On Tue, Aug 01, 2023 at 07:26:29PM -0300, Daniel Henrique Barboza wrote: > The EBUSY errno is being used for KVM_SET_ONE_REG as a way to tell > userspace that a given reg can't be written after the vcpu started. > > Signed-off-by: Daniel Henrique Barboza <dbarboza@xxxxxxxxxxxxxxxx> > --- > Documentation/virt/kvm/api.rst | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst > index c0ddd3035462..229e7cc091c8 100644 > --- a/Documentation/virt/kvm/api.rst > +++ b/Documentation/virt/kvm/api.rst > @@ -2259,6 +2259,8 @@ Errors: > EINVAL invalid register ID, or no such register or used with VMs in > protected virtualization mode on s390 > EPERM (arm64) register access not allowed before vcpu finalization > + EBUSY (riscv) register access not allowed after the vcpu has run > + at least once We allow access (reading, even before, and now also writing when the value is the same), so this should be worded in a way that conveys the register may not be changed after the vcpu has run once. Thanks, drew
