OrgACRN
/
acrn-kernel
mirror of https://github.com/projectacrn/acrn-kernel.git
1
0
Fork 0
Code Issues Releases Wiki Activity

init: Invoke arch_cpu_finalize_init() earlier 

commit 9df9d2f047 upstream

X86 is reworking the boot process so that initializations which are not
required during early boot can be moved into the late boot process and out
of the fragile and restricted initial boot phase.

arch_cpu_finalize_init() is the obvious place to do such initializations,
but arch_cpu_finalize_init() is invoked too late in start_kernel() e.g. for
initializing the FPU completely. fork_init() requires that the FPU is
initialized as the size of task_struct on X86 depends on the size of the
required FPU register buffer.

Fortunately none of the init calls between calibrate_delay() and
arch_cpu_finalize_init() is relevant for the functionality of
arch_cpu_finalize_init().

Invoke it right after calibrate_delay() where everything which is relevant
for arch_cpu_finalize_init() has been set up already.

No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Link: https://lore.kernel.org/r/20230613224545.612182854@linutronix.de
Signed-off-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Gleixner 2023-08-01 16:36:25 +02:00 committed by Greg Kroah-Hartman
parent a3342c60dc
commit 8183a89caf
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
init/main.c
View File

@ -1107,6 +1107,9 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
late_time_init(); late_time_init();
sched_clock_init(); sched_clock_init();
calibrate_delay(); calibrate_delay();
arch_cpu_finalize_init();
pid_idr_init(); pid_idr_init();
anon_vma_init(); anon_vma_init();
#ifdef CONFIG_X86 #ifdef CONFIG_X86
@ -1135,8 +1138,6 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
poking_init(); poking_init();
arch_cpu_finalize_init();
acpi_subsystem_init(); acpi_subsystem_init();
arch_post_acpi_subsys_init(); arch_post_acpi_subsys_init();
kcsan_init(); kcsan_init();