Messages in this thread | | | Date | Wed, 18 May 2022 14:18:27 +0000 | From | Sean Christopherson <> | Subject | Re: [PATCH v3 04/34] KVM: x86: hyper-v: Handle HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} calls gently |
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On Wed, May 18, 2022, Vitaly Kuznetsov wrote: > Maxim Levitsky <mlevitsk@redhat.com> writes: > > Or if using kfifo, then it can contain plain u64 items, which is even more natural. > > > > In the next version I switch to fifo and get rid of 'flush_all' entries > but instead of a boolean I use a 'magic' value of '-1' in GVA. This way > we don't need to synchronize with the reader and add any special > handling for the flag.
Isn't -1 theoretically possible? Or is wrapping not allowed? E.g. requesting a flush for address=0xfffffffffffff000, count = 0xfff will yield -1 and doesn't create any illegal addresses in the process.
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