Re: [PATCH Part2 RFC v4 00/40] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support

On 7/7/21 11:35 AM, Brijesh Singh wrote:

Changes since v3:
 * Add support for extended guest message request.
 * Add ioctl to query the SNP Platform status.
 * Add ioctl to get and set the SNP config.
 * Add check to verify that memory reserved for the RMP covers the full system RAM.
 * Start the SNP specific commands from 256 instead of 255.
 * Multiple cleanup and fixes based on the review feedback.

Changes since v2:
 * Add AP creation support.
 * Drop the patch to handle the RMP fault for the kernel address.
 * Add functions to track the write access from the hypervisor.
 * Do not enable the SNP feature when IOMMU is disabled or is in passthrough mode.
 * Dump the RMP entry on RMP violation for the debug.
 * Shorten the GHCB macro names.
 * Start the SNP_INIT command id from 255 to give some gap for the legacy SEV.
 * Sync the header with the latest 0.9 SNP spec.

What happened to the THP splitting on RMP violations?