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authorDave Martin <Dave.Martin@arm.com>2019-01-15 17:02:08 +0000
committerMarc Zyngier <marc.zyngier@arm.com>2019-03-29 14:41:55 +0000
commit395f562f2b4cf9aef0db540d460b859fcde110b6 (patch)
tree2c07cbd022b54c80bf22f2787dc622364b206ff5 /Documentation
parent555f3d03e7fb43a539050aee91337978da14a25e (diff)
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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: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/virtual/kvm/api.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 2d4f7ce5e967..cd920dd1195c 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -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