linux-kernel - arch/powerpc/kvm/book3s_xive.c:51:15: sparse: sparse: cast to restricted _

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Date:   Tue, 14 Jun 2022 23:58:24 +0800
From:   kernel test robot <lkp@...el.com>
To:     Alexey Kardashevskiy <aik@...abs.ru>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: arch/powerpc/kvm/book3s_xive.c:51:15: sparse: sparse: cast to
 restricted __be16

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3
commit: b22af9041927075b82bcaf4b6c7a354688198d47 KVM: PPC: Book3s: Remove real mode interrupt controller hcalls handlers
date:   4 weeks ago
config: powerpc64-randconfig-s032-20220613 (https://download.01.org/0day-ci/archive/20220614/202206142322.McgZGdEj-lkp@intel.com/config)
compiler: powerpc64le-linux-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-30-g92122700-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b22af9041927075b82bcaf4b6c7a354688198d47
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b22af9041927075b82bcaf4b6c7a354688198d47
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kvm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
>> arch/powerpc/kvm/book3s_xive.c:51:15: sparse: sparse: cast to restricted __be16
>> arch/powerpc/kvm/book3s_xive.c:357:41: sparse: sparse: incorrect type in initializer (different base types) @@     expected restricted __be64 [usertype] qw1 @@     got unsigned long @@
   arch/powerpc/kvm/book3s_xive.c:357:41: sparse:     expected restricted __be64 [usertype] qw1
   arch/powerpc/kvm/book3s_xive.c:357:41: sparse:     got unsigned long
   arch/powerpc/kvm/book3s_xive.c:701:57: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected unsigned long v @@     got restricted __be64 [usertype] w01 @@
   arch/powerpc/kvm/book3s_xive.c:701:57: sparse:     expected unsigned long v
   arch/powerpc/kvm/book3s_xive.c:701:57: sparse:     got restricted __be64 [usertype] w01
   arch/powerpc/kvm/book3s_xive.c:702:32: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected unsigned int v @@     got restricted __be32 [usertype] xive_cam_word @@
   arch/powerpc/kvm/book3s_xive.c:702:32: sparse:     expected unsigned int v
   arch/powerpc/kvm/book3s_xive.c:702:32: sparse:     got restricted __be32 [usertype] xive_cam_word
   arch/powerpc/kvm/book3s_xive.c:774:49: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be64 [usertype] w01 @@     got unsigned long @@
   arch/powerpc/kvm/book3s_xive.c:774:49: sparse:     expected restricted __be64 [usertype] w01
   arch/powerpc/kvm/book3s_xive.c:774:49: sparse:     got unsigned long

vim +51 arch/powerpc/kvm/book3s_xive.c

    38	
    39	static void xive_vm_ack_pending(struct kvmppc_xive_vcpu *xc)
    40	{
    41		u8 cppr;
    42		u16 ack;
    43	
    44		/*
    45		 * Ensure any previous store to CPPR is ordered vs.
    46		 * the subsequent loads from PIPR or ACK.
    47		 */
    48		eieio();
    49	
    50		/* Perform the acknowledge OS to register cycle. */
  > 51		ack = be16_to_cpu(__raw_readw(xive_tima + TM_SPC_ACK_OS_REG));
    52	
    53		/* Synchronize subsequent queue accesses */
    54		mb();
    55	
    56		/* XXX Check grouping level */
    57	
    58		/* Anything ? */
    59		if (!((ack >> 8) & TM_QW1_NSR_EO))
    60			return;
    61	
    62		/* Grab CPPR of the most favored pending interrupt */
    63		cppr = ack & 0xff;
    64		if (cppr < 8)
    65			xc->pending |= 1 << cppr;
    66	
    67		/* Check consistency */
    68		if (cppr >= xc->hw_cppr)
    69			pr_warn("KVM-XIVE: CPU %d odd ack CPPR, got %d at %d\n",
    70				smp_processor_id(), cppr, xc->hw_cppr);
    71	
    72		/*
    73		 * Update our image of the HW CPPR. We don't yet modify
    74		 * xc->cppr, this will be done as we scan for interrupts
    75		 * in the queues.
    76		 */
    77		xc->hw_cppr = cppr;
    78	}
    79	

-- 
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https://01.org/lkp