Messages in this thread | | | Date | Tue, 11 Nov 2014 20:54:38 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 3/6] x86: Add support for the clwb instruction |
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On Tue, Nov 11, 2014 at 12:48:52PM -0700, Ross Zwisler wrote: > Essentially we need one additional byte at the beginning of the clflush so > that we can flip it into a clflushopt by changing that byte into a 0x66 > prefix. Two options are to either insert a 1 byte ASM_NOP1, or to add a 1 > byte NOP_DS_PREFIX. Both have no functional effect with the plain clflush, > but I've been told that executing a clflush + prefix should be faster than > executing a clflush + NOP.
I see. :)
Thanks.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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