diff options
| author | Cédric Le Goater <clg@kaod.org> | 2020-03-06 16:01:43 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-03-26 14:20:38 +0100 |
| commit | 930914b7d528fc6b0249bffc00564100bcf6ef75 (patch) | |
| tree | 3834a9397f3ed2e1d2ba1e91b84234fc49901fc8 /arch/powerpc/sysdev/xive/spapr.c | |
| parent | powerpc/xmon: Add source flags to output of XIVE interrupts (diff) | |
| download | linux-930914b7d528fc6b0249bffc00564100bcf6ef75.tar.xz linux-930914b7d528fc6b0249bffc00564100bcf6ef75.zip | |
powerpc/xive: Add a debugfs file to dump internal XIVE state
As does XMON, the debugfs file /sys/kernel/debug/powerpc/xive exposes
the XIVE internal state of the machine CPUs and interrupts. Available
on the PowerNV and sPAPR platforms.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
[mpe: Make the debugfs file 0400]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200306150143.5551-5-clg@kaod.org
Diffstat (limited to 'arch/powerpc/sysdev/xive/spapr.c')
| -rw-r--r-- | arch/powerpc/sysdev/xive/spapr.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index 3f15615712b5..7ab5c6780997 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -18,6 +18,7 @@ #include <linux/delay.h> #include <linux/libfdt.h> +#include <asm/machdep.h> #include <asm/prom.h> #include <asm/io.h> #include <asm/smp.h> @@ -645,6 +646,21 @@ static void xive_spapr_sync_source(u32 hw_irq) plpar_int_sync(0, hw_irq); } +static int xive_spapr_debug_show(struct seq_file *m, void *private) +{ + struct xive_irq_bitmap *xibm; + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + + list_for_each_entry(xibm, &xive_irq_bitmaps, list) { + memset(buf, 0, PAGE_SIZE); + bitmap_print_to_pagebuf(true, buf, xibm->bitmap, xibm->count); + seq_printf(m, "bitmap #%d: %s", xibm->count, buf); + } + kfree(buf); + + return 0; +} + static const struct xive_ops xive_spapr_ops = { .populate_irq_data = xive_spapr_populate_irq_data, .configure_irq = xive_spapr_configure_irq, @@ -662,6 +678,7 @@ static const struct xive_ops xive_spapr_ops = { #ifdef CONFIG_SMP .get_ipi = xive_spapr_get_ipi, .put_ipi = xive_spapr_put_ipi, + .debug_show = xive_spapr_debug_show, #endif /* CONFIG_SMP */ .name = "spapr", }; @@ -839,3 +856,5 @@ bool __init xive_spapr_init(void) pr_info("Using %dkB queues\n", 1 << (xive_queue_shift - 10)); return true; } + +machine_arch_initcall(pseries, xive_core_debug_init); |