diff options
Diffstat (limited to 'Documentation/virtual/kvm/api.txt')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 66 |
1 files changed, 43 insertions, 23 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 7abe41b90993..ef925eaa1460 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -280,7 +280,7 @@ kvm_run' (see below). 4.11 KVM_GET_REGS Capability: basic -Architectures: all except ARM +Architectures: all except ARM, arm64 Type: vcpu ioctl Parameters: struct kvm_regs (out) Returns: 0 on success, -1 on error @@ -301,7 +301,7 @@ struct kvm_regs { 4.12 KVM_SET_REGS Capability: basic -Architectures: all except ARM +Architectures: all except ARM, arm64 Type: vcpu ioctl Parameters: struct kvm_regs (in) Returns: 0 on success, -1 on error @@ -587,7 +587,7 @@ struct kvm_fpu { 4.24 KVM_CREATE_IRQCHIP Capability: KVM_CAP_IRQCHIP -Architectures: x86, ia64, ARM +Architectures: x86, ia64, ARM, arm64 Type: vm ioctl Parameters: none Returns: 0 on success, -1 on error @@ -595,14 +595,14 @@ Returns: 0 on success, -1 on error Creates an interrupt controller model in the kernel. On x86, creates a virtual ioapic, a virtual PIC (two PICs, nested), and sets up future vcpus to have a local APIC. IRQ routing for GSIs 0-15 is set to both PIC and IOAPIC; GSI 16-23 -only go to the IOAPIC. On ia64, a IOSAPIC is created. On ARM, a GIC is +only go to the IOAPIC. On ia64, a IOSAPIC is created. On ARM/arm64, a GIC is created. 4.25 KVM_IRQ_LINE Capability: KVM_CAP_IRQCHIP -Architectures: x86, ia64, arm +Architectures: x86, ia64, arm, arm64 Type: vm ioctl Parameters: struct kvm_irq_level Returns: 0 on success, -1 on error @@ -612,9 +612,10 @@ On some architectures it is required that an interrupt controller model has been previously created with KVM_CREATE_IRQCHIP. Note that edge-triggered interrupts require the level to be set to 1 and then back to 0. -ARM can signal an interrupt either at the CPU level, or at the in-kernel irqchip -(GIC), and for in-kernel irqchip can tell the GIC to use PPIs designated for -specific cpus. The irq field is interpreted like this: +ARM/arm64 can signal an interrupt either at the CPU level, or at the +in-kernel irqchip (GIC), and for in-kernel irqchip can tell the GIC to +use PPIs designated for specific cpus. The irq field is interpreted +like this: bits: | 31 ... 24 | 23 ... 16 | 15 ... 0 | field: | irq_type | vcpu_index | irq_id | @@ -1831,6 +1832,22 @@ ARM 32-bit VFP control registers have the following id bit patterns: ARM 64-bit FP registers have the following id bit patterns: 0x4030 0000 0012 0 <regno:12> + +arm64 registers are mapped using the lower 32 bits. The upper 16 of +that is the register group type, or coprocessor number: + +arm64 core/FP-SIMD registers have the following id bit patterns. Note +that the size of the access is variable, as the kvm_regs structure +contains elements ranging from 32 to 128 bits. The index is a 32bit +value in the kvm_regs structure seen as a 32bit array. + 0x60x0 0000 0010 <index into the kvm_regs struct:16> + +arm64 CCSIDR registers are demultiplexed by CSSELR value: + 0x6020 0000 0011 00 <csselr:8> + +arm64 system registers have the following id bit patterns: + 0x6030 0000 0013 <op0:2> <op1:3> <crn:4> <crm:4> <op2:3> + 4.69 KVM_GET_ONE_REG Capability: KVM_CAP_ONE_REG @@ -2261,10 +2278,10 @@ return indicates the attribute is implemented. It does not necessarily indicate that the attribute can be read or written in the device's current state. "addr" is ignored. -4.77 KVM_ARM_VCPU_INIT +4.82 KVM_ARM_VCPU_INIT Capability: basic -Architectures: arm +Architectures: arm, arm64 Type: vcpu ioctl Parameters: struct struct kvm_vcpu_init (in) Returns: 0 on success; -1 on error @@ -2283,12 +2300,14 @@ should be created before this ioctl is invoked. Possible features: - KVM_ARM_VCPU_POWER_OFF: Starts the CPU in a power-off state. Depends on KVM_CAP_ARM_PSCI. + - KVM_ARM_VCPU_EL1_32BIT: Starts the CPU in a 32bit mode. + Depends on KVM_CAP_ARM_EL1_32BIT (arm64 only). -4.78 KVM_GET_REG_LIST +4.83 KVM_GET_REG_LIST Capability: basic -Architectures: arm +Architectures: arm, arm64 Type: vcpu ioctl Parameters: struct kvm_reg_list (in/out) Returns: 0 on success; -1 on error @@ -2305,10 +2324,10 @@ This ioctl returns the guest registers that are supported for the KVM_GET_ONE_REG/KVM_SET_ONE_REG calls. -4.80 KVM_ARM_SET_DEVICE_ADDR +4.84 KVM_ARM_SET_DEVICE_ADDR Capability: KVM_CAP_ARM_SET_DEVICE_ADDR -Architectures: arm +Architectures: arm, arm64 Type: vm ioctl Parameters: struct kvm_arm_device_address (in) Returns: 0 on success, -1 on error @@ -2329,20 +2348,21 @@ can access emulated or directly exposed devices, which the host kernel needs to know about. The id field is an architecture specific identifier for a specific device. -ARM divides the id field into two parts, a device id and an address type id -specific to the individual device. +ARM/arm64 divides the id field into two parts, a device id and an +address type id specific to the individual device. bits: | 63 ... 32 | 31 ... 16 | 15 ... 0 | field: | 0x00000000 | device id | addr type id | -ARM currently only require this when using the in-kernel GIC support for the -hardware VGIC features, using KVM_ARM_DEVICE_VGIC_V2 as the device id. When -setting the base address for the guest's mapping of the VGIC virtual CPU -and distributor interface, the ioctl must be called after calling -KVM_CREATE_IRQCHIP, but before calling KVM_RUN on any of the VCPUs. Calling -this ioctl twice for any of the base addresses will return -EEXIST. +ARM/arm64 currently only require this when using the in-kernel GIC +support for the hardware VGIC features, using KVM_ARM_DEVICE_VGIC_V2 +as the device id. When setting the base address for the guest's +mapping of the VGIC virtual CPU and distributor interface, the ioctl +must be called after calling KVM_CREATE_IRQCHIP, but before calling +KVM_RUN on any of the VCPUs. Calling this ioctl twice for any of the +base addresses will return -EEXIST. -4.82 KVM_PPC_RTAS_DEFINE_TOKEN +4.85 KVM_PPC_RTAS_DEFINE_TOKEN Capability: KVM_CAP_PPC_RTAS Architectures: ppc |