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86f7e90ce8
linux/arch/x86/kvm/vmx
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Oliver Upton 86f7e90ce8 KVM: VMX: check descriptor table exits on instruction emulation 
KVM emulates UMIP on hardware that doesn't support it by setting the
'descriptor table exiting' VM-execution control and performing
instruction emulation. When running nested, this emulation is broken as
KVM refuses to emulate L2 instructions by default.

Correct this regression by allowing the emulation of descriptor table
instructions if L1 hasn't requested 'descriptor table exiting'.

Fixes: 07721feee4 ("KVM: nVMX: Don't emulate instructions in guest mode")
Reported-by: Jan Kiszka <jan.kiszka@web.de>
Cc: stable@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-01 19:26:31 +01:00
..
capabilities.h KVM: nVMX: clear PIN_BASED_POSTED_INTR from nested pinbased_ctls only when apicv is globally disabled 2020-02-21 18:05:35 +01:00
evmcs.c x86/kvm/hyper-v: don't allow to turn on unsupported VMX controls for nested guests 2020-02-05 15:55:26 +01:00
evmcs.h x86/kvm/hyper-v: don't allow to turn on unsupported VMX controls for nested guests 2020-02-05 15:55:26 +01:00
nested.c KVM: nVMX: Check IO instruction VM-exit conditions 2020-02-23 10:16:32 +01:00
nested.h KVM: nVMX: Refactor IO bitmap checks into helper function 2020-02-23 10:14:40 +01:00
ops.h KVM: VMX: Add error handling to VMREAD helper 2019-09-25 15:30:09 +02:00
pmu_intel.c KVM: x86: Fix perfctr WRMSR for running counters 2020-02-05 16:01:15 +01:00
vmcs12.c
vmcs12.h KVM/arm updates for 5.3 2019-07-11 15:14:16 +02:00
vmcs_shadow_fields.h KVM: Fix some out-dated function names in comment 2020-01-21 13:57:27 +01:00
vmcs.h KVM: VMX: Leave preemption timer running when it's disabled 2019-06-18 17:10:46 +02:00
vmenter.S x86/asm: Change all ENTRY+ENDPROC to SYM_FUNC_* 2019-10-18 11:58:33 +02:00
vmx.c KVM: VMX: check descriptor table exits on instruction emulation 2020-03-01 19:26:31 +01:00
vmx.h KVM: nVMX: Emulate MTF when performing instruction emulation 2020-02-23 09:36:23 +01:00