diff options
| author |   Cédric Le Goater <clg@kaod.org> | 2021-11-05 11:26:32 +0100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-11-25 11:25:30 +1100 |
| commit | 08f3f610214f395561bbda03344e641579f6e917 (patch) | |
| tree | 83f318f76034f28fcf531b8a8b5955bcf8830b26 /arch/powerpc/sysdev | |
| parent | powerpc/xive: Rename the 'cpus' debugfs file to 'ipis' (diff) | |
| download | linux-dev-08f3f610214f395561bbda03344e641579f6e917.tar.xz linux-dev-08f3f610214f395561bbda03344e641579f6e917.zip | |
powerpc/xive: Add a debugfs file to dump EQs
The XIVE driver under Linux uses a single interrupt priority and only
one event queue is configured per CPU. Expose the contents under
a 'xive/eqs/cpuX' debugfs file.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211105102636.1016378-8-clg@kaod.org
Diffstat (limited to 'arch/powerpc/sysdev')
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 3ef3cc413b31..ff6a2d1ed41d 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -1774,9 +1774,40 @@ static int xive_ipi_debug_show(struct seq_file *m, void *private) } DEFINE_SHOW_ATTRIBUTE(xive_ipi_debug); +static void xive_eq_debug_show_one(struct seq_file *m, struct xive_q *q, u8 prio) +{ + int i; + + seq_printf(m, "EQ%d idx=%d T=%d\n", prio, q->idx, q->toggle); + if (q->qpage) { + for (i = 0; i < q->msk + 1; i++) { + if (!(i % 8)) + seq_printf(m, "%05d ", i); + seq_printf(m, "%08x%s", be32_to_cpup(q->qpage + i), + (i + 1) % 8 ? " " : "\n"); + } + } + seq_puts(m, "\n"); +} + +static int xive_eq_debug_show(struct seq_file *m, void *private) +{ + int cpu = (long)m->private; + struct xive_cpu *xc = per_cpu(xive_cpu, cpu); + + if (xc) + xive_eq_debug_show_one(m, &xc->queue[xive_irq_priority], + xive_irq_priority); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(xive_eq_debug); + static void xive_core_debugfs_create(void) { struct dentry *xive_dir; + struct dentry *xive_eq_dir; + long cpu; + char name[16]; xive_dir = debugfs_create_dir("xive", arch_debugfs_dir); if (IS_ERR(xive_dir)) @@ -1786,6 +1817,12 @@ static void xive_core_debugfs_create(void) NULL, &xive_ipi_debug_fops); debugfs_create_file("interrupts", 0400, xive_dir, NULL, &xive_irq_debug_fops); + xive_eq_dir = debugfs_create_dir("eqs", xive_dir); + for_each_possible_cpu(cpu) { + snprintf(name, sizeof(name), "cpu%ld", cpu); + debugfs_create_file(name, 0400, xive_eq_dir, (void *)cpu, + &xive_eq_debug_fops); + } } #else static inline void xive_core_debugfs_create(void) { } |