Commit daf8f403 authored by Josh Boyer's avatar Josh Boyer Committed by Benjamin Herrenschmidt

powerpc/4xx: Fix erroneous xmon warning on PowerPC 4xx

The xmon code relies on MSR_RI being non-zero to indicate that an exception
is recoverable.  If it is not, it prints a warning message.  However, the
PowerPC 4xx cores do not have an MSR_RI bit and this warning is produced for
every xmon event.

This introduces an unrecoverable_excp function to determine if an exception
is recoverable or not.  This gets rid of the erroneous warnings on 4xx.
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent f32af63e
......@@ -335,6 +335,16 @@ int cpus_are_in_xmon(void)
}
#endif
static inline int unrecoverable_excp(struct pt_regs *regs)
{
#ifdef CONFIG_4xx
/* We have no MSR_RI bit on 4xx, so we simply return false */
return 0;
#else
return ((regs->msr & MSR_RI) == 0);
#endif
}
static int xmon_core(struct pt_regs *regs, int fromipi)
{
int cmd = 0;
......@@ -388,7 +398,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
bp = NULL;
if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF))
bp = at_breakpoint(regs->nip);
if (bp || (regs->msr & MSR_RI) == 0)
if (bp || unrecoverable_excp(regs))
fromipi = 0;
if (!fromipi) {
......@@ -399,7 +409,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
cpu, BP_NUM(bp));
xmon_print_symbol(regs->nip, " ", ")\n");
}
if ((regs->msr & MSR_RI) == 0)
if (unrecoverable_excp(regs))
printf("WARNING: exception is not recoverable, "
"can't continue\n");
release_output_lock();
......@@ -490,7 +500,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi)
printf("Stopped at breakpoint %x (", BP_NUM(bp));
xmon_print_symbol(regs->nip, " ", ")\n");
}
if ((regs->msr & MSR_RI) == 0)
if (unrecoverable_excp(regs))
printf("WARNING: exception is not recoverable, "
"can't continue\n");
remove_bpts();
......
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