From 7135b921b32966d7602ede396b7286d372aee63f Mon Sep 17 00:00:00 2001 From: Aditya Gupta Date: Mon, 11 Sep 2023 14:44:09 +0530 Subject: powerpc: add `cur_cpu_spec` symbol to vmcoreinfo Presently, while reading a vmcore, makedumpfile uses `cur_cpu_spec.mmu_features` to decide whether the crashed system had RADIX MMU or not. Currently, makedumpfile fails to get the `cur_cpu_spec` symbol (unless a vmlinux is passed with the `-x` flag to makedumpfile), and hence assigns offsets and shifts (such as pgd_offset_l4) incorrecly considering MMU to be hash MMU. Add `cur_cpu_spec` symbol and offset of `mmu_features` in the `cpu_spec` struct, to VMCOREINFO, so that the symbol address and offset is accessible to makedumpfile, without needing the vmlinux file Signed-off-by: Aditya Gupta Reported-by: Sachin Sant Tested-by: Sachin Sant Signed-off-by: Michael Ellerman Link: https://msgid.link/20230911091409.415662-1-adityag@linux.ibm.com --- arch/powerpc/kexec/core.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/powerpc/kexec') diff --git a/arch/powerpc/kexec/core.c b/arch/powerpc/kexec/core.c index de64c7962991..369b8334a4f0 100644 --- a/arch/powerpc/kexec/core.c +++ b/arch/powerpc/kexec/core.c @@ -63,6 +63,8 @@ void arch_crash_save_vmcoreinfo(void) #ifndef CONFIG_NUMA VMCOREINFO_SYMBOL(contig_page_data); #endif + VMCOREINFO_SYMBOL(cur_cpu_spec); + VMCOREINFO_OFFSET(cpu_spec, mmu_features); #if defined(CONFIG_PPC64) && defined(CONFIG_SPARSEMEM_VMEMMAP) VMCOREINFO_SYMBOL(vmemmap_list); VMCOREINFO_SYMBOL(mmu_vmemmap_psize); -- cgit v1.2.3