Re: [Qemu-devel] [RFC PATCH v2 12/12] spapr: Workaround for broken radix guests

2017-02-27 Thread David Gibson
On Thu, Feb 23, 2017 at 05:00:05PM +1100, Sam Bobroff wrote: > For a little while around 4.9, Linux kernels that saw the radix bit in > ibm,pa-features would attempt to set up the MMU as if they were a > hypervisor, even if they were a guest, which would cause them to > crash. > > Work around this

[Qemu-devel] [RFC PATCH v2 12/12] spapr: Workaround for broken radix guests

2017-02-22 Thread Sam Bobroff
For a little while around 4.9, Linux kernels that saw the radix bit in ibm,pa-features would attempt to set up the MMU as if they were a hypervisor, even if they were a guest, which would cause them to crash. Work around this by detecting pre-ISA 3.0 guests by their lack of that bit in option vect