Benjamin Herrenschmidt <b...@kernel.crashing.org> writes: > On Mon, 2016-09-12 at 11:18 +0530, Nikunj A Dadhania wrote: >> PowerPC targets should do tlb invalidation on other cpus on >> instructions that expect a global effect. >> >> * ptesync for BookS >> * tlbsync primarily for BookE >> (for BookS make it a nop, as it always come along with ptesync) >> * tlbivax for other ppc tragets >> * H_REMOVE, H_BULK_REMOVE and H_PROTECT hcalls in case of pseries > > The above is confusing. > > The instructions that have global effects are tlbie (BookS) and tlbivax > (BookE) plus the H_CALLs since they contain a tlbie on a real > hypervisor. > > The ptesync and tlbsync instructions are barriers use to synchronize > with the global invalidations. That means that we don't need to ensure > the global invalidations have completed until we hit those barriers. > > We typically use them as a way to "batch" the invalidations in TCG.
Sure, will updated. I mixed up the delayed flush with instructions. Regards Nikunj
