Re: [Crash-utility] [PATCH V3 0/9] Support RISCV64 arch and common commands

Hi lijiang On Mon, Aug 22, 2022 at 3:56 AM lijiang <lijiang(a)redhat.com&gt; wrote: > Hi, Xianting > Thank you for the update. > On Sat, Aug 13, 2022 at 11:18 AM Xianting Tian <xianting.tian(a)linux.alibaba.com&gt; wrote: >> This series of patches are for Crash-utility tool, it make crash tool support >> RISCV64 arch and the common commands(*, bt, p, rd, mod, log, set, struct, task, >> dis, help -r, help -m, and so on). >> >> To make the crash tool work normally for RISCV64 arch, we need a Linux kernel >> patch, which exports the kernel virtual memory layout, va_bits, phys_ram_base >> to vmcoreinfo, it can simplify the development of crash tool. >> >> The Linux kernel patch set: >> https://lore.kernel.org/linux-riscv/20220811074150.3020189-1-xianting.tia... >> [ Patch 1 ~ 4 already merged to Linux for-next branch, targeted for 5.20; >> Patch 5, 6 already merged to Palmer's riscv-crash branch: >> https://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux.git/log/?h=r... ] >> > Can you also help to share the patch link for kexec-tools? Or share your loading steps and generate a vmcore in riscv64 system? > > I tried it with kexec-tools and got the following error: > > [root@fedora-riscv kexec-tools]# ./configure > checking for gcc... gcc > checking whether the C compiler works... yes > checking for C compiler default output file name... a.out > checking for suffix of executables... > checking whether we are cross compiling... no > checking for suffix of object files... o > checking whether we are using the GNU C compiler... yes > checking whether gcc accepts -g... yes > checking for gcc option to accept ISO C89... none needed > checking build system type... riscv64-unknown-linux-gnu > checking host system type... riscv64-unknown-linux-gnu > checking target system type... riscv64-unknown-linux-gnu > configure: error: unsupported architecture riscv64 > > Thanks. > Lianbo > >> This series of patches are tested on QEMU RISCV64 env and SoC platform of >> T-head Xuantie 910 RISCV64 CPU. >> >> ==================================== >> Some test examples list as below >> ==================================== >> ... ... >> KERNEL: vmlinux >> DUMPFILE: vmcore >> CPUS: 1 >> DATE: Fri Jul 15 10:24:25 CST 2022 >> UPTIME: 00:00:33 >> LOAD AVERAGE: 0.05, 0.01, 0.00 >> TASKS: 41 >> NODENAME: buildroot >> RELEASE: 5.18.9 >> VERSION: #30 SMP Fri Jul 15 09:47:03 CST 2022 >> MACHINE: riscv64 (unknown Mhz) >> MEMORY: 1 GB >> PANIC: "Kernel panic - not syncing: sysrq triggered crash" >> PID: 113 >> COMMAND: "sh" >> TASK: ff60000002269600 [THREAD_INFO: ff60000002269600] >> CPU: 0 >> STATE: TASK_RUNNING (PANIC) >> >> carsh> >> >> crash> p mem_map >> mem_map = $1 = (struct page *) 0xff6000003effbf00 >> >> crash> p /x *(struct page *) 0xff6000003effbf00 >> $5 = { >> flags = 0x1000, >> { >> { >> { >> lru = { >> next = 0xff6000003effbf08, >> prev = 0xff6000003effbf08 >> }, >> { >> __filler = 0xff6000003effbf08, >> mlock_count = 0x3effbf08 >> } >> }, >> mapping = 0x0, >> index = 0x0, >> private = 0x0 >> }, >> ... ... >> >> crash> mod >> MODULE NAME BASE SIZE OBJECT FILE >> ffffffff0113e740 nvme_core ffffffff01133000 98304 (not loaded) [CONFIG_KALLSYMS] >> ffffffff011542c0 nvme ffffffff0114c000 61440 (not loaded) [CONFIG_KALLSYMS] >> >> crash> rd ffffffff0113e740 8 >> ffffffff0113e740: 0000000000000000 ffffffff810874f8 .........t...... >> ffffffff0113e750: ffffffff011542c8 726f635f656d766e .B......nvme_cor >> ffffffff0113e760: 0000000000000065 0000000000000000 e............... >> ffffffff0113e770: 0000000000000000 0000000000000000 ................ >> >> crash> vtop ffffffff0113e740 >> VIRTUAL PHYSICAL >> ffffffff0113e740 8254d740 >> >> PGD: ffffffff810e9ff8 => 2ffff001 >> P4D: 0000000000000000 => 000000002fffec01 >> PUD: 00005605c2957470 => 0000000020949801 >> PMD: 00007fff7f1750c0 => 0000000020947401 >> PTE: 0 => 209534e7 >> PAGE: 000000008254d000 >> >> PTE PHYSICAL FLAGS >> 209534e7 8254d000 (PRESENT|READ|WRITE|GLOBAL|ACCESSED|DIRTY) >> >> PAGE PHYSICAL MAPPING INDEX CNT FLAGS >> ff6000003f0777d8 8254d000 0 0 1 0 >> >> crash> bt >> PID: 113 TASK: ff6000000226c200 CPU: 0 COMMAND: "sh" >> #0 [ff20000010333b90] riscv_crash_save_regs at ffffffff800078f8 >> #1 [ff20000010333cf0] panic at ffffffff806578c6 >> #2 [ff20000010333d50] sysrq_reset_seq_param_set at ffffffff8038c03c >> #3 [ff20000010333da0] __handle_sysrq at ffffffff8038c604 >> #4 [ff20000010333e00] write_sysrq_trigger at ffffffff8038cae4 >> #5 [ff20000010333e20] proc_reg_write at ffffffff801b7ee8 >> #6 [ff20000010333e40] vfs_write at ffffffff80152bb2 >> #7 [ff20000010333e80] ksys_write at ffffffff80152eda >> #8 [ff20000010333ed0] sys_write at ffffffff80152f52 >> >> ------- >> Changes V1 -> V2: >> 1, Do the below fixes based on HAGIO KAZUHITO's comments: >> Fix build warnings, >> Use MACRO for Linux version, >> Add description of x86_64 binary for riscv64 in README, >> Fix build error for the "sticky" target for build on x86_64, >> Fix the mixed indent. >> 2, Add 'help -m/M' support patch to this patch set. >> 3, Support native compiling approach, which means the host OS distro >> is also a riscv64 (lp64d) Linux, based on Yixun Lan's comments. >> 4, Use __riscv and __riscv_xlen instead of __riscv64__ based on Yixun Lan's comments. >> Changes V2 -> V3: >> 1, Fix coding style, avoid including the header twice, move free() to right place, >> introduce VM_FLAGS and so on based on Li Jiang's comments. >> 2, Adjust the implementation of riscv64_verify_symbol(refer to the logic of x86_64_verify_symbol) >> as KSYMS_START isn't set when verify symbol in some case. >> >> >> Xianting Tian (9): >> Add RISCV64 framework code support >> RISCV64: Make crash tool enter command line and support some commands >> RISCV64: Add 'dis' command support >> RISCV64: Add 'irq' command support >> RISCV64: Add 'bt' command support >> RISCV64: Add 'help -r' command support >> RISCV64: Add 'help -m/M' command support >> RISCV64: Add 'mach' command support >> RISCV64: Add the implementation of symbol verify >> >> Makefile | 7 +- >> README | 4 +- >> configure.c | 43 +- >> defs.h | 252 +++++++- >> diskdump.c | 21 +- >> help.c | 2 +- >> lkcd_vmdump_v1.h | 8 +- >> lkcd_vmdump_v2_v3.h | 8 +- >> netdump.c | 22 +- >> ramdump.c | 2 + >> riscv64.c | 1491 +++++++++++++++++++++++++++++++++++++++++++ >> symbols.c | 10 + >> 12 files changed, 1848 insertions(+), 22 deletions(-) >> create mode 100644 riscv64.c >> >> -- >> 2.17.1 >> FYI, take a look at lists.infradead.org/pipermail/linux-riscv/2021-October/008773.html also need this extra fix lists.infradead.org/pipermail/linux-riscv/2022-August/018398.html and just follow normal scheme to use kexec + crash, there is nothing different

Yixun