[intel-tdx:guest 27/63] arch/x86/mm/ioremap.c:249:10: error: implicit declaration of function 'tdg_shared_mask'

[kernel test robot <lkp@intel.com>]

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tree:   https://github.com/intel/tdx.git guest
head:   f66b6b3c12281d76e43855be4d646001e3844e9b
commit: 723f5ab4db37e02eb1ec70fcbf9e6bc8fe1a4a78 [27/63] x86/tdx: Make pages shared in ioremap()
config: x86_64-randconfig-a005-20210601 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project db26cd30b6dd65e88d786e97a1e453af5cd48966)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/intel/tdx/commit/723f5ab4db37e02eb1ec70fcbf9e6bc8fe1a4a78
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest
        git checkout 723f5ab4db37e02eb1ec70fcbf9e6bc8fe1a4a78
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> arch/x86/mm/ioremap.c:249:10: error: implicit declaration of function 'tdg_shared_mask' [-Werror,-Wimplicit-function-declaration]
                   prot = pgprot_protected_guest(prot);
                          ^
   arch/x86/include/asm/pgtable.h:26:12: note: expanded from macro 'pgprot_protected_guest'
                                                 tdg_shared_mask())
                                                 ^
   arch/x86/mm/ioremap.c:721:17: warning: no previous prototype for function 'early_memremap_pgprot_adjust' [-Wmissing-prototypes]
   pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr,
                   ^
   arch/x86/mm/ioremap.c:721:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr,
   ^
   static 
   1 warning and 1 error generated.


