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!
