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Diffstat (limited to 'arch/powerpc/xmon/xmon.c')
-rw-r--r--arch/powerpc/xmon/xmon.c241
1 files changed, 180 insertions, 61 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 9b49c65ee7a..d199bfa2f1f 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -43,6 +43,7 @@
#include <asm/setjmp.h>
#include <asm/reg.h>
#include <asm/debug.h>
+#include <asm/hw_breakpoint.h>
#ifdef CONFIG_PPC64
#include <asm/hvcall.h>
@@ -52,14 +53,13 @@
#include "nonstdio.h"
#include "dis-asm.h"
-#define scanhex xmon_scanhex
-#define skipbl xmon_skipbl
-
#ifdef CONFIG_SMP
static cpumask_t cpus_in_xmon = CPU_MASK_NONE;
static unsigned long xmon_taken = 1;
static int xmon_owner;
static int xmon_gate;
+#else
+#define xmon_owner 0
#endif /* CONFIG_SMP */
static unsigned long in_xmon __read_mostly = 0;
@@ -167,15 +167,15 @@ extern void xmon_leave(void);
#ifdef CONFIG_PPC64
#define REG "%.16lx"
-#define REGS_PER_LINE 4
-#define LAST_VOLATILE 13
#else
#define REG "%.8lx"
-#define REGS_PER_LINE 8
-#define LAST_VOLATILE 12
#endif
+#ifdef __LITTLE_ENDIAN__
+#define GETWORD(v) (((v)[3] << 24) + ((v)[2] << 16) + ((v)[1] << 8) + (v)[0])
+#else
#define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3])
+#endif
#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
|| ('a' <= (c) && (c) <= 'f') \
@@ -202,7 +202,13 @@ Commands:\n\
di dump instructions\n\
df dump float values\n\
dd dump double values\n\
- dl dump the kernel log buffer\n\
+ dl dump the kernel log buffer\n"
+#ifdef CONFIG_PPC64
+ "\
+ dp[#] dump paca for current cpu, or cpu #\n\
+ dpa dump paca for all possible cpus\n"
+#endif
+ "\
dr dump stream of raw bytes\n\
e print exception information\n\
f flush cache\n\
@@ -307,16 +313,23 @@ static void get_output_lock(void)
if (xmon_speaker == me)
return;
+
for (;;) {
- if (xmon_speaker == 0) {
- last_speaker = cmpxchg(&xmon_speaker, 0, me);
- if (last_speaker == 0)
- return;
- }
- timeout = 10000000;
+ last_speaker = cmpxchg(&xmon_speaker, 0, me);
+ if (last_speaker == 0)
+ return;
+
+ /*
+ * Wait a full second for the lock, we might be on a slow
+ * console, but check every 100us.
+ */
+ timeout = 10000;
while (xmon_speaker == last_speaker) {
- if (--timeout > 0)
+ if (--timeout > 0) {
+ udelay(100);
continue;
+ }
+
/* hostile takeover */
prev = cmpxchg(&xmon_speaker, last_speaker, me);
if (prev == last_speaker)
@@ -395,7 +408,6 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
}
xmon_fault_jmp[cpu] = recurse_jmp;
- cpumask_set_cpu(cpu, &cpus_in_xmon);
bp = NULL;
if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) == (MSR_IR|MSR_64BIT))
@@ -407,7 +419,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
get_output_lock();
excprint(regs);
if (bp) {
- printf("cpu 0x%x stopped at breakpoint 0x%x (",
+ printf("cpu 0x%x stopped at breakpoint 0x%lx (",
cpu, BP_NUM(bp));
xmon_print_symbol(regs->nip, " ", ")\n");
}
@@ -417,6 +429,8 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
release_output_lock();
}
+ cpumask_set_cpu(cpu, &cpus_in_xmon);
+
waiting:
secondary = 1;
while (secondary && !xmon_gate) {
@@ -499,7 +513,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
excprint(regs);
bp = at_breakpoint(regs->nip);
if (bp) {
- printf("Stopped at breakpoint %x (", BP_NUM(bp));
