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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-05-21 22:05:51 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:15:19 +0200 |
| commit | 3ffdfdcec1bae39b68b990762350b3cd3127f23f (patch) | |
| tree | 5e2299a9ede923494e862cb1c2d19470d0138f6b /arch/x86/entry/entry_64.S | |
| parent | x86/entry/64: Remove TRACE_IRQS_*_DEBUG (diff) | |
| download | linux-3ffdfdcec1bae39b68b990762350b3cd3127f23f.tar.xz linux-3ffdfdcec1bae39b68b990762350b3cd3127f23f.zip | |
x86/entry: Move paranoid irq tracing out of ASM code
The last step to remove the irq tracing cruft from ASM. Ignore #DF as the
maschine is going to die anyway.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20200521202120.414043330@linutronix.de
Diffstat (limited to 'arch/x86/entry/entry_64.S')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 13 |
1 files changed, 0 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 |