633260fa14
Device interrupts which go through do_IRQ() or the spurious interrupt handler have their separate entry code on 64 bit for no good reason. Both 32 and 64 bit transport the vector number through ORIG_[RE]AX in pt_regs. Further the vector number is forced to fit into an u8 and is complemented and offset by 0x80 so it's in the signed character range. Otherwise GAS would expand the pushq to a 5 byte instruction for any vector > 0x7F. Treat the vector number like an error code and hand it to the C function as argument. This allows to get rid of the extra entry code in a later step. Simplify the error code push magic by implementing the pushq imm8 via a '.byte 0x6a, vector' sequence so GAS is not able to screw it up. As the pushq imm8 is sign extending the resulting error code needs to be truncated to 8 bits in C code. Originally-by: Andy Lutomirski <luto@kernel.org> 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/20200521202118.796915981@linutronix.de
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* This file is designed to contain the BUILD_INTERRUPT specifications for
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* all of the extra named interrupt vectors used by the architecture.
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* Usually this is the Inter Process Interrupts (IPIs)
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*/
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/*
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* The following vectors are part of the Linux architecture, there
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* is no hardware IRQ pin equivalent for them, they are triggered
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* through the ICC by us (IPIs)
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*/
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#ifdef CONFIG_SMP
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BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR)
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BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR)
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BUILD_INTERRUPT(call_function_single_interrupt,CALL_FUNCTION_SINGLE_VECTOR)
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BUILD_INTERRUPT(irq_move_cleanup_interrupt, IRQ_MOVE_CLEANUP_VECTOR)
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BUILD_INTERRUPT(reboot_interrupt, REBOOT_VECTOR)
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#endif
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#ifdef CONFIG_HAVE_KVM
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BUILD_INTERRUPT(kvm_posted_intr_ipi, POSTED_INTR_VECTOR)
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BUILD_INTERRUPT(kvm_posted_intr_wakeup_ipi, POSTED_INTR_WAKEUP_VECTOR)
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BUILD_INTERRUPT(kvm_posted_intr_nested_ipi, POSTED_INTR_NESTED_VECTOR)
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#endif
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/*
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* every pentium local APIC has two 'local interrupts', with a
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* soft-definable vector attached to both interrupts, one of
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* which is a timer interrupt, the other one is error counter
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* overflow. Linux uses the local APIC timer interrupt to get
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* a much simpler SMP time architecture:
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*/
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#ifdef CONFIG_X86_LOCAL_APIC
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BUILD_INTERRUPT(apic_timer_interrupt,LOCAL_TIMER_VECTOR)
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BUILD_INTERRUPT(error_interrupt,ERROR_APIC_VECTOR)
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BUILD_INTERRUPT(spurious_apic_interrupt,SPURIOUS_APIC_VECTOR)
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BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR)
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#ifdef CONFIG_IRQ_WORK
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BUILD_INTERRUPT(irq_work_interrupt, IRQ_WORK_VECTOR)
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#endif
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#ifdef CONFIG_X86_THERMAL_VECTOR
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BUILD_INTERRUPT(thermal_interrupt,THERMAL_APIC_VECTOR)
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#endif
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#ifdef CONFIG_X86_MCE_THRESHOLD
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BUILD_INTERRUPT(threshold_interrupt,THRESHOLD_APIC_VECTOR)
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#endif
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#ifdef CONFIG_X86_MCE_AMD
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BUILD_INTERRUPT(deferred_error_interrupt, DEFERRED_ERROR_VECTOR)
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#endif
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#endif
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