+ printf("Stopped at breakpoint %lx (", BP_NUM(bp));
xmon_print_symbol(regs->nip, " ", ")\n");
}
if (unrecoverable_excp(regs))
@@ -606,7 +620,7 @@ static int xmon_sstep(struct pt_regs *regs)
return 1;
}
-static int xmon_dabr_match(struct pt_regs *regs)
+static int xmon_break_match(struct pt_regs *regs)
{
if ((regs->msr & (MSR_IR|MSR_PR|MSR_64BIT)) != (MSR_IR|MSR_64BIT))
return 0;
@@ -739,8 +753,14 @@ static void insert_bpts(void)
static void insert_cpu_bpts(void)
{
- if (dabr.enabled)
- set_dabr(dabr.address | (dabr.enabled & 7));
+ struct arch_hw_breakpoint brk;
+
+ if (dabr.enabled) {
+ brk.address = dabr.address;
+ brk.type = (dabr.enabled & HW_BRK_TYPE_DABR) | HW_BRK_TYPE_PRIV_ALL;
+ brk.len = 8;
+ __set_breakpoint(&brk);
+ }
if (iabr && cpu_has_feature(CPU_FTR_IABR))
mtspr(SPRN_IABR, iabr->address
| (iabr->enabled & (BP_IABR|BP_IABR_TE)));
@@ -768,7 +788,7 @@ static void remove_bpts(void)
static void remove_cpu_bpts(void)
{
- set_dabr(0);
+ hw_breakpoint_disable();
if (cpu_has_feature(CPU_FTR_IABR))
mtspr(SPRN_IABR, 0);
}
@@ -964,27 +984,27 @@ static void bootcmds(void)
static int cpu_cmd(void)
{
#ifdef CONFIG_SMP
- unsigned long cpu;
+ unsigned long cpu, first_cpu, last_cpu;
int timeout;
- int count;
if (!scanhex(&cpu)) {
/* print cpus waiting or in xmon */
printf("cpus stopped:");
- count = 0;
+ last_cpu = first_cpu = NR_CPUS;
for_each_possible_cpu(cpu) {
if (cpumask_test_cpu(cpu, &cpus_in_xmon)) {
- if (count == 0)
- printf(" %x", cpu);
- ++count;
- } else {
- if (count > 1)
- printf("-%x", cpu - 1);
- count = 0;
+ if (cpu == last_cpu + 1) {
+ last_cpu = cpu;
+ } else {
+ if (last_cpu != first_cpu)
+ printf("-0x%lx", last_cpu);
+ last_cpu = first_cpu = cpu;
+ printf(" 0x%lx", cpu);
+ }
}
}
- if (count > 1)
- printf("-%x", NR_CPUS - 1);
+ if (last_cpu != first_cpu)
+ printf("-0x%lx", last_cpu);
printf("\n");
return 0;
}
@@ -1004,7 +1024,7 @@ static int cpu_cmd(void)
/* take control back */
mb();
xmon_owner = smp_processor_id();
- printf("cpu %u didn't take control\n", cpu);
+ printf("cpu 0x%x didn't take control\n", cpu);
return 0;
}
barrier();
@@ -1066,7 +1086,7 @@ csum(void)
fcs = 0xffff;
for (i = 0; i < ncsum; ++i) {
if (mread(adrs+i, &v, 1) == 0) {
- printf("csum stopped at %x\n", adrs+i);
+ printf("csum stopped at "REG"\n", adrs+i);
break;
}
fcs = FCS(fcs, v);
@@ -1137,7 +1157,7 @@ bpt_cmds(void)
printf(badaddr);
break;
}
- dabr.address &= ~7;
+ dabr.address &= ~HW_BRK_TYPE_DABR;
dabr.enabled = mode | BP_DABR;
}
break;
@@ -1182,12 +1202,12 @@ bpt_cmds(void)
/* assume a breakpoint address */
bp = at_breakpoint(a);
if (bp == NULL) {
- printf("No breakpoint at %x\n", a);
+ printf("No breakpoint at %lx\n", a);
break;
}
}
- printf("Cleared breakpoint %x (", BP_NUM(bp));
+ printf("Cleared breakpoint %lx (", BP_NUM(bp));
xmon_print_symbol(bp->address, " ", ")\n");
bp->enabled = 0;
break;
@@ -1248,11 +1268,18 @@ const char *getvecname(unsigned long vec)
case 0x700: ret = "(Program Check)"; break;
case 0x800: ret = "(FPU Unavailable)"; break;
case 0x900: ret = "(Decrementer)"; break;
+ case 0x980: ret = "(Hypervisor Decrementer)"; break;
+ case 0xa00: ret = "(Doorbell)"; break;
case 0xc00: ret = "(System Call)"; break;
case 0xd00: ret = "(Single Step)"; break;
+ case 0xe40: ret = "(Emulation Assist)"; break;
