On 29/08/2019 14.47, Cornelia Huck wrote: > Explicitly specify the valid ranges for size and ar, and reword > buf requirements a bit. > > Signed-off-by: Cornelia Huck <coh...@redhat.com> > --- > supposed to go on top of "KVM: s390: Test for bad access register and > size at the start of S390_MEM_OP" (<20190829122517.31042-1-th...@redhat.com>) > --- > Documentation/virt/kvm/api.txt | 14 ++++++++------ > 1 file changed, 8 insertions(+), 6 deletions(-) > > diff --git a/Documentation/virt/kvm/api.txt b/Documentation/virt/kvm/api.txt > index 2d067767b617..76c9d6fdbfdb 100644 > --- a/Documentation/virt/kvm/api.txt > +++ b/Documentation/virt/kvm/api.txt > @@ -3079,12 +3079,14 @@ This exception is also raised directly at the > corresponding VCPU if the > flag KVM_S390_MEMOP_F_INJECT_EXCEPTION is set in the "flags" field. > > The start address of the memory region has to be specified in the "gaddr" > -field, and the length of the region in the "size" field. "buf" is the buffer > -supplied by the userspace application where the read data should be written > -to for KVM_S390_MEMOP_LOGICAL_READ, or where the data that should be written > -is stored for a KVM_S390_MEMOP_LOGICAL_WRITE. "buf" is unused and can be NULL > -when KVM_S390_MEMOP_F_CHECK_ONLY is specified. "ar" designates the access > -register number to be used. > +field, and the length of the region in the "size" field (which must not > +be 0). The maximum value for "size" can be obtained by checking the > +KVM_CAP_S390_MEM_OP capability. "buf" is the buffer supplied by the > +userspace application where the read data should be written to for > +KVM_S390_MEMOP_LOGICAL_READ, or where the data that should be written is > +stored for a KVM_S390_MEMOP_LOGICAL_WRITE. When KVM_S390_MEMOP_F_CHECK_ONLY > +is specified, "buf" is unused and can be NULL. "ar" designates the access > +register number to be used; the valid range is 0..15. > > The "reserved" field is meant for future extensions. It is not used by > KVM with the currently defined set of flags. >
Reviewed-by: Thomas Huth <th...@redhat.com>