vim +/tdg_shared_mask +249 arch/x86/mm/ioremap.c

   161	
   162	/*
   163	 * Remap an arbitrary physical address space into the kernel virtual
   164	 * address space. It transparently creates kernel huge I/O mapping when
   165	 * the physical address is aligned by a huge page size (1GB or 2MB) and
   166	 * the requested size is at least the huge page size.
   167	 *
   168	 * NOTE: MTRRs can override PAT memory types with a 4KB granularity.
   169	 * Therefore, the mapping code falls back to use a smaller page toward 4KB
   170	 * when a mapping range is covered by non-WB type of MTRRs.
   171	 *
   172	 * NOTE! We need to allow non-page-aligned mappings too: we will obviously
   173	 * have to convert them into an offset in a page-aligned mapping, but the
   174	 * caller shouldn't need to know that small detail.
   175	 */
   176	static void __iomem *
   177	__ioremap_caller(resource_size_t phys_addr, unsigned long size,
   178			 enum page_cache_mode pcm, void *caller, bool encrypted)
   179	{
   180		unsigned long offset, vaddr;
   181		resource_size_t last_addr;
   182		const resource_size_t unaligned_phys_addr = phys_addr;
   183		const unsigned long unaligned_size = size;
   184		struct ioremap_desc io_desc;
   185		struct vm_struct *area;
   186		enum page_cache_mode new_pcm;
   187		pgprot_t prot;
   188		int retval;
   189		void __iomem *ret_addr;
   190	
   191		/* Don't allow wraparound or zero size */
   192		last_addr = phys_addr + size - 1;
   193		if (!size || last_addr < phys_addr)
   194			return NULL;
   195	
   196		if (!phys_addr_valid(phys_addr)) {
   197			printk(KERN_WARNING "ioremap: invalid physical address %llx\n",
   198			       (unsigned long long)phys_addr);
   199			WARN_ON_ONCE(1);
   200			return NULL;
   201		}
   202	
   203		__ioremap_check_mem(phys_addr, size, &io_desc);
   204	
   205		/*
   206		 * Don't allow anybody to remap normal RAM that we're using..
   207		 */
   208		if (io_desc.flags & IORES_MAP_SYSTEM_RAM) {
   209			WARN_ONCE(1, "ioremap on RAM@%pa - %pa\n",
   210				  &phys_addr, &last_addr);
   211			return NULL;
   212		}
   213	
   214		/*
   215		 * Mappings have to be page-aligned
   216		 */
   217		offset = phys_addr & ~PAGE_MASK;
   218		phys_addr &= PHYSICAL_PAGE_MASK;
   219		size = PAGE_ALIGN(last_addr+1) - phys_addr;
   220	
   221		retval = memtype_reserve(phys_addr, (u64)phys_addr + size,
   222							pcm, &new_pcm);
   223		if (retval) {
   224			printk(KERN_ERR "ioremap memtype_reserve failed %d\n", retval);
   225			return NULL;
   226		}
   227	
   228		if (pcm != new_pcm) {
   229			if (!is_new_memtype_allowed(phys_addr, size, pcm, new_pcm)) {
   230				printk(KERN_ERR
   231			"ioremap error for 0x%llx-0x%llx, requested 0x%x, got 0x%x\n",
   232					(unsigned long long)phys_addr,
   233					(unsigned long long)(phys_addr + size),
   234					pcm, new_pcm);
   235				goto err_free_memtype;
   236			}
   237			pcm = new_pcm;
   238		}
   239	
   240		/*
   241		 * If the page being mapped is in memory and SEV is active then
   242		 * make sure the memory encryption attribute is enabled in the
   243		 * resulting mapping.
   244		 */
   245		prot = PAGE_KERNEL_IO;
   246		if ((io_desc.flags & IORES_MAP_ENCRYPTED) || encrypted)
   247			prot = pgprot_encrypted(prot);
   248		else if (protected_guest_has(VM_SHARED_MAPPING_INIT))
 > 249			prot = pgprot_protected_guest(prot);
   250	
   251		switch (pcm) {
   252		case _PAGE_CACHE_MODE_UC:
   253		default:
   254			prot = __pgprot(pgprot_val(prot) |
   255					cachemode2protval(_PAGE_CACHE_MODE_UC));
   256			break;
   257		case _PAGE_CACHE_MODE_UC_MINUS:
   258			prot = __pgprot(pgprot_val(prot) |
   259					cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS));
   260			break;
   261		case _PAGE_CACHE_MODE_WC:
   262			prot = __pgprot(pgprot_val(prot) |
   263					cachemode2protval(_PAGE_CACHE_MODE_WC));
   264			break;
   265		case _PAGE_CACHE_MODE_WT:
   266			prot = __pgprot(pgprot_val(prot) |
   267					cachemode2protval(_PAGE_CACHE_MODE_WT));
   268			break;
   269		case _PAGE_CACHE_MODE_WB:
   270			break;
   271		}
   272	
   273		/*
   274		 * Ok, go for it..
   275		 */
   276		area = get_vm_area_caller(size, VM_IOREMAP, caller);
   277		if (!area)
   278			goto err_free_memtype;
   279		area->phys_addr = phys_addr;
   280		vaddr = (unsigned long) area->addr;
   281	
   282		if (memtype_kernel_map_sync(phys_addr, size, pcm))
   283			goto err_free_area;
   284	
   285		if (ioremap_page_range(vaddr, vaddr + size, phys_addr, prot))
   286			goto err_free_area;
   287	
   288		ret_addr = (void __iomem *) (vaddr + offset);
   289		mmiotrace_ioremap(unaligned_phys_addr, unaligned_size, ret_addr);
   290	
   291		/*
   292		 * Check if the request spans more than any BAR in the iomem resource
   293		 * tree.
   294		 */
   295		if (iomem_map_sanity_check(unaligned_phys_addr, unaligned_size))
   296			pr_warn("caller %pS mapping multiple BARs\n", caller);
   297	
   298		return ret_addr;
   299	err_free_area:
   300		free_vm_area(area);
   301	err_free_memtype:
   302		memtype_free(phys_addr, phys_addr + size);
   303		return NULL;
   304	}
   305	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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