linux-kernel - Re: [PATCH v6 10/34] x86, x86/mm, x86/xen, olpc: Use __va() against just the physical address in cr3

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Message-ID: <201706081509.rlvRTFuv%fengguang.wu@intel.com>
Date:   Thu, 8 Jun 2017 15:39:03 +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, 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 10/34] x86, x86/mm, x86/xen, olpc: Use __va() against
 just the physical address in cr3

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: um-x86_64_defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=um SUBARCH=x86_64

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/cacheflush.h:6:0,
                    from include/linux/highmem.h:11,
                    from net/core/sock.c:116:
   arch/x86/include/asm/special_insns.h: In function 'native_read_cr3_pa':
>> arch/x86/include/asm/special_insns.h:239:30: error: 'PHYSICAL_PAGE_MASK' undeclared (first use in this function)
     return (native_read_cr3() & PHYSICAL_PAGE_MASK);
                                 ^~~~~~~~~~~~~~~~~~
   arch/x86/include/asm/special_insns.h:239:30: note: each undeclared identifier is reported only once for each function it appears in
   arch/x86/include/asm/special_insns.h: In function 'read_cr3_pa':
   arch/x86/include/asm/special_insns.h:244:23: error: 'PHYSICAL_PAGE_MASK' undeclared (first use in this function)
     return (read_cr3() & PHYSICAL_PAGE_MASK);
                          ^~~~~~~~~~~~~~~~~~

vim +/PHYSICAL_PAGE_MASK +239 arch/x86/include/asm/special_insns.h

   233	}
   234	
   235	#define nop() asm volatile ("nop")
   236	
   237	static inline unsigned long native_read_cr3_pa(void)
   238	{
 > 239		return (native_read_cr3() & PHYSICAL_PAGE_MASK);
   240	}
   241	
   242	static inline unsigned long read_cr3_pa(void)

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