include/hw/arm/virt.h

   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_4,
 117     VIRT_GIC_VERSION_NOSEL,
 118 } VirtGICType;
 119
 120 struct VirtMachineClass {
 121     MachineClass parent;
 122     bool disallow_affinity_adjustment;
 123     bool no_its;
 124     bool no_tcg_its;
 125     bool no_pmu;
 126     bool claim_edge_triggered_timers;
 127     bool smbios_old_sys_ver;
 128     bool no_highmem_ecam;
 129     bool no_ged;   /* Machines < 4.2 have no support for ACPI GED device */
 130     bool kvm_no_adjvtime;
 131     bool no_kvm_steal_time;
 132     bool acpi_expose_flash;
 133     bool no_secure_gpio;
 134     /* Machines < 6.2 have no support for describing cpu topology to guest */
 135     bool no_cpu_topology;
 136     bool no_tcg_lpa2;
 137 };
 138
 139 struct VirtMachineState {
 140     MachineState parent;
 141     Notifier machine_done;
 142     DeviceState *platform_bus_dev;
 143     FWCfgState *fw_cfg;
 144     PFlashCFI01 *flash[2];
 145     bool secure;
 146     bool highmem;
 147     bool highmem_compact;
 148     bool highmem_ecam;
 149     bool highmem_mmio;
 150     bool highmem_redists;
 151     bool its;
 152     bool tcg_its;
 153     bool virt;
 154     bool ras;
 155     bool mte;
 156     bool dtb_randomness;
 157     OnOffAuto acpi;
 158     VirtGICType gic_version;
 159     VirtIOMMUType iommu;
 160     bool default_bus_bypass_iommu;
 161     VirtMSIControllerType msi_controller;
 162     uint16_t virtio_iommu_bdf;
 163     struct arm_boot_info bootinfo;
 164     MemMapEntry *memmap;
 165     char *pciehb_nodename;
 166     const int *irqmap;
 167     int fdt_size;
 168     uint32_t clock_phandle;
 169     uint32_t gic_phandle;
 170     uint32_t msi_phandle;
 171     uint32_t iommu_phandle;
 172     int psci_conduit;
 173     hwaddr highest_gpa;
 174     DeviceState *gic;
 175     DeviceState *acpi_dev;
 176     Notifier powerdown_notifier;
 177     PCIBus *bus;
 178     char *oem_id;
 179     char *oem_table_id;
 180 };
 181
 182 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM)
 183
 184 #define TYPE_VIRT_MACHINE   MACHINE_TYPE_NAME("virt")
 185 OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE)
 186
 187 void virt_acpi_setup(VirtMachineState *vms);
 188 bool virt_is_acpi_enabled(VirtMachineState *vms);
 189
 190 /* Return number of redistributors that fit in the specified region */
 191 static uint32_t virt_redist_capacity(VirtMachineState *vms, int region)
 192 {
 193     uint32_t redist_size;
 194
 195     if (vms->gic_version == VIRT_GIC_VERSION_3) {
 196         redist_size = GICV3_REDIST_SIZE;
 197     } else {
 198         redist_size = GICV4_REDIST_SIZE;
 199     }
 200     return vms->memmap[region].size / redist_size;
 201 }
 202
 203 /* Return the number of used redistributor regions  */
 204 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms)
 205 {
 206     uint32_t redist0_capacity = virt_redist_capacity(vms, VIRT_GIC_REDIST);
 207
 208     assert(vms->gic_version != VIRT_GIC_VERSION_2);
 209
 210     return (MACHINE(vms)->smp.cpus > redist0_capacity &&
 211             vms->highmem_redists) ? 2 : 1;
 212 }
 213
 214 #endif /* QEMU_ARM_VIRT_H */