Commit fde93a0f authored by Andrew Donnellan's avatar Andrew Donnellan Committed by Michael Ellerman
Browse files

powerpc/xmon: add command to dump OPAL msglog 



Add the 'do' command to dump the OPAL msglog in xmon.

Signed-off-by: default avatarAndrew Donnellan <andrew.donnellan@au1.ibm.com>
[mpe: Reduce the amount of ifdefery required]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 9b4fffa1

arch/powerpc/xmon/xmon.c

+58 −0
Original line number Diff line number Diff line
@@ -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 *);
@@ -202,6 +215,10 @@ 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\
@@ -2253,6 +2270,8 @@ 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 +2414,45 @@ 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

 */