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011545b570
So fpu__ctx_switch_init() has two aspects: a once per bootup functionality that sets up a capability flag, and a per CPU functionality that sets CR0::TS. Split the function. Note that at this stage we still have duplicate calls into these methods, as both the _system() and the _cpu() methods are run on all CPUs, with lower level on_boot_cpu flags filtering out the duplicates where needed. So add TS flag clearing as well, to handle the aftermath of early CPU init sequences that might call in without having eager-fpu set - don't assume the TS flag is cleared. Calling each from its respective init level will happen later on. 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> |
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