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 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_MASK, &s->int_mask, write); 30 kvm_pch_pic_access_reg(fd, PCH_PIC_HTMSI_EN, &s->htmsi_en, write); 31 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_EDGE, &s->intedge, write); 32 kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL0, &s->auto_crtl0, write); 33 kvm_pch_pic_access_reg(fd, PCH_PIC_AUTO_CTRL1, &s->auto_crtl1, write); 34 35 for (addr = PCH_PIC_ROUTE_ENTRY; 36 addr < PCH_PIC_ROUTE_ENTRY_END; addr++) { 37 offset = addr - PCH_PIC_ROUTE_ENTRY; 38 kvm_pch_pic_access_reg(fd, addr, &s->route_entry[offset], write); 39 } 40 41 for (addr = PCH_PIC_HTMSI_VEC; addr < PCH_PIC_HTMSI_VEC_END; addr++) { 42 offset = addr - PCH_PIC_HTMSI_VEC; 43 kvm_pch_pic_access_reg(fd, addr, &s->htmsi_vector[offset], write); 44 } 45 46 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_REQUEST, &s->intirr, write); 47 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_STATUS, &s->intisr, write); 48 kvm_pch_pic_access_reg(fd, PCH_PIC_INT_POL, &s->int_polarity, write); 49 } 50 51 int kvm_pic_get(void *opaque) 52 { 53 kvm_pch_pic_access(opaque, false); 54 return 0; 55 } 56 57 int kvm_pic_put(void *opaque, int version_id) 58 { 59 kvm_pch_pic_access(opaque, true); 60 return 0; 61 } 62 63 void kvm_pic_realize(DeviceState *dev, Error **errp) 64 { 65 LoongarchPICState *lps = LOONGARCH_PIC(dev); 66 uint64_t pch_pic_base = VIRT_PCH_REG_BASE; 67 int ret; 68 69 ret = kvm_create_device(kvm_state, KVM_DEV_TYPE_LOONGARCH_PCHPIC, false); 70 if (ret < 0) { 71 fprintf(stderr, "Create KVM_LOONGARCH_PCHPIC failed: %s\n", 72 strerror(-ret)); 73 abort(); 74 } 75 76 lps->dev_fd = ret; 77 ret = kvm_device_access(lps->dev_fd, KVM_DEV_LOONGARCH_PCH_PIC_GRP_CTRL, 78 KVM_DEV_LOONGARCH_PCH_PIC_CTRL_INIT, 79 &pch_pic_base, true, NULL); 80 if (ret < 0) { 81 fprintf(stderr, "KVM_LOONGARCH_PCH_PIC_INIT failed: %s\n", 82 strerror(-ret)); 83 abort(); 84 } 85 } 86