Drivers: hv: Enable VTL mode for arm64

Kconfig dependencies for arm64 guests on Hyper-V require that be
ACPI enabled, and limit VTL mode to x86/x64. To enable VTL mode
on arm64 as well, update the dependencies. Since VTL mode requires
DeviceTree instead of ACPI, don’t require arm64 guests on Hyper-V
to have ACPI unconditionally.

Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/20250428210742.435282-4-romank@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250428210742.435282-4-romank@linux.microsoft.com>

diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 6c1416167bd2efd3da175f4ad5f4168a5d09e954..eefa0b559b73a42e8a91411c00c75584ce3bf238 100644 (file)
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -5,7 +5,7 @@ menu "Microsoft Hyper-V guest support"
 config HYPERV
        tristate "Microsoft Hyper-V client drivers"
        depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \
-               || (ACPI && ARM64 && !CPU_BIG_ENDIAN)
+               || (ARM64 && !CPU_BIG_ENDIAN)
        select PARAVIRT
        select X86_HV_CALLBACK_VECTOR if X86
        select OF_EARLY_FLATTREE if OF
@@ -15,7 +15,7 @@ config HYPERV
 
 config HYPERV_VTL_MODE
        bool "Enable Linux to boot in VTL context"
-       depends on X86_64 && HYPERV
+       depends on (X86_64 || ARM64) && HYPERV
        depends on SMP
        default n
        help
@@ -31,7 +31,7 @@ config HYPERV_VTL_MODE
 
          Select this option to build a Linux kernel to run at a VTL other than
          the normal VTL0, which currently is only VTL2.  This option
-         initializes the x86 platform for VTL2, and adds the ability to boot
+         initializes the kernel to run in VTL2, and adds the ability to boot
          secondary CPUs directly into 64-bit context as required for VTLs other
          than 0.  A kernel built with this option must run at VTL2, and will
          not run as a normal guest.