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docs: kvm: riscv: document EBUSY in KVM_SET_ONE_REG

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The EBUSY errno is being used for KVM_SET_ONE_REG as a way to tell
userspace that a given reg can't be changed after the vcpu started.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Daniel Henrique Barboza 2023-08-03 13:33:02 -03:00 committed by Anup Patel
parent 1deaf754f5
commit e47f3c2843
1 changed files with 2 additions and 0 deletions
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Documentation/virt/kvm/api.rst
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@ -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) changing register value not allowed after the vcpu
has run at least once
====== ============================================================
(These error codes are indicative only: do not rely on a specific error