hw/intc/kvm_irqcount.c

   1 /*
   2  * KVM PIC functions for counting the delivered IRQs.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  16  */
  17
  18 #include "qemu/osdep.h"
  19 #include "hw/intc/kvm_irqcount.h"
  20 #include "trace.h"
  21
  22 static int kvm_irq_delivered;
  23
  24 void kvm_report_irq_delivered(int delivered)
  25 {
  26     kvm_irq_delivered += delivered;
  27
  28     trace_kvm_report_irq_delivered(kvm_irq_delivered);
  29 }
  30
  31 void kvm_reset_irq_delivered(void)
  32 {
  33     /*
  34      * Copy this into a local variable to encourage gcc to emit a plain
  35      * register for a sys/sdt.h marker.  For details on this workaround, see:
  36      * https://sourceware.org/bugzilla/show_bug.cgi?id=13296
  37      */
  38     volatile int k_i_d = kvm_irq_delivered;
  39     trace_kvm_reset_irq_delivered(k_i_d);
  40
  41     kvm_irq_delivered = 0;
  42 }
  43
  44 int kvm_get_irq_delivered(void)
  45 {
  46     trace_kvm_get_irq_delivered(kvm_irq_delivered);
  47
  48     return kvm_irq_delivered;
  49 }