[Webkit-unassigned] [Bug 188145] Hardcoded LFENCE instruction

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=188145

--- Comment #9 from karogyoker2+webkit at gmail.com ---
I wouldn't mention the Windows 7 example here, because in case of Firefox or Chromium they made a statement and they ended support for machines without SSE2 on purpose but in the Windows 7 case they made a programming mistake when mitigating the Spectre vulnerability, so it is a bug.

https://www.askwoody.com/2018/pentium-iii-users-knocked-out-of-win7-patches/

https://www.gizmodo.com.au/2018/06/microsoft-quietly-drops-support-for-non-sse2-cpus-in-windows-7/

Microsoft also had problems with CPUs which have SSE2 but Windows couldn't boot anymore after the update:
https://www.computerworld.com/article/3247676/microsoft-windows/microsofts-mystifying-meltdownspectre-patches-for-amd-processors.html

https://www.theverge.com/2018/1/9/16867068/microsoft-meltdown-spectre-security-updates-amd-pcs-issues

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