From: Roman Kisel <rom...@linux.microsoft.com> Sent: Friday, July 26, 2024 3:59 PM > > 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. > > Signed-off-by: Roman Kisel <rom...@linux.microsoft.com> > --- > drivers/hv/Kconfig | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig > index 862c47b191af..a5cd1365e248 100644 > --- 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 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. > -- > 2.34.1 >
In v2 of this patch, I suggested [1] making a couple additional minor changes so that kernels built *without* HYPER_VTL_MODE would still require ACPI. Did that suggestion not work out? If that's the case, I'm curious about what goes wrong. Michael [1] https://lore.kernel.org/all/sn6pr02mb4157e15efe263bba3d8dfc51d4...@sn6pr02mb4157.namprd02.prod.outlook.com/
