To implement CPU=Host we have added KVM_ARM_PREFERRED_TARGET vm ioctl which provides information to user space required for creating VCPU matching underlying Host.
This patch adds info related to this new KVM_ARM_PREFERRED_TARGET vm ioctl in the KVM API documentation.
Signed-off-by: Anup Patel anup.patel@linaro.org Signed-off-by: Pranavkumar Sawargaonkar pranavkumar@linaro.org --- Documentation/virtual/kvm/api.txt | 31 +++++++++++++++++++++++++++---- 1 file changed, 27 insertions(+), 4 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 858aecf..076b849 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2304,7 +2304,31 @@ Possible features: Depends on KVM_CAP_ARM_EL1_32BIT (arm64 only).
-4.83 KVM_GET_REG_LIST +4.83 KVM_ARM_PREFERRED_TARGET + +Capability: basic +Architectures: arm, arm64 +Type: vm ioctl +Parameters: struct struct kvm_vcpu_init (out) +Returns: 0 on success; -1 on error +Errors: + ENODEV: no preferred target available for the host + +This queries KVM for preferred CPU target type which can be emulated +by KVM on underlying host. + +The ioctl returns struct kvm_vcpu_init instance containing information +about preferred CPU target type and recommended features for it. The +kvm_vcpu_init->features bitmap returned will have feature bits set if +the preferred target recommends setting these features, but this is +not mandatory. + +The information returned by this ioctl can be used to prepare an instance +of struct kvm_vcpu_init for KVM_ARM_VCPU_INIT ioctl which will result in +in VCPU matching underlying host. + + +4.84 KVM_GET_REG_LIST
Capability: basic Architectures: arm, arm64 @@ -2323,8 +2347,7 @@ struct kvm_reg_list { This ioctl returns the guest registers that are supported for the KVM_GET_ONE_REG/KVM_SET_ONE_REG calls.
- -4.84 KVM_ARM_SET_DEVICE_ADDR +4.85 KVM_ARM_SET_DEVICE_ADDR
Capability: KVM_CAP_ARM_SET_DEVICE_ADDR Architectures: arm, arm64 @@ -2362,7 +2385,7 @@ 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.
-4.85 KVM_PPC_RTAS_DEFINE_TOKEN +4.86 KVM_PPC_RTAS_DEFINE_TOKEN
Capability: KVM_CAP_PPC_RTAS Architectures: ppc