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test robot To: =?iso-8859-1?Q?C=E9dric?= Le Goater Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Michael Ellerman Subject: arch/powerpc/kvm/book3s_pr.c:660:22: sparse: sparse: cast to restricted __be32 Message-ID: <202112261550.gLvQAra0-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Cédric, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 438645193e59e91761ccb3fa55f6ce70b615ff93 commit: cb53a93e33e108bfec00a13cd12696e1c0ccc8b6 KVM: PPC: Book3S PR: Declare kvmppc_handle_exit_pr() date: 4 months ago config: powerpc64-randconfig-s032-20211226 (https://download.01.org/0day-ci/archive/20211226/202112261550.gLvQAra0-lkp@intel.com/config) compiler: powerpc64le-linux-gcc (GCC) 11.2.0 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-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cb53a93e33e108bfec00a13cd12696e1c0ccc8b6 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout cb53a93e33e108bfec00a13cd12696e1c0ccc8b6 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kvm/ drivers/misc/ drivers/pinctrl/nuvoton/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) >> arch/powerpc/kvm/book3s_pr.c:660:22: sparse: sparse: cast to restricted __be32 >> arch/powerpc/kvm/book3s_pr.c:661:33: sparse: sparse: invalid assignment: &= >> arch/powerpc/kvm/book3s_pr.c:661:33: sparse: left side has type unsigned int >> arch/powerpc/kvm/book3s_pr.c:661:33: sparse: right side has type restricted __be32 arch/powerpc/kvm/book3s_pr.c: note: in included file: arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:962:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] srr0 @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:962:1: sparse: expected unsigned long long [usertype] srr0 arch/powerpc/include/asm/kvm_ppc.h:962:1: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:962:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] srr0 @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:962:1: sparse: expected unsigned long long [usertype] srr0 arch/powerpc/include/asm/kvm_ppc.h:962:1: sparse: got restricted __le64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:963:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] srr1 @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:963:1: sparse: expected unsigned long long [usertype] srr1 arch/powerpc/include/asm/kvm_ppc.h:963:1: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:963:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] srr1 @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:963:1: sparse: expected unsigned long long [usertype] srr1 arch/powerpc/include/asm/kvm_ppc.h:963:1: sparse: got restricted __le64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] msr @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: expected unsigned long long [usertype] msr arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] msr @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: expected unsigned long long [usertype] msr arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: got restricted __le64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] msr @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: expected unsigned long long [usertype] msr arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] msr @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: expected unsigned long long [usertype] msr arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: got restricted __le64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] msr @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: expected unsigned long long [usertype] msr arch/powerpc/include/asm/kvm_ppc.h:970:39: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] msr @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: expected unsigned long long [usertype] msr arch/powerpc/include/asm/kvm_ppc.h:972:39: sparse: got restricted __le64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] dar @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: expected unsigned long long [usertype] dar arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] dar @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: expected unsigned long long [usertype] dar arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: got restricted __le64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __be64 arch/powerpc/include/asm/kvm_ppc.h:966:1: sparse: sparse: cast to restricted __le64 arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] dar @@ got restricted __be64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: expected unsigned long long [usertype] dar arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: got restricted __be64 [usertype] arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned long long [usertype] dar @@ got restricted __le64 [usertype] @@ arch/powerpc/include/asm/kvm_ppc.h:964:1: sparse: expected unsigned long long [usertype] dar vim +660 arch/powerpc/kvm/book3s_pr.c f05ed4d56e9cff Paul Mackerras 2011-06-29 630 f05ed4d56e9cff Paul Mackerras 2011-06-29 631 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To f05ed4d56e9cff Paul Mackerras 2011-06-29 632 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to f05ed4d56e9cff Paul Mackerras 2011-06-29 633 * emulate 32 bytes dcbz length. f05ed4d56e9cff Paul Mackerras 2011-06-29 634 * f05ed4d56e9cff Paul Mackerras 2011-06-29 635 * The Book3s_64 inventors also realized this case and implemented a special bit f05ed4d56e9cff Paul Mackerras 2011-06-29 636 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it. f05ed4d56e9cff Paul Mackerras 2011-06-29 637 * f05ed4d56e9cff Paul Mackerras 2011-06-29 638 * My approach here is to patch the dcbz instruction on executing pages. f05ed4d56e9cff Paul Mackerras 2011-06-29 639 */ f05ed4d56e9cff Paul Mackerras 2011-06-29 640 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte) f05ed4d56e9cff Paul Mackerras 2011-06-29 641 { f05ed4d56e9cff Paul Mackerras 2011-06-29 642 struct page *hpage; f05ed4d56e9cff Paul Mackerras 2011-06-29 643 u64 hpage_offset; f05ed4d56e9cff Paul Mackerras 2011-06-29 644 u32 *page; f05ed4d56e9cff Paul Mackerras 2011-06-29 645 int i; f05ed4d56e9cff Paul Mackerras 2011-06-29 646 f05ed4d56e9cff Paul Mackerras 2011-06-29 647 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT); 32cad84f44d186 Xiao Guangrong 2012-08-03 648 if (is_error_page(hpage)) f05ed4d56e9cff Paul Mackerras 2011-06-29 649 return; f05ed4d56e9cff Paul Mackerras 2011-06-29 650 f05ed4d56e9cff Paul Mackerras 2011-06-29 651 hpage_offset = pte->raddr & ~PAGE_MASK; f05ed4d56e9cff Paul Mackerras 2011-06-29 652 hpage_offset &= ~0xFFFULL; f05ed4d56e9cff Paul Mackerras 2011-06-29 653 hpage_offset /= 4; f05ed4d56e9cff Paul Mackerras 2011-06-29 654 f05ed4d56e9cff Paul Mackerras 2011-06-29 655 get_page(hpage); 2480b2089210de Cong Wang 2011-11-25 656 page = kmap_atomic(hpage); f05ed4d56e9cff Paul Mackerras 2011-06-29 657 f05ed4d56e9cff Paul Mackerras 2011-06-29 658 /* patch dcbz into reserved instruction, so we trap */ f05ed4d56e9cff Paul Mackerras 2011-06-29 659 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++) cd087eefe637d5 Alexander Graf 2014-04-24 @660 if ((be32_to_cpu(page[i]) & 0xff0007ff) == INS_DCBZ) cd087eefe637d5 Alexander Graf 2014-04-24 @661 page[i] &= cpu_to_be32(0xfffffff7); f05ed4d56e9cff Paul Mackerras 2011-06-29 662 2480b2089210de Cong Wang 2011-11-25 663 kunmap_atomic(page); f05ed4d56e9cff Paul Mackerras 2011-06-29 664 put_page(hpage); f05ed4d56e9cff Paul Mackerras 2011-06-29 665 } f05ed4d56e9cff Paul Mackerras 2011-06-29 666 :::::: The code at line 660 was first introduced by commit :::::: cd087eefe637d545345ea5f888d4ea4fe52e312c KVM: PPC: Book3S PR: Do dcbz32 patching with big endian instructions :::::: TO: Alexander Graf :::::: CC: Alexander Graf --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org