On 28.10.2011, at 03:56, David Gibson wrote: > Sufficiently recent kernels include a KVM call to accelerate use of > PAPR TCE tables (IOMMU), which are used by PAPR virtual IO devices. > This involves qemu mapping the TCE table in from a kernel obtained fd, > which currently we do with PROT_READ only. This is a hangover from > early (never released) versions of this kernel interface which only > permitted read-only mappings and required us to destroy and recreate > the table when we needed to clear it from qemu. > > Now, the kernel permits read-write mappings, and we rely on this to > clear the table in spapr_vio_quiesce_one(). However, due to > insufficient testing, I forgot to update the actual mapping of the > table in kvmppc_create_spapr_tce() to add PROT_WRITE to the mmap(). > > This patch corrects the oversight. > > Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
Thanks, applied to ppc-next. Alex
