xref: /qemu/hw/intc/loongarch_pic_kvm.c (revision c642ddf19b248bb668e40a8d15089b877e4057fa)
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 
1611a04c9fSBibo Mao static void kvm_pch_pic_access_reg(int fd, uint64_t addr, void *val, bool write)
1711a04c9fSBibo Mao {
1811a04c9fSBibo Mao     kvm_device_access(fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_REGS,
1911a04c9fSBibo Mao                       addr, val, write, &error_abort);
2011a04c9fSBibo Mao }
2111a04c9fSBibo Mao 
2211a04c9fSBibo Mao static void kvm_pch_pic_access(void *opaque, bool write)
2311a04c9fSBibo Mao {
2411a04c9fSBibo Mao     LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(opaque);
2511a04c9fSBibo Mao     LoongarchPICState *lps = LOONGARCH_PIC(opaque);
2611a04c9fSBibo Mao     int fd = lps->dev_fd;
2711a04c9fSBibo Mao     int addr, offset;
2811a04c9fSBibo Mao 
29*c642ddf1SBibo Mao     if (fd == 0) {
30*c642ddf1SBibo Mao         return;
31*c642ddf1SBibo Mao     }
32*c642ddf1SBibo Mao 
3311a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_MASK, &s->int_mask, write);
3411a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_HTMSI_EN, &s->htmsi_en, write);
3511a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_EDGE, &s->intedge, write);
3611a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL0, &s->auto_crtl0, write);
3711a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL1, &s->auto_crtl1, write);
3811a04c9fSBibo Mao 
3911a04c9fSBibo Mao     for (addr = PCH_PIC_ROUTE_ENTRY;
4011a04c9fSBibo Mao         addr < PCH_PIC_ROUTE_ENTRY_END; addr++) {
4111a04c9fSBibo Mao         offset = addr - PCH_PIC_ROUTE_ENTRY;
4211a04c9fSBibo Mao         kvm_pch_pic_access_reg(fd, addr, &s->route_entry[offset], write);
4311a04c9fSBibo Mao     }
4411a04c9fSBibo Mao 
4511a04c9fSBibo Mao     for (addr = PCH_PIC_HTMSI_VEC; addr < PCH_PIC_HTMSI_VEC_END; addr++) {
4611a04c9fSBibo Mao         offset = addr - PCH_PIC_HTMSI_VEC;
4711a04c9fSBibo Mao         kvm_pch_pic_access_reg(fd, addr, &s->htmsi_vector[offset], write);
4811a04c9fSBibo Mao     }
4911a04c9fSBibo Mao 
5011a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_REQUEST, &s->intirr, write);
5111a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_STATUS, &s->intisr, write);
5211a04c9fSBibo Mao     kvm_pch_pic_access_reg(fd, PCH_PIC_INT_POL, &s->int_polarity, write);
5311a04c9fSBibo Mao }
5411a04c9fSBibo Mao 
5511a04c9fSBibo Mao int kvm_pic_get(void *opaque)
5611a04c9fSBibo Mao {
5711a04c9fSBibo Mao     kvm_pch_pic_access(opaque, false);
5811a04c9fSBibo Mao     return 0;
5911a04c9fSBibo Mao }
6011a04c9fSBibo Mao 
6111a04c9fSBibo Mao int kvm_pic_put(void *opaque, int version_id)
6211a04c9fSBibo Mao {
6311a04c9fSBibo Mao     kvm_pch_pic_access(opaque, true);
6411a04c9fSBibo Mao     return 0;
6511a04c9fSBibo Mao }
6611a04c9fSBibo Mao 
67b758e289SBibo Mao void kvm_pic_realize(DeviceState *dev, Error **errp)
68b758e289SBibo Mao {
69b758e289SBibo Mao     LoongarchPICState *lps = LOONGARCH_PIC(dev);
70b758e289SBibo Mao     uint64_t pch_pic_base = VIRT_PCH_REG_BASE;
71b758e289SBibo Mao     int ret;
72b758e289SBibo Mao 
73b758e289SBibo Mao     ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false);
74b758e289SBibo Mao     if (ret < 0) {
75b758e289SBibo Mao         fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n",
76b758e289SBibo Mao                 strerror(-ret));
77b758e289SBibo Mao         abort();
78b758e289SBibo Mao     }
79b758e289SBibo Mao 
80b758e289SBibo Mao     lps->dev_fd = ret;
81b758e289SBibo Mao     ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL,
82b758e289SBibo Mao                             KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT,
83b758e289SBibo Mao                             &pch_pic_base, true, NULL);
84b758e289SBibo Mao     if (ret < 0) {
85b758e289SBibo Mao         fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n",
86b758e289SBibo Mao                 strerror(-ret));
87b758e289SBibo Mao         abort();
88b758e289SBibo Mao     }
89b758e289SBibo Mao }
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