diff mbox series

[v4,24/25] KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG

Message ID 1547757219-19439-25-git-send-email-Dave.Martin@arm.com
State New
Headers show
Series None | expand

Commit Message

Dave Martin Jan. 17, 2019, 8:33 p.m. UTC 
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>
---
 Documentation/virtual/kvm/api.txt | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 097b8ba..cb15f2a 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1854,6 +1854,9 @@  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;
@@ -2175,6 +2178,9 @@  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