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| author | Dave Martin <Dave.Martin@arm.com> | 2019-01-15 18:02:08 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2019-03-29 15:41:55 +0100 |
| commit | 395f562f2b4cf9aef0db540d460b859fcde110b6 (patch) | |
| tree | 2c07cbd022b54c80bf22f2787dc622364b206ff5 | |
| parent | KVM: arm64: Add a capability to advertise SVE support (diff) | |
| download | linux-395f562f2b4cf9aef0db540d460b859fcde110b6.tar.xz linux-395f562f2b4cf9aef0db540d460b859fcde110b6.zip | |
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>
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 6 |
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 |