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path: root/drivers/irqchip/irq-gic-v4.c
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Diffstat (limited to 'drivers/irqchip/irq-gic-v4.c')
-rw-r--r--drivers/irqchip/irq-gic-v4.c45
1 files changed, 41 insertions, 4 deletions
diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index c01910d53f9e..117ba6db023d 100644
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -87,6 +87,11 @@ static struct irq_domain *gic_domain;
static const struct irq_domain_ops *vpe_domain_ops;
static const struct irq_domain_ops *sgi_domain_ops;
+static bool has_v4_1(void)
+{
+ return !!sgi_domain_ops;
+}
+
int its_alloc_vcpu_irqs(struct its_vm *vm)
{
int vpe_base_irq, i;
@@ -139,18 +144,50 @@ static int its_send_vpe_cmd(struct its_vpe *vpe, struct its_cmd_info *info)
return irq_set_vcpu_affinity(vpe->irq, info);
}
-int its_schedule_vpe(struct its_vpe *vpe, bool on)
+int its_make_vpe_non_resident(struct its_vpe *vpe, bool db)
{
- struct its_cmd_info info;
+ struct irq_desc *desc = irq_to_desc(vpe->irq);
+ struct its_cmd_info info = { };
int ret;
WARN_ON(preemptible());
- info.cmd_type = on ? SCHEDULE_VPE : DESCHEDULE_VPE;
+ info.cmd_type = DESCHEDULE_VPE;
+ if (has_v4_1()) {
+ /* GICv4.1 can directly deal with doorbells */
+ info.req_db = db;
+ } else {
+ /* Undo the nested disable_irq() calls... */
+ while (db && irqd_irq_disabled(&desc->irq_data))
+ enable_irq(vpe->irq);
+ }
+
+ ret = its_send_vpe_cmd(vpe, &info);
+ if (!ret)
+ vpe->resident = false;
+
+ return ret;
+}
+
+int its_make_vpe_resident(struct its_vpe *vpe, bool g0en, bool g1en)
+{
+ struct its_cmd_info info = { };
+ int ret;
+
+ WARN_ON(preemptible());
+
+ info.cmd_type = SCHEDULE_VPE;
+ if (has_v4_1()) {
+ info.g0en = g0en;
+ info.g1en = g1en;
+ } else {
+ /* Disabled the doorbell, as we're about to enter the guest */
+ disable_irq_nosync(vpe->irq);
+ }
ret = its_send_vpe_cmd(vpe, &info);
if (!ret)
- vpe->resident = on;
+ vpe->resident = true;
return ret;
}