Hi, On 01/26/2016 03:43 PM, kbuild test robot wrote: > Hi Eric, > > [auto build test WARNING on v4.5-rc1] > [also build test WARNING on next-20160125] > [cannot apply to iommu/next] > [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] > > url: https://github.com/0day-ci/linux/commits/Eric-Auger/KVM-PCIe-MSI-passthrough-on-ARM-ARM64/20160126-211921 > config: i386-allmodconfig (attached as .config) > reproduce: > # save the attached .config to linux build tree > make ARCH=i386 > > All warnings (new ones prefixed by >>): > > drivers/vfio/pci/vfio_pci_intrs.c: In function 'vfio_set_mapped_msi_addr': >>> drivers/vfio/pci/vfio_pci_intrs.c:324:43: warning: left shift count >= width of type [-Wshift-count-overflow] > msi_addr = (phys_addr_t)(msg.address_hi) << 32 | > ^ >>> drivers/vfio/pci/vfio_pci_intrs.c:333:34: warning: right shift count >= width of type [-Wshift-count-overflow] > msg.address_hi = (u32)(msi_iova >> 32); I definitively need to revisit that code. I Better understand Alex' comment now :-( Thanks Eric > ^ > > vim +324 drivers/vfio/pci/vfio_pci_intrs.c > > 318 dma_addr_t msi_iova; > 319 struct vfio_group *group = vdev->vfio_group; > 320 struct msi_msg msg; > 321 int ret; > 322 > 323 get_cached_msi_msg(irq, &msg); > > 324 msi_addr = (phys_addr_t)(msg.address_hi) << 32 | > 325 (phys_addr_t)(msg.address_lo); > 326 > 327 ret = vfio_group_alloc_map_reserved_iova(group, msi_addr, > 328 IOMMU_WRITE, &msi_iova); > 329 if (ret) > 330 goto out; > 331 > 332 /* Re-program the msi-address with the iova */ > > 333 msg.address_hi = (u32)(msi_iova >> 32); > 334 msg.address_lo = (u32)(msi_iova & 0xffffffff); > 335 pci_write_msi_msg(irq, &msg); > 336 > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
