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6a33979d5b
linux/arch/x86/kvm
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Paolo Bonzini f439ed27f8 kvm: do not handle APIC access page if in-kernel irqchip is not in use 
This fixes the following OOPS:

   loaded kvm module (v3.17-rc1-168-gcec26bc)
   BUG: unable to handle kernel paging request at fffffffffffffffe
   IP: [<ffffffff81168449>] put_page+0x9/0x30
   PGD 1e15067 PUD 1e17067 PMD 0
   Oops: 0000 [#1] PREEMPT SMP
    [<ffffffffa063271d>] ? kvm_vcpu_reload_apic_access_page+0x5d/0x70 [kvm]
    [<ffffffffa013b6db>] vmx_vcpu_reset+0x21b/0x470 [kvm_intel]
    [<ffffffffa0658816>] ? kvm_pmu_reset+0x76/0xb0 [kvm]
    [<ffffffffa064032a>] kvm_vcpu_reset+0x15a/0x1b0 [kvm]
    [<ffffffffa06403ac>] kvm_arch_vcpu_setup+0x2c/0x50 [kvm]
    [<ffffffffa062e540>] kvm_vm_ioctl+0x200/0x780 [kvm]
    [<ffffffff81212170>] do_vfs_ioctl+0x2d0/0x4b0
    [<ffffffff8108bd99>] ? __mmdrop+0x69/0xb0
    [<ffffffff812123d1>] SyS_ioctl+0x81/0xa0
    [<ffffffff8112a6f6>] ? __audit_syscall_exit+0x1f6/0x2a0
    [<ffffffff817229e9>] system_call_fastpath+0x16/0x1b
   Code: c6 78 ce a3 81 4c 89 e7 e8 d9 80 ff ff 0f 0b 4c 89 e7 e8 8f f6 ff ff e9 fa fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 <48> f7 07 00 c0 00 00 55 48 89 e5 75 1e 8b 47 1c 85 c0 74 27 f0
   RIP  [<ffffffff81193045>] put_page+0x5/0x50

when not using the in-kernel irqchip ("-machine kernel_irqchip=off"
with QEMU).  The fix is to make the same check in
kvm_vcpu_reload_apic_access_page that we already have
in vmx.c's vm_need_virtualize_apic_accesses().

Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
Tested-by: Jan Kiszka <jan.kiszka@siemens.com>
Fixes: 4256f43f9f
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-02 19:26:11 +02:00
..
cpuid.c KVM: nested VMX: disable perf cpuid reporting 2014-09-24 14:07:50 +02:00
cpuid.h KVM: x86: Warn if guest virtual address space is not 48-bits 2014-09-24 14:07:48 +02:00
emulate.c KVM: x86: emulating descriptor load misses long-mode case 2014-09-24 14:07:52 +02:00
i8254.c KVM: x86: limit PIT timer frequency 2014-01-15 12:43:54 +01:00
i8254.h KVM: fold kvm_pit_timer into kvm_kpit_state 2012-08-01 00:21:07 -03:00
i8259.c KVM: inject ExtINT interrupt before APIC interrupts 2012-12-13 23:05:21 -02:00
irq.c KVM: nVMX: fix "acknowledge interrupt on exit" when APICv is in use 2014-08-05 15:00:24 +02:00
irq.h KVM: switch to symbolic name for irq_states size 2012-07-20 16:12:16 -03:00
Kconfig KVM: Give IRQFD its own separate enabling Kconfig option 2014-08-05 14:26:28 +02:00
kvm_cache_regs.h KVM: MMU: Do not unconditionally read PDPTE from guest memory 2011-09-25 19:18:01 +03:00
lapic.c KVM: x86: make apic_accept_irq tracepoint more generic 2014-09-11 11:51:02 +02:00
lapic.h KVM: x86: Validate guest writes to MSR_IA32_APICBASE 2014-01-27 14:39:44 +01:00
Makefile kvm: Add VFIO device 2013-10-30 19:02:03 +01:00
mmu_audit.c arch/x86: replace strict_strto calls 2014-08-08 15:57:28 -07:00
mmu.c kvm: Fix page ageing bugs 2014-09-24 14:07:58 +02:00
mmu.h KVM: mmio: cleanup kvm_set_mmio_spte_mask 2014-09-03 10:04:10 +02:00
mmutrace.h x86/kvm: Resolve shadow warnings in macro expansion 2014-07-31 16:33:29 +02:00
paging_tmpl.h KVM: x86: Remove debug assertion of non-PAE reserved bits 2014-09-24 14:07:55 +02:00
pmu.c KVM: x86: Clarify PMU related features bit manipulation 2014-08-20 13:01:25 +02:00
svm.c kvm: Use APIC_DEFAULT_PHYS_BASE macro as the apic access page address. 2014-09-11 11:10:22 +02:00
trace.h KVM: x86: make apic_accept_irq tracepoint more generic 2014-09-11 11:51:02 +02:00
tss.h KVM: x86: hardware task switching support 2008-04-27 12:00:39 +03:00
vmx.c kvm: x86: Unpin and remove kvm_arch->apic_access_page 2014-09-24 14:08:01 +02:00
x86.c kvm: do not handle APIC access page if in-kernel irqchip is not in use 2014-10-02 19:26:11 +02:00
x86.h KVM: vmx: Inject #GP on invalid PAT CR 2014-09-24 14:07:52 +02:00