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linux/arch/x86/kvm
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David Hildenbrand 5c0aea0e8d KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 
We needed the lock to avoid racing with creation of the irqchip on x86. As
kvm_set_irq_routing() calls srcu_synchronize_expedited(), this lock
might be held for a longer time.

Let's introduce an arch specific callback to check if we can actually
add irq routes. For x86, all we have to do is check if we have an
irqchip in the kernel. We don't need kvm->lock at that point as the
irqchip is marked as inititalized only when actually fully created.

Reported-by: Steve Rutherford <srutherford@google.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Fixes: 1df6ddede1 ("KVM: x86: race between KVM_SET_GSI_ROUTING and KVM_CREATE_IRQCHIP")
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-05-02 14:45:45 +02:00
..
cpuid.c KVM: x86: virtualize cpuid faulting 2017-04-21 12:50:06 +02:00
cpuid.h KVM: x86: virtualize cpuid faulting 2017-04-21 12:50:06 +02:00
debugfs.c kvm: x86: export TSC information to user-space 2016-09-16 16:57:48 +02:00
emulate.c KVM: x86: fix emulation of RSM and IRET instructions 2017-04-27 16:54:09 +02:00
hyperv.c sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h> 2017-03-02 08:42:39 +01:00
hyperv.h KVM: x86: Hyper-V tsc page setup 2016-09-20 09:26:20 +02:00
i8254.c KVM: x86: Handle the kthread worker using the new API 2016-12-08 15:31:11 +01:00
i8254.h KVM: x86: Handle the kthread worker using the new API 2016-12-08 15:31:11 +01:00
i8259.c KVM: x86: simplify pic_ioport_read() 2017-04-12 20:17:15 +02:00
ioapic.c KVM: x86: rename kvm_vcpu_request_scan_ioapic() 2017-04-12 20:17:14 +02:00
ioapic.h KVM: x86: convert kvm_(set|get)_ioapic() into void 2017-04-12 20:17:14 +02:00
irq_comm.c KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
irq.c KVM: x86: get rid of pic_irqchip() 2017-04-12 20:17:13 +02:00
irq.h KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
Kconfig KVM: x86: drop legacy device assignment 2017-04-07 16:49:00 +02:00
kvm_cache_regs.h KVM, pkeys: add pkeys support for permission_fault 2016-03-22 16:23:37 +01:00
lapic.c KVM: Support vCPU-based gfn->hva cache 2017-02-16 18:42:46 +01:00
lapic.h KVM: x86: preparatory changes for APICv cleanups 2017-02-15 14:54:34 +01:00
Makefile KVM: x86: drop legacy device assignment 2017-04-07 16:49:00 +02:00
mmu_audit.c kvm: rename pfn_t to kvm_pfn_t 2016-01-15 17:56:32 -08:00
mmu.c kvm: nVMX: support EPT accessed/dirty bits 2017-04-07 16:49:00 +02:00
mmu.h kvm: nVMX: support EPT accessed/dirty bits 2017-04-07 16:49:00 +02:00
mmutrace.h tracing: Rename ftrace_event.h to trace_events.h 2015-05-13 14:05:12 -04:00
mtrr.c KVM: MTRR: fix kvm_mtrr_check_gfn_range_consistency page fault 2016-07-05 16:14:43 +02:00
page_track.c KVM: x86: cleanup the page tracking SRCU instance 2017-03-28 14:08:02 +02:00
paging_tmpl.h kvm: nVMX: support EPT accessed/dirty bits 2017-04-07 16:49:00 +02:00
pmu_amd.c perf/x86/amd: Make HW_CACHE_REFERENCES and HW_CACHE_MISSES measure L2 2016-09-16 16:19:49 +02:00
pmu_intel.c KVM: x86: Fix typos 2016-06-14 11:16:28 +02:00
pmu.c KVM: x86: never specify a sample period for virtualized in_tx_cp counters 2017-03-01 14:19:46 +01:00
pmu.h KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch 2015-06-23 14:12:14 +02:00
svm.c kvm: better MWAIT emulation for guests 2017-04-21 12:50:28 +02:00
trace.h KVM: x86: support using the vmx preemption timer for tsc deadline timer 2016-06-16 10:07:48 +02:00
tss.h
vmx.c kvm: nVMX: Remove superfluous VMX instruction fault checks 2017-04-27 17:05:43 +02:00
x86.c KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
x86.h kvm: better MWAIT emulation for guests 2017-04-21 12:50:28 +02:00