linux-kernel - Re: [RFC PATCH v1 1/2] xen/apic: Use vAPIC for IPI if the hardware supports it.

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Message-ID: <201510080427.hoCr9CMK%fengguang.wu@intel.com>
Date:	Thu, 8 Oct 2015 04:32:10 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	kbuild-all@...org, boris.ostrovsky@...cle.com,
	joao.m.martins@...cle.com, david.vrabel@...rix.com,
	jgross@...e.com, dario.faggioli@...rix.com,
	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: [RFC PATCH v1 1/2] xen/apic: Use vAPIC for IPI if the hardware
 supports it.

Hi Konrad,

[auto build test ERROR on v4.3-rc4 -- if it's inappropriate base, please ignore]

config: x86_64-randconfig-x016-201540 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/xen/smp.c: In function 'xen_use_vapic':
>> arch/x86/xen/smp.c:800:14: error: 'XEN_HVM_CPUID_X2APIC_VIRT' undeclared (first use in this function)
     if (((eax & XEN_HVM_CPUID_X2APIC_VIRT) && x2apic_mode) ||
                 ^
   arch/x86/xen/smp.c:800:14: note: each undeclared identifier is reported only once for each function it appears in
>> arch/x86/xen/smp.c:801:14: error: 'XEN_HVM_CPUID_APIC_ACCESS_VIRT' undeclared (first use in this function)
         ((eax & XEN_HVM_CPUID_APIC_ACCESS_VIRT) && cpu_has_apic))
                 ^

vim +/XEN_HVM_CPUID_X2APIC_VIRT +800 arch/x86/xen/smp.c

   794	}
   795	
   796	static bool __init xen_use_vapic(void)
   797	{
   798		uint32_t eax = cpuid_eax(xen_cpuid_base() + 4);
   799	
 > 800		if (((eax & XEN_HVM_CPUID_X2APIC_VIRT) && x2apic_mode) ||
 > 801		    ((eax & XEN_HVM_CPUID_APIC_ACCESS_VIRT) && cpu_has_apic))
   802			return true;
   803	
   804		return false;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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