arch/x86/kernel/tboot.c:481:16: sparse: sparse: incorrect type in assignment (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6a70f89cc58f2368efa055cbcbd8b37384f6c588
commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces
date:   4 weeks ago
config: i386-randconfig-s002-20200718 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-49-g707c5017-dirty
        git checkout 670d0a4b10704667765f7d18f7592993d02783aa
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

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


sparse warnings: (new ones prefixed by >>)

>> arch/x86/kernel/tboot.c:481:16: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *config @@     got void [noderef] __iomem * @@
   arch/x86/kernel/tboot.c:481:16: sparse:     expected void *config
>> arch/x86/kernel/tboot.c:481:16: sparse:     got void [noderef] __iomem *
>> arch/x86/kernel/tboot.c:487:19: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *heap_base @@     got void [noderef] __iomem * @@
   arch/x86/kernel/tboot.c:487:19: sparse:     expected void *heap_base
   arch/x86/kernel/tboot.c:487:19: sparse:     got void [noderef] __iomem *
>> arch/x86/kernel/tboot.c:489:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void *config @@
>> arch/x86/kernel/tboot.c:489:17: sparse:     expected void volatile [noderef] __iomem *addr
   arch/x86/kernel/tboot.c:489:17: sparse:     got void *config

vim +481 arch/x86/kernel/tboot.c

3162534069597e Joseph Cihula 2009-06-30  467  
3162534069597e Joseph Cihula 2009-06-30  468  struct acpi_table_header *tboot_get_dmar_table(struct acpi_table_header *dmar_tbl)
3162534069597e Joseph Cihula 2009-06-30  469  {
3162534069597e Joseph Cihula 2009-06-30  470  	void *heap_base, *heap_ptr, *config;
3162534069597e Joseph Cihula 2009-06-30  471  
3162534069597e Joseph Cihula 2009-06-30  472  	if (!tboot_enabled())
3162534069597e Joseph Cihula 2009-06-30  473  		return dmar_tbl;
3162534069597e Joseph Cihula 2009-06-30  474  
3162534069597e Joseph Cihula 2009-06-30  475  	/*
3162534069597e Joseph Cihula 2009-06-30  476  	 * ACPI tables may not be DMA protected by tboot, so use DMAR copy
3162534069597e Joseph Cihula 2009-06-30  477  	 * SINIT saved in SinitMleData in TXT heap (which is DMA protected)
3162534069597e Joseph Cihula 2009-06-30  478  	 */
3162534069597e Joseph Cihula 2009-06-30  479  
3162534069597e Joseph Cihula 2009-06-30  480  	/* map config space in order to get heap addr */
3162534069597e Joseph Cihula 2009-06-30 @481  	config = ioremap(TXT_PUB_CONFIG_REGS_BASE, NR_TXT_CONFIG_PAGES *
3162534069597e Joseph Cihula 2009-06-30  482  			 PAGE_SIZE);
3162534069597e Joseph Cihula 2009-06-30  483  	if (!config)
3162534069597e Joseph Cihula 2009-06-30  484  		return NULL;
3162534069597e Joseph Cihula 2009-06-30  485  
3162534069597e Joseph Cihula 2009-06-30  486  	/* now map TXT heap */
3162534069597e Joseph Cihula 2009-06-30 @487  	heap_base = ioremap(*(u64 *)(config + TXTCR_HEAP_BASE),
3162534069597e Joseph Cihula 2009-06-30  488  			    *(u64 *)(config + TXTCR_HEAP_SIZE));
3162534069597e Joseph Cihula 2009-06-30 @489  	iounmap(config);
3162534069597e Joseph Cihula 2009-06-30  490  	if (!heap_base)
3162534069597e Joseph Cihula 2009-06-30  491  		return NULL;
3162534069597e Joseph Cihula 2009-06-30  492  
3162534069597e Joseph Cihula 2009-06-30  493  	/* walk heap to SinitMleData */
3162534069597e Joseph Cihula 2009-06-30  494  	/* skip BiosData */
3162534069597e Joseph Cihula 2009-06-30  495  	heap_ptr = heap_base + *(u64 *)heap_base;
3162534069597e Joseph Cihula 2009-06-30  496  	/* skip OsMleData */
3162534069597e Joseph Cihula 2009-06-30  497  	heap_ptr += *(u64 *)heap_ptr;
3162534069597e Joseph Cihula 2009-06-30  498  	/* skip OsSinitData */
3162534069597e Joseph Cihula 2009-06-30  499  	heap_ptr += *(u64 *)heap_ptr;
3162534069597e Joseph Cihula 2009-06-30  500  	/* now points to SinitMleDataSize; set to SinitMleData */
3162534069597e Joseph Cihula 2009-06-30  501  	heap_ptr += sizeof(u64);
3162534069597e Joseph Cihula 2009-06-30  502  	/* get addr of DMAR table */
3162534069597e Joseph Cihula 2009-06-30  503  	dmar_tbl = (struct acpi_table_header *)(heap_ptr +
3162534069597e Joseph Cihula 2009-06-30  504  		   ((struct sinit_mle_data *)heap_ptr)->vtd_dmars_off -
3162534069597e Joseph Cihula 2009-06-30  505  		   sizeof(u64));
3162534069597e Joseph Cihula 2009-06-30  506  
3162534069597e Joseph Cihula 2009-06-30  507  	/* don't unmap heap because dmar.c needs access to this */
3162534069597e Joseph Cihula 2009-06-30  508  
3162534069597e Joseph Cihula 2009-06-30  509  	return dmar_tbl;
3162534069597e Joseph Cihula 2009-06-30  510  }
3162534069597e Joseph Cihula 2009-06-30  511  

:::::: The code at line 481 was first introduced by commit
:::::: 3162534069597e34dd0ac9eb711be8dc23835ae7 x86, intel_txt: Intel TXT boot support

:::::: TO: Joseph Cihula <joseph.cihula@xxxxxxxxx>
:::::: CC: H. Peter Anvin <hpa@xxxxxxxxx>

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

Attachment: .config.gz
Description: application/gzip