mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-07-26 11:53:53 -06:00
c642ddf19b
When system reboot, interrupt controller is restored to initial state. However if interrupt controller extioi/ipi/pch_pic is emulated in kernel, it should notify kvm to do so. Here suspend and restore API is used for reset, set initial state in qemu user space and restore API is used to notify kvm to reload register state. Reviewed-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Bibo Mao <maobibo@loongson.cn> Message-ID: <20250606063033.2557365-11-maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn>
89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/* 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();
|
|
}
|
|
}
|