conf/machine/include: add x86-64-v3 tunes (AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, XSAVE)

Qemu 7.2 finally allows us to move beyond building for original Core 2/Core i7 era hardware,
and this patch adds support for the newer generations. But first, a bit of
background:

Recently toolchains gained support for specifying x86-64 'levels' of
instruction set support; v3 corresponds to 2013-era Haswell CPUs
(and later), with AVX, AVX2 and a few other instructions that
were introduced in that generation. I believe this is preferrable
to picking a specific CPU model as the baseline.

Here's Phoronix's feature article that explains the feature and the available levels:

"Both LLVM Clang 12 and GCC 11 are ready to go in offering the new x86-64-v2, x86-64-v3, and x86-64-v4 targets.

These x86_64 micro-architecture feature levels have been about coming up with a few "classes" of Intel/AMD CPU processor support rather than continuing to rely on just the x86_64 baseline or targeting a
specific CPU family for optimizations. These new levels make it easier to raise the base requirements around Linux x86-64 whether it be for a Linux distribution or a particular software application where
the developer/ISV may be wanting to compile with greater instruction set extensions enabled in catering to more recent Intel/AMD CPUs."

https://www.phoronix.com/news/GCC-11-x86-64-Feature-Levels

Here's gcc docs for it:
https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

And here's the formal specification (click on the pdf link):
https://gitlab.com/x86-psABIs/x86-64-ABI

The actual tune file was created by copying corei7 tunes and doing
search/replace on them. Qemu options were dropped as unnecessary.
32 bit tune was dropped as well, as there is no 32 bit only CPU
that also supports these new instructions; all of the v3 capable
chips are 64 bit.

(From OE-Core rev: ac041f90e71dba83b7144c91f929de88aaeae519)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions