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/*
*
* Copyright (c) 2015 Linaro Limited
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
* Emulate a virtual board which works by passing Linux all the information
* it needs about what devices are present via the device tree.
* There are some restrictions about what we can do here:
* + we can only present devices whose Linux drivers will work based
* purely on the device tree with no platform data at all
* + we want to present a very stripped-down minimalist platform,
* both because this reduces the security attack surface from the guest
* and also because it reduces our exposure to being broken when
* the kernel updates its device tree bindings and requires further
* information in a device binding that we aren't providing.
* This is essentially the same approach kvmtool uses.
*/
#ifndef QEMU_ARM_VIRT_H
#define QEMU_ARM_VIRT_H
#include "exec/hwaddr.h"
#include "qemu/notify.h"
#include "hw/boards.h"
#include "hw/arm/boot.h"
#include "hw/arm/bsa.h"
#include "hw/block/flash.h"
#include "sysemu/kvm.h"
#include "hw/intc/arm_gicv3_common.h"
#include "qom/object.h"
#define NUM_GICV2M_SPIS 64
#define NUM_VIRTIO_TRANSPORTS 32
#define NUM_SMMU_IRQS 4
/* See Linux kernel arch/arm64/include/asm/pvclock-abi.h */
#define PVTIME_SIZE_PER_CPU 64
enum {
VIRT_FLASH,
VIRT_MEM,
VIRT_CPUPERIPHS,
VIRT_GIC_DIST,
VIRT_GIC_CPU,
VIRT_GIC_V2M,
VIRT_GIC_HYP,
VIRT_GIC_VCPU,
VIRT_GIC_ITS,
VIRT_GIC_REDIST,
VIRT_SMMU,
VIRT_UART,
VIRT_MMIO,
VIRT_RTC,
VIRT_FW_CFG,
VIRT_PCIE,
VIRT_PCIE_MMIO,
VIRT_PCIE_PIO,
VIRT_PCIE_ECAM,
VIRT_PLATFORM_BUS,
VIRT_GPIO,
VIRT_SECURE_UART,
VIRT_SECURE_MEM,
VIRT_SECURE_GPIO,
VIRT_PCDIMM_ACPI,
VIRT_ACPI_GED,
VIRT_NVDIMM_ACPI,
VIRT_PVTIME,
VIRT_LOWMEMMAP_LAST,
};
/* indices of IO regions located after the RAM */
enum {
VIRT_HIGH_GIC_REDIST2 = VIRT_LOWMEMMAP_LAST,
VIRT_HIGH_PCIE_ECAM,
VIRT_HIGH_PCIE_MMIO,
};
typedef enum VirtIOMMUType {
VIRT_IOMMU_NONE,
VIRT_IOMMU_SMMUV3,
VIRT_IOMMU_VIRTIO,
} VirtIOMMUType;
typedef enum VirtMSIControllerType {
VIRT_MSI_CTRL_NONE,
VIRT_MSI_CTRL_GICV2M,
VIRT_MSI_CTRL_ITS,
} VirtMSIControllerType;
typedef enum VirtGICType {
VIRT_GIC_VERSION_MAX = 0,
VIRT_GIC_VERSION_HOST = 1,
/* The concrete GIC values have to match the GIC version number */
VIRT_GIC_VERSION_2 = 2,
VIRT_GIC_VERSION_3 = 3,
VIRT_GIC_VERSION_4 = 4,
VIRT_GIC_VERSION_NOSEL,
} VirtGICType;
#define VIRT_GIC_VERSION_2_MASK BIT(VIRT_GIC_VERSION_2)
#define VIRT_GIC_VERSION_3_MASK BIT(VIRT_GIC_VERSION_3)
#define VIRT_GIC_VERSION_4_MASK BIT(VIRT_GIC_VERSION_4)
struct VirtMachineClass {
MachineClass parent;
bool disallow_affinity_adjustment;
bool no_its;
bool no_tcg_its;
bool no_pmu;
bool claim_edge_triggered_timers;
bool smbios_old_sys_ver;
bool no_highmem_compact;
bool no_highmem_ecam;
bool no_ged; /* Machines < 4.2 have no support for ACPI GED device */
bool kvm_no_adjvtime;
bool no_kvm_steal_time;
bool acpi_expose_flash;
bool no_secure_gpio;
/* Machines < 6.2 have no support for describing cpu topology to guest */
bool no_cpu_topology;
bool no_tcg_lpa2;
};
struct VirtMachineState {
MachineState parent;
Notifier machine_done;
DeviceState *platform_bus_dev;
FWCfgState *fw_cfg;
PFlashCFI01 *flash[2];
bool secure;
bool highmem;
bool highmem_compact;
bool highmem_ecam;
bool highmem_mmio;
bool highmem_redists;
bool its;
bool tcg_its;
bool virt;
bool ras;
bool mte;
bool dtb_randomness;
OnOffAuto acpi;
VirtGICType gic_version;
VirtIOMMUType iommu;
bool default_bus_bypass_iommu;
VirtMSIControllerType msi_controller;
uint16_t virtio_iommu_bdf;
struct arm_boot_info bootinfo;
MemMapEntry *memmap;
char *pciehb_nodename;
const int *irqmap;
int fdt_size;
uint32_t clock_phandle;
uint32_t gic_phandle;
uint32_t msi_phandle;
uint32_t iommu_phandle;
int psci_conduit;
hwaddr highest_gpa;
DeviceState *gic;
DeviceState *acpi_dev;
Notifier powerdown_notifier;
PCIBus *bus;
char *oem_id;
char *oem_table_id;
};
#define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : VIRT_PCIE_ECAM)
#define TYPE_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
OBJECT_DECLARE_TYPE(VirtMachineState, VirtMachineClass, VIRT_MACHINE)
void virt_acpi_setup(VirtMachineState *vms);
bool virt_is_acpi_enabled(VirtMachineState *vms);
/* Return number of redistributors that fit in the specified region */
static uint32_t virt_redist_capacity(VirtMachineState *vms, int region)
{
uint32_t redist_size;
if (vms->gic_version == VIRT_GIC_VERSION_3) {
redist_size = GICV3_REDIST_SIZE;
} else {
redist_size = GICV4_REDIST_SIZE;
}
return vms->memmap[region].size / redist_size;
}
/* Return the number of used redistributor regions */
static inline int virt_gicv3_redist_region_count(VirtMachineState *vms)
{
uint32_t redist0_capacity = virt_redist_capacity(vms, VIRT_GIC_REDIST);
assert(vms->gic_version != VIRT_GIC_VERSION_2);
return (MACHINE(vms)->smp.cpus > redist0_capacity &&
vms->highmem_redists) ? 2 : 1;
}
#endif /* QEMU_ARM_VIRT_H */
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