On 16/06/16 14:33, Darrick J. Wong wrote: > Hi Aneesh, > > I noticed when trying out 4.7-rc3 on qemu-2.5 that the kernel no longer > boots. 4.6 booted just fine, so I bisected the kernel to the commit > 30bda41aba4efb2370c97e2cbe7385de93ccc372, which is "powerpc/mm: Drop WIMG in > favour of new constants". The changelog suggests that the KVM changes need > closer review, and here's an actual crash: > > (I can send libvirt's machine xml, .config, and full dmesg if that helps.) > > --Darrick
Looking at the address - 0xd000080080000010, looks like map_kernel_page followed by a fault here did not do the right thing. This EA range belongs to the io_remap range, IIUC. The only suspicious bits I could find are + /* + * if host is mapped cache inhibited, make sure hptel also have + * cache inhibited. + */ + if (wimg & HPTE_R_W) /* FIXME!! is this ok for all guest. ? */ + return false; Aneesh also posted some changes to hpte_update and hpte_updatepp that might be interesting Balbir _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
