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[26/56] KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG

Message ID 20190503124427.190206-27-marc.zyngier@arm.com (mailing list archive)
State New, archived
Headers show
Series [GIT,PULL] KVM/arm updates for 5.2 | expand

Commit Message

Marc Zyngier May 3, 2019, 12:43 p.m. UTC 
From: Dave Martin <Dave.Martin@arm.com>

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>
---
 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 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