From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9C21C433EF for ; Thu, 9 Dec 2021 21:04:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232608AbhLIVIQ (ORCPT ); Thu, 9 Dec 2021 16:08:16 -0500 Received: from mga11.intel.com ([192.55.52.93]:31442 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231374AbhLIVIP (ORCPT ); Thu, 9 Dec 2021 16:08:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1639083881; x=1670619881; h=date:from:to:cc:subject:message-id:mime-version; bh=4hxx5pVJ+4n5HPkOdw7km8GM2pLgp9IY2efketRTUik=; b=UPxpEKEwrhe0nfcCKdUb+Xq5HFwNvWWeCtIKsDa6iF9SH671luRVtF7n bCXrr4+hbUjEUAndmrYzkm21NDq7vaHvzL5Ci7JKZ0AS5gslCPbB4YnjN 2CSMCINLcP4Zda6r3x9CUBLcSFkuQxoYmdEH0f3ehY/EToFUOHqytV1u4 eCfa5+AJ9Umo7DmV1blsDwh+gfnPwD0ojXEQcBUg3cnruvYxmQRs9eu9C r3szrDiJolrEIFwgQS80kkKk6YHIsbD1ciJrOGuGmj28PRaw9y5hrveuE i0D1EbZogUNmEqBjeiOeDkLgN08w8dn2Jr/fGGyu8r1aBcPQR8JV/ysen Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10193"; a="235718580" X-IronPort-AV: E=Sophos;i="5.88,193,1635231600"; d="scan'208";a="235718580" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Dec 2021 13:04:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,193,1635231600"; d="scan'208";a="516479308" Received: from lkp-server02.sh.intel.com (HELO 9e1e9f9b3bcb) ([10.239.97.151]) by orsmga008.jf.intel.com with ESMTP; 09 Dec 2021 13:04:39 -0800 Received: from kbuild by 9e1e9f9b3bcb with local (Exim 4.92) (envelope-from ) id 1mvQak-0002Nk-Tu; Thu, 09 Dec 2021 21:04:38 +0000 Date: Fri, 10 Dec 2021 05:04:15 +0800 From: kernel test robot To: Thomas Bogendoerfer Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: arch/mips/kvm/vz.c:1552: warning: expecting prototype for kvm_trap_vz_handle_cop_unusuable(). Prototype was for kvm_trap_vz_handle_cop_unusable() instead Message-ID: <202112100504.EqkymVXu-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Thomas, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2a987e65025e2b79c6d453b78cb5985ac6e5eb26 commit: 45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 MIPS: Remove KVM_TE support date: 9 months ago config: mips-randconfig-r005-20211209 (https://download.01.org/0day-ci/archive/20211210/202112100504.EqkymVXu-lkp@intel.com/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a) 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 # install mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 45c7e8af4a5e3f0bea4ac209eea34118dd57ac64 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/crypto/ arch/mips/kvm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): arch/mips/kvm/vz.c:471: warning: Function parameter or member 'out_compare' not described in '_kvm_vz_save_htimer' arch/mips/kvm/vz.c:471: warning: Function parameter or member 'out_cause' not described in '_kvm_vz_save_htimer' arch/mips/kvm/vz.c:471: warning: Excess function parameter 'compare' description in '_kvm_vz_save_htimer' arch/mips/kvm/vz.c:471: warning: Excess function parameter 'cause' description in '_kvm_vz_save_htimer' >> arch/mips/kvm/vz.c:1552: warning: expecting prototype for kvm_trap_vz_handle_cop_unusuable(). Prototype was for kvm_trap_vz_handle_cop_unusable() instead vim +1552 arch/mips/kvm/vz.c c992a4f6a9b0a37 James Hogan 2017-03-14 1543 c992a4f6a9b0a37 James Hogan 2017-03-14 