Re: [PATCH kernel 2/3] powerpc/pseries: Allow not having ibm,hypertas-functions::hcall-multi-tce for DDW

2019-12-13 Thread Ram Pai
On Fri, Dec 13, 2019 at 07:45:36PM +1100, Alexey Kardashevskiy wrote: > By default a pseries guest supports a H_PUT_TCE hypercall which maps > a single IOMMU page in a DMA window. Additionally the hypervisor may > support H_PUT_TCE_INDIRECT/H_STUFF_TCE which update multiple TCEs at once; > this is

[PATCH kernel 2/3] powerpc/pseries: Allow not having ibm, hypertas-functions::hcall-multi-tce for DDW

2019-12-13 Thread Alexey Kardashevskiy
By default a pseries guest supports a H_PUT_TCE hypercall which maps a single IOMMU page in a DMA window. Additionally the hypervisor may support H_PUT_TCE_INDIRECT/H_STUFF_TCE which update multiple TCEs at once; this is advertised via the device tree /rtas/ibm,hypertas-functions property which