Since the BSP bit is writable on real hardware, during reset all the CPUs which
were not chosen to be the BSP should have their BSP bit cleared. This fix is
required for KVM to work correctly when it changes the BSP bit.
An additional fix is required for QEMU tcg to allow software to change the BSP
bit.
Backports commit 9cb11fd7539b5b787d8fb3834004804a58dd16ae from qemu
The APIC ID compatibility code is required only for PC, and now that
x86_cpu_initfn() doesn't use x86_cpu_apic_id_from_index() anymore, that
code can be moved to pc.c.
Backports commit de13197a38cf45c990802661a057f64a05426cbc from qemu
Instead of setting APIC ID automatically when creating a X86CPU, require
the property to be set before realizing the object (which all callers of
cpu_x86_create() already do).
Backports commit e1356dd70aef11425883dd4d2885f1d208eb9d57 from qemu
The PC CPU initialization code already sets apic-id based on the CPU
topology, and CONFIG_USER doesn't need the topology-based APIC ID
calculation code.
Make CONFIG_USER set apic-id before realizing the CPU (just like PC
already does), so we can simplify x86_cpu_initfn later. As there is no
CPU topology configuration in CONFIG_USER, just use cpu_index as the
APIC ID.
Backports commit 9c235e83f1c3437be6ca45755909efb745c10deb from qemu
The field doesn't need to be inside CPUState, and it is not specific for
the CPUID instruction, so move and rename it.
Backports commit 9e9d3863adcbd1ffeca30f240f49805b00ba0d87 from qemu
Instead of putting extra logic inside cpu.h, just do everything inside
cpu_x86_init_user().
Backports commit 15258d46baef5f8265ad5f1002905664cf58f051 from qem
The function was used in only two places. In one of them, the function
made the code less readable by requiring temporary te[bcd]x variables.
In the other one we can simply inline the existing code.
Backports commit 08e1a1e5a175ecbfdb761db5a62090498f736969 from qemu
