Thomas Gleixner f6f1ae9128 x86/smpboot: Implement a bit spinlock to protect the realmode stack ... Parallel AP bringup requires that the APs can run fully parallel through the early startup code including the real mode trampoline. To prepare for this implement a bit-spinlock to serialize access to the real mode stack so that parallel upcoming APs are not going to corrupt each others stack while going through the real mode startup code. Co-developed-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Tested-by: Helge Deller <deller@gmx.de> # parisc Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck Link: https://lore.kernel.org/r/20230512205257.355425551@linutronix.de		2023-05-15 13:45:03 +02:00
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rm	x86/smpboot: Implement a bit spinlock to protect the realmode stack	2023-05-15 13:45:03 +02:00
init.c	x86/smpboot: Implement a bit spinlock to protect the realmode stack	2023-05-15 13:45:03 +02:00
Makefile	x86, objtool: Dont exclude arch/x86/realmode/	2021-05-12 14:54:54 +02:00
rmpiggy.S	x86/asm/realmode: Use SYM_DATA_* instead of GLOBAL	2019-10-18 11:28:47 +02:00