diff options
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 4eb907f65bd0..d205fafede37 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -794,8 +794,13 @@ static struct its_vpe *its_build_vmapp_cmd(struct its_node *its, its_encode_alloc(cmd, alloc); - /* We can only signal PTZ when alloc==1. Why do we have two bits? */ - its_encode_ptz(cmd, alloc); + /* + * GICv4.1 provides a way to get the VLPI state, which needs the vPE + * to be unmapped first, and in this case, we may remap the vPE + * back while the VPT is not empty. So we can't assume that the + * VPT is empty on map. This is why we never advertise PTZ. + */ + its_encode_ptz(cmd, false); its_encode_vconf_addr(cmd, vconf_addr); its_encode_vmapp_default_db(cmd, desc->its_vmapp_cmd.vpe->vpe_db_lpi); |