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powerpc/xmon: Improve output of XIVE interrupts 

When looping on the list of interrupts, add the current value of the
PQ bits with a load on the ESB page. This has the side effect of
faulting the ESB page of all interrupts.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190910081850.26038-2-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2019-09-10 10:18:49 +02:00 committed by Michael Ellerman
parent ec5b705c48
commit 5896163f7f
3 changed files with 31 additions and 16 deletions
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3
arch/powerpc/include/asm/xive.h
View File

@ -99,8 +99,7 @@ extern void xive_flush_interrupt(void);
/* xmon hook */
extern void xmon_xive_do_dump(int cpu);
extern int xmon_xive_get_irq_config(u32 irq, u32 *target, u8 *prio,
u32 *sw_irq);
extern int xmon_xive_get_irq_config(u32 hw_irq, struct irq_data *d);
/* APIs used by KVM */
extern u32 xive_native_default_eq_shift(void);

29
arch/powerpc/sysdev/xive/common.c
View File

@ -258,10 +258,33 @@ notrace void xmon_xive_do_dump(int cpu)
#endif
}
int xmon_xive_get_irq_config(u32 irq, u32 *target, u8 *prio,
u32 *sw_irq)
int xmon_xive_get_irq_config(u32 hw_irq, struct irq_data *d)
{
return xive_ops->get_irq_config(irq, target, prio, sw_irq);
int rc;
u32 target;
u8 prio;
u32 lirq;
rc = xive_ops->get_irq_config(hw_irq, &target, &prio, &lirq);
if (rc) {
xmon_printf("IRQ 0x%08x : no config rc=%d\n", hw_irq, rc);
return rc;
}
xmon_printf("IRQ 0x%08x : target=0x%x prio=%02x lirq=0x%x ",
hw_irq, target, prio, lirq);
if (d) {
struct xive_irq_data *xd = irq_data_get_irq_handler_data(d);
u64 val = xive_esb_read(xd, XIVE_ESB_GET);
xmon_printf("PQ=%c%c",
val & XIVE_ESB_VAL_P ? 'P' : '-',
val & XIVE_ESB_VAL_Q ? 'Q' : '-');
}
xmon_printf("\n");
return 0;
}
#endif /* CONFIG_XMON */

15
arch/powerpc/xmon/xmon.c
View File

@ -2572,16 +2572,9 @@ static void dump_all_xives(void)
dump_one_xive(cpu);
}
static void dump_one_xive_irq(u32 num)
static void dump_one_xive_irq(u32 num, struct irq_data *d)
{
int rc;
u32 target;
u8 prio;
u32 lirq;
rc = xmon_xive_get_irq_config(num, &target, &prio, &lirq);
xmon_printf("IRQ 0x%08x : target=0x%x prio=%d lirq=0x%x (rc=%d)\n",
num, target, prio, lirq, rc);
xmon_xive_get_irq_config(num, d);
}
static void dump_all_xive_irq(void)
@ -2599,7 +2592,7 @@ static void dump_all_xive_irq(void)
hwirq = (unsigned int)irqd_to_hwirq(d);
/* IPIs are special (HW number 0) */
if (hwirq)
dump_one_xive_irq(hwirq);
dump_one_xive_irq(hwirq, d);
}
}
@ -2619,7 +2612,7 @@ static void dump_xives(void)
return;
} else if (c == 'i') {
if (scanhex(&num))
dump_one_xive_irq(num);
dump_one_xive_irq(num, NULL);
else
dump_all_xive_irq();
return;