!2069 x86/speculation: Add Gather Data Sampling mitigation

Merge Pull Request from: @ci-robot 
 
PR sync from: Zeng Heng <zengheng4@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/WXS53YRSK5WB5LJVV5GDV6HS3LH52HJC/ 
Arnd Bergmann (2):
  x86/speculation: Add cpu_show_gds() prototype
  x86: Move gds_ucode_mitigated() declaration to header

Daniel Sneddon (4):
  x86/speculation: Add Gather Data Sampling mitigation
  x86/speculation: Add force option to GDS mitigation
  x86/speculation: Add Kconfig option for GDS
  KVM: Add GDS_NO support to KVM

Dave Hansen (2):
  Documentation/x86: Fix backwards on/off logic about YMM support
  x86/speculation: Mark all Skylake CPUs as vulnerable to GDS


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2.25.1
 
https://gitee.com/openeuler/kernel/issues/I7XLNT 
 
Link:https://gitee.com/openeuler/kernel/pulls/2069

 

Reviewed-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Liu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>