xref: /qemu/hw/intc/loongarch_pic_kvm.c (revision 11a04c9f40ac479f68139f6801da314591e67ae1)
1b758e289SBibo Mao /* SPDX-License-Identifier: GPL-2.0-or-later */
2b758e289SBibo Mao /*
3b758e289SBibo Mao  * LoongArch kvm pch pic interrupt support
4b758e289SBibo Mao  *
5b758e289SBibo Mao  * Copyright (C) 2025 Loongson Technology Corporation Limited
6b758e289SBibo Mao  */
7b758e289SBibo Mao 
8b758e289SBibo Mao #include "qemu/osdep.h"
9b758e289SBibo Mao #include "qapi/error.h"
10b758e289SBibo Mao #include "hw/boards.h"
11b758e289SBibo Mao #include "hw/intc/loongarch_pch_pic.h"
12b758e289SBibo Mao #include "hw/loongarch/virt.h"
13b758e289SBibo Mao #include "hw/pci-host/ls7a.h"
14b758e289SBibo Mao #include "system/kvm.h"
15b758e289SBibo Mao 
16*11a04c9fSBibo Mao static void kvm_pch_pic_access_reg(int fd, uint64_t addr, void *val, bool write)
17*11a04c9fSBibo Mao {
18*11a04c9fSBibo Mao     kvm_device_access(fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_REGS,
19*11a04c9fSBibo Mao                       addr, val, write, &error_abort);
20*11a04c9fSBibo Mao }
21*11a04c9fSBibo Mao 
22*11a04c9fSBibo Mao static void kvm_pch_pic_access(void *opaque, bool write)
23*11a04c9fSBibo Mao {
24*11a04c9fSBibo Mao     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
25*11a04c9fSBibo Mao     LoongarchPICState *lps = LOONGARCH_PIC(opaque);
26*11a04c9fSBibo Mao     int fd = lps->dev_fd;
27*11a04c9fSBibo Mao     int addr, offset;
28*11a04c9fSBibo Mao 
29*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_MASK, &s->int_mask, write);
30*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_HTMSI_EN, &s->htmsi_en, write);
31*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_EDGE, &s->intedge, write);
32*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL0, &s->auto_crtl0, write);
33*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL1, &s->auto_crtl1, write);
34*11a04c9fSBibo Mao 
35*11a04c9fSBibo Mao     for (addr = PCH_PIC_ROUTE_ENTRY;
36*11a04c9fSBibo Mao         addr < PCH_PIC_ROUTE_ENTRY_END; addr++) {
37*11a04c9fSBibo Mao         offset = addr - PCH_PIC_ROUTE_ENTRY;
38*11a04c9fSBibo Mao         kvm_pch_pic_access_reg(fd, addr, &s->route_entry[offset], write);
39*11a04c9fSBibo Mao     }
40*11a04c9fSBibo Mao 
41*11a04c9fSBibo Mao     for (addr = PCH_PIC_HTMSI_VEC; addr < PCH_PIC_HTMSI_VEC_END; addr++) {
42*11a04c9fSBibo Mao         offset = addr - PCH_PIC_HTMSI_VEC;
43*11a04c9fSBibo Mao         kvm_pch_pic_access_reg(fd, addr, &s->htmsi_vector[offset], write);
44*11a04c9fSBibo Mao     }
45*11a04c9fSBibo Mao 
46*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_REQUEST, &s->intirr, write);
47*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_STATUS, &s->intisr, write);
48*11a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_POL, &s->int_polarity, write);
49*11a04c9fSBibo Mao }
50*11a04c9fSBibo Mao 
51*11a04c9fSBibo Mao int kvm_pic_get(void *opaque)
52*11a04c9fSBibo Mao {
53*11a04c9fSBibo Mao     kvm_pch_pic_access(opaque, false);
54*11a04c9fSBibo Mao     return 0;
55*11a04c9fSBibo Mao }
56*11a04c9fSBibo Mao 
57*11a04c9fSBibo Mao int kvm_pic_put(void *opaque, int version_id)
58*11a04c9fSBibo Mao {
59*11a04c9fSBibo Mao     kvm_pch_pic_access(opaque, true);
60*11a04c9fSBibo Mao     return 0;
61*11a04c9fSBibo Mao }
62*11a04c9fSBibo Mao 
63b758e289SBibo Mao void kvm_pic_realize(DeviceState *dev, Error **errp)
64b758e289SBibo Mao {
65b758e289SBibo Mao     LoongarchPICState *lps = LOONGARCH_PIC(dev);
66b758e289SBibo Mao     uint64_t pch_pic_base = VIRT_PCH_REG_BASE;
67b758e289SBibo Mao     int ret;
68b758e289SBibo Mao 
69b758e289SBibo Mao     ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false);
70b758e289SBibo Mao     if (ret < 0) {
71b758e289SBibo Mao         fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n",
72b758e289SBibo Mao                 strerror(-ret));
73b758e289SBibo Mao         abort();
74b758e289SBibo Mao     }
75b758e289SBibo Mao 
76b758e289SBibo Mao     lps->dev_fd = ret;
77b758e289SBibo Mao     ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL,
78b758e289SBibo Mao                             KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT,
79b758e289SBibo Mao                             &pch_pic_base, true, NULL);
80b758e289SBibo Mao     if (ret < 0) {
81b758e289SBibo Mao         fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n",
82b758e289SBibo Mao                 strerror(-ret));
83b758e289SBibo Mao         abort();
84b758e289SBibo Mao     }
85b758e289SBibo Mao }
86