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SubjectRe: [PATCH v10 10/16] KVM: x86: Introduce KVM_GET_SHARED_PAGES_LIST ioctl
On Thu, Feb 04, 2021, Ashish Kalra wrote:
> From: Brijesh Singh <brijesh.singh@amd.com>
>
> The ioctl is used to retrieve a guest's shared pages list.

What's the performance hit to boot time if KVM_HC_PAGE_ENC_STATUS is passed
through to userspace? That way, userspace could manage the set of pages in
whatever data structure they want, and these get/set ioctls go away.

Also, aren't there plans for an in-guest migration helper? If so, do we have
any idea what that interface will look like? E.g. if we're going to end up with
a full fledged driver in the guest, why not bite the bullet now and bypass KVM
entirely?

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