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Subject[tip:x86/sev 55/55] arch/x86/kernel/sev.c:605:17: sparse: sparse: incorrect type in argument 1 (different address spaces)
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/sev
head: c2106a231c2ba36ff9af50cdf2867b9a5f8150a6
commit: c2106a231c2ba36ff9af50cdf2867b9a5f8150a6 [55/55] x86/sev: Get the AP jump table address from secrets page
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220502/202205022233.XgNDR7WR-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=c2106a231c2ba36ff9af50cdf2867b9a5f8150a6
git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
git fetch --no-tags tip x86/sev
git checkout c2106a231c2ba36ff9af50cdf2867b9a5f8150a6
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/

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


sparse warnings: (new ones prefixed by >>)
>> arch/x86/kernel/sev.c:605:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got struct snp_secrets_page_layout *[assigned] layout @@
arch/x86/kernel/sev.c:605:17: sparse: expected void volatile [noderef] __iomem *addr
arch/x86/kernel/sev.c:605:17: sparse: got struct snp_secrets_page_layout *[assigned] layout

vim +605 arch/x86/kernel/sev.c

588
589 static u64 __init get_snp_jump_table_addr(void)
590 {
591 struct snp_secrets_page_layout *layout;
592 u64 pa, addr;
593
594 pa = get_secrets_page();
595 if (!pa)
596 return 0;
597
598 layout = (__force void *)ioremap_encrypted(pa, PAGE_SIZE);
599 if (!layout) {
600 pr_err("Unable to locate AP jump table address: failed to map the SNP secrets page.\n");
601 return 0;
602 }
603
604 addr = layout->os_area.ap_jump_table_pa;
> 605 iounmap(layout);
606
607 return addr;
608 }
609

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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