KVM: nVMX: Add helper to handle TLB flushes on nested VM-Enter/VM-Exit

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Add a helper to determine whether or not a full TLB flush needs to be
performed on nested VM-Enter/VM-Exit, as the logic is identical for both
flows and needs a fairly beefy comment to boot.  This also provides a
common point to make future adjustments to the logic.

Handle vpid12 changes the new helper as well even though it is specific
to VM-Enter.  The vpid12 logic is an extension of the flushing logic,
and it's worth the extra bool parameter to provide a single location for
the flushing logic.

Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200320212833.3507-24-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

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Sean Christopherson 2020-03-20 14:28:19 -07:00 • committed by Paolo Bonzini

parent 7780938cc7

commit 50b265a4ee

1 changed files with 44 additions and 44 deletions

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arch/x86/kvm/vmx/nested.c

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