1544 /** c992a4f6a9b0a37 James Hogan 2017-03-14 1545 * kvm_trap_vz_handle_cop_unusuable() - Guest used unusable coprocessor. c992a4f6a9b0a37 James Hogan 2017-03-14 1546 * @vcpu: Virtual CPU context. c992a4f6a9b0a37 James Hogan 2017-03-14 1547 * c992a4f6a9b0a37 James Hogan 2017-03-14 1548 * Handle when the guest attempts to use a coprocessor which hasn't been allowed c992a4f6a9b0a37 James Hogan 2017-03-14 1549 * by the root context. c992a4f6a9b0a37 James Hogan 2017-03-14 1550 */ c992a4f6a9b0a37 James Hogan 2017-03-14 1551 static int kvm_trap_vz_handle_cop_unusable(struct kvm_vcpu *vcpu) c992a4f6a9b0a37 James Hogan 2017-03-14 @1552 { c992a4f6a9b0a37 James Hogan 2017-03-14 1553 u32 cause = vcpu->arch.host_cp0_cause; c992a4f6a9b0a37 James Hogan 2017-03-14 1554 enum emulation_result er = EMULATE_FAIL; c992a4f6a9b0a37 James Hogan 2017-03-14 1555 int ret = RESUME_GUEST; c992a4f6a9b0a37 James Hogan 2017-03-14 1556 c992a4f6a9b0a37 James Hogan 2017-03-14 1557 if (((cause & CAUSEF_CE) >> CAUSEB_CE) == 1) { c992a4f6a9b0a37 James Hogan 2017-03-14 1558 /* c992a4f6a9b0a37 James Hogan 2017-03-14 1559 * If guest FPU not present, the FPU operation should have been c992a4f6a9b0a37 James Hogan 2017-03-14 1560 * treated as a reserved instruction! c992a4f6a9b0a37 James Hogan 2017-03-14 1561 * If FPU already in use, we shouldn't get this at all. c992a4f6a9b0a37 James Hogan 2017-03-14 1562 */ c992a4f6a9b0a37 James Hogan 2017-03-14 1563 if (WARN_ON(!kvm_mips_guest_has_fpu(&vcpu->arch) || c992a4f6a9b0a37 James Hogan 2017-03-14 1564 vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU)) { c992a4f6a9b0a37 James Hogan 2017-03-14 1565 preempt_enable(); c992a4f6a9b0a37 James Hogan 2017-03-14 1566 return EMULATE_FAIL; c992a4f6a9b0a37 James Hogan 2017-03-14 1567 } c992a4f6a9b0a37 James Hogan 2017-03-14 1568 c992a4f6a9b0a37 James Hogan 2017-03-14 1569 kvm_own_fpu(vcpu); c992a4f6a9b0a37 James Hogan 2017-03-14 1570 er = EMULATE_DONE; c992a4f6a9b0a37 James Hogan 2017-03-14 1571 } c992a4f6a9b0a37 James Hogan 2017-03-14 1572 /* other coprocessors not handled */ c992a4f6a9b0a37 James Hogan 2017-03-14 1573 c992a4f6a9b0a37 James Hogan 2017-03-14 1574 switch (er) { c992a4f6a9b0a37 James Hogan 2017-03-14 1575 case EMULATE_DONE: c992a4f6a9b0a37 James Hogan 2017-03-14 1576 ret = RESUME_GUEST; c992a4f6a9b0a37 James Hogan 2017-03-14 1577 break; c992a4f6a9b0a37 James Hogan 2017-03-14 1578 c992a4f6a9b0a37 James Hogan 2017-03-14 1579 case EMULATE_FAIL: c34b26b98caca48 Tianjia Zhang 2020-06-23 1580 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; c992a4f6a9b0a37 James Hogan 2017-03-14 1581 ret = RESUME_HOST; c992a4f6a9b0a37 James Hogan 2017-03-14 1582 break; c992a4f6a9b0a37 James Hogan 2017-03-14 1583 c992a4f6a9b0a37 James Hogan 2017-03-14 1584 default: c992a4f6a9b0a37 James Hogan 2017-03-14 1585 BUG(); c992a4f6a9b0a37 James Hogan 2017-03-14 1586 } c992a4f6a9b0a37 James Hogan 2017-03-14 1587 return ret; c992a4f6a9b0a37 James Hogan 2017-03-14 1588 } c992a4f6a9b0a37 James Hogan 2017-03-14 1589 :::::: The code at line 1552 was first introduced by commit :::::: c992a4f6a9b0a37c8bd7dfc727ecc3fed125c16b KVM: MIPS: Implement VZ support :::::: TO: James Hogan :::::: CC: James Hogan --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org