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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irq_lsapic.c (1025B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * LSAPIC Interrupt Controller
      4 *
      5 * This takes care of interrupts that are generated by the CPU's
      6 * internal Streamlined Advanced Programmable Interrupt Controller
      7 * (LSAPIC), such as the ITC and IPI interrupts.
      8    *
      9 * Copyright (C) 1999 VA Linux Systems
     10 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
     11 * Copyright (C) 2000 Hewlett-Packard Co
     12 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
     13 */
     14
     15#include <linux/sched.h>
     16#include <linux/irq.h>
     17
     18static unsigned int
     19lsapic_noop_startup (struct irq_data *data)
     20{
     21	return 0;
     22}
     23
     24static void
     25lsapic_noop (struct irq_data *data)
     26{
     27	/* nothing to do... */
     28}
     29
     30static int lsapic_retrigger(struct irq_data *data)
     31{
     32	ia64_resend_irq(data->irq);
     33
     34	return 1;
     35}
     36
     37struct irq_chip irq_type_ia64_lsapic = {
     38	.name =			"LSAPIC",
     39	.irq_startup =		lsapic_noop_startup,
     40	.irq_shutdown =		lsapic_noop,
     41	.irq_enable =		lsapic_noop,
     42	.irq_disable =		lsapic_noop,
     43	.irq_ack =		lsapic_noop,
     44	.irq_retrigger =	lsapic_retrigger,
     45};