+ case 0xe60: ret = "(HMI)"; break;
+ case 0xe80: ret = "(Hypervisor Doorbell)"; break;
case 0xf00: ret = "(Performance Monitor)"; break;
case 0xf20: ret = "(Altivec Unavailable)"; break;
case 0x1300: ret = "(Instruction Breakpoint)"; break;
+ case 0x1500: ret = "(Denormalisation)"; break;
+ case 0x1700: ret = "(Altivec Assist)"; break;
default: ret = "";
}
return ret;
@@ -1280,27 +1307,19 @@ static void get_function_bounds(unsigned long pc, unsigned long *startp,
catch_memory_errors = 0;
}
-static int xmon_depth_to_print = 64;
-
#define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long))
#define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long))
-#ifdef __powerpc64__
-#define REGS_OFFSET 0x70
-#else
-#define REGS_OFFSET 16
-#endif
-
static void xmon_show_stack(unsigned long sp, unsigned long lr,
unsigned long pc)
{
+ int max_to_print = 64;
unsigned long ip;
unsigned long newsp;
unsigned long marker;
- int count = 0;
struct pt_regs regs;
- do {
+ while (max_to_print--) {
if (sp < PAGE_OFFSET) {
if (sp != 0)
printf("SP (%lx) is in userspace\n", sp);
@@ -1354,10 +1373,10 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr,
an exception frame. */
if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
&& marker == STACK_FRAME_REGS_MARKER) {
- if (mread(sp + REGS_OFFSET, &regs, sizeof(regs))
+ if (mread(sp + STACK_FRAME_OVERHEAD, &regs, sizeof(regs))
!= sizeof(regs)) {
printf("Couldn't read registers at %lx\n",
- sp + REGS_OFFSET);
+ sp + STACK_FRAME_OVERHEAD);
break;
}
printf("--- Exception: %lx %s at ", regs.trap,
@@ -1371,7 +1390,7 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr,
break;
sp = newsp;
- } while (count++ < xmon_depth_to_print);
+ }
}
static void backtrace(struct pt_regs *excp)
@@ -1430,7 +1449,7 @@ static void excprint(struct pt_regs *fp)
printf(" sp: %lx\n", fp->gpr[1]);
printf(" msr: %lx\n", fp->msr);
- if (trap == 0x300 || trap == 0x380 || trap == 0x600) {
+ if (trap == 0x300 || trap == 0x380 || trap == 0x600 || trap == 0x200) {
printf(" dar: %lx\n", fp->dar);
if (trap != 0x380)
printf(" dsisr: %lx\n", fp->dsisr);
@@ -1727,7 +1746,7 @@ mwrite(unsigned long adrs, void *buf, int size)
__delay(200);
n = size;
} else {
- printf("*** Error writing address %x\n", adrs + n);
+ printf("*** Error writing address "REG"\n", adrs + n);
}
catch_memory_errors = 0;
return n;
@@ -2009,6 +2028,99 @@ static void xmon_rawdump (unsigned long adrs, long ndump)
printf("\n");
}
+#ifdef CONFIG_PPC64
+static void dump_one_paca(int cpu)
+{
+ struct paca_struct *p;
+
+ if (setjmp(bus_error_jmp) != 0) {
+ printf("*** Error dumping paca for cpu 0x%x!\n", cpu);
+ return;
+ }
+
+ catch_memory_errors = 1;
+ sync();
+
+ p = &paca[cpu];
+
+ printf("paca for cpu 0x%x @ %p:\n", cpu, p);
+
+ printf(" %-*s = %s\n", 16, "possible", cpu_possible(cpu) ? "yes" : "no");
+ printf(" %-*s = %s\n", 16, "present", cpu_present(cpu) ? "yes" : "no");
+ printf(" %-*s = %s\n", 16, "online", cpu_online(cpu) ? "yes" : "no");
+
+#define DUMP(paca, name, format) \
+ printf(" %-*s = %#-*"format"\t(0x%lx)\n", 16, #name, 18, paca->name, \
+ offsetof(struct paca_struct, name));
+
+ DUMP(p, lock_token, "x");
+ DUMP(p, paca_index, "x");
+ DUMP(p, kernel_toc, "lx");
+ DUMP(p, kernelbase, "lx");
+ DUMP(p, kernel_msr, "lx");
+#ifdef CONFIG_PPC_STD_MMU_64
