This allows us to
- test those more recent instruction sets (AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, XSAVE)
- benefit from improved performance across the stack both in kvm-driven system emulation and when running
on real silicon.
For example, glibc:
https://www.phoronix.com/news/Glibc-strcasecmp-AVX2-EVEX

v4 level is adding AVX-512, which is far less established, particularly Intel has famously backtracked
from supporting it in Alder Lake/Raport Lake client CPUs and AMD has only implemented it in very recent Zen4 products:
https://www.phoronix.com/news/GCC-11-x86-64-Feature-Levels

Signed-off-by: Alexander Kanavin <alex@...>
---
meta/conf/machine/include/x86/qemuboot-x86.inc | 4 ++--
meta/conf/machine/qemux86-64.conf | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/meta/conf/machine/include/x86/qemuboot-x86.inc b/meta/conf/machine/include/x86/qemuboot-x86.inc
index 3953679366..31db1b2a61 100644
--- a/meta/conf/machine/include/x86/qemuboot-x86.inc
+++ b/meta/conf/machine/include/x86/qemuboot-x86.inc
@@ -4,8 +4,8 @@ QB_SMP = "-smp 4"
QB_CPU:x86 = "-cpu IvyBridge -machine q35,i8042=off"
QB_CPU_KVM:x86 = "-cpu IvyBridge -machine q35,i8042=off"

-QB_CPU:x86-64 = "-cpu IvyBridge -machine q35,i8042=off"
-QB_CPU_KVM:x86-64 = "-cpu IvyBridge -machine q35,i8042=off"
+QB_CPU:x86-64 = "-cpu Skylake-Client -machine q35,i8042=off"
+QB_CPU_KVM:x86-64 = "-cpu Skylake-Client -machine q35,i8042=off"

QB_AUDIO_DRV = "alsa"
QB_AUDIO_OPT = "-device AC97"
diff --git a/meta/conf/machine/qemux86-64.conf b/meta/conf/machine/qemux86-64.conf
index 8640867911..ba8ed21707 100644
--- a/meta/conf/machine/qemux86-64.conf
+++ b/meta/conf/machine/qemux86-64.conf
@@ -9,8 +9,8 @@ PREFERRED_PROVIDER_virtual/libgles2 ?= "mesa"
PREFERRED_PROVIDER_virtual/libgles3 ?= "mesa"

require conf/machine/include/qemu.inc
-DEFAULTTUNE ?= "core2-64"
-require conf/machine/include/x86/tune-corei7.inc
+DEFAULTTUNE ?= "x86-64-v3-64"
+require conf/machine/include/x86/tune-x86-64-v3.inc
require conf/machine/include/x86/qemuboot-x86.inc

UBOOT_MACHINE ?= "qemu-x86_64_defconfig"
--
2.30.2