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/*
* Copyright (c) 2003-2004 Fabrice Bellard
* Copyright (c) 2019, 2024 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "system/whpx.h"
#include "system/cpu-timers.h"
#include "trace.h"
#include "hw/i386/x86.h"
#include "target/i386/cpu.h"
#include "hw/intc/i8259.h"
#include "hw/irq.h"
#include "system/kvm.h"
/* TSC handling */
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpus_get_elapsed_ticks();
}
/* IRQ handling */
static void pic_irq_request(void *opaque, int irq, int level)
{
CPUState *cs = first_cpu;
X86CPU *cpu = X86_CPU(cs);
trace_x86_pic_interrupt(irq, level);
if (cpu_is_apic_enabled(cpu->apic_state) && !kvm_irqchip_in_kernel() &&
!whpx_apic_in_platform()) {
CPU_FOREACH(cs) {
cpu = X86_CPU(cs);
if (apic_accept_pic_intr(cpu->apic_state)) {
apic_deliver_pic_intr(cpu->apic_state, level);
}
}
} else {
if (level) {
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
} else {
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
}
}
}
qemu_irq x86_allocate_cpu_irq(void)
{
return qemu_allocate_irq(pic_irq_request, NULL, 0);
}
int cpu_get_pic_interrupt(CPUX86State *env)
{
X86CPU *cpu = env_archcpu(env);
int intno;
if (!kvm_irqchip_in_kernel() && !whpx_apic_in_platform()) {
intno = apic_get_interrupt(cpu->apic_state);
if (intno >= 0) {
return intno;
}
/* read the irq from the PIC */
if (!apic_accept_pic_intr(cpu->apic_state)) {
return -1;
}
}
intno = pic_read_irq(isa_pic);
return intno;
}
DeviceState *cpu_get_current_apic(void)
{
if (current_cpu) {
X86CPU *cpu = X86_CPU(current_cpu);
return cpu->apic_state;
} else {
return NULL;
}
}
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