From 8387ce06d70bbbb97a0c168a52b68268ae0da075 Mon Sep 17 00:00:00 2001 From: Tianyu Lan Date: Fri, 18 Aug 2023 06:29:12 -0400 Subject: 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 Reviewed-by: Michael Kelley Signed-off-by: Tianyu Lan Signed-off-by: Wei Liu Link: https://lore.kernel.org/r/20230818102919.1318039-3-ltykernel@gmail.com --- drivers/hv/connection.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/hv') diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c index 5978e9dbc286..02b54f85dc60 100644 --- a/drivers/hv/connection.c +++ b/drivers/hv/connection.c @@ -98,6 +98,7 @@ int vmbus_negotiate_version(struct vmbus_channel_msginfo *msginfo, u32 version) */ if (version >= VERSION_WIN10_V5) { msg->msg_sint = VMBUS_MESSAGE_SINT; + msg->msg_vtl = ms_hyperv.vtl; vmbus_connection.msg_conn_id = VMBUS_MESSAGE_CONNECTION_ID_4; } else { msg->interrupt_page = virt_to_phys(vmbus_connection.int_page); -- cgit v1.2.3