Messages in this thread Patch in this message | | | From | Oliver Upton <> | Subject | [PATCH 3/3] irqchip/gic-v3-its: Print the vPE table installed in redistributor | Date | Mon, 19 Feb 2024 18:58:08 +0000 |
| |
Hindsight is 20/20 of course, but the recent vPE table programming bug could've been root caused a bit more quickly if we print the table getting installed at every redistributor.
Promote to pr_info() and add some additional context, such as the provenance of the installed vPE table.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev> --- drivers/irqchip/irq-gic-v3-its.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 63d1743f08cc..c3ef9665a2ad 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -2835,7 +2835,8 @@ static int allocate_vpe_l1_table(void) u64 val, gpsz, npg, pa; unsigned int psz = SZ_64K; unsigned int np, epp, esz; - struct page *page; + struct page *page = NULL; + bool from_its = false; if (!gic_rdists->has_rvpeid) return 0; @@ -2865,8 +2866,10 @@ static int allocate_vpe_l1_table(void) return -ENOMEM; val = inherit_vpe_l1_table_from_its(); - if (val & GICR_VPROPBASER_4_1_VALID) + if (val & GICR_VPROPBASER_4_1_VALID) { + from_its = true; goto out; + } /* First probe the page size */ val = FIELD_PREP(GICR_VPROPBASER_4_1_PAGE_SIZE, GIC_PAGE_SIZE_64K); @@ -2945,9 +2948,12 @@ static int allocate_vpe_l1_table(void) gicr_write_vpropbaser(val, vlpi_base + GICR_VPROPBASER); cpumask_set_cpu(smp_processor_id(), gic_data_rdist()->vpe_table_mask); - pr_debug("CPU%d: VPROPBASER = %llx %*pbl\n", - smp_processor_id(), val, - cpumask_pr_args(gic_data_rdist()->vpe_table_mask)); + pr_info("CPU%d: Using %s vPE table @%llx (%s)\n", + smp_processor_id(), + (val & GICR_VPROPBASER_4_1_INDIRECT) ? "indirect" : "direct", + val & GICR_VPROPBASER_4_1_ADDR, + (page) ? "allocated" : + ((from_its) ? "inherited from ITS" : "inherited from RD")); return 0; } -- 2.44.0.rc0.258.g7320e95886-goog
| |