[PATCH 0/6] x86-64: Remove global variables from boot

Brian Gerst
2023-02-22T22:13:48Z

This is on top of the parallel boot v10 series.

Remove the global variables initial_gs, initial_stack, and
early_gdt_descr from the 64-bit boot code. The stack, GDT, and GSBASE
can be determined from the CPU number.

Brian Gerst (6):
x86/smpboot: Use CPU number instead of APIC ID for single CPU startup
x86/smpboot: Use current_task to get idle thread
x86/smpboot: Remove initial_stack on 64-bit
x86/smpbppt: Remove early_gdt_descr on 64-bit
x86/smpboot: Remove initial_gs
x86/smpboot: Simplify boot CPU setup

arch/x86/include/asm/processor.h | 6 +-
arch/x86/include/asm/realmode.h | 1 -
arch/x86/include/asm/smp.h | 1 -
arch/x86/kernel/acpi/sleep.c | 5 +-
arch/x86/kernel/asm-offsets.c | 1 +
arch/x86/kernel/head_64.S | 108 ++++++++++++-------------------
arch/x86/kernel/smpboot.c | 6 +-
arch/x86/xen/xen-head.S | 2 +-
kernel/smpboot.c | 2 +-
9 files changed, 53 insertions(+), 79 deletions(-)

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2.39.2