linux-kernel - Re: [PATCH v2 09/14] arm64: Enable memory encrypt for Realms

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Message-ID: <c3424195-6d9b-4d15-b5c0-f4ef1fdbf160@arm.com>
Date: Thu, 25 Apr 2024 16:52:54 +0100
From: Steven Price <steven.price@....com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
 kernel test robot <lkp@...el.com>, kvm@...r.kernel.org,
 kvmarm@...ts.linux.dev
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
 Catalin Marinas <catalin.marinas@....com>, Marc Zyngier <maz@...nel.org>,
 Will Deacon <will@...nel.org>, James Morse <james.morse@....com>,
 Oliver Upton <oliver.upton@...ux.dev>, Zenghui Yu <yuzenghui@...wei.com>,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Joey Gouly <joey.gouly@....com>, Alexandru Elisei
 <alexandru.elisei@....com>, Christoffer Dall <christoffer.dall@....com>,
 Fuad Tabba <tabba@...gle.com>, linux-coco@...ts.linux.dev,
 Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
 Emanuele.Rocca@....com
Subject: Re: [PATCH v2 09/14] arm64: Enable memory encrypt for Realms

On 25/04/2024 14:42, Suzuki K Poulose wrote:
> On 15/04/2024 04:13, kernel test robot wrote:
>> Hi Steven,
>>
>> kernel test robot noticed the following build errors:
>>

<snip>

>>>> drivers/hv/channel.c:442:8: error: call to undeclared function
>>>> 'set_memory_decrypted'; ISO C99 and later do not support implicit
>>>> function declarations [-Wimplicit-function-declaration]
>>       442 |         ret = set_memory_decrypted((unsigned long)kbuffer,
>>           |               ^
>>>> drivers/hv/channel.c:531:3: error: call to undeclared function
>>>> 'set_memory_encrypted'; ISO C99 and later do not support implicit
>>>> function declarations [-Wimplicit-function-declaration]
>>       531 |                 set_memory_encrypted((unsigned long)kbuffer,
>>           |                 ^
>>     drivers/hv/channel.c:848:8: error: call to undeclared function
>> 'set_memory_encrypted'; ISO C99 and later do not support implicit
>> function declarations [-Wimplicit-function-declaration]
>>       848 |         ret = set_memory_encrypted((unsigned
>> long)gpadl->buffer,
>>           |               ^
>>     5 warnings and 3 errors generated.
> 
> Thats my mistake. The correct place for declaring set_memory_*crypted()
> is asm/set_memory.h not asm/mem_encrypt.h.
> 
> Steven, please could you fold this patch below :

Sure, I've folded into my local branch. Thanks for looking into the error.

Steve

> 
> diff --git a/arch/arm64/include/asm/mem_encrypt.h
> b/arch/arm64/include/asm/mem_encrypt.h
> index 7381f9585321..e47265cd180a 100644
> --- a/arch/arm64/include/asm/mem_encrypt.h
> +++ b/arch/arm64/include/asm/mem_encrypt.h
> @@ -14,6 +14,4 @@ static inline bool force_dma_unencrypted(struct device
> *dev)
>         return is_realm_world();
>  }
> 
> -int set_memory_encrypted(unsigned long addr, int numpages);
> -int set_memory_decrypted(unsigned long addr, int numpages);
>  #endif
> diff --git a/arch/arm64/include/asm/set_memory.h
> b/arch/arm64/include/asm/set_memory.h
> index 0f740b781187..9561b90fb43c 100644
> --- a/arch/arm64/include/asm/set_memory.h
> +++ b/arch/arm64/include/asm/set_memory.h
> @@ -14,4 +14,6 @@ int set_direct_map_invalid_noflush(struct page *page);
>  int set_direct_map_default_noflush(struct page *page);
>  bool kernel_page_present(struct page *page);
> 
> +int set_memory_encrypted(unsigned long addr, int numpages);
> +int set_memory_decrypted(unsigned long addr, int numpages);
> 
> 
> 
> Suzuki