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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* LoongArch kvm pch pic interrupt support
*
* Copyright (C) 2025 Loongson Technology Corporation Limited
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/boards.h"
#include "hw/intc/loongarch_pch_pic.h"
#include "hw/loongarch/virt.h"
#include "hw/pci-host/ls7a.h"
#include "system/kvm.h"
static void kvm_pch_pic_access_reg(int fd, uint64_t addr, void *val, bool write)
{
kvm_device_access(fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_REGS,
addr, val, write, &error_abort);
}
static void kvm_pch_pic_access(void *opaque, bool write)
{
LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
LoongarchPICState *lps = LOONGARCH_PIC(opaque);
int fd = lps->dev_fd;
int addr, offset;
if (fd == 0) {
return;
}
kvm_pch_pic_access_reg(fd, PCH_PIC_INT_MASK, &s->int_mask, write);
kvm_pch_pic_access_reg(fd, PCH_PIC_HTMSI_EN, &s->htmsi_en, write);
kvm_pch_pic_access_reg(fd, PCH_PIC_INT_EDGE, &s->intedge, write);
kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL0, &s->auto_crtl0, write);
kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL1, &s->auto_crtl1, write);
for (addr = PCH_PIC_ROUTE_ENTRY;
addr < PCH_PIC_ROUTE_ENTRY_END; addr++) {
offset = addr - PCH_PIC_ROUTE_ENTRY;
kvm_pch_pic_access_reg(fd, addr, &s->route_entry[offset], write);
}
for (addr = PCH_PIC_HTMSI_VEC; addr < PCH_PIC_HTMSI_VEC_END; addr++) {
offset = addr - PCH_PIC_HTMSI_VEC;
kvm_pch_pic_access_reg(fd, addr, &s->htmsi_vector[offset], write);
}
kvm_pch_pic_access_reg(fd, PCH_PIC_INT_REQUEST, &s->intirr, write);
kvm_pch_pic_access_reg(fd, PCH_PIC_INT_STATUS, &s->intisr, write);
kvm_pch_pic_access_reg(fd, PCH_PIC_INT_POL, &s->int_polarity, write);
}
int kvm_pic_get(void *opaque)
{
kvm_pch_pic_access(opaque, false);
return 0;
}
int kvm_pic_put(void *opaque, int version_id)
{
kvm_pch_pic_access(opaque, true);
return 0;
}
void kvm_pic_realize(DeviceState *dev, Error **errp)
{
LoongarchPICState *lps = LOONGARCH_PIC(dev);
uint64_t pch_pic_base = VIRT_PCH_REG_BASE;
int ret;
ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false);
if (ret < 0) {
fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n",
strerror(-ret));
abort();
}
lps->dev_fd = ret;
ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL,
KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT,
&pch_pic_base, true, NULL);
if (ret < 0) {
fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n",
strerror(-ret));
abort();
}
}
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