linux-kernel - Re: [PATCH v7 16/18] KVM: x86: Add guest support for detecting and enabling SEV Live Migration feature.

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Message-ID: <202005010004.umC5nB0h%lkp@intel.com>
Date:   Fri, 1 May 2020 00:42:27 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Ashish Kalra <Ashish.Kalra@....com>, pbonzini@...hat.com
Cc:     kbuild-all@...ts.01.org, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, joro@...tes.org, bp@...e.de,
        thomas.lendacky@....com, x86@...nel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 16/18] KVM: x86: Add guest support for detecting and
 enabling SEV Live Migration feature.

Hi Ashish,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v5.7-rc3]
[cannot apply to kvm/linux-next tip/x86/mm tip/x86/core next-20200430]
[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/Ashish-Kalra/Add-AMD-SEV-guest-live-migration-support/20200430-202702
base:    6a8b55ed4056ea5559ebe4f6a4b247f627870d4c
config: i386-randconfig-a003-20200430 (attached as .config)
compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

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

All errors (new ones prefixed by >>):

   arch/x86/kernel/kvm.c: In function 'kvm_init_platform':
>> arch/x86/kernel/kvm.c:780:24: error: lvalue required as left operand of assignment
      sev_live_mig_enabled = true;
                           ^

vim +780 arch/x86/kernel/kvm.c

   773	
   774	static void __init kvm_init_platform(void)
   775	{
   776		if (sev_active() &&
   777		    kvm_para_has_feature(KVM_FEATURE_SEV_LIVE_MIGRATION)) {
   778	
   779			printk(KERN_INFO "KVM enable live migration\n");
 > 780			sev_live_mig_enabled = true;
   781			/*
   782			 * If not booted using EFI, enable Live migration support.
   783			 */
   784			if (!efi_enabled(EFI_BOOT))
   785				wrmsrl(MSR_KVM_SEV_LIVE_MIG_EN,
   786				       KVM_SEV_LIVE_MIGRATION_ENABLED);
   787		} else
   788			printk(KERN_INFO "KVM enable live migration feature unsupported\n");
   789	
   790		kvmclock_init();
   791		x86_platform.apic_post_init = kvm_apic_init;
   792	}
   793	

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

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