linux-kernel - [PATCH hyperv-next v7 05/11] arm64: hyperv: Initialize the Virtual Trust Level field

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Message-ID: <20250407201336.66913-6-romank@linux.microsoft.com>
Date: Mon,  7 Apr 2025 13:13:30 -0700
From: Roman Kisel <romank@...ux.microsoft.com>
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Subject: [PATCH hyperv-next v7 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 21458b6338aa..43f422a7ef34 100644
--- a/arch/arm64/hyperv/mshyperv.c
+++ b/arch/arm64/hyperv/mshyperv.c
@@ -117,6 +117,7 @@ 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