# Re: \[PATCH v2 04/12\] powerpc/pseries/svm: Add a powerpc version of prot\_guest\_has()

- From: Tom Lendacky \<thomas.lendacky@amd.com\>
- Date: 2021-08-17 14:12:06 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/08/212587
- Thread: https://ratatoskr.run/linuxppc-dev/2021/08/212359/t.md

```text
On 8/17/21 3:35 AM, Borislav Petkov wrote:
> On Fri, Aug 13, 2021 at 11:59:23AM -0500, Tom Lendacky wrote:
>> Introduce a powerpc version of the prot_guest_has() function. This will
>> be used to replace the powerpc mem_encrypt_active() implementation, so
>> the implementation will initially only support the PATTR_MEM_ENCRYPT
>> attribute.
>>
>> Cc: Michael Ellerman <mpe@ellerman.id.au>
>> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>> Cc: Paul Mackerras <redacted>
>> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
>> ---
>>  arch/powerpc/include/asm/protected_guest.h | 30 ++++++++++++++++++++++
>>  arch/powerpc/platforms/pseries/Kconfig     |  1 +
>>  2 files changed, 31 insertions(+)
>>  create mode 100644 arch/powerpc/include/asm/protected_guest.h
>>
>> diff --git a/arch/powerpc/include/asm/protected_guest.h b/arch/powerpc/include/asm/protected_guest.h
>> new file mode 100644
>> index 000000000000..ce55c2c7e534
>> --- /dev/null
>> +++ b/arch/powerpc/include/asm/protected_guest.h
>> @@ -0,0 +1,30 @@
>> +/* SPDX-License-Identifier: GPL-2.0-only */
>> +/*
>> + * Protected Guest (and Host) Capability checks
>> + *
>> + * Copyright (C) 2021 Advanced Micro Devices, Inc.
>> + *
>> + * Author: Tom Lendacky [ref]
>> + */
>> +
>> +#ifndef _POWERPC_PROTECTED_GUEST_H
>> +#define _POWERPC_PROTECTED_GUEST_H
>> +
>> +#include <asm/svm.h>
>> +
>> +#ifndef __ASSEMBLY__
> 
> Same thing here. Pls audit the whole set whether those __ASSEMBLY__
> guards are really needed and remove them if not.

Will do.

Thanks,
Tom

> 
> Thx.
> 
```