linux-kernel - [PATCH hyperv-next v6 05/11] arm64: hyperv: Initialize the Virtual Trust Level field

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Message-ID: <20250315001931.631210-6-romank@linux.microsoft.com>
Date: Fri, 14 Mar 2025 17:19:25 -0700
From: Roman Kisel <romank@...ux.microsoft.com>
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Subject: [PATCH hyperv-next v6 05/11] arm64: hyperv: Initialize the Virtual Trust Level field

Various parts of the hyperv code need to know what VTL
the kernel runs at, most notably VMBus needs that to
establish communication with the host.

Initialize the Virtual Trust Level field to enable
booting in the Virtual Trust Level.

Signed-off-by: Roman Kisel <romank@...ux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@...look.com>
---
 arch/arm64/hyperv/mshyperv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
index c5b03d3af7c5..f251a08ada5b 100644
--- a/arch/arm64/hyperv/mshyperv.c
+++ b/arch/arm64/hyperv/mshyperv.c
@@ -109,6 +109,7 @@ static int __init hyperv_init(void)
 
 	if (ms_hyperv.priv_high & HV_ACCESS_PARTITION_ID)
 		hv_get_partition_id();
+	ms_hyperv.vtl = get_vtl();
 
 	ms_hyperv_late_init();
 
-- 
2.43.0