过一个晚上没看到有人 po
"CrossTalk" / SRBDS Is The Newest Side-Channel Vulnerability
https://bit.ly/2XQkFfg
CrossTalk/SRBDS Shows Possibility Of Leaking Information Across Physical CPU
Cores
https://bit.ly/3dMOa7e
Intel 已经释出给 Linux 用的 microcode (Haswell 到 Coffee Lake)
RdRand Performance As Bad As ~3% Original Speed With CrossTalk/SRBDS
Mitigation
https://bit.ly/2Yl2ME5
新的 microcode 把硬件乱数产生器的效能降到剩 3%
不过对一般 user 应该是没差
后续消息有兴趣就自己追 phoronix 吧