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https://github.com/Motorhead1991/qemu.git
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f936caa315
Add save and store funtction if kvm_irqchip_in_kernel() return true, it is to get and set IPI irqchip state from KVM kernel. Reviewed-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Bibo Mao <maobibo@loongson.cn> Message-ID: <20250606063033.2557365-6-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* LoongArch IPI interrupt KVM support
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*
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* Copyright (C) 2025 Loongson Technology Corporation Limited
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/intc/loongarch_ipi.h"
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#include "system/kvm.h"
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#include "target/loongarch/cpu.h"
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static void kvm_ipi_access_reg(int fd, uint64_t addr, uint32_t *val, bool write)
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{
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kvm_device_access(fd, KVM_DEV_LOONGARCH_IPI_GRP_REGS,
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addr, val, write, &error_abort);
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}
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static void kvm_ipi_access_regs(void *opaque, bool write)
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{
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LoongsonIPICommonState *ipi = (LoongsonIPICommonState *)opaque;
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LoongarchIPIState *lis = LOONGARCH_IPI(opaque);
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IPICore *core;
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uint64_t attr;
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int cpu, fd = lis->dev_fd;
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for (cpu = 0; cpu < ipi->num_cpu; cpu++) {
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core = &ipi->cpu[cpu];
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attr = (cpu << 16) | CORE_STATUS_OFF;
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kvm_ipi_access_reg(fd, attr, &core->status, write);
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attr = (cpu << 16) | CORE_EN_OFF;
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kvm_ipi_access_reg(fd, attr, &core->en, write);
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attr = (cpu << 16) | CORE_SET_OFF;
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kvm_ipi_access_reg(fd, attr, &core->set, write);
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attr = (cpu << 16) | CORE_CLEAR_OFF;
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kvm_ipi_access_reg(fd, attr, &core->clear, write);
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attr = (cpu << 16) | CORE_BUF_20;
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kvm_ipi_access_reg(fd, attr, &core->buf[0], write);
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attr = (cpu << 16) | CORE_BUF_28;
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kvm_ipi_access_reg(fd, attr, &core->buf[2], write);
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attr = (cpu << 16) | CORE_BUF_30;
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kvm_ipi_access_reg(fd, attr, &core->buf[4], write);
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attr = (cpu << 16) | CORE_BUF_38;
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kvm_ipi_access_reg(fd, attr, &core->buf[6], write);
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}
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}
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int kvm_ipi_get(void *opaque)
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{
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kvm_ipi_access_regs(opaque, false);
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return 0;
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}
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int kvm_ipi_put(void *opaque, int version_id)
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{
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kvm_ipi_access_regs(opaque, true);
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return 0;
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}
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void kvm_ipi_realize(DeviceState *dev, Error **errp)
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{
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LoongarchIPIState *lis = LOONGARCH_IPI(dev);
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int ret;
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ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_IPI, false);
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if (ret < 0) {
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fprintf(stderr, "IPI KVM_CREATE_DEVICE failed: %s\n",
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strerror(-ret));
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abort();
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}
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lis->dev_fd = ret;
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}
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