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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [RFC] xen/arm: Handling cache maintenance instructions by set/way
>>> On 07.12.17 at 15:53, <marc.zyngier@xxxxxxx> wrote: > On 07/12/17 13:52, Julien Grall wrote: > There is exactly one case where set/way makes sense, and that's when > you're the only CPU left in the system, your MMU is off, and you're > about to go down. With this and ... > On top of bypassing the coherency, S/W CMOs do not prevent lines from > migrating from one CPU to another. So you could happily be flushing by > S/W, and still end up with dirty lines in your cache. Success! ... this I wonder what value emulating those insns then has in the first place. Can't you as well simply skip and ignore them, with the same (bad) result? Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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