Re: [PATCH v10 4/8] KVM: X86: Refresh CPUID on guest XSS change

[kbuild test robot <lkp@intel.com>]

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Hi Yang,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on next-20200319]
[cannot apply to vhost/linux-next tip/auto-latest linux/master linus/master v5.6-rc6]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Yang-Weijiang/Introduce-support-for-guest-CET-feature/20200320-155517
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.5.0-5) 7.5.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

   arch/x86/kvm/x86.c: In function 'kvm_set_cr0':
   arch/x86/kvm/x86.c:807:53: error: 'X86_CR4_CET' undeclared (first use in this function); did you mean 'X86_CR4_DE'?
     if (!(cr0 & X86_CR0_WP) && kvm_read_cr4_bits(vcpu, X86_CR4_CET))
                                                        ^~~~~~~~~~~
                                                        X86_CR4_DE
   arch/x86/kvm/x86.c:807:53: note: each undeclared identifier is reported only once for each function it appears in
   arch/x86/kvm/x86.c: In function 'kvm_arch_hardware_setup':
>> arch/x86/kvm/x86.c:189:28: error: 'XFEATURE_MASK_CET_USER' undeclared (first use in this function); did you mean 'XFEATURE_MASK_BNDCSR'?
    #define KVM_SUPPORTED_XSS (XFEATURE_MASK_CET_USER | \
                               ^
>> arch/x86/kvm/x86.c:9650:30: note: in expansion of macro 'KVM_SUPPORTED_XSS'
      supported_xss = host_xss & KVM_SUPPORTED_XSS;
                                 ^~~~~~~~~~~~~~~~~
>> arch/x86/kvm/x86.c:190:6: error: 'XFEATURE_MASK_CET_KERNEL' undeclared (first use in this function); did you mean 'XFEATURE_MASK_CET_USER'?
         XFEATURE_MASK_CET_KERNEL)
         ^
>> arch/x86/kvm/x86.c:9650:30: note: in expansion of macro 'KVM_SUPPORTED_XSS'
      supported_xss = host_xss & KVM_SUPPORTED_XSS;
                                 ^~~~~~~~~~~~~~~~~

vim +189 arch/x86/kvm/x86.c

18863bdd60f895 Avi Kivity          2009-09-07  183  
cfc481810c903a Sean Christopherson 2020-03-02  184  #define KVM_SUPPORTED_XCR0     (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
cfc481810c903a Sean Christopherson 2020-03-02  185  				| XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \
cfc481810c903a Sean Christopherson 2020-03-02  186  				| XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512 \
cfc481810c903a Sean Christopherson 2020-03-02  187  				| XFEATURE_MASK_PKRU)
cfc481810c903a Sean Christopherson 2020-03-02  188  
4d0c7566d56266 Yang Weijiang       2020-03-20 @189  #define KVM_SUPPORTED_XSS	(XFEATURE_MASK_CET_USER | \
4d0c7566d56266 Yang Weijiang       2020-03-20 @190  				 XFEATURE_MASK_CET_KERNEL)
4d0c7566d56266 Yang Weijiang       2020-03-20  191  

:::::: The code at line 189 was first introduced by commit
:::::: 4d0c7566d56266fc80759b1780e660edbb6f2fa8 KVM: VMX: Introduce CET VMX fields and flags

:::::: TO: Yang Weijiang <weijiang.yang@intel.com>
:::::: CC: 0day robot <lkp@intel.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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