IMX8mq: core can't receive ipi interrupts.

[1541189572]

Hi,

   I am working on hypervisor on imx8mq-evk platform. I send an ipi but core doesn't recevice it. Below is my code.

static void gicv3_send_sgi_list(uint32_t sgi, cpumask_t *mask)

{

        int cpu;

        uint64_t val;

        int list_cluster0 = 0;

        int list_cluster1 = 0;

        uint32_t val_32;

        for_each_cpu (cpu, mask) {

                if (cpu >= CONFIG_NR_CPUS_CLUSTER0)

                        list_cluster1 |= 1 << (cpu - CONFIG_NR_CPUS_CLUSTER0);

                else

                        list_cluster0 |= (1 << cpu);

        }

        /*

         * TBD: now only support two cluster

         */

        if (list_cluster0) {

                val = list_cluster0 | (0ul << 16) | (0ul << 32) | (0ul << 48) |

                 (sgi << 24);

                write_sysreg64(val, ICC_SGI1R_EL1);

        }

        if (list_cluster1) {

                val = list_cluster1 | (1ul << 16) | (0ul << 32) | (0ul << 48) |

                 (sgi << 24);

                write_sysreg64(val, ICC_SGI1R_EL1);

        }

        if (iomuxc_gpr_base) {

                /* pending the IRQ32 to wakeup the core */

                val_32 = readl_relaxed(iomuxc_gpr_base + 0x4);

                val_32 |= (1 << 12);

                writel_relaxed(val_32, iomuxc_gpr_base + 0x4);

                /* delay for a while to make sure cores wakeup done */

                udelay(50);

                val_32 &= ~(1 << 12);

                writel_relaxed(val_32, iomuxc_gpr_base + 0x4);

        }

        isb();

}

References: 

1. https://www.nxp.com/docs/en/errata/IMX8MDQLQ_0N14W.pdf 

2. irq-gic-v3.c\irqchip\drivers - linux-imx - i.MX Linux kernel 

Thanks for any advice!

[igorpadykov]

Hi 书意 程 

for ipi usage one can look at arm community:

Intercore interrupts on a53 between EL1 and EL3 - Cortex-A / A-Profile forum - Processors - Arm Comm... 
interrupt distribution on A53 processor - Cortex-A / A-Profile forum - Processors - Arm Community 

Best regards
igor
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[1541189572]

Thanks for your reply. But i run the code successfully on fvp with gicv3, so i think the code is correct but not work on imx8mq-evk platform. 

[josemartins90]

Hello, have you solved this problem?