Re: [Qemu-devel] [PATCH v2 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-23 Thread Cornelia Huck
On Wed, 23 May 2018 00:16:54 +0200 Halil Pasic wrote: > There is at least one guest (OS) such that although it does not rely on > the guarantees provided by ORB 1 word 9 bit (aka unlimited prefetch, aka > P bit) not being set, it fails to tell this to the machine. > > Usually this ain't a big de

[Qemu-devel] [PATCH v2 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-22 Thread Halil Pasic
There is at least one guest (OS) such that although it does not rely on the guarantees provided by ORB 1 word 9 bit (aka unlimited prefetch, aka P bit) not being set, it fails to tell this to the machine. Usually this ain't a big deal, as the original purpose of the P bit is to allow for performan