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