| 1 | /* |
| 2 | * Accelerated irqchip abstraction |
| 3 | * |
| 4 | * Copyright Microsoft, Corp. 2025 |
| 5 | * |
| 6 | * Authors: Ziqiao Zhou <ziqiaozhou@microsoft.com> |
| 7 | * Magnus Kulke <magnuskulke@microsoft.com> |
| 8 | * |
| 9 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 10 | */ |
| 11 | |
| 12 | #include "qemu/osdep.h" |
| 13 | #include "qemu/error-report.h" |
| 14 | #include "hw/pci/msi.h" |
| 15 | |
| 16 | #include "system/kvm.h" |
| 17 | #include "system/mshv.h" |
| 18 | #include "system/accel-irq.h" |
| 19 | |
| 20 | int accel_irqchip_add_msi_route(AccelRouteChange *c, int vector, PCIDevice *dev) |
| 21 | { |
| 22 | if (mshv_msi_via_irqfd_enabled()) { |
| 23 | return mshv_irqchip_add_msi_route(c, vector, dev); |
| 24 | } |
| 25 | if (kvm_enabled()) { |
| 26 | return kvm_irqchip_add_msi_route(c, vector, dev); |
| 27 | } |
| 28 | return -ENOSYS; |
| 29 | } |
| 30 | |
| 31 | int accel_irqchip_update_msi_route(int vector, MSIMessage msg, PCIDevice *dev) |
| 32 | { |
| 33 | if (mshv_msi_via_irqfd_enabled()) { |
| 34 | return mshv_irqchip_update_msi_route(vector, msg, dev); |
| 35 | } |
| 36 | if (kvm_enabled()) { |
| 37 | return kvm_irqchip_update_msi_route(kvm_state, vector, msg, dev); |
| 38 | } |
| 39 | return -ENOSYS; |
| 40 | } |
| 41 | |
| 42 | void accel_irqchip_commit_route_changes(AccelRouteChange *c) |
| 43 | { |
| 44 | if (c->changes) { |
| 45 | accel_irqchip_commit_routes(); |
| 46 | c->changes = 0; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | void accel_irqchip_commit_routes(void) |
| 51 | { |
| 52 | if (mshv_msi_via_irqfd_enabled()) { |
| 53 | mshv_irqchip_commit_routes(mshv_state); |
| 54 | } |
| 55 | if (kvm_enabled()) { |
| 56 | kvm_irqchip_commit_routes(kvm_state); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | void accel_irqchip_release_virq(int virq) |
| 61 | { |
| 62 | if (mshv_msi_via_irqfd_enabled()) { |
| 63 | mshv_irqchip_release_virq(mshv_state, virq); |
| 64 | } |
| 65 | if (kvm_enabled()) { |
| 66 | kvm_irqchip_release_virq(kvm_state, virq); |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | int accel_irqchip_add_irqfd_notifier_gsi(EventNotifier *n, EventNotifier *rn, |
| 71 | int virq) |
| 72 | { |
| 73 | if (mshv_msi_via_irqfd_enabled()) { |
| 74 | return mshv_irqchip_add_irqfd_notifier_gsi(n, rn, virq); |
| 75 | } |
| 76 | if (kvm_enabled()) { |
| 77 | return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, n, rn, virq); |
| 78 | } |
| 79 | return -ENOSYS; |
| 80 | } |
| 81 | |
| 82 | int accel_irqchip_remove_irqfd_notifier_gsi(EventNotifier *n, int virq) |
| 83 | { |
| 84 | if (mshv_msi_via_irqfd_enabled()) { |
| 85 | return mshv_irqchip_remove_irqfd_notifier_gsi(n, virq); |
| 86 | } |
| 87 | if (kvm_enabled()) { |
| 88 | return kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, n, virq); |
| 89 | } |
| 90 | return -ENOSYS; |
| 91 | } |
| 92 | |
| 93 | inline AccelRouteChange accel_irqchip_begin_route_changes(void) |
| 94 | { |
| 95 | if (mshv_msi_via_irqfd_enabled()) { |
| 96 | return (AccelRouteChange) { |
| 97 | .accel = ACCEL(mshv_state), |
| 98 | .changes = 0, |
| 99 | }; |
| 100 | } |
| 101 | if (kvm_enabled()) { |
| 102 | return (AccelRouteChange) { |
| 103 | .accel = ACCEL(kvm_state), |
| 104 | .changes = 0, |
| 105 | }; |
| 106 | } |
| 107 | error_report("can't initiate route change, no accel irqchip available"); |
| 108 | abort(); |
| 109 | } |