1 /* 2 * 3 * Copyright (c) 2015 Linaro Limited 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2 or later, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program. If not, see <http://www.gnu.org/licenses/>. 16 * 17 * Emulate a virtual board which works by passing Linux all the information 18 * it needs about what devices are present via the device tree. 19 * There are some restrictions about what we can do here: 20 * + we can only present devices whose Linux drivers will work based 21 * purely on the device tree with no platform data at all 22 * + we want to present a very stripped-down minimalist platform, 23 * both because this reduces the security attack surface from the guest 24 * and also because it reduces our exposure to being broken when 25 * the kernel updates its device tree bindings and requires further 26 * information in a device binding that we aren't providing. 27 * This is essentially the same approach kvmtool uses. 28 */ 29 30 #ifndef QEMU_ARM_VIRT_H 31 #define QEMU_ARM_VIRT_H 32 33 #include "exec/hwaddr.h" 34 #include "qemu/notify.h" 35 #include "hw/boards.h" 36 #include "hw/arm/boot.h" 37 #include "hw/block/flash.h" 38 #include "sysemu/kvm.h" 39 #include "hw/intc/arm_gicv3_common.h" 40 #include "qom/object.h" 41 42 #define NUM_GICV2M_SPIS 64 43 #define NUM_VIRTIO_TRANSPORTS 32 44 #define NUM_SMMU_IRQS 4 45 46 #define ARCH_GIC_MAINT_IRQ 9 47 48 #define ARCH_TIMER_VIRT_IRQ 11 49 #define ARCH_TIMER_S_EL1_IRQ 13 50 #define ARCH_TIMER_NS_EL1_IRQ 14 51 #define ARCH_TIMER_NS_EL2_IRQ 10 52 53 #define VIRTUAL_PMU_IRQ 7 54 55 #define PPI(irq) ((irq) + 16) 56 57 /* See Linux kernel arch/arm64/include/asm/pvclock-abi.h */ 58 #define PVTIME_SIZE_PER_CPU 64 59 60 enum { 61 VIRT_FLASH, 62 VIRT_MEM, 63 VIRT_CPUPERIPHS, 64 VIRT_GIC_DIST, 65 VIRT_GIC_CPU, 66 VIRT_GIC_V2M, 67 VIRT_GIC_HYP, 68 VIRT_GIC_VCPU, 69 VIRT_GIC_ITS, 70 VIRT_GIC_REDIST, 71 VIRT_SMMU, 72 VIRT_UART, 73 VIRT_MMIO, 74 VIRT_RTC, 75 VIRT_FW_CFG, 76 VIRT_PCIE, 77 VIRT_PCIE_MMIO, 78 VIRT_PCIE_PIO, 79 VIRT_PCIE_ECAM, 80 VIRT_PLATFORM_BUS, 81 VIRT_GPIO, 82 VIRT_SECURE_UART, 83 VIRT_SECURE_MEM, 84 VIRT_PCDIMM_ACPI, 85 VIRT_ACPI_GED, 86 VIRT_NVDIMM_ACPI, 87 VIRT_PVTIME, 88 VIRT_LOWMEMMAP_LAST, 89 }; 90 91 /* indices of IO regions located after the RAM */ 92 enum { 93 VIRT_HIGH_GIC_REDIST2 = VIRT_LOWMEMMAP_LAST, 94 VIRT_HIGH_PCIE_ECAM, 95 VIRT_HIGH_PCIE_MMIO, 96 }; 97 98 typedef enum VirtIOMMUType { 99 VIRT_IOMMU_NONE, 100 VIRT_IOMMU_SMMUV3, 101 VIRT_IOMMU_VIRTIO, 102 } VirtIOMMUType; 103 104 typedef enum VirtMSIControllerType { 105 VIRT_MSI_CTRL_NONE, 106 VIRT_MSI_CTRL_GICV2M, 107 VIRT_MSI_CTRL_ITS, 108 } VirtMSIControllerType; 109 110 typedef enum VirtGICType { 111 VIRT_GIC_VERSION_MAX, 112 VIRT_GIC_VERSION_HOST, 113 VIRT_GIC_VERSION_2, 114 VIRT_GIC_VERSION_3, 115 VIRT_GIC_VERSION_NOSEL, 116 } VirtGICType; 117 118 struct VirtMachineClass { 119 MachineClass parent; 120 bool disallow_affinity_adjustment; 121 bool no_its; 122 bool no_pmu; 123 bool claim_edge_triggered_timers; 124 bool smbios_old_sys_ver; 125 bool no_highmem_ecam; 126 bool no_ged; /* Machines < 4.2 has no support for ACPI GED device */ 127 bool kvm_no_adjvtime; 128 bool no_kvm_steal_time; 129 bool acpi_expose_flash; 130 }; 131 132 struct VirtMachineState { 133 MachineState parent; 134 Notifier machine_done; 135 DeviceState *platform_bus_dev; 136 FWCfgState *fw_cfg; 137 PFlashCFI01 *flash[2]; 138 bool secure; 139 bool highmem; 140 bool highmem_ecam; 141 bool its; 142 bool virt; 143 bool ras; 144 bool mte; 145 OnOffAuto acpi; 146 VirtGICType gic_version; 147 VirtIOMMUType iommu; 148 VirtMSIControllerType msi_controller; 149 uint16_t virtio_iommu_bdf; 150 struct arm_boot_info bootinfo; 151 MemMapEntry *memmap; 152 char *pciehb_nodename; 153 const int *irqmap; 154 void *fdt; 155 int fdt_size; 156 uint32_t clock_phandle; 157 uint32_t gic_phandle; 158 uint32_t msi_phandle; 159 uint32_t iommu_phandle; 160 int psci_conduit; 161 hwaddr highest_gpa; 162 DeviceState *gic; 163 DeviceState *acpi_dev; 164 Notifier powerdown_notifier; 165 PCIBus *bus; 166 }; 167 168 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM) 169 170 #define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt") 171 OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE) 172 173 void virt_acpi_setup(VirtMachineState *vms); 174 bool virt_is_acpi_enabled(VirtMachineState *vms); 175 176 /* Return the number of used redistributor regions */ 177 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms) 178 { 179 uint32_t redist0_capacity = 180 vms->memmap[VIRT_GIC_REDIST].size / GICV3_REDIST_SIZE; 181 182 assert(vms->gic_version == VIRT_GIC_VERSION_3); 183 184 return MACHINE(vms)->smp.cpus > redist0_capacity ? 2 : 1; 185 } 186 187 #endif /* QEMU_ARM_VIRT_H */ 188