From 1bc3b91aeed71a904e431d12ca90e9b6bcb42c91 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sat, 25 Jun 2005 14:58:01 -0700 Subject: [PATCH] crashdump: x86 crashkernel option This is the x86 implementation of the crashkernel option. It reserves a window of memory very early in the bootup process, so we never use it for anything but the kernel to switch to when the running kernel panics. In addition to reserving this memory a resource structure is registered so looking at /proc/iomem it is clear what happened to that memory. ISSUES: Is it possible to implement this in a architecture generic way? What should be done with architectures that always use an iommu and thus don't report their RAM memory resources in /proc/iomem? Signed-off-by: Eric Biederman Signed-off-by: Vivek Goyal Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/efi.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/i386/kernel/efi.c') diff --git a/arch/i386/kernel/efi.c b/arch/i386/kernel/efi.c index f732f427b418..385883ea8c19 100644 --- a/arch/i386/kernel/efi.c +++ b/arch/i386/kernel/efi.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include @@ -598,6 +599,9 @@ efi_initialize_iomem_resources(struct resource *code_resource, if (md->type == EFI_CONVENTIONAL_MEMORY) { request_resource(res, code_resource); request_resource(res, data_resource); +#ifdef CONFIG_KEXEC + request_resource(res, &crashk_res); +#endif } } } -- cgit v1.2.2