linux-kernel - Re: [PATCH v7 29/36] x86, drm, fbdev: Do not specify encrypted memory for video mappings

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Date:   Sat, 17 Jun 2017 22:08:20 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Tom Lendacky <thomas.lendacky@....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, xen-devel@...ts.xen.org,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        Brijesh Singh <brijesh.singh@....com>,
        Toshimitsu Kani <toshi.kani@....com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Alexander Potapenko <glider@...gle.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Larry Woodman <lwoodman@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Joerg Roedel <joro@...tes.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Dave Young <dyoung@...hat.com>, Rik van Riel <riel@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH v7 29/36] x86, drm, fbdev: Do not specify encrypted
 memory for video mappings

Hi Tom,

[auto build test ERROR on next-20170616]
[cannot apply to tip/x86/core linus/master linux/master v4.9-rc8 v4.9-rc7 v4.9-rc6 v4.12-rc5]
[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/20170617-210824
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
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=sh 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/drm_gem.c: In function 'drm_gem_mmap_obj':
>> drivers/gpu/drm/drm_gem.c:932:22: error: implicit declaration of function 'pgprot_decrypted' [-Werror=implicit-function-declaration]
     vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                         ^~~~~~~~~~~~~~~~
>> drivers/gpu/drm/drm_gem.c:932:20: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
     vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                       ^
   cc1: some warnings being treated as errors
--
   drivers/video/fbdev/core/fbmem.c: In function 'fb_mmap':
>> drivers/video/fbdev/core/fbmem.c:1414:23: error: implicit declaration of function 'pgprot_decrypted' [-Werror=implicit-function-declaration]
      vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                          ^~~~~~~~~~~~~~~~
>> drivers/video/fbdev/core/fbmem.c:1414:21: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
      vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                        ^
   drivers/video/fbdev/core/fbmem.c:1444:20: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
     vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                       ^
   cc1: some warnings being treated as errors
--
   drivers/gpu/drm/udl/udl_fb.c: In function 'udl_fb_mmap':
>> drivers/gpu/drm/udl/udl_fb.c:174:22: error: implicit declaration of function 'pgprot_decrypted' [-Werror=implicit-function-declaration]
     vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                         ^~~~~~~~~~~~~~~~
>> drivers/gpu/drm/udl/udl_fb.c:174:20: error: incompatible types when assigning to type 'pgprot_t {aka struct <anonymous>}' from type 'int'
     vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
                       ^
   cc1: some warnings being treated as errors

vim +/pgprot_decrypted +932 drivers/gpu/drm/drm_gem.c

   926			return -EINVAL;
   927	
   928		vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP;
   929		vma->vm_ops = dev->driver->gem_vm_ops;
   930		vma->vm_private_data = obj;
   931		vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
 > 932		vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
   933	
   934		/* Take a ref for this mapping of the object, so that the fault
   935		 * handler can dereference the mmap offset's pointer to the object.

---
0-DAY kernel test infrastructure                Open Source Technology Center
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