ef7d1adfa8
Add a Meson option to configure which x86-64 instruction set to use. QEMU will now default to x86-64-v1 + cmpxchg16b for 64-bit builds (that corresponds to a Pentium 4 for 32-bit builds). The baseline can be tuned down to Pentium Pro for 32-bit builds (with -Dx86_version=0), or up as desired. Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>