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 91D4DC25B48 for ; Thu, 26 Oct 2023 12:45:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344961AbjJZMpa (ORCPT ); Thu, 26 Oct 2023 08:45:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231173AbjJZMp2 (ORCPT ); Thu, 26 Oct 2023 08:45:28 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D1E410E for ; Thu, 26 Oct 2023 05:45:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698324326; x=1729860326; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=tB1UvnL/BBKI4dYp1Pk77jnRcZ06AE1vQP71TSThmoQ=; b=VaAPm06t0WUcW4t+Y6o5xK8q7HtnID7SQ/+Gg6zQeI9IxdDo0yX210GO L2YrLJgkpLf4l51gbVnbrVtMdsCVTXO5MBGGAfZA5o8mkukE+W9SDtaAa fE2pBX3lVj1G6eeIQ5cAczeVhuXV30dlF2jvKjAbv9sZsB1vrAlf8LXhV IMiMXplhqCrw5UEk9wqS/0Gfbu0Q8daAxWdkZ68Yk/d3kl8+9v7G24G3v Mj4pC08lnry54QKcXM1E8EJ9v4Gfg/+v05joeSU9Jq9mU6DsPDfMSUbjF vZjRj9ctyp01q8TRDWFijYvTr/1PxYnMNw0jw3fLvulF9sDDxY226pxAi g==; X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="366877655" X-IronPort-AV: E=Sophos;i="6.03,253,1694761200"; d="scan'208";a="366877655" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2023 05:45:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10874"; a="709061069" X-IronPort-AV: E=Sophos;i="6.03,253,1694761200"; d="scan'208";a="709061069" Received: from lkp-server01.sh.intel.com (HELO 8917679a5d3e) ([10.239.97.150]) by orsmga003.jf.intel.com with ESMTP; 26 Oct 2023 05:45:21 -0700 Received: from kbuild by 8917679a5d3e with local (Exim 4.96) (envelope-from ) id 1qvzji-0009mt-2O; Thu, 26 Oct 2023 12:45:18 +0000 Date: Thu, 26 Oct 2023 20:45:12 +0800 From: kernel test robot To: Sebastian Ene , will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, akpm@linux-foundation.org, maz@kernel.org Cc: oe-kbuild-all@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel-team@android.com, vdonnefort@google.com, qperret@google.com, smostafa@google.com, Sebastian Ene Subject: Re: [PATCH v2 01/11] KVM: arm64: Add snap shooting the host stage-2 pagetables Message-ID: <202310262036.TVwm0bsI-lkp@intel.com> References: <20231019144032.2943044-3-sebastianene@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231019144032.2943044-3-sebastianene@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Sebastian, kernel test robot noticed the following build warnings: [auto build test WARNING on arm64/for-next/core] [also build test WARNING on kvmarm/next akpm-mm/mm-everything linus/master v6.6-rc7 next-20231025] [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/Sebastian-Ene/KVM-arm64-Add-snap-shooting-the-host-stage-2-pagetables/20231019-224346 base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core patch link: https://lore.kernel.org/r/20231019144032.2943044-3-sebastianene%40google.com patch subject: [PATCH v2 01/11] KVM: arm64: Add snap shooting the host stage-2 pagetables config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20231026/202310262036.TVwm0bsI-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231026/202310262036.TVwm0bsI-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/202310262036.TVwm0bsI-lkp@intel.com/ All warnings (new ones prefixed by >>): arch/arm64/kvm/hyp/nvhe/mem_protect.c: In function '__pkvm_host_stage2_prepare_copy': >> arch/arm64/kvm/hyp/nvhe/mem_protect.c:335:13: warning: variable 'nr_pages' set but not used [-Wunused-but-set-variable] 335 | u64 nr_pages; | ^~~~~~~~ vim +/nr_pages +335 arch/arm64/kvm/hyp/nvhe/mem_protect.c 326 327 int __pkvm_host_stage2_prepare_copy(struct kvm_pgtable_snapshot *snapshot) 328 { 329 size_t required_pgd_len; 330 struct kvm_pgtable_mm_ops mm_ops = {0}; 331 struct kvm_pgtable *to_pgt, *from_pgt = &host_mmu.pgt; 332 struct kvm_hyp_memcache *memcache = &snapshot->mc; 333 int ret; 334 void *pgd; > 335 u64 nr_pages; 336 337 required_pgd_len = kvm_pgtable_stage2_pgd_size(host_mmu.arch.vtcr); 338 if (snapshot->pgd_len < required_pgd_len) 339 return -ENOMEM; 340 341 to_pgt = &snapshot->pgtable; 342 nr_pages = snapshot->pgd_len / PAGE_SIZE; 343 pgd = kern_hyp_va(snapshot->pgd_hva); 344 345 hyp_spin_lock(&snapshot_pool_lock); 346 hyp_pool_init(&snapshot_pool, hyp_virt_to_pfn(pgd), 347 required_pgd_len / PAGE_SIZE, 0); 348 349 mm_ops.zalloc_pages_exact = snapshot_zalloc_pages_exact; 350 mm_ops.zalloc_page = snapshot_zalloc_page; 351 mm_ops.free_pages_exact = snapshot_s2_free_pages_exact; 352 mm_ops.get_page = snapshot_get_page; 353 mm_ops.phys_to_virt = hyp_phys_to_virt; 354 mm_ops.virt_to_phys = hyp_virt_to_phys; 355 mm_ops.page_count = hyp_page_count; 356 357 to_pgt->ia_bits = from_pgt->ia_bits; 358 to_pgt->start_level = from_pgt->start_level; 359 to_pgt->flags = from_pgt->flags; 360 to_pgt->mm_ops = &mm_ops; 361 362 host_lock_component(); 363 ret = kvm_pgtable_stage2_copy(to_pgt, from_pgt, memcache); 364 host_unlock_component(); 365 366 hyp_spin_unlock(&snapshot_pool_lock); 367 368 return ret; 369 } 370 #endif /* CONFIG_NVHE_EL2_DEBUG */ 371 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki