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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* LoongArch IPI interrupt KVM support
*
* Copyright (C) 2025 Loongson Technology Corporation Limited
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/intc/loongarch_ipi.h"
#include "system/kvm.h"
#include "target/loongarch/cpu.h"
static void kvm_ipi_access_reg(int fd, uint64_t addr, uint32_t *val, bool write)
{
kvm_device_access(fd, KVM_DEV_LOONGARCH_IPI_GRP_REGS,
addr, val, write, &error_abort);
}
static void kvm_ipi_access_regs(void *opaque, bool write)
{
LoongsonIPICommonState *ipi = (LoongsonIPICommonState *)opaque;
LoongarchIPIState *lis = LOONGARCH_IPI(opaque);
IPICore *core;
uint64_t attr;
int i, cpu_index, fd = lis->dev_fd;
if (fd == 0) {
return;
}
for (i = 0; i < ipi->num_cpu; i++) {
core = &ipi->cpu[i];
if (core->cpu == NULL) {
continue;
}
cpu_index = i;
attr = (cpu_index << 16) | CORE_STATUS_OFF;
kvm_ipi_access_reg(fd, attr, &core->status, write);
attr = (cpu_index << 16) | CORE_EN_OFF;
kvm_ipi_access_reg(fd, attr, &core->en, write);
attr = (cpu_index << 16) | CORE_SET_OFF;
kvm_ipi_access_reg(fd, attr, &core->set, write);
attr = (cpu_index << 16) | CORE_CLEAR_OFF;
kvm_ipi_access_reg(fd, attr, &core->clear, write);
attr = (cpu_index << 16) | CORE_BUF_20;
kvm_ipi_access_reg(fd, attr, &core->buf[0], write);
attr = (cpu_index << 16) | CORE_BUF_28;
kvm_ipi_access_reg(fd, attr, &core->buf[2], write);
attr = (cpu_index << 16) | CORE_BUF_30;
kvm_ipi_access_reg(fd, attr, &core->buf[4], write);
attr = (cpu_index << 16) | CORE_BUF_38;
kvm_ipi_access_reg(fd, attr, &core->buf[6], write);
}
}
int kvm_ipi_get(void *opaque)
{
kvm_ipi_access_regs(opaque, false);
return 0;
}
int kvm_ipi_put(void *opaque, int version_id)
{
kvm_ipi_access_regs(opaque, true);
return 0;
}
void kvm_ipi_realize(DeviceState *dev, Error **errp)
{
LoongarchIPIState *lis = LOONGARCH_IPI(dev);
int ret;
ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_IPI, false);
if (ret < 0) {
fprintf(stderr, "IPI KVM_CREATE_DEVICE failed: %s\n",
strerror(-ret));
abort();
}
lis->dev_fd = ret;
}
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