stable inclusion
from stable-v4.19.234
commit dc64af755099d1e51fd64e99fe3a59b75595814a
category: bugfix
bugzilla: 186460, https://gitee.com/src-openeuler/kernel/issues/I53MHA
CVE: CVE-2022-23960

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

commit 9dd78194 upstream.

As per other architectures, add support for reporting the Spectre
vulnerability status via sysfs CPU.
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
[ preserve res variable and add SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED - gregkh ]
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: NLiao Chang <liaochang1@huawei.com>
Signed-off-by: NYongqiang Liu <liuyongqiang13@huawei.com>