mainline inclusion
from mainline-v5.6
commit 168d918f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5SDUS
CVE: NA

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

The sample_period of a counter tracks when that counter will
overflow and set global status/trigger a PMI. However this currently
only gets set when the initial counter is created or when a counter is
resumed; this updates the sample period after a wrmsr so running
counters will accurately reflect their new value.
Signed-off-by: NEric Hankland <ehankland@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NYanan Wang <wangyanan55@huawei.com>
[Yanan Wang: Adapt the code to linux v4.19]
Reviewed-by: NZenghui Yu <yuzenghui@huawei.com>
Signed-off-by: NLaibin Qiu <qiulaibin@huawei.com>