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author | Andre Detsch <adetsch@br.ibm.com> | 2007-07-20 21:39:27 +0200 |
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committer | Arnd Bergmann <arnd@klappe.arndb.de> | 2007-07-20 21:41:43 +0200 |
commit | 8d2655e621bfc3c3f925016f881a36739d479f69 (patch) | |
tree | 773d3f13c31850a719832bca93fd0d27ce1a9d8b | |
parent | dbdf04c40161f81d74e27f04e201acb3a5dfad69 (diff) | |
download | op-kernel-dev-8d2655e621bfc3c3f925016f881a36739d479f69.zip op-kernel-dev-8d2655e621bfc3c3f925016f881a36739d479f69.tar.gz |
[CELL] saving spus information for kexec crash
This patch adds support for investigating spus information after a
kernel crash event, through kdump vmcore file.
Implementation is based on xmon code, but the new functionality was
kept independent from xmon.
Signed-off-by: Lucio Jose Herculano Correia <luciojhc@br.ibm.com>
Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
-rw-r--r-- | arch/powerpc/kernel/crash.c | 67 | ||||
-rw-r--r-- | arch/powerpc/platforms/cell/spu_base.c | 2 | ||||
-rw-r--r-- | include/asm-powerpc/spu.h | 8 |
3 files changed, 76 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c index d3f2080..37658ea 100644 --- a/arch/powerpc/kernel/crash.c +++ b/arch/powerpc/kernel/crash.c @@ -219,6 +219,72 @@ void crash_kexec_secondary(struct pt_regs *regs) cpus_in_sr = CPU_MASK_NONE; } #endif +#ifdef CONFIG_SPU_BASE + +#include <asm/spu.h> +#include <asm/spu_priv1.h> + +struct crash_spu_info { + struct spu *spu; + u32 saved_spu_runcntl_RW; + u32 saved_spu_status_R; + u32 saved_spu_npc_RW; + u64 saved_mfc_sr1_RW; + u64 saved_mfc_dar; + u64 saved_mfc_dsisr; +}; + +#define CRASH_NUM_SPUS 16 /* Enough for current hardware */ +static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS]; + +static void crash_kexec_stop_spus(void) +{ + struct spu *spu; + int i; + u64 tmp; + + for (i = 0; i < CRASH_NUM_SPUS; i++) { + if (!crash_spu_info[i].spu) + continue; + + spu = crash_spu_info[i].spu; + + crash_spu_info[i].saved_spu_runcntl_RW = + in_be32(&spu->problem->spu_runcntl_RW); + crash_spu_info[i].saved_spu_status_R = + in_be32(&spu->problem->spu_status_R); + crash_spu_info[i].saved_spu_npc_RW = + in_be32(&spu->problem->spu_npc_RW); + + crash_spu_info[i].saved_mfc_dar = spu_mfc_dar_get(spu); + crash_spu_info[i].saved_mfc_dsisr = spu_mfc_dsisr_get(spu); + tmp = spu_mfc_sr1_get(spu); + crash_spu_info[i].saved_mfc_sr1_RW = tmp; + + tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK; + spu_mfc_sr1_set(spu, tmp); + + __delay(200); + } +} + +void crash_register_spus(struct list_head *list) +{ + struct spu *spu; + + list_for_each_entry(spu, list, full_list) { + if (WARN_ON(spu->number >= CRASH_NUM_SPUS)) + continue; + + crash_spu_info[spu->number].spu = spu; + } +} + +#else +static inline void crash_kexec_stop_spus(void) +{ +} +#endif /* CONFIG_SPU_BASE */ void default_machine_crash_shutdown(struct pt_regs *regs) { @@ -254,6 +320,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs) crash_save_cpu(regs, crashing_cpu); crash_kexec_prepare_cpus(crashing_cpu); cpu_set(crashing_cpu, cpus_in_crash); + crash_kexec_stop_spus(); if (ppc_md.kexec_cpu_down) ppc_md.kexec_cpu_down(1, 0); } diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c index 96a8f60..c563066 100644 --- a/arch/powerpc/platforms/cell/spu_base.c +++ b/arch/powerpc/platforms/cell/spu_base.c @@ -676,7 +676,7 @@ static int __init init_spu_base(void) } xmon_register_spus(&spu_full_list); - + crash_register_spus(&spu_full_list); spu_add_sysdev_attr(&attr_stat); return 0; diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h index eedc828..42d88a6 100644 --- a/include/asm-powerpc/spu.h +++ b/include/asm-powerpc/spu.h @@ -188,6 +188,14 @@ int spu_irq_class_0_bottom(struct spu *spu); int spu_irq_class_1_bottom(struct spu *spu); void spu_irq_setaffinity(struct spu *spu, int cpu); +#ifdef CONFIG_KEXEC +void crash_register_spus(struct list_head *list); +#else +static inline void crash_register_spus(struct list_head *list) +{ +} +#endif + extern void spu_invalidate_slbs(struct spu *spu); extern void spu_associate_mm(struct spu *spu, struct mm_struct *mm); |