diff options
| -rw-r--r-- | arch/x86/entry/entry_64.S | 13 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/mce/core.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/nmi.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/traps.c | 11 |
4 files changed, 17 insertions, 13 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index fb7f12628346..2566554fe04e 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -16,7 +16,6 @@ * * Some macro usage: * - SYM_FUNC_START/END:Define functions in the symbol table. - * - TRACE_IRQ_*: Trace hardirq state for lock debugging. * - idtentry: Define exception entry points. */ #include <linux/linkage.h> @@ -107,11 +106,6 @@ SYM_CODE_END(native_usergs_sysret64) SYM_CODE_START(entry_SYSCALL_64) UNWIND_HINT_EMPTY - /* - * Interrupts are off on entry. - * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, - * it is too small to ever cause noticeable irq latency. - */ swapgs /* tss.sp2 is scratch space. */ @@ -462,8 +456,6 @@ SYM_CODE_START(\asmsym) UNWIND_HINT_REGS - TRACE_IRQS_OFF - movq %rsp, %rdi /* pt_regs pointer */ .if \vector == X86_TRAP_DB @@ -881,17 +873,13 @@ SYM_CODE_END(paranoid_entry) */ SYM_CODE_START_LOCAL(paranoid_exit) UNWIND_HINT_REGS - DISABLE_INTERRUPTS(CLBR_ANY) - TRACE_IRQS_OFF testl %ebx, %ebx /* swapgs needed? */ jnz .Lparanoid_exit_no_swapgs - TRACE_IRQS_IRETQ /* Always restore stashed CR3 value (see paranoid_entry) */ RESTORE_CR3 scratch_reg=%rbx save_reg=%r14 SWAPGS_UNSAFE_STACK jmp restore_regs_and_return_to_kernel .Lparanoid_exit_no_swapgs: - TRACE_IRQS_IRETQ /* Always restore stashed CR3 value (see paranoid_entry) */ RESTORE_CR3 scratch_reg=%rbx save_reg=%r14 jmp restore_regs_and_return_to_kernel @@ -1292,7 +1280,6 @@ end_repeat_nmi: call paranoid_entry UNWIND_HINT_REGS - /* paranoidentry exc_nmi(), 0; without TRACE_IRQS_OFF */ movq %rsp, %rdi movq $-1, %rsi call exc_nmi diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index c47f004f6231..068e6cab1286 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -1922,7 +1922,10 @@ static __always_inline void exc_machine_check_kernel(struct pt_regs *regs) * that out because it's an indirect call. Annotate it. */ instrumentation_begin(); + trace_hardirqs_off_prepare(); machine_check_vector(regs); + if (regs->flags & X86_EFLAGS_IF) + trace_hardirqs_on_prepare(); instrumentation_end(); nmi_exit(); } diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c index 3052c78f03aa..5df4e7f58369 100644 --- a/arch/x86/kernel/nmi.c +++ b/arch/x86/kernel/nmi.c @@ -330,6 +330,7 @@ static noinstr void default_do_nmi(struct pt_regs *regs) __this_cpu_write(last_nmi_rip, regs->ip); instrumentation_begin(); + trace_hardirqs_off_prepare(); handled = nmi_handle(NMI_LOCAL, regs); __this_cpu_add(nmi_stats.normal, handled); @@ -416,6 +417,8 @@ static noinstr void default_do_nmi(struct pt_regs *regs) unknown_nmi_error(reason, regs); out: + if (regs->flags & X86_EFLAGS_IF) + trace_hardirqs_on_prepare(); instrumentation_end(); } diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index f28be3e51cca..50fb9cd5be97 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -634,8 +634,11 @@ DEFINE_IDTENTRY_RAW(exc_int3) } else { nmi_enter(); instrumentation_begin(); + trace_hardirqs_off_prepare(); if (!do_int3(regs)) die("int3", regs, 0); + if (regs->flags & X86_EFLAGS_IF) + trace_hardirqs_on_prepare(); instrumentation_end(); nmi_exit(); } @@ -850,6 +853,10 @@ static __always_inline void exc_debug_kernel(struct pt_regs *regs, unsigned long dr6) { nmi_enter(); + instrumentation_begin(); + trace_hardirqs_off_prepare(); + instrumentation_end(); + /* * The SDM says "The processor clears the BTF flag when it * generates a debug exception." Clear TIF_BLOCKSTEP to keep @@ -871,6 +878,10 @@ static __always_inline void exc_debug_kernel(struct pt_regs *regs, if (dr6) handle_debug(regs, dr6, false); + instrumentation_begin(); + if (regs->flags & X86_EFLAGS_IF) + trace_hardirqs_on_prepare(); + instrumentation_end(); nmi_exit(); } |