Messages in this thread | | | Date | Tue, 7 Feb 2023 16:55:59 +0100 | Subject | Re: [PATCH v7 13/14] Documentation: KVM: s390: Describe KVM_S390_MEMOP_F_CMPXCHG | From | Janosch Frank <> |
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On 2/6/23 17:46, Janis Schoetterl-Glausch wrote: > Describe the semantics of the new KVM_S390_MEMOP_F_CMPXCHG flag for > absolute vm write memops which allows user space to perform (storage key > checked) cmpxchg operations on guest memory. > > Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com> > --- > Documentation/virt/kvm/api.rst | 29 ++++++++++++++++++++++++++--- > 1 file changed, 26 insertions(+), 3 deletions(-) > > diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst > index 0a67cb738013..d09d7223c2a6 100644 > --- a/Documentation/virt/kvm/api.rst > +++ b/Documentation/virt/kvm/api.rst > @@ -3736,7 +3736,8 @@ The fields in each entry are defined as follows: > :Parameters: struct kvm_s390_mem_op (in) > :Returns: = 0 on success, > < 0 on generic error (e.g. -EFAULT or -ENOMEM), > - > 0 if an exception occurred while walking the page tables > + 16 bit program exception code if the access causes such an exception, > + other code > 0xffff with special meaning. >
The 0xffff part is rebase damage from an old patch, I've discussed it off list and will remove that line when picking since I see no other reason for a re-spin.
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
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