xref: /openbmc/qemu/include/hw/arm/virt.h (revision 2b74dd91)
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/arm/bsa.h"
38 #include "hw/block/flash.h"
39 #include "sysemu/kvm.h"
40 #include "hw/intc/arm_gicv3_common.h"
41 #include "qom/object.h"
42 
43 #define NUM_GICV2M_SPIS       64
44 #define NUM_VIRTIO_TRANSPORTS 32
45 #define NUM_SMMU_IRQS          4
46 
47 /* See Linux kernel arch/arm64/include/asm/pvclock-abi.h */
48 #define PVTIME_SIZE_PER_CPU 64
49 
50 /* GPIO pins */
51 #define GPIO_PIN_POWER_BUTTON  3
52 
53 enum {
54     VIRT_FLASH,
55     VIRT_MEM,
56     VIRT_CPUPERIPHS,
57     VIRT_GIC_DIST,
58     VIRT_GIC_CPU,
59     VIRT_GIC_V2M,
60     VIRT_GIC_HYP,
61     VIRT_GIC_VCPU,
62     VIRT_GIC_ITS,
63     VIRT_GIC_REDIST,
64     VIRT_SMMU,
65     VIRT_UART0,
66     VIRT_MMIO,
67     VIRT_RTC,
68     VIRT_FW_CFG,
69     VIRT_PCIE,
70     VIRT_PCIE_MMIO,
71     VIRT_PCIE_PIO,
72     VIRT_PCIE_ECAM,
73     VIRT_PLATFORM_BUS,
74     VIRT_GPIO,
75     VIRT_UART1,
76     VIRT_SECURE_MEM,
77     VIRT_SECURE_GPIO,
78     VIRT_PCDIMM_ACPI,
79     VIRT_ACPI_GED,
80     VIRT_NVDIMM_ACPI,
81     VIRT_PVTIME,
82     VIRT_LOWMEMMAP_LAST,
83 };
84 
85 /* indices of IO regions located after the RAM */
86 enum {
87     VIRT_HIGH_GIC_REDIST2 =  VIRT_LOWMEMMAP_LAST,
88     VIRT_HIGH_PCIE_ECAM,
89     VIRT_HIGH_PCIE_MMIO,
90 };
91 
92 typedef enum VirtIOMMUType {
93     VIRT_IOMMU_NONE,
94     VIRT_IOMMU_SMMUV3,
95     VIRT_IOMMU_VIRTIO,
96 } VirtIOMMUType;
97 
98 typedef enum VirtMSIControllerType {
99     VIRT_MSI_CTRL_NONE,
100     VIRT_MSI_CTRL_GICV2M,
101     VIRT_MSI_CTRL_ITS,
102 } VirtMSIControllerType;
103 
104 typedef enum VirtGICType {
105     VIRT_GIC_VERSION_MAX = 0,
106     VIRT_GIC_VERSION_HOST = 1,
107     /* The concrete GIC values have to match the GIC version number */
108     VIRT_GIC_VERSION_2 = 2,
109     VIRT_GIC_VERSION_3 = 3,
110     VIRT_GIC_VERSION_4 = 4,
111     VIRT_GIC_VERSION_NOSEL,
112 } VirtGICType;
113 
114 #define VIRT_GIC_VERSION_2_MASK BIT(VIRT_GIC_VERSION_2)
115 #define VIRT_GIC_VERSION_3_MASK BIT(VIRT_GIC_VERSION_3)
116 #define VIRT_GIC_VERSION_4_MASK BIT(VIRT_GIC_VERSION_4)
117 
118 struct VirtMachineClass {
119     MachineClass parent;
120     bool disallow_affinity_adjustment;
121     bool no_its;
122     bool no_tcg_its;
123     bool no_pmu;
124     bool claim_edge_triggered_timers;
125     bool smbios_old_sys_ver;
126     bool no_highmem_compact;
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     bool no_ns_el2_virt_timer_irq;
137     bool no_nested_smmu;
138 };
139 
140 struct VirtMachineState {
141     MachineState parent;
142     Notifier machine_done;
143     DeviceState *platform_bus_dev;
144     FWCfgState *fw_cfg;
145     PFlashCFI01 *flash[2];
146     bool secure;
147     bool highmem;
148     bool highmem_compact;
149     bool highmem_ecam;
150     bool highmem_mmio;
151     bool highmem_redists;
152     bool its;
153     bool tcg_its;
154     bool virt;
155     bool ras;
156     bool mte;
157     bool dtb_randomness;
158     bool second_ns_uart_present;
159     OnOffAuto acpi;
160     VirtGICType gic_version;
161     VirtIOMMUType iommu;
162     bool default_bus_bypass_iommu;
163     VirtMSIControllerType msi_controller;
164     uint16_t virtio_iommu_bdf;
165     struct arm_boot_info bootinfo;
166     MemMapEntry *memmap;
167     char *pciehb_nodename;
168     const int *irqmap;
169     int fdt_size;
170     uint32_t clock_phandle;
171     uint32_t gic_phandle;
172     uint32_t msi_phandle;
173     uint32_t iommu_phandle;
174     int psci_conduit;
175     hwaddr highest_gpa;
176     DeviceState *gic;
177     DeviceState *acpi_dev;
178     Notifier powerdown_notifier;
179     PCIBus *bus;
180     char *oem_id;
181     char *oem_table_id;
182     bool ns_el2_virt_timer_irq;
183 };
184 
185 #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM)
186 
187 #define TYPE_VIRT_MACHINE   MACHINE_TYPE_NAME("virt")
188 OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE)
189 
190 void virt_acpi_setup(VirtMachineState *vms);
191 bool virt_is_acpi_enabled(VirtMachineState *vms);
192 
193 /* Return number of redistributors that fit in the specified region */
194 static uint32_t virt_redist_capacity(VirtMachineState *vms, int region)
195 {
196     uint32_t redist_size;
197 
198     if (vms->gic_version == VIRT_GIC_VERSION_3) {
199         redist_size = GICV3_REDIST_SIZE;
200     } else {
201         redist_size = GICV4_REDIST_SIZE;
202     }
203     return vms->memmap[region].size / redist_size;
204 }
205 
206 /* Return the number of used redistributor regions  */
207 static inline int virt_gicv3_redist_region_count(VirtMachineState *vms)
208 {
209     uint32_t redist0_capacity = virt_redist_capacity(vms, VIRT_GIC_REDIST);
210 
211     assert(vms->gic_version != VIRT_GIC_VERSION_2);
212 
213     return (MACHINE(vms)->smp.cpus > redist0_capacity &&
214             vms->highmem_redists) ? 2 : 1;
215 }
216 
217 #endif /* QEMU_ARM_VIRT_H */
218