@@ -316,6 +316,40 @@ static int its_handle_inv(struct virt_its *its, uint64_t *cmdptr)
return 0;
}
+/*
+ * INVALL updates the per-LPI configuration status for every LPI mapped to
+ * a particular redistributor. Since our property table is referenced when
+ * needed, we don't need to sync anything, really. But we have to take care
+ * of LPIs getting enabled if there is an interrupt pending.
+ * To catch every LPI without iterating through the device table we just
+ * look for set bits in our virtual pending table and check the status of
+ * the enabled bit in the respective property table entry.
+ * This actually covers every (pending) LPI from every redistributor,
+ * but update_lpi_enabled_status() is a NOP for LPIs not being mapped
+ * to the redistributor/VCPU we are interested in.
+ */
+static int its_handle_invall(struct virt_its *its, uint64_t *cmdptr)
+{
+ uint32_t collid = its_cmd_get_collection(cmdptr);
+ struct vcpu *vcpu;
+ int vlpi = 0;
+
+ spin_lock(&its->its_lock);
+ vcpu = get_vcpu_from_collection(its, collid);
+ spin_unlock(&its->its_lock);
+
+ do {
+ vlpi = find_next_bit(vcpu->arch.vgic.pendtable,
+ its->d->arch.vgic.nr_lpis, vlpi);
+ if ( vlpi >= its->d->arch.vgic.nr_lpis )
+ break;
+
+ update_lpi_enabled_status(its, vcpu, vlpi);
+ } while (1);
+
+ return 0;
+}
+
static int its_handle_mapc(struct virt_its *its, uint64_t *cmdptr)
{
uint32_t collid = its_cmd_get_collection(cmdptr);
@@ -462,6 +496,9 @@ static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its,
case GITS_CMD_INV:
its_handle_inv(its, cmdptr);
break;
+ case GITS_CMD_INVALL:
+ its_handle_invall(its, cmdptr);
+ break;
case GITS_CMD_MAPC:
its_handle_mapc(its, cmdptr);
break;
The INVALL command instructs an ITS to invalidate the configuration data for all LPIs associated with a given redistributor (read: VCPU). This is nasty to emulate exactly with our architecture, so we just scan the pending table and inject _every_ LPI found there that got enabled. Signed-off-by: Andre Przywara <andre.przywara@arm.com> --- xen/arch/arm/vgic-v3-its.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+)