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powerpc/kdump: Adding symbols in vmcoreinfo to facilitate dump filtering
When CONFIG_SPARSEMEM_VMEMMAP option is used in kernel, makedumpfile fails to filter vmcore dump as it fails to do vmemmap translations. So far dump filtering on ppc64 never had to deal with vmemmap addresses seperately as vmemmap regions where mapped in zone normal. But with the inclusion of CONFIG_SPARSEMEM_VMEMMAP config option in kernel, this vmemmap address translation support becomes necessary for dump filtering. For vmemmap adress translation, few kernel symbols are needed by dump filtering tool. This patch adds those symbols to vmcoreinfo, which a dump filtering tool can use for filtering the kernel dump. Tested this changes successfully with makedumpfile tool that supports vmemmap to physical address translation outside zone normal. [ Removed unneeded #ifdef as suggested by Michael Ellerman --BenH ] Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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2 changed files with 13 additions and 0 deletions
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@ -16,6 +16,7 @@ struct vmemmap_backing {
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unsigned long phys;
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unsigned long virt_addr;
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};
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extern struct vmemmap_backing *vmemmap_list;
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/*
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* Functions that deal with pagetables that could be at any level of
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@ -18,6 +18,7 @@
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#include <linux/ftrace.h>
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#include <asm/machdep.h>
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#include <asm/pgalloc.h>
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#include <asm/prom.h>
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#include <asm/sections.h>
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@ -75,6 +76,17 @@ void arch_crash_save_vmcoreinfo(void)
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#ifndef CONFIG_NEED_MULTIPLE_NODES
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VMCOREINFO_SYMBOL(contig_page_data);
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#endif
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#if defined(CONFIG_PPC64) && defined(CONFIG_SPARSEMEM_VMEMMAP)
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VMCOREINFO_SYMBOL(vmemmap_list);
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VMCOREINFO_SYMBOL(mmu_vmemmap_psize);
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VMCOREINFO_SYMBOL(mmu_psize_defs);
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VMCOREINFO_STRUCT_SIZE(vmemmap_backing);
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VMCOREINFO_OFFSET(vmemmap_backing, list);
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VMCOREINFO_OFFSET(vmemmap_backing, phys);
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VMCOREINFO_OFFSET(vmemmap_backing, virt_addr);
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VMCOREINFO_STRUCT_SIZE(mmu_psize_def);
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VMCOREINFO_OFFSET(mmu_psize_def, shift);
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#endif
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}
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/*
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