public-mirrors/linux
1
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-05-24 10:39:52 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

x86/fpu: Configure init_fpstate attributes orderly

Browse source 
The init_fpstate setup code is spread out and out of order. The init image
is recorded before its scoped features and the buffer size are determined.

Determine the scope of init_fpstate components and its size before
recording the init state. Also move the relevant code together.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: neelnatu@google.com
Link: https://lore.kernel.org/r/20220824191223.1248-2-chang.seok.bae@intel.com
This commit is contained in:
Chang S. Bae 2022-08-24 12:12:21 -07:00 • committed by Thomas Gleixner
parent 9abf2313ad
commit c32d7cab57
2 changed files with 5 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
arch/x86/kernel/fpu/init.c
View file

@ -210,13 +210,6 @@ static void __init fpu__init_system_xstate_size_legacy(void)
fpstate_reset(&current->thread.fpu);
}
static void __init fpu__init_init_fpstate(void)
{
/* Bring init_fpstate size and features up to date */
init_fpstate.size = fpu_kernel_cfg.max_size;
init_fpstate.xfeatures = fpu_kernel_cfg.max_features;
}
/*
* Called on the boot CPU once per system bootup, to set up the initial
* FPU state that is later cloned into all processes:
@ -236,5 +229,4 @@ void __init fpu__init_system(struct cpuinfo_x86 *c)
fpu__init_system_xstate_size_legacy();
fpu__init_system_xstate(fpu_kernel_cfg.max_size);
fpu__init_task_struct_size();
fpu__init_init_fpstate();
}

6
arch/x86/kernel/fpu/xstate.c
View file

@ -360,7 +360,7 @@ static void __init setup_init_fpu_buf(void)
print_xstate_features();
xstate_init_xcomp_bv(&init_fpstate.regs.xsave, fpu_kernel_cfg.max_features);
xstate_init_xcomp_bv(&init_fpstate.regs.xsave, init_fpstate.xfeatures);
/*
* Init all the features state with header.xfeatures being 0x0
@ -875,6 +875,10 @@ void __init fpu__init_system_xstate(unsigned int legacy_size)
update_regset_xstate_info(fpu_user_cfg.max_size,
fpu_user_cfg.max_features);
/* Bring init_fpstate size and features up to date */
init_fpstate.size = fpu_kernel_cfg.max_size;
init_fpstate.xfeatures = fpu_kernel_cfg.max_features;
setup_init_fpu_buf();
/*