Re: [PATCH 1/2] KVM: VMX: Drop obsolete branch hint prefixes from inline asm
From: Christian Ludloff
Date: Thu Feb 12 2026 - 00:35:28 EST
Andrew Cooper wrote:
> The branch-taken hint has new meaning in Lion Cove cores and later,
> along with a warning saying "performance penalty for misuse".
Make that Redwood Cove. For details, see the
Intel ORM Vol1 #248966-050 Section 2.1.1.1.
Also, for the sake of completeness, the officially
undocumented old "Alternate Taken/Not Taken"
hint on the P4 (prefix 0x64) is covered in Agner
Vol3 Section 3.4; in the 2025-12-14 pdf you can
find it in the top half of page 26 of 277.
--
C.