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KVM: Add documentation for KVM_ARM_PREFERRED_TARGET ioctl

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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>
This commit is contained in:
Anup Patel 2013-09-30 14:20:08 +05:30 committed by Christoffer Dall
parent 42c4e0c77a
commit 740edfc0a3
1 changed files with 27 additions and 4 deletions
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31
Documentation/virtual/kvm/api.txt
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@ -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