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hw/intc/loongarch_pch: Add kernel irqchip realize function

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Function kvm_pic_realize() is added if kvm_irqchip_in_kernel() return true.
It is to notify KVM kernel to create and initialize PCH PCI device in
kernel mode.

Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Message-ID: <20250606063033.2557365-8-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Bibo Mao 2025-06-06 14:30:27 +08:00 • committed by Song Gao
parent 5b0e05b902
commit b758e28974
4 changed files with 53 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

6
hw/intc/loongarch_pch_pic.c
View file

@ -10,6 +10,7 @@
#include "qemu/log.h"
#include "hw/irq.h"
#include "hw/intc/loongarch_pch_pic.h"
#include "system/kvm.h"
#include "trace.h"
#include "qapi/error.h"
@ -275,10 +276,15 @@ static void loongarch_pic_realize(DeviceState *dev, Error **errp)
qdev_init_gpio_out(dev, s->parent_irq, s->irq_num);
qdev_init_gpio_in(dev, pch_pic_irq_handler, s->irq_num);
if (kvm_irqchip_in_kernel()) {
kvm_pic_realize(dev, errp);
} else {
memory_region_init_io(&s->iomem, OBJECT(dev),
&loongarch_pch_pic_ops,
s, TYPE_LOONGARCH_PIC, VIRT_PCH_REG_SIZE);
sysbus_init_mmio(sbd, &s->iomem);
}
}
static void loongarch_pic_class_init(ObjectClass *klass, const void *data)

38
hw/intc/loongarch_pic_kvm.c Normal file
View file

@ -0,0 +1,38 @@
/* 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"
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();
}
}

2
hw/intc/meson.build
View file

@ -74,6 +74,8 @@ specific_ss.add(when: 'CONFIG_LOONGARCH_IPI', if_true: files('loongarch_ipi.c'))
specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_LOONGARCH_IPI'],
if_true: files('loongarch_ipi_kvm.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_PIC', if_true: files('loongarch_pch_pic.c', 'loongarch_pic_common.c'))
specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_LOONGARCH_PCH_PIC'],
if_true: files('loongarch_pic_kvm.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_PCH_MSI', if_true: files('loongarch_pch_msi.c'))
specific_ss.add(when: 'CONFIG_LOONGARCH_EXTIOI', if_true: files('loongarch_extioi.c', 'loongarch_extioi_common.c'))
specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_LOONGARCH_EXTIOI'],

3
include/hw/intc/loongarch_pch_pic.h
View file

@ -16,6 +16,7 @@ OBJECT_DECLARE_TYPE(LoongarchPICState, LoongarchPICClass, LOONGARCH_PIC)
struct LoongarchPICState {
LoongArchPICCommonState parent_obj;
int dev_fd;
};
struct LoongarchPICClass {
@ -25,4 +26,6 @@ struct LoongarchPICClass {
ResettablePhases parent_phases;
};
void kvm_pic_realize(DeviceState *dev, Error **errp);
#endif /* HW_LOONGARCH_PCH_PIC_H */