Hi, thank you for the patch.
On 2023/09/27 20:18, Song Shuai wrote: > These 2 patches add riscv64 support for makedumpfile: > > Patch1 - Add riscv64 support > =========================== > > This patch adds support for riscv64 in makedumpfile. > It implements the "vtop" for kenrel memory regions > and supports Sv39/Sv48/Sv57 page modes for RV64. Could I have a log of makedumpfile with --message-level 31 option for reference? e.g. makedumpfile -c -d 31 --message-level 31 vmcore dumpfile > mkdf.log (IIRC the kexec mail list doesn't accept attached files, so please send it off-list.) > > > Patch2 - riscv64: Correct the pfn_start for flatmem > ================================================== > > This patch temporarily fixes a issue of the tests about FLATMEM, > as the commit-msg says: > > To let info->max_mapnr indicte the direct max PFN and then This means "indicate", right? Thanks, Kazu > make the kdump header's max_mapnr_64 correct, riscv64 port > didn't define ARCH_PFN_OFFSET. > > As for FLATMEM type, the pfn region of mem_map_data should > be adjusted to start from info->phys_base instead of zero. > > Not taking other arches into consideration and test, so I simplely > judge the __riscv64__ instead of ARCH_PFN_OFFSET. Maybe we can improve it. > > > Tests > ===== > > With these 2 patches, the following tests had passed in RV64 Qemu virt > machine: > > Preparation: > ----------- > > 1. build kernel with FLATMEM and SPARSE memory models > 2. boot kernel with 3 different page-modes by setting nov4l/nov5l in cmdline > 3. panic kernel > > Tests: > ----- > > 1. create kdump-compressed file via this command > - `/mnt/mkdf_f -d31 -f -c /proc/vmcore /mnt/dump.file1` > - or with `--vtop` option to translate some typical addresses (like: > kernel_link_addr, vmalloc_start, page_offset) > > 2. start crash with kdump file and do some VTOPs > > > A test log: > ----------- > > # With the Sv57 and SPARSE_EXTREME kernel > # vtop the vmalloc start address -- 0xff20000000000000 > > > # /mnt/mkdf_f --vtop 0xff20000000000000 -d31 -f --non-mmap -c /proc/vmcore > /mnt/dump.file1 > > Translating virtual address ff20000000000000 to physical address. > VIRTUAL PHYSICAL > ff20000000000000 80087000 > > Copying data : [100.0 %] | > eta: 0s > > The dumpfile is saved to /mnt/dump.file1. > > makedumpfile Completed. > > # sudo ../crash/crash /home/song/9_linux/linux/00_rv_def/vmlinux > /tmp/hello/dump.file1 > ... > KERNEL: /home/song/9_linux/linux/00_rv_def/vmlinux > DUMPFILE: /tmp/hello/dump.file1 [PARTIAL DUMP] > CPUS: 2 > DATE: Wed Sep 27 18:37:45 CST 2023 > UPTIME: 00:00:18 > LOAD AVERAGE: 0.00, 0.00, 0.00 > TASKS: 55 > NODENAME: (none) > RELEASE: 6.6.0-rc1-00007-g22bfc766389c > VERSION: #1 SMP Mon Sep 25 19:29:05 CST 2023 > MACHINE: riscv64 (unknown Mhz) > MEMORY: 511.8 MB > PANIC: "Kernel panic - not syncing: sysrq triggered crash" > PID: 1 > COMMAND: "sh" > TASK: ff600000000e0000 [THREAD_INFO: ff600000000e0000] > CPU: 1 > STATE: TASK_RUNNING (PANIC) > > crash> vtop 0xff20000000000000 > VIRTUAL PHYSICAL > ff20000000000000 80087000 > > PGD: ffffffff814fa900 => 20010c01 > P4D: 0000000080043000 => 0000000020025401 > PUD: 0000000080095000 => 0000000020025801 > PMD: 0000000080096000 => 0000000020026001 > PTE: 80098000 => 20021ce7 > PAGE: 0000000080087000 > > PTE PHYSICAL FLAGS > 20021ce7 80087000 (PRESENT|READ|WRITE|GLOBAL|ACCESSED|DIRTY) > > PAGE PHYSICAL MAPPING INDEX CNT FLAGS > ff1c0000020021c0 80087000 0 0 1 0 // same as the > makedumpfile's vtop > > > Song Shuai (2): > Add riscv64 support > riscv64: Correct the pfn_start for flatmem > > Makefile | 2 +- > arch/riscv64.c | 219 +++++++++++++++++++++++++++++++++++++++++++++++++ > makedumpfile.c | 18 ++++ > makedumpfile.h | 107 ++++++++++++++++++++++++ > 4 files changed, 345 insertions(+), 1 deletion(-) > create mode 100644 arch/riscv64.c > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
