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_SECURE_GPIO, 85 VIRT_PCDIMM_ACPI, 86 VIRT_ACPI_GED, 87 VIRT_NVDIMM_ACPI, 88 VIRT_PVTIME, 89 VIRT_LOWMEMMAP_LAST, 90 }; 91 92 /* indices of IO regions located after the RAM */ 93 enum { 94 VIRT_HIGH_GIC_REDIST2 = VIRT_LOWMEMMAP_LAST, 95 VIRT_HIGH_PCIE_ECAM, 96 VIRT_HIGH_PCIE_MMIO, 97 }; 98 99 typedef enum VirtIOMMUType { 100 VIRT_IOMMU_NONE, 101 VIRT_IOMMU_SMMUV3, 102 VIRT_IOMMU_VIRTIO, 103 } VirtIOMMUType; 104 105 typedef enum VirtMSIControllerType { 106 VIRT_MSI_CTRL_NONE, 107 VIRT_MSI_CTRL_GICV2M, 108 VIRT_MSI_CTRL_ITS, 109 } VirtMSIControllerType; 110 111 typedef enum VirtGICType { 112 VIRT_GIC_VERSION_MAX, 113 VIRT_GIC_VERSION_HOST, 114 VIRT_GIC_VERSION_2, 115 VIRT_GIC_VERSION_3, 116 VIRT_GIC_VERSION_NOSEL, 117 } VirtGICType; 118 119 struct VirtMachineClass { 120 MachineClass parent; 121 bool disallow_affinity_adjustment; 122 bool no_its; 123 bool no_tcg_its; 124 bool no_pmu; 125 bool claim_edge_triggered_timers; 126 bool smbios_old_sys_ver; 127 bool no_highmem_ecam; 128 bool no_ged; /* Machines < 4.2 have no support for ACPI GED device */ 129 bool kvm_no_adjvtime; 130 bool no_kvm_steal_time; 131 bool acpi_expose_flash; 132 bool no_secure_gpio; 133 /* Machines < 6.2 have no support for describing cpu topology to guest */ 134 bool no_cpu_topology; 135 bool no_tcg_lpa2; 136 }; 137 138 struct VirtMachineState { 139 MachineState parent; 140 Notifier machine_done; 141 DeviceState *platform_bus_dev; 142 FWCfgState *fw_cfg; 143 PFlashCFI01 *flash[2]; 144 bool secure; 145 bool highmem; 146 bool highmem_ecam; 147 bool highmem_mmio; 148 bool highmem_redists; 149 bool its; 150 bool tcg_its; 151 bool virt; 152 bool ras; 153 bool mte; 154 bool dtb_kaslr_seed; 155 OnOffAuto acpi; 156 VirtGICType gic_version; 157 VirtIOMMUType iommu; 158 bool default_bus_bypass_iommu; 159 VirtMSIControllerType msi_controller; 160 uint16_t virtio_iommu_bdf; 161 struct arm_boot_info bootinfo; 162 MemMapEntry *memmap; 163 char *pciehb_nodename; 164 const int *irqmap; 165 int fdt_size; 166 uint32_t clock_phandle; 167 uint32_t gic_phandle; 168 uint32_t msi_phandle; 169 uint32_t iommu_phandle; 170 int psci_conduit; 171 hwaddr highest_gpa; 172 DeviceState *gic; 173 DeviceState *acpi_dev; 174 Notifier powerdown_notifier; 175 PCIBus *bus; 176 char *oem_id; 177 char *oem_table_id; 178 }; 179 180 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM) 181 182 #define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt") 183 OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE) 184 185 void virt_acpi_setup(VirtMachineState *vms); 186 bool virt_is_acpi_enabled(VirtMachineState *vms); 187 188 /* Return the number of used redistributor regions */ 189 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms) 190 { 191 uint32_t redist0_capacity = 192 vms->memmap[VIRT_GIC_REDIST].size / GICV3_REDIST_SIZE; 193 194 assert(vms->gic_version == VIRT_GIC_VERSION_3); 195 196 return (MACHINE(vms)->smp.cpus > redist0_capacity && 197 vms->highmem_redists) ? 2 : 1; 198 } 199 200 #endif /* QEMU_ARM_VIRT_H */ 201