cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dummychip.c (1367B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
      4 * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
      5 *
      6 * This file contains the dummy interrupt chip implementation
      7 */
      8#include <linux/interrupt.h>
      9#include <linux/irq.h>
     10#include <linux/export.h>
     11
     12#include "internals.h"
     13
     14/*
     15 * What should we do if we get a hw irq event on an illegal vector?
     16 * Each architecture has to answer this themselves.
     17 */
     18static void ack_bad(struct irq_data *data)
     19{
     20	struct irq_desc *desc = irq_data_to_desc(data);
     21
     22	print_irq_desc(data->irq, desc);
     23	ack_bad_irq(data->irq);
     24}
     25
     26/*
     27 * NOP functions
     28 */
     29static void noop(struct irq_data *data) { }
     30
     31static unsigned int noop_ret(struct irq_data *data)
     32{
     33	return 0;
     34}
     35
     36/*
     37 * Generic no controller implementation
     38 */
     39struct irq_chip no_irq_chip = {
     40	.name		= "none",
     41	.irq_startup	= noop_ret,
     42	.irq_shutdown	= noop,
     43	.irq_enable	= noop,
     44	.irq_disable	= noop,
     45	.irq_ack	= ack_bad,
     46	.flags		= IRQCHIP_SKIP_SET_WAKE,
     47};
     48
     49/*
     50 * Generic dummy implementation which can be used for
     51 * real dumb interrupt sources
     52 */
     53struct irq_chip dummy_irq_chip = {
     54	.name		= "dummy",
     55	.irq_startup	= noop_ret,
     56	.irq_shutdown	= noop,
     57	.irq_enable	= noop,
     58	.irq_disable	= noop,
     59	.irq_ack	= noop,
     60	.irq_mask	= noop,
     61	.irq_unmask	= noop,
     62	.flags		= IRQCHIP_SKIP_SET_WAKE,
     63};
     64EXPORT_SYMBOL_GPL(dummy_irq_chip);