Hi Alexander, Thanks for the patchset. I am not sure why this new patchset is needed for makedumpfile upstream - if you need a separate patchset for Yocto please feel free to submit it to the Yocto list and Cc us. However for upstream makedumpfile project these are _probably_ not required - I have tested my patch on several arm64 boards and it works fine there. I will send the next version of my patch once I am back from my holidays later this week. If you see any breakage with the same, please feel free to report here with relevant logs and I can help further Thanks, Bhupesh On Mon, Nov 23, 2020 at 10:10 AM Alexander Kamensky <alexander.kamensky42@xxxxxxxxx> wrote: > > Hi Kazu, Bhupesh, > > I am hitting the linear mapping swap issue with makedumpfile failing on > arm64 Yocto Project qemuarm64 machine with 5.8 kernel as it was discussed > several times on this mailing list: > > root@qemuarm64:~# makedumpfile -c -F /proc/vmcore > /dev/null > readpage_elf: Attempt to read non-existent page at 0x0. > readmem: type_addr: 1, addr:440, size:8 > vaddr_to_paddr_arm64: Can't read pmd > readmem: Can't convert a virtual address(ffffffc01107f94c) to physical address. > readmem: type_addr: 0, addr:ffffffc01107f94c, size:390 > check_release: Can't get the address of system_utsname. > > I've have tried Bhupesh's remaining third patch [1] from [2] series, > it does help. But I am a bit hesitant to submit it to the Yocto Project, > since Kazu pointed out [3] that this patch uses current kernel version to > make decision how __pa is handled and it may mismatch the version where > vmcore was collected, and in such case it may not operate correctly. > > In this RFC series I have tried to implement Kazu's suggestion and use > kernel version retrieved from OSRELEASE string from vmcoreinfo note. I > wonder whether it will help to merge arm64 5.4+ makedumpfile fix? Is > there anything else outstanding that prevents such merge? > > My RFC patches series does include Bhupesh's patch [1], and I posted > my modifications on top of it as separate patch for readability. > > Thanks, > Alexander > > [1] http://lists.infradead.org/pipermail/kexec/2020-September/021336.html > [2] http://lists.infradead.org/pipermail/kexec/2020-September/021333.html > [3] http://lists.infradead.org/pipermail/kexec/2020-September/021488.html > > Alexander Kamensky (2): > added way to determine kernel version that vmcore is from > arm64: use kernel version from OSRELEASE to determine linear mapping > position > > Bhupesh Sharma (1): > makedumpfile/arm64: Add support for ARMv8.2-LVA (52-bit kernel VA > support) > > arch/arm64.c | 229 ++++++++++++++++++++++++++++++++++++++++++------- > common.h | 10 +++ > makedumpfile.c | 23 +++++ > makedumpfile.h | 6 +- > 4 files changed, 234 insertions(+), 34 deletions(-) > > -- > 2.26.2 > > > _______________________________________________ > kexec mailing list > kexec@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/kexec _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
