linux-kernel - Re: [PATCH v6 25/34] swiotlb: Add warnings for use of bounce buffers with SME

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Date:   Thu, 8 Jun 2017 16:09:36 -0500
From:   Tom Lendacky <thomas.lendacky@....com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, linux-arch@...r.kernel.org,
        linux-efi@...r.kernel.org, kvm@...r.kernel.org,
        linux-doc@...r.kernel.org, x86@...nel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kasan-dev@...glegroups.com, linux-mm@...ck.org,
        iommu@...ts.linux-foundation.org, Rik van Riel <riel@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Toshimitsu Kani <toshi.kani@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Joerg Roedel <joro@...tes.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Larry Woodman <lwoodman@...hat.com>,
        Brijesh Singh <brijesh.singh@....com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dave Young <dyoung@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dmitry Vyukov <dvyukov@...gle.com>
Subject: Re: [PATCH v6 25/34] swiotlb: Add warnings for use of bounce buffers
 with SME

On 6/8/2017 12:53 AM, kbuild test robot wrote:
> Hi Tom,
> 
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.12-rc4 next-20170607]
> [cannot apply to tip/x86/core]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Tom-Lendacky/x86-Secure-Memory-Encryption-AMD/20170608-104147
> config: sparc-defconfig (attached as .config)
> compiler: sparc-linux-gcc (GCC) 6.2.0
> reproduce:
>          wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>          chmod +x ~/bin/make.cross
>          # save the attached .config to linux build tree
>          make.cross ARCH=sparc
> 
> All errors (new ones prefixed by >>):
> 
>     In file included from include/linux/dma-mapping.h:13:0,
>                      from include/linux/skbuff.h:34,
>                      from include/linux/filter.h:12,
>                      from kernel//bpf/core.c:24:
>>> include/linux/mem_encrypt.h:16:29: fatal error: asm/mem_encrypt.h: No such file or directory
>      #include <asm/mem_encrypt.h>
>                                  ^
>     compilation terminated.

Okay, I had the wrong understanding of the asm-generic directory. The
next series will fix this so it is not an issue for other arches.

Thanks,
Tom

> 
> vim +16 include/linux/mem_encrypt.h
> 
> 2d7c2ec4 Tom Lendacky 2017-06-07  10   * published by the Free Software Foundation.
> 2d7c2ec4 Tom Lendacky 2017-06-07  11   */
> 2d7c2ec4 Tom Lendacky 2017-06-07  12
> 2d7c2ec4 Tom Lendacky 2017-06-07  13  #ifndef __MEM_ENCRYPT_H__
> 2d7c2ec4 Tom Lendacky 2017-06-07  14  #define __MEM_ENCRYPT_H__
> 2d7c2ec4 Tom Lendacky 2017-06-07  15
> 2d7c2ec4 Tom Lendacky 2017-06-07 @16  #include <asm/mem_encrypt.h>
> 2d7c2ec4 Tom Lendacky 2017-06-07  17
> 2d7c2ec4 Tom Lendacky 2017-06-07  18  #endif	/* __MEM_ENCRYPT_H__ */
> 
> :::::: The code at line 16 was first introduced by commit
> :::::: 2d7c2ec4c60e83432b27bfb32042706f404d4158 x86/mm: Add Secure Memory Encryption (SME) support
> 
> :::::: TO: Tom Lendacky <thomas.lendacky@....com>
> :::::: CC: 0day robot <fengguang.wu@...el.com>
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>