KVM: x86: Add module parameter for supporting VMware backdoor

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Support access to VMware backdoor requires KVM to intercept #GP
exceptions from guest which introduce slight performance hit.
Therefore, control this support by module parameter.

Note that module parameter is exported as it should be consumed by
kvm_intel & kvm_amd to determine if they should intercept #GP or not.

This commit doesn't change semantics.
It is done as a preparation for future commits.

Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

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Liran Alon 2018-03-12 13:12:47 +02:00 • committed by Paolo Bonzini

parent dca7f1284f

commit c4ae60e4bb

3 changed files with 9 additions and 0 deletions

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3

Documentation/admin-guide/kernel-parameters.txt

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4

arch/x86/kvm/x86.c

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2

arch/x86/kvm/x86.h

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