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