+ DUMP(p, stab_real, "lx");
+ DUMP(p, stab_addr, "lx");
+#endif
+ DUMP(p, emergency_sp, "p");
+#ifdef CONFIG_PPC_BOOK3S_64
+ DUMP(p, mc_emergency_sp, "p");
+ DUMP(p, in_mce, "x");
+#endif
+ DUMP(p, data_offset, "lx");
+ DUMP(p, hw_cpu_id, "x");
+ DUMP(p, cpu_start, "x");
+ DUMP(p, kexec_state, "x");
+ DUMP(p, __current, "p");
+ DUMP(p, kstack, "lx");
+ DUMP(p, stab_rr, "lx");
+ DUMP(p, saved_r1, "lx");
+ DUMP(p, trap_save, "x");
+ DUMP(p, soft_enabled, "x");
+ DUMP(p, irq_happened, "x");
+ DUMP(p, io_sync, "x");
+ DUMP(p, irq_work_pending, "x");
+ DUMP(p, nap_state_lost, "x");
+
+#undef DUMP
+
+ catch_memory_errors = 0;
+ sync();
+}
+
+static void dump_all_pacas(void)
+{
+ int cpu;
+
+ if (num_possible_cpus() == 0) {
+ printf("No possible cpus, use 'dp #' to dump individual cpus\n");
+ return;
+ }
+
+ for_each_possible_cpu(cpu)
+ dump_one_paca(cpu);
+}
+
+static void dump_pacas(void)
+{
+ unsigned long num;
+ int c;
+
+ c = inchar();
+ if (c == 'a') {
+ dump_all_pacas();
+ return;
+ }
+
+ termch = c; /* Put c back, it wasn't 'a' */
+
+ if (scanhex(&num))
+ dump_one_paca(num);
+ else
+ dump_one_paca(xmon_owner);
+}
+#endif
+
#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
|| ('a' <= (c) && (c) <= 'f') \
|| ('A' <= (c) && (c) <= 'F'))
@@ -2018,6 +2130,14 @@ dump(void)
int c;
c = inchar();
+
+#ifdef CONFIG_PPC64
+ if (c == 'p') {
+ dump_pacas();
+ return;
+ }
+#endif
+
if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n')
termch = c;
scanhex((void *)&adrs);
@@ -2315,7 +2435,7 @@ static void proccall(void)
ret = func(args[0], args[1], args[2], args[3],
args[4], args[5], args[6], args[7]);
sync();
- printf("return value is %x\n", ret);
+ printf("return value is 0x%lx\n", ret);
} else {
printf("*** %x exception occurred\n", fault_except);
}
@@ -2580,7 +2700,7 @@ static void dump_slb(void)
unsigned long esid,vsid,valid;
unsigned long llp;
- printf("SLB contents of cpu %x\n", smp_processor_id());
+ printf("SLB contents of cpu 0x%x\n", smp_processor_id());
for (i = 0; i < mmu_slb_size; i++) {
asm volatile("slbmfee %0,%1" : "=r" (esid) : "r" (i));
@@ -2612,7 +2732,7 @@ static void dump_stab(void)
int i;
unsigned long *tmp = (unsigned long *)local_paca->stab_addr;
- printf("Segment table contents of cpu %x\n", smp_processor_id());
+ printf("Segment table contents of cpu 0x%x\n", smp_processor_id());
for (i = 0; i < PAGE_SIZE/16; i++) {
unsigned long a, b;
@@ -2827,7 +2947,7 @@ static void xmon_init(int enable)
__debugger_bpt = xmon_bpt;
__debugger_sstep = xmon_sstep;
__debugger_iabr_match = xmon_iabr_match;
- __debugger_dabr_match = xmon_dabr_match;
+ __debugger_break_match = xmon_break_match;
__debugger_fault_handler = xmon_fault_handler;
} else {
__debugger = NULL;
@@ -2835,10 +2955,9 @@ static void xmon_init(int enable)
__debugger_bpt = NULL;
__debugger_sstep = NULL;
__debugger_iabr_match = NULL;
- __debugger_dabr_match = NULL;
+ __debugger_break_match = NULL;
__debugger_fault_handler = NULL;
}
- xmon_map_scc();
}
#ifdef CONFIG_MAGIC_SYSRQ
@@ -2851,7 +2970,7 @@ static void sysrq_handle_xmon(int key)
static struct sysrq_key_op sysrq_xmon_op = {
.handler = sysrq_handle_xmon,
- .help_msg = "Xmon",
+ .help_msg = "xmon(x)",
.action_msg = "Entering xmon",
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 17:23:05 +0000