On Fri, Apr 16, 2021 at 06:40:53PM +0300, Kirill A. Shutemov wrote: > TDX integrity check failures may lead to system shutdown host kernel must > not allow any writes to TD-private memory. This requirment clashes with > KVM design: KVM expects the guest memory to be mapped into host userspace > (e.g. QEMU). > > This patchset aims to start discussion on how we can approach the issue. > > The core of the change is in the last patch. Please see more detailed > description of the issue and proposoal of the solution there. This seems to have some parallels with s390's arch_make_page_accessible(). Is there any chance to combine the two, so we don't end up with duplicated hooks all over the MM for this kind of thing? https://patchwork.kernel.org/project/kvm/cover/20200214222658.12946-1-borntraeger@xxxxxxxxxx/ and recent THP/Folio-related discussion: https://lore.kernel.org/linux-mm/20210409194059.GW2531743@xxxxxxxxxxxxxxxxxxxx/
