Wanpeng Li 910053002e KVM: lapic: fix access preemption timer stuff even if kernel_irqchip=off ... BUG: unable to handle kernel NULL pointer dereference at 000000000000008c IP: [<ffffffffc04e0180>] kvm_lapic_hv_timer_in_use+0x10/0x20 [kvm] PGD 0 Oops: 0000 [#1] SMP Call Trace: kvm_arch_vcpu_load+0x86/0x260 [kvm] vcpu_load+0x46/0x60 [kvm] kvm_vcpu_ioctl+0x79/0x7c0 [kvm] ? __lock_is_held+0x54/0x70 do_vfs_ioctl+0x96/0x6a0 ? __fget_light+0x2a/0x90 SyS_ioctl+0x79/0x90 do_syscall_64+0x7c/0x1e0 entry_SYSCALL64_slow_path+0x25/0x25 RIP [<ffffffffc04e0180>] kvm_lapic_hv_timer_in_use+0x10/0x20 [kvm] RSP <ffff8800db1f3d70> CR2: 000000000000008c ---[ end trace a55fb79d2b3b4ee8 ]--- This can be reproduced steadily by kernel_irqchip=off. We should not access preemption timer stuff if lapic is emulated in userspace. This patch fix it by avoiding access preemption timer stuff when kernel_irqchip=off. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Yunhong Jiang <yunhong.jiang@intel.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2016-08-04 14:21:43 +02:00
..
boot	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-08-02 16:37:12 -04:00
configs	arch/defconfig: remove CONFIG_RESOURCE_COUNTERS	2016-05-23 17:04:14 -07:00
crypto	x86, crypto: Restore MODULE_LICENSE() to glue_helper.c so it loads	2016-07-20 09:39:50 +02:00
entry	x86: vdso: use __pvclock_read_cycles	2016-08-04 13:52:21 +02:00
events	Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-08-01 14:23:42 -04:00
ia32	mm: remove more IS_ERR_VALUE abuses	2016-05-27 15:57:31 -07:00
include	pvclock: introduce seqcount-like API	2016-08-04 13:52:21 +02:00
kernel	pvclock: introduce seqcount-like API	2016-08-04 13:52:21 +02:00
kvm	KVM: lapic: fix access preemption timer stuff even if kernel_irqchip=off	2016-08-04 14:21:43 +02:00
lguest	lguest: Read offset of device_cap later	2016-06-10 11:39:09 +02:00
lib	Merge branch 'x86-headers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-08-01 14:23:42 -04:00
math-emu
mm	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
net	bpf, x86: add support for constant blinding	2016-05-16 13:49:32 -04:00
oprofile	x86/cpufeature: Replace cpu_has_apic with boot_cpu_has() usage	2016-04-13 11:37:41 +02:00
pci	PCI changes for the v4.8 merge window:	2016-08-02 17:12:29 -04:00
platform	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
power	x86/power/64: Fix hibernation return address corruption	2016-07-29 13:38:59 +02:00
purgatory	Add sancov plugin	2016-06-07 22:57:10 +02:00
ras	x86/RAS/AMD: Reduce the number of IPIs when prepping error injection	2016-07-08 11:29:26 +02:00
realmode	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-08-02 16:37:12 -04:00
tools	x86/insn: Add AVX-512 support to the instruction decoder	2016-07-21 09:37:11 -03:00
um	x86: Audit and remove any remaining unnecessary uses of module.h	2016-07-14 15:07:00 +02:00
video	x86/video: Don't assume all FB devices are PCI devices	2016-03-15 11:08:26 +01:00
xen	kexec: allow kdump with crash_kexec_post_notifiers	2016-08-02 19:35:30 -04:00
.gitignore
Kbuild	perf/x86: Move perf_event.c ............... => x86/events/core.c	2016-02-09 10:23:49 +01:00
Kconfig	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-08-02 16:37:12 -04:00
Kconfig.cpu
Kconfig.debug	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-03-15 09:32:27 -07:00
Makefile	kbuild: abort build on bad stack protector flag	2016-07-26 16:19:19 -07:00
Makefile_32.cpu
Makefile.um