The FPU context switch type (lazy or eager) setup code is split into
two places currently - move it all to eager_fpu_init().
Note that the code we move will now be executed on non-xstate CPUs
as well, but this should be safe: both xfeatures_mask and
cpu_has_xsaveopt is 0 there.
Reviewed-by: Borislav Petkov <b...@alien8.de>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Fenghua Yu <fenghua...@intel.com>
Cc: H. Peter Anvin <h...@zytor.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Signed-off-by: Ingo Molnar <mi...@kernel.org>
---
arch/x86/kernel/fpu/xsave.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/arch/x86/kernel/fpu/xsave.c b/arch/x86/kernel/fpu/xsave.c
index 097f03e209a6..1b920a170576 100644
--- a/arch/x86/kernel/fpu/xsave.c
+++ b/arch/x86/kernel/fpu/xsave.c
@@ -686,20 +686,6 @@ void fpu__init_system_xstate(void)
prepare_fx_sw_frame();
setup_init_fpu_buf();
- /* Auto enable eagerfpu for xsaveopt */
- if (cpu_has_xsaveopt && eagerfpu != DISABLE)
- eagerfpu = ENABLE;
-
- if (xfeatures_mask & XSTATE_EAGER) {
- if (eagerfpu == DISABLE) {
- pr_err("x86/fpu: eagerfpu switching disabled, disabling
the following xstate features: 0x%llx.\n",
- xfeatures_mask & XSTATE_EAGER);
- xfeatures_mask &= ~XSTATE_EAGER;
- } else {
- eagerfpu = ENABLE;
- }
- }
-
pr_info("x86/fpu: Enabled xstate features 0x%llx, context size is 0x%x
bytes, using '%s' format.\n",
xfeatures_mask,
xstate_size,
@@ -715,6 +701,20 @@ void __init_refok eager_fpu_init(void)
WARN_ON(current->thread.fpu.fpstate_active);
current_thread_info()->status = 0;
+ /* Auto enable eagerfpu for xsaveopt */
+ if (cpu_has_xsaveopt && eagerfpu != DISABLE)
+ eagerfpu = ENABLE;
+
+ if (xfeatures_mask & XSTATE_EAGER) {
+ if (eagerfpu == DISABLE) {
+ pr_err("x86/fpu: eagerfpu switching disabled, disabling
the following xstate features: 0x%llx.\n",
+ xfeatures_mask & XSTATE_EAGER);
+ xfeatures_mask &= ~XSTATE_EAGER;
+ } else {
+ eagerfpu = ENABLE;
+ }
+ }
+
if (eagerfpu == ENABLE)
setup_force_cpu_cap(X86_FEATURE_EAGER_FPU);
--
2.1.0
--
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