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/*
* KVM in-kernel APIC support
*
* Copyright (c) 2011 Siemens AG
*
* Authors:
* Jan Kiszka <jan.kiszka@siemens.com>
*
* This work is licensed under the terms of the GNU GPL version 2.
* See the COPYING file in the top-level directory.
*/
#include "hw/apic_internal.h"
#include "kvm.h"
static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic,
int reg_id, uint32_t val)
{
*((uint32_t *)(kapic->regs + (reg_id << 4))) = val;
}
static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic,
int reg_id)
{
return *((uint32_t *)(kapic->regs + (reg_id << 4)));
}
void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
{
APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
int i;
memset(kapic, 0, sizeof(kapic));
kvm_apic_set_reg(kapic, 0x2, s->id << 24);
kvm_apic_set_reg(kapic, 0x8, s->tpr);
kvm_apic_set_reg(kapic, 0xd, s->log_dest << 24);
kvm_apic_set_reg(kapic, 0xe, s->dest_mode << 28 | 0x0fffffff);
kvm_apic_set_reg(kapic, 0xf, s->spurious_vec);
for (i = 0; i < 8; i++) {
kvm_apic_set_reg(kapic, 0x10 + i, s->isr[i]);
kvm_apic_set_reg(kapic, 0x18 + i, s->tmr[i]);
kvm_apic_set_reg(kapic, 0x20 + i, s->irr[i]);
}
kvm_apic_set_reg(kapic, 0x28, s->esr);
kvm_apic_set_reg(kapic, 0x30, s->icr[0]);
kvm_apic_set_reg(kapic, 0x31, s->icr[1]);
for (i = 0; i < APIC_LVT_NB; i++) {
kvm_apic_set_reg(kapic, 0x32 + i, s->lvt[i]);
}
kvm_apic_set_reg(kapic, 0x38, s->initial_count);
kvm_apic_set_reg(kapic, 0x3e, s->divide_conf);
}
void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic)
{
APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
int i, v;
s->id = kvm_apic_get_reg(kapic, 0x2) >> 24;
s->tpr = kvm_apic_get_reg(kapic, 0x8);
s->arb_id = kvm_apic_get_reg(kapic, 0x9);
s->log_dest = kvm_apic_get_reg(kapic, 0xd) >> 24;
s->dest_mode = kvm_apic_get_reg(kapic, 0xe) >> 28;
s->spurious_vec = kvm_apic_get_reg(kapic, 0xf);
for (i = 0; i < 8; i++) {
s->isr[i] = kvm_apic_get_reg(kapic, 0x10 + i);
s->tmr[i] = kvm_apic_get_reg(kapic, 0x18 + i);
s->irr[i] = kvm_apic_get_reg(kapic, 0x20 + i);
}
s->esr = kvm_apic_get_reg(kapic, 0x28);
s->icr[0] = kvm_apic_get_reg(kapic, 0x30);
s->icr[1] = kvm_apic_get_reg(kapic, 0x31);
for (i = 0; i < APIC_LVT_NB; i++) {
s->lvt[i] = kvm_apic_get_reg(kapic, 0x32 + i);
}
s->initial_count = kvm_apic_get_reg(kapic, 0x38);
s->divide_conf = kvm_apic_get_reg(kapic, 0x3e);
v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);
s->count_shift = (v + 1) & 7;
s->initial_count_load_time = qemu_get_clock_ns(vm_clock);
apic_next_timer(s, s->initial_count_load_time);
}
static void kvm_apic_set_base(APICCommonState *s, uint64_t val)
{
s->apicbase = val;
}
static void kvm_apic_set_tpr(APICCommonState *s, uint8_t val)
{
s->tpr = (val & 0x0f) << 4;
}
static void do_inject_external_nmi(void *data)
{
APICCommonState *s = data;
CPUState *env = s->cpu_env;
uint32_t lvt;
int ret;
cpu_synchronize_state(env);
lvt = s->lvt[APIC_LVT_LINT1];
if (!(lvt & APIC_LVT_MASKED) && ((lvt >> 8) & 7) == APIC_DM_NMI) {
ret = kvm_vcpu_ioctl(env, KVM_NMI);
if (ret < 0) {
fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
strerror(-ret));
}
}
}
static void kvm_apic_external_nmi(APICCommonState *s)
{
run_on_cpu(s->cpu_env, do_inject_external_nmi, s);
}
static void kvm_apic_init(APICCommonState *s)
{
memory_region_init_reservation(&s->io_memory, "kvm-apic-msi",
MSI_SPACE_SIZE);
}
static APICCommonInfo kvm_apic_info = {
.busdev.qdev.name = "kvm-apic",
.init = kvm_apic_init,
.set_base = kvm_apic_set_base,
.set_tpr = kvm_apic_set_tpr,
.external_nmi = kvm_apic_external_nmi,
};
static void kvm_apic_register_device(void)
{
apic_qdev_register(&kvm_apic_info);
}
device_init(kvm_apic_register_device)
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