diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-02-25 23:16:30 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-05-05 11:28:02 +0200 |
| commit | 3dc77ca13cffe05e0a72793d138a555d2fe1d8bf (patch) | |
| tree | 8a9020e5afa070cdaf48c334973d9f874ec91190 /arch/x86/include/asm/idtentry.h | |
| parent | b2a0ada9b963a8e533e42281c80f052ff3ee607c (diff) | |
x86/entry/32: Convert IRET exception to IDTENTRY_SWentry-v4-part3
Convert the IRET exception handler to IDTENTRY_SW. This is slightly
different than the conversions of hardware exceptions as the IRET exception
is invoked via an exception table when IRET faults. So it just uses the
IDTENTRY_SW mechanism for consistency. It does not emit ASM code as it does
not fit the other idtentry exceptions.
- Implement the C entry point with DEFINE_IDTENTRY_SW() which maps to
DEFINE_IDTENTRY()
- Fixup the XEN/PV code
- Remove the old prototyoes
- Remove the RCU warning as the new entry macro ensures correctness
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/idtentry.h')
| -rw-r--r-- | arch/x86/include/asm/idtentry.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h index 59ae0c6308fe..a2d334152b91 100644 --- a/arch/x86/include/asm/idtentry.h +++ b/arch/x86/include/asm/idtentry.h @@ -57,6 +57,10 @@ __visible noinstr void func(struct pt_regs *regs) \ \ static __always_inline void __##func(struct pt_regs *regs) +/* Special case for 32bit IRET 'trap' */ +#define DECLARE_IDTENTRY_SW DECLARE_IDTENTRY +#define DEFINE_IDTENTRY_SW DEFINE_IDTENTRY + /** * DECLARE_IDTENTRY_ERRORCODE - Declare functions for simple IDT entry points * Error code pushed by hardware @@ -111,6 +115,9 @@ static __always_inline void __##func(struct pt_regs *regs, \ #define DECLARE_IDTENTRY_ERRORCODE(vector, func) \ idtentry vector asm_##func func has_error_code=1 sane=1 +/* Special case for 32bit IRET 'trap'. Do not emit ASM code */ +#define DECLARE_IDTENTRY_SW(vector, func) + #endif /* __ASSEMBLY__ */ /* @@ -133,6 +140,9 @@ DECLARE_IDTENTRY(X86_TRAP_SPURIOUS, exc_spurious_interrupt_bug); DECLARE_IDTENTRY(X86_TRAP_MF, exc_coprocessor_error); DECLARE_IDTENTRY(X86_TRAP_XF, exc_simd_coprocessor_error); +/* 32bit software IRET trap. Do not emit ASM code */ +DECLARE_IDTENTRY_SW(X86_TRAP_IRET, exc_iret_error); + /* Simple exception entries with error code pushed by hardware */ DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_TS, exc_invalid_tss); DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_NP, exc_segment_not_present); |