Thomas Gleixner 33e20b07be x86/realmode: Make stack lock work in trampoline_compat() ... The stack locking and stack assignment macro LOAD_REALMODE_ESP fails to work when invoked from the 64bit trampoline entry point: trampoline_start64 trampoline_compat LOAD_REALMODE_ESP <- lock Accessing tr_lock is only possible from 16bit mode. For the compat entry point this needs to be pa_tr_lock so that the required relocation entry is generated. Otherwise it locks the non-relocated address which is aside of being wrong never cleared in secondary_startup_64() causing all but the first CPU to get stuck on the lock. Make the macro take an argument lock_pa which defaults to 0 and rename it to LOCK_AND_LOAD_REALMODE_ESP to make it clear what this is about. Fixes: f6f1ae9128 ("x86/smpboot: Implement a bit spinlock to protect the realmode stack") Reported-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: https://lore.kernel.org/r/87h6rujdvl.ffs@tglx		2023-05-30 14:11:47 +02:00
..
rm	x86/realmode: Make stack lock work in trampoline_compat()	2023-05-30 14:11:47 +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