Messages in this thread | | | From | Vitaly Kuznetsov <> | Subject | Re: [PATCH 0/3] KVM: x86: KVM_MEM_PCI_HOLE memory | Date | Thu, 06 Aug 2020 13:39:09 +0200 |
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"Michael S. Tsirkin" <mst@redhat.com> writes:
> About the feature bit, I am not sure why it's really needed. A single > mmio access is cheaper than two io accesses anyway, right? So it makes > sense for a kvm guest whether host has this feature or not. > We need to be careful and limit to a specific QEMU implementation > to avoid tripping up bugs, but it seems more appropriate to > check it using pci host IDs.
Right, it's just that "running on KVM" is too coarse grained, we just need a way to somehow distinguish between "known/good" and "unknown/buggy" configurations.
-- Vitaly
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