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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-19 15:38:41 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-19 15:38:41 -0700 |
commit | d5e2d00898bdfed9586472679760fc81a2ca2d02 (patch) | |
tree | 55ac781983bf7144230ad8a5a995ce02b6ac39a1 /arch/powerpc/xmon/xmon.c | |
parent | Merge tag 'devicetree-for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux (diff) | |
parent | powerpc: Fix unrecoverable SLB miss during restore_math() (diff) | |
download | linux-dev-d5e2d00898bdfed9586472679760fc81a2ca2d02.tar.xz linux-dev-d5e2d00898bdfed9586472679760fc81a2ca2d02.zip |
Merge tag 'powerpc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
"This was delayed a day or two by some build-breakage on old toolchains
which we've now fixed.
There's two PCI commits both acked by Bjorn.
There's one commit to mm/hugepage.c which is (co)authored by Kirill.
Highlights:
- Restructure Linux PTE on Book3S/64 to Radix format from Paul
Mackerras
- Book3s 64 MMU cleanup in preparation for Radix MMU from Aneesh
Kumar K.V
- Add POWER9 cputable entry from Michael Neuling
- FPU/Altivec/VSX save/restore optimisations from Cyril Bur
- Add support for new ftrace ABI on ppc64le from Torsten Duwe
Various cleanups & minor fixes from:
- Adam Buchbinder, Andrew Donnellan, Balbir Singh, Christophe Leroy,
Cyril Bur, Luis Henriques, Madhavan Srinivasan, Pan Xinhui, Russell
Currey, Sukadev Bhattiprolu, Suraj Jitindar Singh.
General:
- atomics: Allow architectures to define their own __atomic_op_*
helpers from Boqun Feng
- Implement atomic{, 64}_*_return_* variants and acquire/release/
relaxed variants for (cmp)xchg from Boqun Feng
- Add powernv_defconfig from Jeremy Kerr
- Fix BUG_ON() reporting in real mode from Balbir Singh
- Add xmon command to dump OPAL msglog from Andrew Donnellan
- Add xmon command to dump process/task similar to ps(1) from Douglas
Miller
- Clean up memory hotplug failure paths from David Gibson
pci/eeh:
- Redesign SR-IOV on PowerNV to give absolute isolation between VFs
from Wei Yang.
- EEH Support for SRIOV VFs from Wei Yang and Gavin Shan.
- PCI/IOV: Rename and export virtfn_{add, remove} from Wei Yang
- PCI: Add pcibios_bus_add_device() weak function from Wei Yang
- MAINTAINERS: Update EEH details and maintainership from Russell
Currey
cxl:
- Support added to the CXL driver for running on both bare-metal and
hypervisor systems, from Christophe Lombard and Frederic Barrat.
- Ignore probes for virtual afu pci devices from Vaibhav Jain
perf:
- Export Power8 generic and cache events to sysfs from Sukadev
Bhattiprolu
- hv-24x7: Fix usage with chip events, display change in counter
values, display domain indices in sysfs, eliminate domain suffix in
event names, from Sukadev Bhattiprolu
Freescale:
- Updates from Scott: "Highlights include 8xx optimizations, 32-bit
checksum optimizations, 86xx consolidation, e5500/e6500 cpu
hotplug, more fman and other dt bits, and minor fixes/cleanup"
* tag 'powerpc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (179 commits)
powerpc: Fix unrecoverable SLB miss during restore_math()
powerpc/8xx: Fix do_mtspr_cpu6() build on older compilers
powerpc/rcpm: Fix build break when SMP=n
powerpc/book3e-64: Use hardcoded mttmr opcode
powerpc/fsl/dts: Add "jedec,spi-nor" flash compatible
powerpc/T104xRDB: add tdm riser card node to device tree
powerpc32: PAGE_EXEC required for inittext
powerpc/mpc85xx: Add pcsphy nodes to FManV3 device tree
powerpc/mpc85xx: Add MDIO bus muxing support to the board device tree(s)
powerpc/86xx: Introduce and use common dtsi
powerpc/86xx: Update device tree
powerpc/86xx: Move dts files to fsl directory
powerpc/86xx: Switch to kconfig fragments approach
powerpc/86xx: Update defconfigs
powerpc/86xx: Consolidate common platform code
powerpc32: Remove one insn in mulhdu
powerpc32: small optimisation in flush_icache_range()
powerpc: Simplify test in __dma_sync()
powerpc32: move xxxxx_dcache_range() functions inline
powerpc32: Remove clear_pages() and define clear_page() inline
...
