linux-kernel - [tip:x86/sev 55/55] arch/x86/kernel/sev.c:605:17: sparse: sparse: incorrect type in argument 1 (different address spaces)

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Date:   Mon, 2 May 2022 22:19:04 +0800
From:   kernel test robot <lkp@...el.com>
To:     Brijesh Singh <brijesh.singh@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        x86@...nel.org, Borislav Petkov <bp@...e.de>,
        Michael Roth <michael.roth@....com>
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@...el.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	

-- 
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