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| author | Radim Krčmář <rkrcmar@redhat.com> | 2015-03-17 14:02:32 +0100 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2015-03-18 02:09:17 +0100 |
| commit | 0790ec172de1bd2e23f1dbd4925426b6cc3c1b72 (patch) | |
| tree | b9fb516210262674fff24ceac5caf541360f0b75 /arch/x86/kvm/ioapic.c | |
| parent | Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/ker... (diff) | |
| download | linux-0790ec172de1bd2e23f1dbd4925426b6cc3c1b72.tar.xz linux-0790ec172de1bd2e23f1dbd4925426b6cc3c1b72.zip | |
KVM: nVMX: mask unrestricted_guest if disabled on L0
If EPT was enabled, unrestricted_guest was allowed in L1 regardless of
L0. L1 triple faulted when running L2 guest that required emulation.
Another side effect was 'WARN_ON_ONCE(vmx->nested.nested_run_pending)'
in L0's dmesg:
WARNING: CPU: 0 PID: 0 at arch/x86/kvm/vmx.c:9190 nested_vmx_vmexit+0x96e/0xb00 [kvm_intel] ()
Prevent this scenario by masking SECONDARY_EXEC_UNRESTRICTED_GUEST when
the host doesn't have it enabled.
Fixes: 78051e3b7e35 ("KVM: nVMX: Disable unrestricted mode if ept=0")
Cc: stable@vger.kernel.org
Tested-By: Kashyap Chamarthy <kchamart@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/ioapic.c')
0 files changed, 0 insertions, 0 deletions