From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8C0AF1D63D8; Sun, 17 Aug 2025 08:23:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755419033; cv=none; b=Jlmz4mLjcqumIDXN2n4n0anDhGlH6xX74JZQqDTaYd8EkaeR6COqwvWpYYETzLa5pgedY3v+x4f5wN4ePjDnqifxNU/M8etyjP3t67tHoyReSkYlZWNHKP6fhzRd+teE/MTsTRUR8Z91XtmiFNThbSPOZhlDHAUciL3EC3gN0ig= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755419033; c=relaxed/simple; bh=RZAnz7L85Wfz24qIoBnlsJGnPIYsmf8V4ssxmCvYkzI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=g/Ws3yZSrCojDjbYu2wNyiQD94ugRnKwwN5JhnBBu5rAEvvCAehYLvl+bWRHogduH/PTPH/2Q63yhfp0/WOT+hwhULNBhH8/ZM8gbh0h35NGhbWA64o01lMSXglacljU7J7pdnLQ8om7KY/umWQ/va6Itrk9XyN7ON6sNSVfzow= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=bkHQQv9T; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="bkHQQv9T" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1755419031; x=1786955031; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=RZAnz7L85Wfz24qIoBnlsJGnPIYsmf8V4ssxmCvYkzI=; b=bkHQQv9TDwJ+27zSaM4af2P/amydVeNWa6x6vOPCnhfl8Vl5VisBXi65 t0m43CTwWiW6/PC9cxIhtoblMZz2N3mUcqRSha6wyO9x8Qr55rPKFEnhD vcvGGwvDPVR3jsJWwlPU+yHijjU4xl731Yo1oYmscLCspY7Fx/4OMzKzT 4SMMi6tqc400R6qerVIOdmViiodMmtbbf2l6EOf9O9AFtrMVZlrUH8FLR 2+8tgSzIasQMh/Lk1+zP9A6WIo0NqID1sGPuVdUTJVxDlpTb8EYO5Q3XH vTC8xtgBoWbAGcusox+QEkl8GwiQwI34A8JCFTK6PxuZ1eseqS4gx5iM4 g==; X-CSE-ConnectionGUID: 1t1xlSIPSAGz7NPc/hAVqQ== X-CSE-MsgGUID: yhyu9U64TOyqwcNfeXNOKw== X-IronPort-AV: E=McAfee;i="6800,10657,11524"; a="69041013" X-IronPort-AV: E=Sophos;i="6.17,293,1747724400"; d="scan'208";a="69041013" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2025 01:23:51 -0700 X-CSE-ConnectionGUID: bjJLIwlUSRmjcf8/bTZHlg== X-CSE-MsgGUID: 7anPUwZpTUSNNe2QAQ62FQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,293,1747724400"; d="scan'208";a="168147451" Received: from lkp-server02.sh.intel.com (HELO 4ea60e6ab079) ([10.239.97.151]) by fmviesa010.fm.intel.com with ESMTP; 17 Aug 2025 01:23:47 -0700 Received: from kbuild by 4ea60e6ab079 with local (Exim 4.96) (envelope-from ) id 1unYg5-000DQN-0O; Sun, 17 Aug 2025 08:23:45 +0000 Date: Sun, 17 Aug 2025 16:22:50 +0800 From: kernel test robot To: fangyu.yu@linux.alibaba.com, anup@brainfault.org, atish.patra@linux.dev, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, guoren@linux.alibaba.com, guoren@kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Fangyu Yu Subject: Re: [PATCH] RISC-V: KVM: Write hgatp register with valid mode bits Message-ID: <202508171655.76Ifmphq-lkp@intel.com> References: <20250816073234.77646-1-fangyu.yu@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250816073234.77646-1-fangyu.yu@linux.alibaba.com> Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on kvm/queue] [also build test WARNING on kvm/next mst-vhost/linux-next linus/master v6.17-rc1 next-20250815] [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/fangyu-yu-linux-alibaba-com/RISC-V-KVM-Write-hgatp-register-with-valid-mode-bits/20250816-153513 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue patch link: https://lore.kernel.org/r/20250816073234.77646-1-fangyu.yu%40linux.alibaba.com patch subject: [PATCH] RISC-V: KVM: Write hgatp register with valid mode bits config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20250817/202508171655.76Ifmphq-lkp@intel.com/config) compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250817/202508171655.76Ifmphq-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202508171655.76Ifmphq-lkp@intel.com/ All warnings (new ones prefixed by >>): arch/riscv/kvm/vmid.c:31:24: error: call to undeclared function 'kvm_riscv_gstage_mode'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] csr_write(CSR_HGATP, (kvm_riscv_gstage_mode() << HGATP_MODE_SHIFT) | HGATP_VMID); ^ >> arch/riscv/kvm/vmid.c:31:48: warning: shift count >= width of type [-Wshift-count-overflow] csr_write(CSR_HGATP, (kvm_riscv_gstage_mode() << HGATP_MODE_SHIFT) | HGATP_VMID); ^ ~~~~~~~~~~~~~~~~ arch/riscv/include/asm/csr.h:538:38: note: expanded from macro 'csr_write' unsigned long __v = (unsigned long)(val); \ ^~~ 1 warning and 1 error generated. vim +31 arch/riscv/kvm/vmid.c 24 25 void __init kvm_riscv_gstage_vmid_detect(void) 26 { 27 unsigned long old; 28 29 /* Figure-out number of VMID bits in HW */ 30 old = csr_read(CSR_HGATP); > 31 csr_write(CSR_HGATP, (kvm_riscv_gstage_mode() << HGATP_MODE_SHIFT) | HGATP_VMID); 32 vmid_bits = csr_read(CSR_HGATP); 33 vmid_bits = (vmid_bits & HGATP_VMID) >> HGATP_VMID_SHIFT; 34 vmid_bits = fls_long(vmid_bits); 35 csr_write(CSR_HGATP, old); 36 37 /* We polluted local TLB so flush all guest TLB */ 38 kvm_riscv_local_hfence_gvma_all(); 39 40 /* We don't use VMID bits if they are not sufficient */ 41 if ((1UL << vmid_bits) < num_possible_cpus()) 42 vmid_bits = 0; 43 } 44 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki