Documentation/hw-vuln: Add documentation for Cross-Thread Return Predictions

stable inclusion
from stable-v5.15.94
commit 17170acdc7c8b8585501bb443b4f196168ae9890
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6FB6C
CVE: CVE-2022-27672

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=17170acdc7c8b8585501bb443b4f196168ae9890



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commit 493a2c2d upstream.

Add the admin guide for the Cross-Thread Return Predictions vulnerability.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <60f9c0b4396956ce70499ae180cb548720b25c7e.1675956146.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Guo Mengqi <guomengqi3@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>