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Diffstat (limited to 'arch/powerpc/xmon/xmon.c')
-rw-r--r--arch/powerpc/xmon/xmon.c169
1 files changed, 162 insertions, 7 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 33351c6704b1..1b2d8cb49abb 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -28,6 +28,7 @@
#include <linux/bug.h>
#include <linux/nmi.h>
#include <linux/ctype.h>
+#include <linux/highmem.h>
#include <asm/debugfs.h>
#include <asm/ptrace.h>
@@ -127,6 +128,7 @@ static void byterev(unsigned char *, int);
static void memex(void);
static int bsesc(void);
static void dump(void);
+static void show_pte(unsigned long);
static void prdump(unsigned long, long);
static int ppc_inst_dump(unsigned long, long, int);
static void dump_log_buf(void);
@@ -234,6 +236,7 @@ Commands:\n\
#endif
"\
dr dump stream of raw bytes\n\
+ dv dump virtual address translation \n\
dt dump the tracing buffers (uses printk)\n\
dtc dump the tracing buffers for current CPU (uses printk)\n\
"
@@ -278,6 +281,7 @@ Commands:\n\
#elif defined(CONFIG_44x) || defined(CONFIG_PPC_BOOK3E)
" u dump TLB\n"
#endif
+" U show uptime information\n"
" ? help\n"
" # n limit output to n lines per page (for dp, dpa, dl)\n"
" zr reboot\n\
@@ -530,14 +534,19 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
waiting:
secondary = 1;
+ spin_begin();
while (secondary && !xmon_gate) {
if (in_xmon == 0) {
- if (fromipi)
+ if (fromipi) {
+ spin_end();
goto leave;
+ }
secondary = test_and_set_bit(0, &in_xmon);
}
- barrier();
+ spin_cpu_relax();
+ touch_nmi_watchdog();
}
+ spin_end();
if (!secondary && !xmon_gate) {
/* we are the first cpu to come in */
@@ -568,21 +577,25 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
mb();
xmon_gate = 1;
barrier();
+ touch_nmi_watchdog();
}
cmdloop:
while (in_xmon) {
if (secondary) {
+ spin_begin();
if (cpu == xmon_owner) {
if (!test_and_set_bit(0, &xmon_taken)) {
secondary = 0;
+ spin_end();
continue;
}
/* missed it */
while (cpu == xmon_owner)
- barrier();
+ spin_cpu_relax();
}
- barrier();
+ spin_cpu_relax();
+ touch_nmi_watchdog();
} else {
cmd = cmds(regs);
if (cmd != 0) {
@@ -896,6 +909,26 @@ static void remove_cpu_bpts(void)
write_ciabr(0);
}
+/* Based on uptime_proc_show(). */
+static void
+show_uptime(void)
+{
+ struct timespec uptime;
+
+ if (setjmp(bus_error_jmp) == 0) {
+ catch_memory_errors = 1;
+ sync();
+
+ get_monotonic_boottime(&uptime);
+ printf("Uptime: %lu.%.2lu seconds\n", (unsigned long)uptime.tv_sec,
+ ((unsigned long)uptime.tv_nsec / (NSEC_PER_SEC/100)));
+
+ sync();
+ __delay(200); \
+ }
+ catch_memory_errors = 0;
+}
+
static void set_lpp_cmd(void)
{
unsigned long lpp;
@@ -1031,6 +1064,9 @@ cmds(struct pt_regs *excp)
dump_tlb_book3e();
break;
#endif
+ case 'U':
+ show_uptime();
+ break;
default:
printf("Unrecognized command: ");
do {
@@ -2279,7 +2315,7 @@ static void dump_tracing(void)
static void dump_one_paca(int cpu)
{
struct paca_struct *p;
-#ifdef CONFIG_PPC_STD_MMU_64
+#ifdef CONFIG_PPC_BOOK3S_64
int i = 0;
#endif
@@ -2320,7 +2356,7 @@ static void dump_one_paca(int cpu)
DUMP(p, hw_cpu_id, "x");
DUMP(p, cpu_start, "x");
DUMP(p, kexec_state, "x");
-#ifdef CONFIG_PPC_STD_MMU_64
+#ifdef CONFIG_PPC_BOOK3S_64
for (i = 0; i < SLB_NUM_BOLTED; i++) {
u64 esid, vsid;
@@ -2351,6 +2387,7 @@ static void dump_one_paca(int cpu)
