From c1f98096113352eb13b3c620832d7c716fe4c626 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Wed, 31 Mar 2021 16:45:12 +0200 Subject: [PATCH] powerpc/xive: Fix xmon command "dxi" MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit [ Upstream commit 33e4bc5946432a4ac173fd08e8e30a13ab94d06d ] When under xmon, the "dxi" command dumps the state of the XIVE interrupts. If an interrupt number is specified, only the state of the associated XIVE interrupt is dumped. This form of the command lacks an irq_data parameter which is nevertheless used by xmon_xive_get_irq_config(), leading to an xmon crash. Fix that by doing a lookup in the system IRQ mapping to query the IRQ descriptor data. Invalid interrupt numbers, or not belonging to the XIVE IRQ domain, OPAL event interrupt number for instance, should be caught by the previous query done at the firmware level. Fixes: 97ef27507793 ("powerpc/xive: Fix xmon support on the PowerNV platform") Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Cédric Le Goater Tested-by: Greg Kurz Reviewed-by: Greg Kurz Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210331144514.892250-8-clg@kaod.org Signed-off-by: Sasha Levin --- arch/powerpc/sysdev/xive/common.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 5899ffb28c58..5b0f6b6278e3 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -261,17 +261,20 @@ notrace void xmon_xive_do_dump(int cpu) xmon_printf("\n"); } +static struct irq_data *xive_get_irq_data(u32 hw_irq) +{ + unsigned int irq = irq_find_mapping(xive_irq_domain, hw_irq); + + return irq ? irq_get_irq_data(irq) : NULL; +} + int xmon_xive_get_irq_config(u32 hw_irq, struct irq_data *d) { - struct irq_chip *chip = irq_data_get_irq_chip(d); int rc; u32 target; u8 prio; u32 lirq; - if (!is_xive_irq(chip)) - return -EINVAL; - 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); @@ -281,6 +284,9 @@ int xmon_xive_get_irq_config(u32 hw_irq, struct irq_data *d) xmon_printf("IRQ 0x%08x : target=0x%x prio=%02x lirq=0x%x ", hw_irq, target, prio, lirq); + if (!d) + d = xive_get_irq_data(hw_irq); + if (d) { struct xive_irq_data *xd = irq_data_get_irq_handler_data(d); u64 val = xive_esb_read(xd, XIVE_ESB_GET);