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* arch/x86/hyperv/irqdomain.c:124:30: sparse: sparse: invalid access past the end of 'dev_id' (4 8)
@ 2021-02-26  4:54 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-02-26  4:54 UTC (permalink / raw)
  To: kbuild

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Wei Liu <wei.liu@kernel.org>
CC: Sunil Muthuswamy <sunilmut@microsoft.com>
CC: Michael Kelley <mikelley@microsoft.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2c87f7a38f930ef6f6a7bdd04aeb82ce3971b54b
commit: e39397d1fd6851bef4dfb63a631b8e15d1f43329 x86/hyperv: implement an MSI domain for root partition
date:   2 weeks ago
:::::: branch date: 9 hours ago
:::::: commit date: 2 weeks ago
config: i386-randconfig-s001-20210226 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-229-g60c1f270-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e39397d1fd6851bef4dfb63a631b8e15d1f43329
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e39397d1fd6851bef4dfb63a631b8e15d1f43329
        # 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@intel.com>


"sparse warnings: (new ones prefixed by >>)"
   arch/x86/hyperv/irqdomain.c:27:18: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got void [noderef] __percpu ** @@
   arch/x86/hyperv/irqdomain.c:27:18: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/hyperv/irqdomain.c:27:18: sparse:     got void [noderef] __percpu **
   arch/x86/hyperv/irqdomain.c:27:15: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct hv_input_map_device_interrupt *input @@     got void [noderef] __percpu * @@
   arch/x86/hyperv/irqdomain.c:27:15: sparse:     expected struct hv_input_map_device_interrupt *input
   arch/x86/hyperv/irqdomain.c:27:15: sparse:     got void [noderef] __percpu *
   arch/x86/hyperv/irqdomain.c:28:19: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got void [noderef] __percpu ** @@
   arch/x86/hyperv/irqdomain.c:28:19: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/hyperv/irqdomain.c:28:19: sparse:     got void [noderef] __percpu **
   arch/x86/hyperv/irqdomain.c:28:16: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct hv_output_map_device_interrupt *output @@     got void [noderef] __percpu * @@
   arch/x86/hyperv/irqdomain.c:28:16: sparse:     expected struct hv_output_map_device_interrupt *output
   arch/x86/hyperv/irqdomain.c:28:16: sparse:     got void [noderef] __percpu *
   arch/x86/hyperv/irqdomain.c:80:18: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected void const [noderef] __percpu *__vpp_verify @@     got void [noderef] __percpu ** @@
   arch/x86/hyperv/irqdomain.c:80:18: sparse:     expected void const [noderef] __percpu *__vpp_verify
   arch/x86/hyperv/irqdomain.c:80:18: sparse:     got void [noderef] __percpu **
   arch/x86/hyperv/irqdomain.c:80:15: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct hv_input_unmap_device_interrupt *input @@     got void [noderef] __percpu * @@
   arch/x86/hyperv/irqdomain.c:80:15: sparse:     expected struct hv_input_unmap_device_interrupt *input
   arch/x86/hyperv/irqdomain.c:80:15: sparse:     got void [noderef] __percpu *
>> arch/x86/hyperv/irqdomain.c:124:30: sparse: sparse: invalid access past the end of 'dev_id' (4 8)