#endif
DUMP(p, __current, "p");
DUMP(p, kstack, "lx");
+ printf(" kstack_base = 0x%016lx\n", p->kstack & ~(THREAD_SIZE - 1));
DUMP(p, stab_rr, "lx");
DUMP(p, saved_r1, "lx");
DUMP(p, trap_save, "x");
@@ -2475,6 +2512,11 @@ static void dump_xives(void)
unsigned long num;
int c;
+ if (!xive_enabled()) {
+ printf("Xive disabled on this system\n");
+ return;
+ }
+
c = inchar();
if (c == 'a') {
dump_all_xives();
@@ -2574,6 +2616,9 @@ dump(void)
dump_log_buf();
} else if (c == 'o') {
dump_opal_msglog();
+ } else if (c == 'v') {
+ /* dump virtual to physical translation */
+ show_pte(adrs);
} else if (c == 'r') {
scanhex(&ndump);
if (ndump == 0)
@@ -2907,6 +2952,116 @@ static void show_task(struct task_struct *tsk)
tsk->comm);
}
+#ifdef CONFIG_PPC_BOOK3S_64
+void format_pte(void *ptep, unsigned long pte)
+{
+ printf("ptep @ 0x%016lx = 0x%016lx\n", (unsigned long)ptep, pte);
+ printf("Maps physical address = 0x%016lx\n", pte & PTE_RPN_MASK);
+
+ printf("Flags = %s%s%s%s%s\n",
+ (pte & _PAGE_ACCESSED) ? "Accessed " : "",
+ (pte & _PAGE_DIRTY) ? "Dirty " : "",
+ (pte & _PAGE_READ) ? "Read " : "",
+ (pte & _PAGE_WRITE) ? "Write " : "",
+ (pte & _PAGE_EXEC) ? "Exec " : "");
+}
+
+static void show_pte(unsigned long addr)
+{
+ unsigned long tskv = 0;
+ struct task_struct *tsk = NULL;
+ struct mm_struct *mm;
+ pgd_t *pgdp, *pgdir;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep;
+
+ if (!scanhex(&tskv))
+ mm = &init_mm;
+ else
+ tsk = (struct task_struct *)tskv;
+
+ if (tsk == NULL)
+ mm = &init_mm;
+ else
+ mm = tsk->active_mm;
+
+ if (setjmp(bus_error_jmp) != 0) {
+ catch_memory_errors = 0;
+ printf("*** Error dumping pte for task %p\n", tsk);
+ return;
+ }
+
+ catch_memory_errors = 1;
+ sync();
+
+ if (mm == &init_mm) {
+ pgdp = pgd_offset_k(addr);
+ pgdir = pgd_offset_k(0);
+ } else {
+ pgdp = pgd_offset(mm, addr);
+ pgdir = pgd_offset(mm, 0);
+ }
+
+ if (pgd_none(*pgdp)) {
+ printf("no linux page table for address\n");
+ return;
+ }
+
+ printf("pgd @ 0x%016lx\n", pgdir);
+
+ if (pgd_huge(*pgdp)) {
+ format_pte(pgdp, pgd_val(*pgdp));
+ return;
+ }
+ printf("pgdp @ 0x%016lx = 0x%016lx\n", pgdp, pgd_val(*pgdp));
+
+ pudp = pud_offset(pgdp, addr);
+
+ if (pud_none(*pudp)) {
+ printf("No valid PUD\n");
+ return;
+ }
+
+ if (pud_huge(*pudp)) {
+ format_pte(pudp, pud_val(*pudp));
+ return;
+ }
+
+ printf("pudp @ 0x%016lx = 0x%016lx\n", pudp, pud_val(*pudp));
+
+ pmdp = pmd_offset(pudp, addr);
+
+ if (pmd_none(*pmdp)) {
+ printf("No valid PMD\n");
+ return;
+ }
+
+ if (pmd_huge(*pmdp)) {
+ format_pte(pmdp, pmd_val(*pmdp));
+ return;
+ }
+ printf("pmdp @ 0x%016lx = 0x%016lx\n", pmdp, pmd_val(*pmdp));
+
+ ptep = pte_offset_map(pmdp, addr);
+ if (pte_none(*ptep)) {
+ printf("no valid PTE\n");
+ return;
+ }
+
+ format_pte(ptep, pte_val(*ptep));
+
+ sync();
+ __delay(200);
+ catch_memory_errors = 0;
+}
+#else
+static void show_pte(unsigned long addr)
+{
+ printf("show_pte not yet implemented\n");
+}
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
static void show_tasks(void)
{
unsigned long tskv;
@@ -3224,7 +3379,7 @@ static void xmon_print_symbol(unsigned long address, const char *mid,
printf("%s", after);
}
-#ifdef CONFIG_PPC_STD_MMU_64
+#ifdef CONFIG_PPC_BOOK3S_64
void dump_segments(void)
{
int i;
generated by cgit (git 2.34.1) at 2024-05-03 10:37:30 +0000