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Drivers: hv: Provide arch-neutral implementation of get_vtl()

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To run in the VTL mode, Hyper-V drivers have to know what
VTL the system boots in, and the arm64/hyperv code does not
have the means to compute that.

Refactor the code to hoist the function that detects VTL,
make it arch-neutral to be able to employ it to get the VTL
on arm64.

Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Tianyu Lan <tiala@microsoft.com>
Link: https://lore.kernel.org/r/20250428210742.435282-5-romank@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250428210742.435282-5-romank@linux.microsoft.com>
This commit is contained in:
Roman Kisel
2025-04-28 14:07:35 -07:00
committed by Wei Liu
parent f41ceff174
commit e7e6902fbd
4 changed files with 38 additions and 35 deletions
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2
include/hyperv/hvgdk_mini.h
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@@ -1228,7 +1228,7 @@ struct hv_send_ipi { /* HV_INPUT_SEND_SYNTHETIC_CLUSTER_IPI */
u64 cpu_mask;
} __packed;
#define HV_X64_VTL_MASK GENMASK(3, 0)
#define HV_VTL_MASK GENMASK(3, 0)
/* Hyper-V memory host visibility */
enum hv_mem_host_visibility {