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

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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
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4
include/linux/hyperv.h
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@@ -665,8 +665,8 @@ struct vmbus_channel_initiate_contact {
u64 interrupt_page;
struct {
u8 msg_sint;
u8 padding1[3];
u32 padding2;
u8 msg_vtl;
u8 reserved[6];
};
};
u64 monitor_page1;