Re: [PATCH v8 12/18] KVM: SVM: Add support for static allocation of unified Page Encryption Bitmap.

Paolo Bonzini
2020-12-06T10:20:54Z

On 04/12/20 22:38, Ashish Kalra wrote:
> Earlier we used to dynamic resizing of the page encryption bitmap based
> on the guest hypercall, but potentially a malicious guest can make a hypercall
> which can trigger a really large memory allocation on the host side and may
> eventually cause denial of service.
>
> Hence now we don't do dynamic resizing of the page encryption bitmap as
> per the hypercall and allocate it statically based on guest memory
> allocation by walking through memslots and computing it's size.
>
> I will add the above comment to the fresh series of the patch-set i am
> going to post.

Sounds good, thanks. If there are no other changes I can include this
in the commit message myself.

Paolo