Messages in this thread | | | From | Denys Vlasenko <> | Date | Fri, 24 Apr 2015 01:22:46 +0200 | Subject | Re: [PATCH] x86/asm/entry/32: Restore %ss before SYSRETL if necessary |
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On Fri, Apr 24, 2015 at 1:04 AM, Linus Torvalds <torvalds@linux-foundation.org> wrote: > And at that point,> the only cost is a a single no-op on most CPU's (we still don't know > _which_ AMD CPU's are affected, but I guess we could start off with > all of them and see if we can get an exhaustive list some way).
This seems to be "architectural" for AMD CPU's, similar to Intel's SYSRET bug with non-canonical return address. Meaning, both bugs, are documented by respective companies. Both are officially "not a bug, but a feature".
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