-devel@nongnu.org; Wed, 24 Jul 2013 11:31:18 -0400 Message-ID: <51EFF342.3090106@suse.de> Date: Wed, 24 Jul 2013 17:31:14 +0200 From: Alexander Graf MIME-Version: 1.0 References: <51AD8D88.70104@redhat.com> <20130604075107.GJ4725@redhat.com> <3B8B589E-4019-4AEE-A846-1A3F45A2EB4D@suse.de> <51EFEFB9.7020905@redhat.com> <20130724152125.GI16400@redhat.com> In-Reply-To: <20130724152125.GI16400@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] VM can not boot after commit 235e898 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gleb Natapov Cc: Anthony Liguori , Jordan Justen , qemu-devel Developers , Dunrong Huang , Hannes Reinecke , Paolo Bonzini , Jordan Justen On 07/24/2013 05:21 PM, Gleb Natapov wrote: > On Wed, Jul 24, 2013 at 05:16:09PM +0200, Paolo Bonzini wrote: >> Il 24/07/2013 11:58, Alexander Graf ha scritto: >>>>> No QEMU or kvm crashes, no error message printed, I mean it just hangs, even no BIOS information are printed. >>>>> And "top" shows QEMU consumes 100% cpu. >>>>> >>>>> When I define DEBUG_KVM in kvm-all.c, and run QEMU(this time I boot a normal OS disk), >>>>> # x86_64-softmmu/qemu-system-x86_64 -enable-kvm -hda /mnt/nfs/Images/debian-append.img >>>>> kvm_init_vcpu >>>>> kvm_cpu_exec() >>>>> handle_io >>>>> handle_io >>>>> handle_io >>>>> handle_io >>>>> >>>>> Only 4 debug messages(handle_io) are printed, then nothing is shown, and "top" shows QEMU process uses 100% CPU. >>> After this we're running in an endless loop of: >>> >>> qemu-system-x86-9298 [003] ...1 162090.918845: kvm_emulate_insn: f0000:c489:66 ea 91 c4 0f 00 08 00 (prot16) >>> qemu-system-x86-9298 [003] d..2 162090.918846: kvm_entry: vcpu 0 >>> >>> (qemu) x /i $pc >>> 0x00000000000fc489: ljmpl $0x8,$0xfc491 >>> >>> With current master, qemu-system-x86_64 -enable-kvm is broken on at least 3.7 kernels (openSUSE 12.3). >>> >>> Gleb, I don't remember all the glorious details of ljmpl, but would it have to raise an MMIO request for a read-only memory slot which it fails to do? >> The point of KVM_CAP_READONLY_MEM should be that it doesn't. >> > Yes, it should not. Can you provide complete trace of kvm and kvmmmu > event up until failure? Sure! These are all trace events up to the loop that I was able to fetch from the "kvm" and "kvmmmu" event bucket in /sys/kernel/debug/tracing. qemu-system-x86-13149 [001] ...1 185370.437938: kvm_set_irq: gsi 8 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.437942: kvm_pic_set_irq: chip 1 pin 0 (edge) qemu-system-x86-13149 [001] ...2 185370.437943: kvm_ioapic_set_irq: pin 8 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.437945: kvm_set_irq: gsi 4 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.437946: kvm_pic_set_irq: chip 0 pin 4 (edge) qemu-system-x86-13149 [001] ...2 185370.437946: kvm_ioapic_set_irq: pin 4 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.437947: kvm_set_irq: gsi 1 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.437947: kvm_pic_set_irq: chip 0 pin 1 (edge) qemu-system-x86-13149 [001] ...2 185370.437948: kvm_ioapic_set_irq: pin 1 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.437948: kvm_set_irq: gsi 12 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.437948: kvm_pic_set_irq: chip 1 pin 4 (edge) qemu-system-x86-13149 [001] ...2 185370.437949: kvm_ioapic_set_irq: pin 12 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.437949: kvm_set_irq: gsi 1 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.437949: kvm_pic_set_irq: chip 