vim +/dev_id +124 arch/x86/hyperv/irqdomain.c

e39397d1fd6851 Wei Liu 2021-02-03  112  
e39397d1fd6851 Wei Liu 2021-02-03  113  static union hv_device_id hv_build_pci_dev_id(struct pci_dev *dev)
e39397d1fd6851 Wei Liu 2021-02-03  114  {
e39397d1fd6851 Wei Liu 2021-02-03  115  	union hv_device_id dev_id;
e39397d1fd6851 Wei Liu 2021-02-03  116  	struct rid_data data = {
e39397d1fd6851 Wei Liu 2021-02-03  117  		.bridge = NULL,
e39397d1fd6851 Wei Liu 2021-02-03  118  		.rid = PCI_DEVID(dev->bus->number, dev->devfn)
e39397d1fd6851 Wei Liu 2021-02-03  119  	};
e39397d1fd6851 Wei Liu 2021-02-03  120  
e39397d1fd6851 Wei Liu 2021-02-03  121  	pci_for_each_dma_alias(dev, get_rid_cb, &data);
e39397d1fd6851 Wei Liu 2021-02-03  122  
e39397d1fd6851 Wei Liu 2021-02-03  123  	dev_id.as_uint64 = 0;
e39397d1fd6851 Wei Liu 2021-02-03 @124  	dev_id.device_type = HV_DEVICE_TYPE_PCI;
e39397d1fd6851 Wei Liu 2021-02-03  125  	dev_id.pci.segment = pci_domain_nr(dev->bus);
e39397d1fd6851 Wei Liu 2021-02-03  126  
e39397d1fd6851 Wei Liu 2021-02-03  127  	dev_id.pci.bdf.bus = PCI_BUS_NUM(data.rid);
e39397d1fd6851 Wei Liu 2021-02-03  128  	dev_id.pci.bdf.device = PCI_SLOT(data.rid);
e39397d1fd6851 Wei Liu 2021-02-03  129  	dev_id.pci.bdf.function = PCI_FUNC(data.rid);
e39397d1fd6851 Wei Liu 2021-02-03  130  	dev_id.pci.source_shadow = HV_SOURCE_SHADOW_NONE;
e39397d1fd6851 Wei Liu 2021-02-03  131  
e39397d1fd6851 Wei Liu 2021-02-03  132  	if (data.bridge) {
e39397d1fd6851 Wei Liu 2021-02-03  133  		int pos;
e39397d1fd6851 Wei Liu 2021-02-03  134  
e39397d1fd6851 Wei Liu 2021-02-03  135  		/*
e39397d1fd6851 Wei Liu 2021-02-03  136  		 * Microsoft Hypervisor requires a bus range when the bridge is
e39397d1fd6851 Wei Liu 2021-02-03  137  		 * running in PCI-X mode.
e39397d1fd6851 Wei Liu 2021-02-03  138  		 *
e39397d1fd6851 Wei Liu 2021-02-03  139  		 * To distinguish conventional vs PCI-X bridge, we can check
e39397d1fd6851 Wei Liu 2021-02-03  140  		 * the bridge's PCI-X Secondary Status Register, Secondary Bus
e39397d1fd6851 Wei Liu 2021-02-03  141  		 * Mode and Frequency bits. See PCI Express to PCI/PCI-X Bridge
e39397d1fd6851 Wei Liu 2021-02-03  142  		 * Specification Revision 1.0 5.2.2.1.3.
e39397d1fd6851 Wei Liu 2021-02-03  143  		 *
e39397d1fd6851 Wei Liu 2021-02-03  144  		 * Value zero means it is in conventional mode, otherwise it is
e39397d1fd6851 Wei Liu 2021-02-03  145  		 * in PCI-X mode.
e39397d1fd6851 Wei Liu 2021-02-03  146  		 */
e39397d1fd6851 Wei Liu 2021-02-03  147  
e39397d1fd6851 Wei Liu 2021-02-03  148  		pos = pci_find_capability(data.bridge, PCI_CAP_ID_PCIX);
e39397d1fd6851 Wei Liu 2021-02-03  149  		if (pos) {
e39397d1fd6851 Wei Liu 2021-02-03  150  			u16 status;
e39397d1fd6851 Wei Liu 2021-02-03  151  
e39397d1fd6851 Wei Liu 2021-02-03  152  			pci_read_config_word(data.bridge, pos +
e39397d1fd6851 Wei Liu 2021-02-03  153  					PCI_X_BRIDGE_SSTATUS, &status);
e39397d1fd6851 Wei Liu 2021-02-03  154  
e39397d1fd6851 Wei Liu 2021-02-03  155  			if (status & PCI_X_SSTATUS_FREQ) {
e39397d1fd6851 Wei Liu 2021-02-03  156  				/* Non-zero, PCI-X mode */
e39397d1fd6851 Wei Liu 2021-02-03  157  				u8 sec_bus, sub_bus;
e39397d1fd6851 Wei Liu 2021-02-03  158  
e39397d1fd6851 Wei Liu 2021-02-03  159  				dev_id.pci.source_shadow = HV_SOURCE_SHADOW_BRIDGE_BUS_RANGE;
e39397d1fd6851 Wei Liu 2021-02-03  160  
e39397d1fd6851 Wei Liu 2021-02-03  161  				pci_read_config_byte(data.bridge, PCI_SECONDARY_BUS, &sec_bus);
e39397d1fd6851 Wei Liu 2021-02-03  162  				dev_id.pci.shadow_bus_range.secondary_bus = sec_bus;
e39397d1fd6851 Wei Liu 2021-02-03  163  				pci_read_config_byte(data.bridge, PCI_SUBORDINATE_BUS, &sub_bus);
e39397d1fd6851 Wei Liu 2021-02-03  164  				dev_id.pci.shadow_bus_range.subordinate_bus = sub_bus;
e39397d1fd6851 Wei Liu 2021-02-03  165  			}
e39397d1fd6851 Wei Liu 2021-02-03  166  		}
e39397d1fd6851 Wei Liu 2021-02-03  167  	}
e39397d1fd6851 Wei Liu 2021-02-03  168  
e39397d1fd6851 Wei Liu 2021-02-03  169  	return dev_id;
e39397d1fd6851 Wei Liu 2021-02-03  170  }
e39397d1fd6851 Wei Liu 2021-02-03  171  

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

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2021-02-26  4:54 arch/x86/hyperv/irqdomain.c:124:30: sparse: sparse: invalid access past the end of 'dev_id' (4 8) kernel test robot

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