KVM: x86: hyper-v: Expose support for extended gva ranges for flush hypercalls
Extended GVA ranges support bit seems to indicate whether lower 12 bits of GVA can be used to specify up to 4095 additional consequent GVAs to flush. This is somewhat described in TLFS. Previously, KVM was handling HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} requests by flushing the whole VPID so technically, extended GVA ranges were already supported. As such requests are handled more gently now, advertizing support for extended ranges starts making sense to reduce the size of TLB flush requests. Reviewed-by: NMaxim Levitsky <mlevitsk@redhat.com> Reviewed-by: NSean Christopherson <seanjc@google.com> Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Message-Id: <20221101145426.251680-13-vkuznets@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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