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x86/entry: Convert Coprocessor error exception to IDTENTRY

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Convert #MF to IDTENTRY_ERRORCODE:
  - Implement the C entry point with DEFINE_IDTENTRY
  - Emit the ASM stub with DECLARE_IDTENTRY
  - Remove the ASM idtentry in 64bit
  - Remove the open coded ASM entry code in 32bit
  - Fixup the XEN/PV code
  - Remove the old prototypes
  - Remove the RCU warning as the new entry macro ensures correctness

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505134905.838823510@linutronix.de
This commit is contained in:
Thomas Gleixner
2020-02-25 23:16:27 +01:00
parent dad7106f81
commit 14a8bd2aa7
8 changed files with 6 additions and 17 deletions
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5
arch/x86/kernel/traps.c
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@@ -854,10 +854,9 @@ exit:
cond_local_irq_disable(regs);
}
dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
DEFINE_IDTENTRY(exc_coprocessor_error)
{
RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU");
math_error(regs, error_code, X86_TRAP_MF);
math_error(regs, 0, X86_TRAP_MF);
}
dotraplinkage void