Hi "Kirill, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on tip/x86/core] [also build test ERROR on v5.9] [cannot apply to kvm/linux-next hnaz-linux-mm/master next-20201016] [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] url: https://github.com/0day-ci/linux/commits/Kirill-A-Shutemov/KVM-protected-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 238c91115cd05c71447ea071624a4c9fe661f970 config: s390-randconfig-r011-20201020 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/47745b863bc9c5221c7b7f10bb0e1456a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kirill-A-Shutemov/KVM-protected-memory-extension/20201020-142130 git checkout 47745b863bc9c5221c7b7f10bb0e1456a7c1416a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function '__kvm_map_gfn': 2193 | hva = ioremap_cache_force(pfn_to_hpa(pfn), PAGE_SIZE); | ^~~~~~~~~~~~~~~~~~~ 2193 | hva = ioremap_cache_force(pfn_to_hpa(pfn), PAGE_SIZE); | ^ cc1: some warnings being treated as errors vim +/ioremap_cache_force +2193 arch/s390/kvm/../../../virt/kvm/kvm_main.c 2157 2158 static int __kvm_map_gfn(struct kvm_memslots *slots, gfn_t gfn, 2159 struct kvm_host_map *map, 2160 struct gfn_to_pfn_cache *cache, 2161 bool atomic) 2162 { 2163 kvm_pfn_t pfn; 2164 void *hva = NULL; 2165 struct page *page = KVM_UNMAPPED_PAGE; 2166 struct kvm_memory_slot *slot = __gfn_to_memslot(slots, gfn); 2167 bool protected; 2168 u64 gen = slots->generation; 2169 2170 if (!map) 2171 return -EINVAL; 2172 2173 if (cache) { 2174 if (!cache->pfn || cache->gfn != gfn || 2175 cache->generation != gen) { 2176 if (atomic) 2177 return -EAGAIN; 2178 kvm_cache_gfn_to_pfn(slot, gfn, cache, gen); 2179 } 2180 pfn = cache->pfn; 2181 protected = cache->protected; 2182 } else { 2183 if (atomic) 2184 return -EAGAIN; 2185 pfn = gfn_to_pfn_memslot_protected(slot, gfn, &protected); 2186 } 2187 if (is_error_noslot_pfn(pfn)) 2188 return -EINVAL; 2189 2190 if (protected) { 2191 if (atomic) 2192 return -EAGAIN; 2194 } else if (pfn_valid(pfn)) { 2195 page = pfn_to_page(pfn); 2196 if (atomic) 2197 hva = kmap_atomic(page); 2198 else 2199 hva = kmap(page); 2200 #ifdef CONFIG_HAS_IOMEM 2201 } else if (!atomic) { 2202 hva = memremap(pfn_to_hpa(pfn), PAGE_SIZE, MEMREMAP_WB); 2203 } else { 2204 return -EINVAL; 2205 #endif 2206 } 2207 2208 if (!hva) 2209 return -EFAULT; 2210 2211 map->page = page; 2212 map->hva = hva; 2213 map->pfn = pfn; 2214 map->gfn = gfn; 2215 map->protected = protected; 2216 2217 return 0; 2218 } 2219 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org