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KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG

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KVM_GET_ONE_REG and KVM_SET_ONE_REG return some error codes that
are not documented (but hopefully not surprising either).  To give
an indication of what these may mean, this patch adds brief
documentation.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Dave Martin 2019-01-15 17:02:08 +00:00 committed by Marc Zyngier
parent 555f3d03e7
commit 395f562f2b
1 changed files with 6 additions and 0 deletions
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6
Documentation/virtual/kvm/api.txt
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@ -1871,6 +1871,9 @@ Architectures: all
Type: vcpu ioctl Type: vcpu ioctl
Parameters: struct kvm_one_reg (in) Parameters: struct kvm_one_reg (in)
Returns: 0 on success, negative value on failure Returns: 0 on success, negative value on failure
Errors:
 ENOENT:   no such register
 EINVAL:   other errors, such as bad size encoding for a known register
struct kvm_one_reg { struct kvm_one_reg {
__u64 id; __u64 id;
@ -2192,6 +2195,9 @@ Architectures: all
Type: vcpu ioctl Type: vcpu ioctl
Parameters: struct kvm_one_reg (in and out) Parameters: struct kvm_one_reg (in and out)
Returns: 0 on success, negative value on failure Returns: 0 on success, negative value on failure
Errors:
 ENOENT:   no such register
 EINVAL:   other errors, such as bad size encoding for a known register
This ioctl allows to receive the value of a single register implemented This ioctl allows to receive the value of a single register implemented
in a vcpu. The register to read is indicated by the "id" field of the in a vcpu. The register to read is indicated by the "id" field of the