Re: [PATCH v6 29/30] LoongArch: KVM: Enable kvm config and add the makefile

From: kernel test robot <lkp@intel.com>
To: Tianrui Zhao <zhaotianrui@loongson.cn>,
	Paolo Bonzini <pbonzini@redhat.com>
Cc: oe-kbuild-all@lists.linux.dev,
	Huacai Chen <chenhuacai@kernel.org>,
	WANG Xuerui <kernel@xen0n.name>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	loongarch@lists.linux.dev, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
	Mark Brown <broonie@kernel.org>,
	Alex Deucher <alexander.deucher@amd.com>,
	Oliver Upton <oliver.upton@linux.dev>,
	maobibo@loongson.cn, Xi Ruoyao <xry111@xry111.site>,
	zhaotianrui@loongson.cn
Subject: Re: [PATCH v6 29/30] LoongArch: KVM: Enable kvm config and add the makefile
Date: Thu, 13 Apr 2023 15:32:00 +0800	[thread overview]
Message-ID: <202304131526.iXfLaVZc-lkp@intel.com> (raw)
In-Reply-To: <20230412083023.1693910-30-zhaotianrui@loongson.cn>

Hi Tianrui,

kernel test robot noticed the following build errors:

[auto build test ERROR on kvm/queue]
[also build test ERROR on linus/master v6.3-rc6 next-20230412]
[cannot apply to kvm/linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Tianrui-Zhao/LoongArch-KVM-Add-kvm-related-header-files/20230412-163935
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
patch link:    https://lore.kernel.org/r/20230412083023.1693910-30-zhaotianrui%40loongson.cn
patch subject: [PATCH v6 29/30] LoongArch: KVM: Enable kvm config and add the makefile
config: loongarch-randconfig-c033-20230413 (https://download.01.org/0day-ci/archive/20230413/202304131526.iXfLaVZc-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/19c2472bf2612603ce4671e06fb185516a99e040
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Tianrui-Zhao/LoongArch-KVM-Add-kvm-related-header-files/20230412-163935
        git checkout 19c2472bf2612603ce4671e06fb185516a99e040
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash arch/loongarch/kvm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304131526.iXfLaVZc-lkp@intel.com/

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

   In file included from arch/loongarch/include/asm/cpu-info.h:11,
                    from arch/loongarch/include/asm/processor.h:13,
                    from arch/loongarch/include/asm/thread_info.h:15,
                    from include/linux/thread_info.h:60,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/loongarch/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/percpu.h:6,
                    from include/linux/context_tracking_state.h:5,
                    from include/linux/hardirq.h:5,
                    from include/linux/kvm_host.h:7,
                    from arch/loongarch/kvm/vcpu.c:6:
   In function 'gcsr_read',
       inlined from 'kvm_save_hw_gcsr' at arch/loongarch/include/asm/kvm_csr.h:24:19:
>> arch/loongarch/include/asm/loongarch.h:244:9: warning: 'asm' operand 1 probably does not match constraints
     244 |         asm volatile (
         |         ^~~
>> arch/loongarch/include/asm/loongarch.h:244:9: error: impossible constraint in 'asm'
   In function 'gcsr_write',
       inlined from 'kvm_restore_hw_gcsr' at arch/loongarch/include/asm/kvm_csr.h:29:2:
   arch/loongarch/include/asm/loongarch.h:261:9: warning: 'asm' operand 1 probably does not match constraints
     261 |         asm volatile (
         |         ^~~

vim +/asm +244 arch/loongarch/include/asm/loongarch.h

f2ac457a61389b Huacai Chen  2022-05-31  238  
2c87b678639d25 Tianrui Zhao 2023-04-12  239  /* GCSR */
2c87b678639d25 Tianrui Zhao 2023-04-12  240  static inline u64 gcsr_read(u32 reg)
2c87b678639d25 Tianrui Zhao 2023-04-12  241  {
2c87b678639d25 Tianrui Zhao 2023-04-12  242  	u64 val = 0;
2c87b678639d25 Tianrui Zhao 2023-04-12  243  	/* Instructions will be available in binutils later */
2c87b678639d25 Tianrui Zhao 2023-04-12 @244  	asm volatile (
2c87b678639d25 Tianrui Zhao 2023-04-12  245  		"parse_r __reg, %[val]\n\t"
2c87b678639d25 Tianrui Zhao 2023-04-12  246  		/*
2c87b678639d25 Tianrui Zhao 2023-04-12  247  		 * read val from guest csr register %[reg]
2c87b678639d25 Tianrui Zhao 2023-04-12  248  		 * gcsrrd %[val], %[reg]
2c87b678639d25 Tianrui Zhao 2023-04-12  249  		 */
2c87b678639d25 Tianrui Zhao 2023-04-12  250  		".word 0x5 << 24 | %[reg] << 10 | 0 << 5 | __reg\n\t"
2c87b678639d25 Tianrui Zhao 2023-04-12  251  		: [val] "+r" (val)
2c87b678639d25 Tianrui Zhao 2023-04-12  252  		: [reg] "i" (reg)
2c87b678639d25 Tianrui Zhao 2023-04-12  253  		: "memory");
2c87b678639d25 Tianrui Zhao 2023-04-12  254  
2c87b678639d25 Tianrui Zhao 2023-04-12  255  	return val;
2c87b678639d25 Tianrui Zhao 2023-04-12  256  }
2c87b678639d25 Tianrui Zhao 2023-04-12  257  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests