[PATCH v13 12/35] KVM: Prepare for handling only shared mappings in mmu_notifier events

Paolo Bonzini pbonzini at redhat.com
Thu Nov 2 22:14:13 AEDT 2023

On 11/2/23 06:59, Binbin Wu wrote:
>> Add flags to "struct kvm_gfn_range" to let notifier events target
>> only shared and only private mappings, and write up the existing
>> mmu_notifier events to be shared-only (private memory is never
>> associated with a userspace virtual address, i.e. can't be reached
>> via mmu_notifiers).
>> Add two flags so that KVM can handle the three possibilities
>> (shared, private, and shared+private) without needing something
>> like a tri-state enum.
> I see the two flags are set/cleared in __kvm_handle_hva_range() in
> this patch and kvm_handle_gfn_range() from the later patch 13/35, but
> I didn't see they are used/read in this patch series if I didn't miss
> anything.  How are they supposed to be used in KVM?

They are going to be used by SNP/TDX patches.


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