Hello,
I realized that the IPI number (15) is not enabled in Erika. However, when I
use an ivshmem, its interrupt is enabled. For instance, the output of the
following printks:
printk("is IRQ 15 enabled? %d\n", osEE_gic_v2_is_enabled_irq(15));
printk("is IRQ %d enabled? %d\n", IVSHMEM_IRQ,
osEE_gic_v2_is_enabled_irq(IVSHMEM_IRQ));
Are:
Level: is IRQ 15 enabled? 0
Level: is IRQ 145 enabled? 1
Both ISRs are created at the same way in Erika. So my conclusion is that
Jailhouse is not enabling it for the cell.
I tried to enable it in the .pin_bitmap field of the irqchips config, but no
success:
.irqchips = {
/* GIC */ {
.address = 0xf9010000,
.pin_base = 32,
.pin_bitmap = {
1 << 15 | 1 << (54 - 32),
0,
0,
(1 << (144 - 128)) | (1 << (145 - 128)) | (1 << (146 - 128)) |
(1 << (147 - 128)) | (1 << (148 - 128)) | (1 << (149 - 128)),
},
},
},
Any suggestion on how to enable the SGI 15 for the cell?
> gic-demo is able to receive the IPI. So the problem is within Erika interrupt
> configuration.
>
> > Hi,
> >
> > On 9/5/18 8:28 PM, Giovani Gracioli wrote:
> > > Yes, I did enable with Erika API.
> >
> > No, I meant if you tried to receive the SGI via Jailhouse inmates. I
> > don't know Erika internals.
> >
> > Some test like:
> >
> > diff --git a/inmates/demos/arm/gic-demo.c b/inmates/demos/arm/gic-demo.c
> > index b2246deb..86be1b1e 100644
> > --- a/inmates/demos/arm/gic-demo.c
> > +++ b/inmates/demos/arm/gic-demo.c
> > @@ -35,6 +35,8 @@ static void handle_IRQ(unsigned int irqn)
> >
> > if (irqn != TIMER_IRQ)
> > return;
> > + else
> > + printk("Hey, there's some IRQ %u\n", irqn);
> >
> > delta = timer_get_ticks() - expected_ticks;
> > if (delta < min_delta)
> > @@ -59,6 +61,7 @@ void inmate_main(void)
> > printk("Initializing the GIC...\n");
> > gic_setup(handle_IRQ);
> > gic_enable_irq(TIMER_IRQ);
> > + gic_enable_irq(15);
> >
> > printk("Initializing the timer...\n");
> > ticks_per_beat = timer_get_frequency() / BEATS_PER_SEC;
> >
> >
> >
> > Thanks
> > Ralf
> >
> > >
> > > s |= CreateTask( &isr_ivshmem, OSEE_TASK_TYPE_ISR2, handle_IRQ, 1U, 1U,
> > > 1U, OSEE_SYSTEM_STACK );
> > >
> > > SetISR2Source(isr_ivshmem, i);
> > > gic_enable_irq(i); //this is actually from jailhouse api
> > >
> > > Where "i" is the interrupt number. I tried having "i" with 15. Maybe
> > > something in Erika is different. I will try with the gic-demo as well.
> > >
> > >>> Hi,
> > >>>
> > >>> I am playing around IPI among non-root cells (I know it breaks the
> > >>> isolation among cells, but I would like to understand the steps). I
> > >>> forced a call to irqchip_set_pending from CPU 3 to CPU 2 in the
> > >>> gic_handle_sgir_write() function:
> > >>>
> > >>> irqchip_set_pending(per_cpu(2), sgi->id);
> > >>>
> > >>> sgi->id is 15. I can see that CPU 2 receives the IPI:
> > >>>
> > >>> CPU 2 received an SGI 0
> > >>> irqchip_inject_pending irq_id = 15, sender 3
> > >>> gicv2_inject_irq() sender = 3, irq_id = 15
> > >>> CPU 2 writing 268438543 to lr reg (first_free = 0)
> > >>>
> > >>> However, the non-root cell does not receive the IPI (I am running Erika
> > >>> on it).
> > >>
> > >> Did you try to receive the SGI in the gic-demo? You only have to
> > >> instrument handle_IRQ and enable the interrupt.
> > >>
> > >> Ralf
> > >>
> > >>>
> > >>> I do not know in which IRQ number the SGI ID 15 is mapped to. What is
> > >>> the relation of pin_base and pin_bitmap from the config file with SGIs?
> > >>> What value should I write in the irqchips config?
> > >>>
> > >>> Best
> > >>> Giovani
> > >>>
> > >
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