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Re: [Xen-devel] [PATCH] x86: correct assertion in destroy_perdomain_mapping()

On 20/04/18 16:03, Jan Beulich wrote:
> hvm_domain_initialise() may call this with nr being zero, which triggers
> the "does not cross L3 boundary" check.
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Is this the correct fix?

Its unclear what the call to create_perdomain_mapping() is doing, but it
is the sole caller which passes 0.

I presume it is to allocate d->arch.perdomain_l3_pg but
destroy_perdomain_mapping() doesn't free this page, so I've got no idea
what the destroy call is trying to achieve.


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