Re: [PATCH v3 07/10] arm64: ptdump: Parse the host stage-2 page-tables from the snapshot

From: kernel test robot <lkp@intel.com>
To: Sebastian Ene <sebastianene@google.com>,
	will@kernel.org, Oliver Upton <oliver.upton@linux.dev>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Zenghui Yu <yuzenghui@huawei.com>,
	catalin.marinas@arm.com, mark.rutland@arm.com,
	akpm@linux-foundation.org, maz@kernel.org
Cc: oe-kbuild-all@lists.linux.dev, kvmarm@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 <sebastianene@google.com>
Subject: Re: [PATCH v3 07/10] arm64: ptdump: Parse the host stage-2 page-tables from the snapshot
Date: Thu, 16 Nov 2023 05:57:51 +0800	[thread overview]
Message-ID: <202311160522.Nr71iglr-lkp@intel.com> (raw)
In-Reply-To: <20231115171639.2852644-9-sebastianene@google.com>

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 linus/master v6.7-rc1 next-20231115]
[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/20231116-012017
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link:    https://lore.kernel.org/r/20231115171639.2852644-9-sebastianene%40google.com
patch subject: [PATCH v3 07/10] arm64: ptdump: Parse the host stage-2 page-tables from the snapshot
config: arm64-randconfig-001-20231116 (https://download.01.org/0day-ci/archive/20231116/202311160522.Nr71iglr-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/20231116/202311160522.Nr71iglr-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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311160522.Nr71iglr-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/mm/ptdump.c:178:31: warning: 'stage2_pte_bits' defined but not used [-Wunused-const-variable=]
     178 | static const struct prot_bits stage2_pte_bits[] = {
         |                               ^~~~~~~~~~~~~~~

vim +/stage2_pte_bits +178 arch/arm64/mm/ptdump.c

   177	
 > 178	static const struct prot_bits stage2_pte_bits[] = {
   179		{
   180			.mask	= PTE_VALID,
   181			.val	= PTE_VALID,
   182			.set	= " ",
   183			.clear	= "F",
   184		}, {
   185			.mask	= KVM_PTE_LEAF_ATTR_HI_S2_XN,
   186			.val	= KVM_PTE_LEAF_ATTR_HI_S2_XN,
   187			.set	= "XN",
   188			.clear	= "  ",
   189		}, {
   190			.mask	= KVM_PTE_LEAF_ATTR_LO_S2_S2AP_R,
   191			.val	= KVM_PTE_LEAF_ATTR_LO_S2_S2AP_R,
   192			.set	= "R",
   193			.clear	= " ",
   194		}, {
   195			.mask	= KVM_PTE_LEAF_ATTR_LO_S2_S2AP_W,
   196			.val	= KVM_PTE_LEAF_ATTR_LO_S2_S2AP_W,
   197			.set	= "W",
   198			.clear	= " ",
   199		}, {
   200			.mask	= KVM_PTE_LEAF_ATTR_LO_S2_AF,
   201			.val	= KVM_PTE_LEAF_ATTR_LO_S2_AF,
   202			.set	= "AF",
   203			.clear	= "  ",
   204		}, {
   205			.mask	= PTE_NG,
   206			.val	= PTE_NG,
   207			.set	= "FnXS",
   208			.clear	= "  ",
   209		}, {
   210			.mask	= PTE_CONT,
   211			.val	= PTE_CONT,
   212			.set	= "CON",
   213			.clear	= "   ",
   214		}, {
   215			.mask	= PTE_TABLE_BIT,
   216			.val	= PTE_TABLE_BIT,
   217			.set	= "   ",
   218			.clear	= "BLK",
   219		}, {
   220			.mask	= KVM_PGTABLE_PROT_SW0,
   221			.val	= KVM_PGTABLE_PROT_SW0,
   222			.set	= "SW0", /* PKVM_PAGE_SHARED_OWNED */
   223		}, {
   224			.mask   = KVM_PGTABLE_PROT_SW1,
   225			.val	= KVM_PGTABLE_PROT_SW1,
   226			.set	= "SW1", /* PKVM_PAGE_SHARED_BORROWED */
   227		}, {
   228			.mask	= KVM_PGTABLE_PROT_SW2,
   229			.val	= KVM_PGTABLE_PROT_SW2,
   230			.set	= "SW2",
   231		}, {
   232			.mask   = KVM_PGTABLE_PROT_SW3,
   233			.val	= KVM_PGTABLE_PROT_SW3,
   234			.set	= "SW3",
   235		},
   236	};
   237	

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https://github.com/intel/lkp-tests/wiki

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