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x86/entry: Convert Spurious interrupt bug exception to IDTENTRY

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Convert #SPURIOUS 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

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/20200505134905.728077036@linutronix.de
This commit is contained in:
Thomas Gleixner 2020-02-25 23:16:26 +01:00
parent be4c11afbb
commit dad7106f81
8 changed files with 5 additions and 16 deletions
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7
arch/x86/entry/entry_32.S
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@ -1333,13 +1333,6 @@ SYM_CODE_START(machine_check)
SYM_CODE_END(machine_check)
#endif
SYM_CODE_START(spurious_interrupt_bug)
ASM_CLAC
pushl $0
pushl $do_spurious_interrupt_bug
jmp common_exception
SYM_CODE_END(spurious_interrupt_bug)
#ifdef CONFIG_XEN_PV
SYM_FUNC_START(xen_hypervisor_callback)
/*

1
arch/x86/entry/entry_64.S
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@ -1073,7 +1073,6 @@ apicinterrupt IRQ_WORK_VECTOR irq_work_interrupt smp_irq_work_interrupt
*/
idtentry X86_TRAP_BP int3 do_int3 has_error_code=0
idtentry X86_TRAP_SPURIOUS spurious_interrupt_bug do_spurious_interrupt_bug has_error_code=0
idtentry X86_TRAP_MF coprocessor_error do_coprocessor_error has_error_code=0
idtentry X86_TRAP_AC alignment_check do_alignment_check has_error_code=1
idtentry X86_TRAP_XF simd_coprocessor_error do_simd_coprocessor_error has_error_code=0

1
arch/x86/include/asm/idtentry.h
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@ -129,6 +129,7 @@ DECLARE_IDTENTRY(X86_TRAP_BR, exc_bounds);
DECLARE_IDTENTRY(X86_TRAP_UD, exc_invalid_op);
DECLARE_IDTENTRY(X86_TRAP_NM, exc_device_not_available);
DECLARE_IDTENTRY(X86_TRAP_OLD_MF, exc_coproc_segment_overrun);
DECLARE_IDTENTRY(X86_TRAP_SPURIOUS, exc_spurious_interrupt_bug);
/* Simple exception entries with error code pushed by hardware */
DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_TS, exc_invalid_tss);

3
arch/x86/include/asm/traps.h
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@ -19,7 +19,6 @@ asmlinkage void double_fault(void);
#endif
asmlinkage void page_fault(void);
asmlinkage void async_page_fault(void);
asmlinkage void spurious_interrupt_bug(void);
asmlinkage void coprocessor_error(void);
asmlinkage void alignment_check(void);
#ifdef CONFIG_X86_MCE
@ -33,7 +32,6 @@ asmlinkage void xen_xendebug(void);
asmlinkage void xen_int3(void);
asmlinkage void xen_double_fault(void);
asmlinkage void xen_page_fault(void);
asmlinkage void xen_spurious_interrupt_bug(void);
asmlinkage void xen_coprocessor_error(void);
asmlinkage void xen_alignment_check(void);
#ifdef CONFIG_X86_MCE
@ -47,7 +45,6 @@ dotraplinkage void do_nmi(struct pt_regs *regs, long error_code);
dotraplinkage void do_int3(struct pt_regs *regs, long error_code);
dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code, unsigned long cr2);
dotraplinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, unsigned long address);
dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code);
dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code);
dotraplinkage void do_alignment_check(struct pt_regs *regs, long error_code);
dotraplinkage void do_simd_coprocessor_error(struct pt_regs *regs, long error_code);

2
arch/x86/kernel/idt.c
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@ -83,7 +83,7 @@ static const __initconst struct idt_data def_idts[] = {
INTG(X86_TRAP_NP, asm_exc_segment_not_present),
INTG(X86_TRAP_SS, asm_exc_stack_segment),
INTG(X86_TRAP_GP, asm_exc_general_protection),
INTG(X86_TRAP_SPURIOUS, spurious_interrupt_bug),
INTG(X86_TRAP_SPURIOUS, asm_exc_spurious_interrupt_bug),
INTG(X86_TRAP_MF, coprocessor_error),
INTG(X86_TRAP_AC, alignment_check),
INTG(X86_TRAP_XF, simd_coprocessor_error),

3
arch/x86/kernel/traps.c
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@ -867,8 +867,7 @@ do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
math_error(regs, error_code, X86_TRAP_XF);
}
dotraplinkage void
do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
DEFINE_IDTENTRY(exc_spurious_interrupt_bug)
{
/*
* This addresses a Pentium Pro Erratum:

2
arch/x86/xen/enlighten_pv.c
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@ -631,7 +631,7 @@ static struct trap_array_entry trap_array[] = {
TRAP_ENTRY(exc_segment_not_present, false ),
TRAP_ENTRY(exc_stack_segment, false ),
TRAP_ENTRY(exc_general_protection, false ),
{ spurious_interrupt_bug, xen_spurious_interrupt_bug, false },
TRAP_ENTRY(exc_spurious_interrupt_bug, false ),
{ coprocessor_error, xen_coprocessor_error, false },
{ alignment_check, xen_alignment_check, false },
{ simd_coprocessor_error, xen_simd_coprocessor_error, false },

2
arch/x86/xen/xen-asm_64.S
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@ -44,7 +44,7 @@ xen_pv_trap asm_exc_segment_not_present
xen_pv_trap asm_exc_stack_segment
xen_pv_trap asm_exc_general_protection
xen_pv_trap page_fault
xen_pv_trap spurious_interrupt_bug
xen_pv_trap asm_exc_spurious_interrupt_bug
xen_pv_trap coprocessor_error
xen_pv_trap alignment_check
#ifdef CONFIG_X86_MCE