From 395f562f2b4cf9aef0db540d460b859fcde110b6 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Tue, 15 Jan 2019 17:02:08 +0000 Subject: [PATCH] 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 Signed-off-by: Marc Zyngier --- Documentation/virtual/kvm/api.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 2d4f7ce..cd920dd 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 -- 2.7.4