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| author | Kirill A. Shutemov <[email protected]> | 2022-04-06 02:29:35 +0300 |
|---|---|---|
| committer | Dave Hansen <[email protected]> | 2022-04-07 08:27:53 -0700 |
| commit | 7dbde7631629896b478bc5b1f4c3e52e6d518d12 (patch) | |
| tree | 1a7903f059095b77b8026e49d648e84d34310481 /lib/mpi/mpi-sub-ui.c | |
| parent | 9aa6ea69852c46e551f4180dce4208bd53df418c (diff) | |
x86/mm/cpa: Add support for TDX shared memory
Intel TDX protects guest memory from VMM access. Any memory that is
required for communication with the VMM must be explicitly shared.
It is a two-step process: the guest sets the shared bit in the page
table entry and notifies VMM about the change. The notification happens
using MapGPA hypercall.
Conversion back to private memory requires clearing the shared bit,
notifying VMM with MapGPA hypercall following with accepting the memory
with AcceptPage hypercall.
Provide a TDX version of x86_platform.guest.* callbacks. It makes
__set_memory_enc_pgtable() work right in TDX guest.
Signed-off-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'lib/mpi/mpi-sub-ui.c')
0 files changed, 0 insertions, 0 deletions