UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

x86/fpu: Move legacy check to fpu__init_system_xstate() 

Now that legacy code can execute fpu__init_cpu_xstate() in
xsave_init(), we can move the once per boot legacy check into
fpu__init_system_xstate(), where it belongs.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2015-04-25 06:47:24 +02:00
parent e84611fc96
commit e9dbfd673a
1 changed files with 5 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/x86/kernel/fpu/xsave.c
View File

@ -653,6 +653,11 @@ void fpu__init_system_xstate(void)
{
unsigned int eax, ebx, ecx, edx;
if (!cpu_has_xsave) {
pr_info("x86/fpu: Legacy x87 FPU detected.\n");
return;
}
if (boot_cpu_data.cpuid_level < XSTATE_CPUID) {
WARN(1, "x86/fpu: XSTATE_CPUID missing!\n");
return;
@ -711,14 +716,6 @@ void xsave_init(void)
{
static char on_boot_cpu = 1;
if (!cpu_has_xsave) {
if (on_boot_cpu) {
on_boot_cpu = 0;
pr_info("x86/fpu: Legacy x87 FPU detected.\n");
}
return;
}
if (on_boot_cpu) {
on_boot_cpu = 0;
fpu__init_system_xstate();