mainline inclusion
from mainline-v5.1-rc1
commit 164bf7e5
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4MKP4
CVE: NA

--------------------------------

...now that KVM won't explode by moving it out of bit 0.  Using bit 63
eliminates the need to jump over bit 0, e.g. when calculating a new
memslots generation or when propagating the memslots generation to an
MMIO spte.
Signed-off-by: NSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> #openEuler_contributor
Signed-off-by: NLaibin Qiu <qiulaibin@huawei.com>
Reviewed-by: NZenghui Yu <yuzenghui@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>