x86/hyperv: Set Virtual Trust Level in VMBus init message

SEV-SNP guests on Hyper-V can run at multiple Virtual Trust
Levels (VTL).  During boot, get the VTL at which we're running
using the GET_VP_REGISTERs hypercall, and save the value
for future use.  Then during VMBus initialization, set the VTL
with the saved value as required in the VMBus init message.

Reviewed-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/20230818102919.1318039-3-ltykernel@gmail.com

This commit is contained in:

Tianyu Lan

2023-08-18 06:29:12 -04:00

committed by

Wei Liu

parent d6e2d65244

commit 8387ce06d7

5 changed files with 45 additions and 2 deletions

									
										include/asm-generic/mshyperv.h
									
		+1
		
												View File
												
				@@ -54,6 +54,7 @@ struct ms_hyperv_info {

						};

					};

					u64 shared_gpa_boundary;

					u8 vtl;

				};

				extern struct ms_hyperv_info ms_hyperv;

				extern bool hv_nested;