Diffstat (limited to 'arch/powerpc/xmon/xmon.c')
-rw-r--r-- | arch/powerpc/xmon/xmon.c | 120 |
1 files changed, 119 insertions, 1 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 07a8508cb7fa..942796fa4767 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -47,6 +47,9 @@ #include <asm/debug.h> #include <asm/hw_breakpoint.h> +#include <asm/opal.h> +#include <asm/firmware.h> + #ifdef CONFIG_PPC64 #include <asm/hvcall.h> #include <asm/paca.h> @@ -119,6 +122,16 @@ static void dump(void); static void prdump(unsigned long, long); static int ppc_inst_dump(unsigned long, long, int); static void dump_log_buf(void); + +#ifdef CONFIG_PPC_POWERNV +static void dump_opal_msglog(void); +#else +static inline void dump_opal_msglog(void) +{ + printf("Machine is not running OPAL firmware.\n"); +} +#endif + static void backtrace(struct pt_regs *); static void excprint(struct pt_regs *); static void prregs(struct pt_regs *); @@ -150,6 +163,7 @@ static int cpu_cmd(void); static void csum(void); static void bootcmds(void); static void proccall(void); +static void show_tasks(void); void dump_segments(void); static void symbol_lookup(void); static void xmon_show_stack(unsigned long sp, unsigned long lr, @@ -202,6 +216,10 @@ Commands:\n\ df dump float values\n\ dd dump double values\n\ dl dump the kernel log buffer\n" +#ifdef CONFIG_PPC_POWERNV + "\ + do dump the OPAL message log\n" +#endif #ifdef CONFIG_PPC64 "\ dp[#] dump paca for current cpu, or cpu #\n\ @@ -221,6 +239,7 @@ Commands:\n\ mz zero a block of memory\n\ mi show information about memory allocation\n\ p call a procedure\n\ + P list processes/tasks\n\ r print registers\n\ s single step\n" #ifdef CONFIG_SPU_BASE @@ -233,7 +252,7 @@ Commands:\n\ " S print special registers\n\ t print backtrace\n\ x exit monitor and recover\n\ - X exit monitor and dont recover\n" + X exit monitor and don't recover\n" #if defined(CONFIG_PPC64) && !defined(CONFIG_PPC_BOOK3E) " u dump segment table or SLB\n" #elif defined(CONFIG_PPC_STD_MMU_32) @@ -950,6 +969,9 @@ cmds(struct pt_regs *excp) case 'p': proccall(); break; + case 'P': + show_tasks(); + break; #ifdef CONFIG_PPC_STD_MMU case 'u': dump_segments(); @@ -2253,6 +2275,8 @@ dump(void) last_cmd = "di\n"; } else if (c == 'l') { dump_log_buf(); + } else if (c == 'o') { + dump_opal_msglog(); } else if (c == 'r') { scanhex(&ndump); if (ndump == 0) @@ -2395,6 +2419,45 @@ dump_log_buf(void) catch_memory_errors = 0; } +#ifdef CONFIG_PPC_POWERNV +static void dump_opal_msglog(void) +{ + unsigned char buf[128]; + ssize_t res; + loff_t pos = 0; + + if (!firmware_has_feature(FW_FEATURE_OPAL)) { + printf("Machine is not running OPAL firmware.\n"); + return; + } + + if (setjmp(bus_error_jmp) != 0) { + printf("Error dumping OPAL msglog!\n"); + return; + } + + catch_memory_errors = 1; + sync(); + + xmon_start_pagination(); + while ((res = opal_msglog_copy(buf, pos, sizeof(buf) - 1))) { + if (res < 0) { + printf("Error dumping OPAL msglog! Error: %zd\n", res); + break; + } + buf[res] = '\0'; + printf("%s", buf); + pos += res; + } + xmon_end_pagination(); + + sync(); + /* wait a little while to see if we get a machine check */ + __delay(200); + catch_memory_errors = 0; +} +#endif + /* * Memory operations - move, set, print differences */ @@ -2508,6 +2571,61 @@ memzcan(void) printf("%.8x\n", a - mskip); } +static void show_task(struct task_struct *tsk) +{ + char state; + + /* + * Cloned from kdb_task_state_char(), which is not entirely + * appropriate for calling from xmon. This could be moved + * to a common, generic, routine used by both. + */ + state = (tsk->state == 0) ? 'R' : + (tsk->state < 0) ? 'U' : + (tsk->state & TASK_UNINTERRUPTIBLE) ? 'D' : + (tsk->state & TASK_STOPPED) ? 'T' : + (tsk->state & TASK_TRACED) ? 'C' : + (tsk->exit_state & EXIT_ZOMBIE) ? 'Z' : + (tsk->exit_state & EXIT_DEAD) ? 'E' : + (tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?'; + + printf("%p %016lx %6d %6d %c %2d %s\n", tsk, + tsk->thread.ksp, + tsk->pid, tsk->parent->pid, + state, task_thread_info(tsk)->cpu, + tsk->comm); +} + +static void show_tasks(void) +{ + unsigned long tskv; + struct task_struct *tsk = NULL; + + printf(" task_struct ->thread.ksp PID PPID S P CMD\n"); + + if (scanhex(&tskv)) + tsk = (struct task_struct *)tskv; + + if (setjmp(bus_error_jmp) != 0) { + catch_memory_errors = 0; + printf("*** Error dumping task %p\n", tsk); + return; + } + + catch_memory_errors = 1; + sync(); + + if (tsk) + show_task(tsk); + else + for_each_process(tsk) + show_task(tsk); + + sync(); + __delay(200); + catch_memory_errors = 0; +} + static void proccall(void) { unsigned long args[8]; |