Commit-ID: 997578b14c2730226a804d53ce681d3506f2f876
Gitweb: http://git.kernel.org/tip/997578b14c2730226a804d53ce681d3506f2f876
Author: Ingo Molnar <mingo@xxxxxxxxxx>
AuthorDate: Sun, 26 Apr 2015 10:35:57 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 19 May 2015 15:47:43 +0200
x86/fpu: Move the fpstate_xstate_init_size() call into fpu__init_system()
The fpstate_xstate_init_size() function sets up a basic xstate_size, called
during fpu__detect() currently.
Its real dependency is to be called before fpu__init_system_xstate().
So move the function call site into fpu__init_system(), to right before the
fpu__init_system_xstate() call.
Also add a once-per-boot flag to fpstate_xstate_init_size(), we'll remove
this quirk later once we've cleaned up the init dependencies.
This moves the two related functions closer to each other and makes them
both part of the _init_system() functionality.
Currently we do the fpstate_xstate_init_size()
Reviewed-by: Borislav Petkov <bp@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/fpu/init.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/fpu/init.c b/arch/x86/kernel/fpu/init.c
index 567e7e6..ca3468d 100644
--- a/arch/x86/kernel/fpu/init.c
+++ b/arch/x86/kernel/fpu/init.c
@@ -96,6 +96,12 @@ static void mxcsr_feature_mask_init(void)
static void fpstate_xstate_init_size(void)
{
+ static bool on_boot_cpu = 1;
+
+ if (!on_boot_cpu)
+ return;
+ on_boot_cpu = 0;
+
/*
* Note that xstate_size might be overwriten later during
* fpu__init_system_xstate().
@@ -227,7 +233,10 @@ void fpu__init_system(void)
fx_finit(&init_xstate_ctx.i387);
mxcsr_feature_mask_init();
+
+ fpstate_xstate_init_size();
fpu__init_system_xstate();
+
fpu__init_system_ctx_switch();
fpu__init_cpu_ctx_switch();
}
@@ -270,6 +279,4 @@ void fpu__detect(struct cpuinfo_x86 *c)
clear_cpu_cap(c, X86_FEATURE_FPU);
/* The final cr0 value is set later, in fpu_init() */
-
- fpstate_xstate_init_size();
}
--
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