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authorHari Bathini <hbathini@linux.vnet.ibm.com>2013-11-15 17:31:32 (GMT)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-11-25 00:50:12 (GMT)
commit8ff812719ac73ef9428b788e210221c8d87b2a8c (patch)
treec386d128f3caf337ac8b89f950181dfcf596de2e /arch/powerpc/include
parent962bc221c3b1d63a461f8065bfb37122ce660119 (diff)
downloadlinux-fsl-qoriq-8ff812719ac73ef9428b788e210221c8d87b2a8c.tar.xz
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>
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/pgalloc-64.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgalloc-64.h b/arch/powerpc/include/asm/pgalloc-64.h
index 16cb92d..6940128 100644
--- a/arch/powerpc/include/asm/pgalloc-64.h
+++ b/arch/powerpc/include/asm/pgalloc-64.h
@@ -16,6 +16,7 @@ struct vmemmap_backing {
unsigned long phys;
unsigned long virt_addr;
};
+extern struct vmemmap_backing *vmemmap_list;
/*
* Functions that deal with pagetables that could be at any level of