1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * LoongArch kvm pch pic interrupt support
4 *
5 * Copyright (C) 2025 Loongson Technology Corporation Limited
6 */
7
8 #include "qemu/osdep.h"
9 #include "qapi/error.h"
10 #include "hw/boards.h"
11 #include "hw/intc/loongarch_pch_pic.h"
12 #include "hw/loongarch/virt.h"
13 #include "hw/pci-host/ls7a.h"
14 #include "system/kvm.h"
15
kvm_pch_pic_access_reg(int fd,uint64_t addr,void * val,bool write)16 static void kvm_pch_pic_access_reg(int fd, uint64_t addr, void *val, bool write)
17 {
18 kvm_device_access(fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_REGS,
19 addr, val, write, &error_abort);
20 }
21
kvm_pch_pic_access(void * opaque,bool write)22 static void kvm_pch_pic_access(void *opaque, bool write)
23 {
24 LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
25 LoongarchPICState *lps = LOONGARCH_PIC(opaque);
26 int fd = lps->dev_fd;
27 int addr, offset;
28
29 if (fd == 0) {
30 return;
31 }
32
33 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_MASK, &s->int_mask, write);
34 kvm_pch_pic_access_reg(fd, PCH_PIC_HTMSI_EN, &s->htmsi_en, write);
35 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_EDGE, &s->intedge, write);
36 kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL0, &s->auto_crtl0, write);
37 kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL1, &s->auto_crtl1, write);
38
39 for (addr = PCH_PIC_ROUTE_ENTRY;
40 addr < PCH_PIC_ROUTE_ENTRY_END; addr++) {
41 offset = addr - PCH_PIC_ROUTE_ENTRY;
42 kvm_pch_pic_access_reg(fd, addr, &s->route_entry[offset], write);
43 }
44
45 for (addr = PCH_PIC_HTMSI_VEC; addr < PCH_PIC_HTMSI_VEC_END; addr++) {
46 offset = addr - PCH_PIC_HTMSI_VEC;
47 kvm_pch_pic_access_reg(fd, addr, &s->htmsi_vector[offset], write);
48 }
49
50 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_REQUEST, &s->intirr, write);
51 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_STATUS, &s->intisr, write);
52 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_POL, &s->int_polarity, write);
53 }
54
kvm_pic_get(void * opaque)55 int kvm_pic_get(void *opaque)
56 {
57 kvm_pch_pic_access(opaque, false);
58 return 0;
59 }
60
kvm_pic_put(void * opaque,int version_id)61 int kvm_pic_put(void *opaque, int version_id)
62 {
63 kvm_pch_pic_access(opaque, true);
64 return 0;
65 }
66
kvm_pic_realize(DeviceState * dev,Error ** errp)67 void kvm_pic_realize(DeviceState *dev, Error **errp)
68 {
69 LoongarchPICState *lps = LOONGARCH_PIC(dev);
70 uint64_t pch_pic_base = VIRT_PCH_REG_BASE;
71 int ret;
72
73 ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false);
74 if (ret < 0) {
75 fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n",
76 strerror(-ret));
77 abort();
78 }
79
80 lps->dev_fd = ret;
81 ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL,
82 KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT,
83 &pch_pic_base, true, NULL);
84 if (ret < 0) {
85 fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n",
86 strerror(-ret));
87 abort();
88 }
89 }
90