KVM: VMX: Add helper to check if the guest PMU has PERF_GLOBAL_CTRL

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2119111



commit b663f0b5
Author: Sean Christopherson <seanjc@google.com>
Date:   Fri Jul 22 22:44:07 2022 +0000

    KVM: VMX: Add helper to check if the guest PMU has PERF_GLOBAL_CTRL

    Add a helper to check of the guest PMU has PERF_GLOBAL_CTRL, which is
    unintuitive _and_ diverges from Intel's architecturally defined behavior.
    Even worse, KVM currently implements the check using two different (but
    equivalent) checks, _and_ there has been at least one attempt to add a
    _third_ flavor.

    Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
    Message-Id: <20220722224409.1336532-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>