On 2019/9/27 0:17, Marc Zyngier wrote:
On 26/09/2019 15:57, Zenghui Yu wrote:
Hi Marc,
I get one kernel panic with this patch on D05.
Can you please try this (completely untested for now) on top of the
whole series? I'll otherwise give it a go next week.
Yes, it helps. At least I don't see panic any more. Without this change,
the host would get crashed as long as the VM is started.
Thanks,
zenghui
Thanks,
M.
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index bc55327406b7..9d24236d1257 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -3461,15 +3461,16 @@ static void its_vpe_send_cmd(struct its_vpe *vpe,
static void its_vpe_send_inv(struct irq_data *d)
{
+ struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
+
if (gic_rdists->has_direct_lpi) {
- /*
- * Don't mess about. Generating the invalidation is easily
- * done by using the parent irq_data, just like below.
- */
- direct_lpi_inv(d->parent_data);
- } else {
- struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
+ void __iomem *rdbase;
+ /* Target the redistributor this VPE is currently known on */
+ rdbase = per_cpu_ptr(gic_rdists->rdist, vpe->col_idx)->rd_base;
+ gic_write_lpir(d->parent_data->hwirq, rdbase + GICR_INVLPIR);
+ wait_for_syncr(rdbase);
+ } else {
its_vpe_send_cmd(vpe, its_send_inv);
}
}
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