diff options
| author | Hari Bathini <hbathini@linux.vnet.ibm.com> | 2019-09-11 20:26:33 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-09-14 00:04:45 +1000 |
| commit | 6f713d18144ce86c9f01cdf64222d6339e26129e (patch) | |
| tree | f27f63ee129d15bc3d226baa0b8564213d956a01 /arch/powerpc/platforms/powernv/opal-fadump.h | |
| parent | 58cf055df47bb115e7c1533eec2a8f66639b80e3 (diff) | |
powerpc/opalcore: export /sys/firmware/opal/core for analysing opal crashes
Export /sys/firmware/opal/core file to analyze opal crashes. Since OPAL
core can be generated independent of CONFIG_FA_DUMP support in kernel,
add this support under a new kernel config option CONFIG_OPAL_CORE.
Also, avoid code duplication by moving common code used while exporting
/proc/vmcore and/or /sys/firmware/opal/core file(s).
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821378503.5656.3693769384945087756.stgit@hbathini.in.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal-fadump.h')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-fadump.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.h b/arch/powerpc/platforms/powernv/opal-fadump.h index c0b5d6e42ba6..d0e17d6a2b5c 100644 --- a/arch/powerpc/platforms/powernv/opal-fadump.h +++ b/arch/powerpc/platforms/powernv/opal-fadump.h @@ -8,6 +8,8 @@ #ifndef _POWERNV_OPAL_FADUMP_H #define _POWERNV_OPAL_FADUMP_H +#include <asm/reg.h> + /* * OPAL FADump metadata structure format version * @@ -77,4 +79,64 @@ struct hdat_fadump_reg_entry { __be64 reg_val; } __packed; +static inline void opal_fadump_set_regval_regnum(struct pt_regs *regs, + u32 reg_type, u32 reg_num, + u64 reg_val) +{ + if (reg_type == HDAT_FADUMP_REG_TYPE_GPR) { + if (reg_num < 32) + regs->gpr[reg_num] = reg_val; + return; + } + + switch (reg_num) { + case SPRN_CTR: + regs->ctr = reg_val; + break; + case SPRN_LR: + regs->link = reg_val; + break; + case SPRN_XER: + regs->xer = reg_val; + break; + case SPRN_DAR: + regs->dar = reg_val; + break; + case SPRN_DSISR: + regs->dsisr = reg_val; + break; + case HDAT_FADUMP_REG_ID_NIP: + regs->nip = reg_val; + break; + case HDAT_FADUMP_REG_ID_MSR: + regs->msr = reg_val; + break; + case HDAT_FADUMP_REG_ID_CCR: + regs->ccr = reg_val; + break; + } +} + +static inline void opal_fadump_read_regs(char *bufp, unsigned int regs_cnt, + unsigned int reg_entry_size, + bool cpu_endian, + struct pt_regs *regs) +{ + struct hdat_fadump_reg_entry *reg_entry; + u64 val; + int i; + + memset(regs, 0, sizeof(struct pt_regs)); + + for (i = 0; i < regs_cnt; i++, bufp += reg_entry_size) { + reg_entry = (struct hdat_fadump_reg_entry *)bufp; + val = (cpu_endian ? be64_to_cpu(reg_entry->reg_val) : + reg_entry->reg_val); + opal_fadump_set_regval_regnum(regs, + be32_to_cpu(reg_entry->reg_type), + be32_to_cpu(reg_entry->reg_num), + val); + } +} + #endif /* _POWERNV_OPAL_FADUMP_H */ |