cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

interrupt.c (1415B)

      1/*
      2 * This file is subject to the terms and conditions of the GNU General Public
      3 * License.  See the file "COPYING" in the main directory of this archive
      4 * for more details.
      5 *
      6 * KVM/MIPS: Interrupt delivery
      7 *
      8 * Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
      9 * Authors: Sanjay Lal <sanjayl@kymasys.com>
     10 */
     11
     12#include <linux/errno.h>
     13#include <linux/err.h>
     14#include <linux/vmalloc.h>
     15#include <linux/fs.h>
     16#include <linux/memblock.h>
     17#include <asm/page.h>
     18#include <asm/cacheflush.h>
     19
     20#include <linux/kvm_host.h>
     21
     22#include "interrupt.h"
     23
     24void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, u32 cause)
     25{
     26	unsigned long *pending = &vcpu->arch.pending_exceptions;
     27	unsigned long *pending_clr = &vcpu->arch.pending_exceptions_clr;
     28	unsigned int priority;
     29
     30	if (!(*pending) && !(*pending_clr))
     31		return;
     32
     33	priority = __ffs(*pending_clr);
     34	while (priority <= MIPS_EXC_MAX) {
     35		kvm_mips_callbacks->irq_clear(vcpu, priority, cause);
     36
     37		priority = find_next_bit(pending_clr,
     38					 BITS_PER_BYTE * sizeof(*pending_clr),
     39					 priority + 1);
     40	}
     41
     42	priority = __ffs(*pending);
     43	while (priority <= MIPS_EXC_MAX) {
     44		kvm_mips_callbacks->irq_deliver(vcpu, priority, cause);
     45
     46		priority = find_next_bit(pending,
     47					 BITS_PER_BYTE * sizeof(*pending),
     48					 priority + 1);
     49	}
     50
     51}
     52
     53int kvm_mips_pending_timer(struct kvm_vcpu *vcpu)
     54{
     55	return test_bit(MIPS_EXC_INT_TIMER, &vcpu->arch.pending_exceptions);
     56}