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 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 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 55 int kvm_pic_get(void *opaque) 56 { 57 kvm_pch_pic_access(opaque, false); 58 return 0; 59 } 60 61 int kvm_pic_put(void *opaque, int version_id) 62 { 63 kvm_pch_pic_access(opaque, true); 64 return 0; 65 } 66 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