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| author | Huaitong Han <huaitong.han@intel.com> | 2016-01-12 11:04:20 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-01-12 13:42:16 +0300 |
| commit | 45bdbcfdf241149642fb6c25ab0c209d59c371b7 (patch) | |
| tree | 51e626bec2fee316a1e5cd61873c26cb725e1ab0 /arch/x86/kvm/x86.c | |
| parent | ac3e5fcae8ca658e7dcc3fdcd50af7e4779f58c1 (diff) | |
| download | linux-45bdbcfdf241149642fb6c25ab0c209d59c371b7.tar.xz | |
kvm: x86: Fix vmwrite to SECONDARY_VM_EXEC_CONTROL
vmx_cpuid_tries to update SECONDARY_VM_EXEC_CONTROL in the VMCS, but
it will cause a vmwrite error on older CPUs because the code does not
check for the presence of CPU_BASED_ACTIVATE_SECONDARY_CONTROLS.
This will get rid of the following trace on e.g. Core2 6600:
vmwrite error: reg 401e value 10 (err 12)
Call Trace:
[<ffffffff8116e2b9>] dump_stack+0x40/0x57
[<ffffffffa020b88d>] vmx_cpuid_update+0x5d/0x150 [kvm_intel]
[<ffffffffa01d8fdc>] kvm_vcpu_ioctl_set_cpuid2+0x4c/0x70 [kvm]
[<ffffffffa01b8363>] kvm_arch_vcpu_ioctl+0x903/0xfa0 [kvm]
Fixes: feda805fe7c4ed9cf78158e73b1218752e3b4314
Cc: stable@vger.kernel.org
Reported-by: Zdenek Kaspar <zkaspar82@gmail.com>
Signed-off-by: Huaitong Han <huaitong.han@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
0 files changed, 0 insertions, 0 deletions