0 pin 1 (edge) qemu-system-x86-13149 [001] ...2 185370.437949: kvm_ioapic_set_irq: pin 1 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.437950: kvm_set_irq: gsi 12 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.437950: kvm_pic_set_irq: chip 1 pin 4 (edge) qemu-system-x86-13149 [001] ...2 185370.437950: kvm_ioapic_set_irq: pin 12 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.438050: kvm_set_irq: gsi 0 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.438051: kvm_pic_set_irq: chip 0 pin 0 (edge) qemu-system-x86-13149 [001] ...2 185370.438051: kvm_ioapic_set_irq: pin 2 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.438052: kvm_set_irq: gsi 0 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.438052: kvm_pic_set_irq: chip 0 pin 0 (edge) qemu-system-x86-13149 [001] ...2 185370.438052: kvm_ioapic_set_irq: pin 2 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13149 [001] ...1 185370.438052: kvm_set_irq: gsi 0 level 0 source 0 qemu-system-x86-13149 [001] ...2 185370.438053: kvm_pic_set_irq: chip 0 pin 0 (edge) qemu-system-x86-13149 [001] ...2 185370.438053: kvm_ioapic_set_irq: pin 2 dst 0 vec=0 (Fixed|physical|edge|masked) qemu-system-x86-13150 [000] ...2 185370.441730: kvm_mmu_get_page: sp gfn 0 4 q0 direct wux !nxe root 0 sync new qemu-system-x86-13150 [000] ...2 185370.441734: kvm_fpu: load qemu-system-x86-13150 [000] d..2 185370.441734: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441738: kvm_exit: reason EPT_VIOLATION rip 0xfff0 info 81 0 qemu-system-x86-13150 [000] ...1 185370.441739: kvm_page_fault: address feffc000 error_code 81 qemu-system-x86-13150 [000] ...2 185370.441746: kvm_mmu_get_page: sp gfn 0 3 q0 direct wux !nxe root 0 sync new qemu-system-x86-13150 [000] ...2 185370.441748: kvm_mmu_get_page: sp gfn c0000 2 q0 direct wux !nxe root 0 sync new qemu-system-x86-13150 [000] ...2 185370.441749: kvm_mmu_get_page: sp gfn fee00 1 q0 direct wux !nxe root 0 sync new qemu-system-x86-13150 [000] d..2 185370.441752: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441757: kvm_exit: reason EPT_VIOLATION rip 0xfff0 info 184 0 qemu-system-x86-13150 [000] ...1 185370.441757: kvm_page_fault: address ffff0 error_code 184 qemu-system-x86-13150 [000] ...2 185370.441760: kvm_mmu_get_page: sp gfn 0 2 q0 direct wux !nxe root 0 sync new qemu-system-x86-13150 [000] ...2 185370.441761: kvm_mmu_get_page: sp gfn 0 1 q0 direct wux !nxe root 0 sync new qemu-system-x86-13150 [000] d..2 185370.441762: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441763: kvm_exit: reason EPT_VIOLATION rip 0xe05b info 184 0 qemu-system-x86-13150 [000] ...1 185370.441763: kvm_page_fault: address fe05b error_code 184 qemu-system-x86-13150 [000] d..2 185370.441764: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441765: kvm_exit: reason EPT_VIOLATION rip 0xe05b info 181 0 qemu-system-x86-13150 [000] ...1 185370.441765: kvm_page_fault: address fd094 error_code 181 qemu-system-x86-13150 [000] d..2 185370.441766: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441767: kvm_exit: reason EPT_VIOLATION rip 0xc45e info 184 0 qemu-system-x86-13150 [000] ...1 185370.441767: kvm_page_fault: address fc45e error_code 184 qemu-system-x86-13150 [000] d..2 185370.441768: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441769: kvm_exit: reason EPT_VIOLATION rip 0xc469 info 181 0 qemu-system-x86-13150 [000] ...1 185370.441769: kvm_page_fault: address feffd066 error_code 181 qemu-system-x86-13150 [000] d..2 185370.441771: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441772: kvm_exit: reason IO_INSTRUCTION rip 0xc469 info 700040 0 qemu-system-x86-13150 [000] ...1 185370.441773: kvm_pio: pio_write at 0x70 size 1 count 1 qemu-system-x86-13150 [000] ...1 185370.441775: kvm_userspace_exit: reason KVM_EXIT_IO (2) qemu-system-x86-13150 [000] ...2 185370.441776: kvm_fpu: unload qemu-system-x86-13150 [000] d..2 185370.441787: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441788: kvm_exit: reason IO_INSTRUCTION rip 0xc46b info 710048 0 qemu-system-x86-13150 [000] ...1 185370.441794: kvm_emulate_insn: f0000:c46b:e4 71 (real) qemu-system-x86-13150 [000] ...1 185370.441796: kvm_pio: pio_read at 0x71 size 1 count 1 qemu-system-x86-13150 [000] ...1 185370.441797: kvm_userspace_exit: reason KVM_EXIT_IO (2) qemu-system-x86-13150 [000] d..2 185370.441804: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441805: kvm_exit: reason IO_INSTRUCTION rip 0xc46d info 920048 0 qemu-system-x86-13150 [000] ...1 185370.441806: kvm_emulate_insn: f0000:c46d:e4 92 (real) qemu-system-x86-13150 [000] ...1 185370.441807: kvm_pio: pio_read at 0x92 size 1 count 1 qemu-system-x86-13150 [000] ...1 185370.441807: kvm_userspace_exit: reason KVM_EXIT_IO (2) qemu-system-x86-13150 [000] d..2 185370.441810: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441811: kvm_exit: reason IO_INSTRUCTION rip 0xc471 info 920040 0 qemu-system-x86-13150 [000] ...1 185370.441811: kvm_pio: pio_write at 0x92 size 1 count 1 qemu-system-x86-13150 [000] ...1 185370.441811: kvm_userspace_exit: reason KVM_EXIT_IO (2) qemu-system-x86-13150 [000] d..2 185370.441813: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441814: kvm_exit: reason EXCEPTION_NMI rip 0xc473 info 0 80000b0d qemu-system-x86-13150 [000] ...1 185370.441817: kvm_emulate_insn: f0000:c473:2e 0f 01 1e e0 d3 (real) qemu-system-x86-13150 [000] d..2 185370.441819: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441820: kvm_exit: reason EXCEPTION_NMI rip 0xc479 info 0 80000b0d qemu-system-x86-13150 [000] ...1 185370.441821: kvm_emulate_insn: f0000:c479:2e 0f 01 16 a0 d3 (real) qemu-system-x86-13150 [000] d..2 185370.441822: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441823: kvm_exit: reason EXCEPTION_NMI rip 0xc47f info 0 80000b0d qemu-system-x86-13150 [000] ...1 185370.441824: kvm_emulate_insn: f0000:c47f:0f 20 c0 (real) qemu-system-x86-13150 [000] d..2 185370.441825: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] d..2 185370.441826: kvm_exit: reason EXCEPTION_NMI rip 0xc486 info 0 80000b0d qemu-system-x86-13150 [000] ...1 185370.441826: kvm_emulate_insn: f0000:c486:0f 22 c0 (real) qemu-system-x86-13150 [000] d..2 185370.441829: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] ...1 185370.441830: kvm_emulate_insn: f0000:c489:66 ea 91 c4 0f 00 08 00 (prot16) qemu-system-x86-13150 [000] d..2 185370.441833: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] ...1 185370.441833: kvm_emulate_insn: f0000:c489:66 ea 91 c4 0f 00 08 00 (prot16) qemu-system-x86-13150 [000] d..2 185370.441834: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] ...1 185370.441835: kvm_emulate_insn: f0000:c489:66 ea 91 c4 0f 00 08 00 (prot16) qemu-system-x86-13150 [000] d..2 185370.441835: kvm_entry: vcpu 0 qemu-system-x86-13150 [000] ...1 185370.441836: kvm_emulate_insn: f0000:c489:66 ea 91 c4 0f 00 08 00 (prot16) qemu-system-x86-13150 [000] d..2 185370.441836: kvm_entry: vcpu 0 [...] Alex