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| author | Anup Patel <anup.patel@linaro.org> | 2013-09-30 14:20:08 +0530 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2013-10-02 11:29:49 -0700 |
| commit | 740edfc0a35dd688c97ae8907c4377df49219bf3 (patch) | |
| tree | 5349197e44335ce4dd8bbf44e8029cf87c188728 /Documentation/virtual | |
| parent | 42c4e0c77ac91505ab94284b14025e3a0865c0a5 (diff) | |
| download | linux-stable-740edfc0a35dd688c97ae8907c4377df49219bf3.tar.gz linux-stable-740edfc0a35dd688c97ae8907c4377df49219bf3.tar.bz2 linux-stable-740edfc0a35dd688c97ae8907c4377df49219bf3.zip | |
KVM: Add documentation for KVM_ARM_PREFERRED_TARGET ioctl
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>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 858aecf21db2..076b8492d810 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 |