Messages in this thread Patch in this message | | | Date | Wed, 26 Aug 2009 23:16:42 -0400 | From | Amerigo Wang <> | Subject | [Patch 6/8] powerpc: implement crashkernel=auto |
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Since in patch 2/8 we already implement the generic part, this will add the rest part for powerpc.
Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: M. Mohan Kumar <mohan@in.ibm.com> Cc: Michael Ellerman <michael@ellerman.id.au>
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Index: linux-2.6/arch/powerpc/include/asm/kexec.h =================================================================== --- linux-2.6.orig/arch/powerpc/include/asm/kexec.h +++ linux-2.6/arch/powerpc/include/asm/kexec.h @@ -39,6 +39,45 @@ typedef void (*crash_shutdown_t)(void); #ifdef CONFIG_KEXEC +#ifdef CONFIG_KEXEC_AUTO_RESERVE + +#ifndef KEXEC_AUTO_THRESHOLD +#define KEXEC_AUTO_THRESHOLD (1ULL<<31) /* 2G */ +#endif + +#ifndef arch_default_crash_base +static inline +unsigned long long arch_default_crash_base(void) +{ + return KDUMP_KERNELBASE; +} +#define arch_default_crash_base arch_default_crash_base +#endif + +#ifndef arch_default_crash_size +static inline +unsigned long long arch_default_crash_size(unsigned long long total_size) +{ + if (total_size < KEXEC_AUTO_THRESHOLD) + return 0; + if (total_size < (1ULL<<32)) + return 1ULL<<27; + else { +#ifdef CONFIG_64BIT + if (total_size > (1ULL<<37)) /* 128G */ + return 1ULL<<32; /* 4G */ + return 1ULL<<ilog2(roundup(total_size/32, 1ULL<<21)); +#else + return 1ULL<<28; +#endif + } +} +#define arch_default_crash_size arch_default_crash_size +#endif + +#endif +#include <asm-generic/kexec.h> + /* * This function is responsible for capturing register states if coming * via panic or invoking dump using sysrq-trigger.
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