summaryrefslogtreecommitdiffstats
path: root/Documentation/virtual/kvm
diff options
context:
space:
mode:
authorDave Martin <Dave.Martin@arm.com>2019-04-12 13:28:05 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2019-04-18 17:14:02 +0100
commit9df2d660c7f37aed7244ec0b920c0749dbb69167 (patch)
tree7636369b59ea8097072a7a34e626bfd3a7dc2edb /Documentation/virtual/kvm
parent92e68b2b1ba004be55b2094fb8b5c11d0b24d11d (diff)
downloadlinux-9df2d660c7f37aed7244ec0b920c0749dbb69167.tar.gz
linux-9df2d660c7f37aed7244ec0b920c0749dbb69167.tar.bz2
linux-9df2d660c7f37aed7244ec0b920c0749dbb69167.zip
KVM: Clarify capability requirements for KVM_ARM_VCPU_FINALIZE
Userspace is only supposed to use KVM_ARM_VCPU_FINALIZE when there is some vcpu feature that can actually be finalized. This means that documenting KVM_ARM_VCPU_FINALIZE as available or not depending on the capabilities present is not helpful. This patch amends the documentation to describe availability in terms of which capability is required for each finalizable feature instead. In any case, userspace sees the same error (EINVAL) regardless of whether the given feature is not present or KVM_ARM_VCPU_FINALIZE is not implemented at all. No functional change. Suggested-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'Documentation/virtual/kvm')
-rw-r--r--Documentation/virtual/kvm/api.txt5
1 files changed, 2 insertions, 3 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 03df379a02b0..5519df0d3ed0 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -3999,17 +3999,16 @@ userspace should not expect to get any particular value there.
4.119 KVM_ARM_VCPU_FINALIZE
-Capability: KVM_CAP_ARM_SVE
Architectures: arm, arm64
Type: vcpu ioctl
Parameters: int feature (in)
Returns: 0 on success, -1 on error
Errors:
EPERM: feature not enabled, needs configuration, or already finalized
- EINVAL: unknown feature
+ EINVAL: feature unknown or not present
Recognised values for feature:
- arm64 KVM_ARM_VCPU_SVE
+ arm64 KVM_ARM_VCPU_SVE (requires KVM_CAP_ARM_SVE)
Finalizes the configuration of the specified vcpu feature.