Re: [PATCH 1/4] x86/hyperv: Add missing ARCH_HAS_CC_PLATFORM dependency

[Tianyu Lan]

On 2/23/2022 6:41 PM, Borislav Petkov wrote:
> On Wed, Feb 23, 2022 at 03:04:41PM +0800, Tianyu Lan wrote:
> >        Current Hyper-V Isolation VM requires AMD_MEM_ENCRYPT option which
>
> Where is that isolation VM option? Out of tree?
>
> Because
>
> $ git grep AMD_MEM_ENCRYPT | grep Kconfig
> arch/x86/Kconfig:1540:config AMD_MEM_ENCRYPT
> arch/x86/Kconfig:1553:config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT
> arch/x86/Kconfig:1555:  depends on AMD_MEM_ENCRYPT
>
> and those ain't it.

Hyper-V code check cpuid during runtime and there is no Hyper-V
isolation VM option.