diff options
| author | Tianyu Lan <tiala@microsoft.com> | 2023-08-18 06:29:12 -0400 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2023-08-22 00:38:20 +0000 |
| commit | 8387ce06d70bbbb97a0c168a52b68268ae0da075 (patch) | |
| tree | a4e0c65267595b475f3b9c9bb833775081acf1a6 /include/asm-generic | |
| parent | d6e2d652443751e290b2edb70173ec3c22f78fbe (diff) | |
| download | lwn-8387ce06d70bbbb97a0c168a52b68268ae0da075.tar.gz lwn-8387ce06d70bbbb97a0c168a52b68268ae0da075.zip | |
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
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/mshyperv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 580c766958de..efd0d2aedad3 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -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; |