Messages in this thread | | | Date | Thu, 23 Apr 2015 23:46:16 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH] x86/asm/entry/32: Restore %ss before SYSRETL if necessary |
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On Thu, Apr 23, 2015 at 02:37:27PM -0700, H. Peter Anvin wrote: > Yes, the NULL SS is a special thing in 64-bit mode. I agree that > context-switching it is probably the way to go; it should be cheap > enough. We might even be able to conditionalize it on an X86_BUG_ > flag.
Oh sure, I was thinking of an AMD-specific
"call amd_fixup_ss"
which gets NOPped out on Intel.
We do those for breakfast :-)
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply. --
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