KVM: vmx: Add tlb_remote_flush callback support

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Register tlb_remote_flush callback for vmx when hyperv capability of
nested guest mapping flush is detected. The interface can help to
reduce overhead when flush ept table among vcpus for nested VM. The
tradition way is to send IPIs to all affected vcpus and executes
INVEPT on each vcpus. It will trigger several vmexits for IPI
and INVEPT emulation. Hyper-V provides such hypercall to do
flush for all vcpus and call the hypercall when all ept table
pointers of single VM are same.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Tianyu Lan 2018-07-19 08:40:23 +00:00 • committed by Paolo Bonzini

parent b08660e59d

commit 877ad952be

1 changed files with 71 additions and 1 deletions

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arch/x86/kvm/vmx.c

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