On Fri, 2023-09-22 at 15:00 +0000, Paul Durrant wrote: > From: Paul Durrant <pdurrant@xxxxxxxxxx> > > The shared_info page is not guest memory as such. It is a dedicated page > allocated by the VMM and overlaid onto guest memory in a GFN chosen by the > guest. The guest may even request that shared_info be moved from one GFN > to another, but the HVA is never going to change. Thus it makes much more > sense to map the shared_info page in kernel once using this fixed HVA. The words "makes much more sense" are doing a *lot* of work there. :) When heckling the cover letter in https://lore.kernel.org/kvm/d13e459e221f28fb1865eedea023e583a2277ab1.camel@xxxxxxxxxxxxx/ I suggested that the explanation probably wants to make it into a commit message rather than just the cover letter which tends not to be preserved in the commit history. It's *this* commit which needs it, I think.
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