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Commit 395f562f authored by Dave Martin's avatar Dave Martin Committed by Marc Zyngier
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KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG 



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: default avatarDave Martin <Dave.Martin@arm.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 555f3d03

Documentation/virtual/kvm/api.txt

+6 −0
Original line number Diff line number Diff line
@@ -1871,6 +1871,9 @@ Architectures: all 
Type: vcpu ioctl

Parameters: struct kvm_one_reg (in)

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 {

       __u64 id;
@@ -2192,6 +2195,9 @@ Architectures: all 
Type: vcpu ioctl

Parameters: struct kvm_one_reg (in and out)

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

in a vcpu. The register to read is indicated by the "id" field of the