[Xen-devel] [RFC PATCH 14/24] ARM: vITS: handle INT command

[Andre Przywara <andre.przywara@xxxxxxx>]

The INT command sets a given LPI identified by a DeviceID/EventID pair
as pending and thus triggers it to be injected.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
---
 xen/arch/arm/vgic-its.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/xen/arch/arm/vgic-its.c b/xen/arch/arm/vgic-its.c
index 99d9e9c..7072753 100644
--- a/xen/arch/arm/vgic-its.c
+++ b/xen/arch/arm/vgic-its.c
@@ -192,6 +192,37 @@ static int its_handle_clear(struct virt_its *its, uint64_t 
*cmdptr)
     return 0;
 }
 
+static int its_handle_int(struct virt_its *its, uint64_t *cmdptr)
+{
+    uint32_t devid = its_cmd_get_deviceid(cmdptr);
+    uint32_t eventid = its_cmd_get_id(cmdptr);
+    struct vits_itte *itte;
+    struct vcpu *vcpu;
+    int ret = -1;
+    uint32_t vlpi;
+
+    spin_lock(&its->its_lock);
+
+    itte = get_devid_evid(its, devid, eventid);
+    if ( !itte )
+        goto out_unlock;
+
+    vcpu = its->d->vcpu[itte->collection];
+    vlpi = itte->vlpi;
+
+    ret = 0;
+
+    put_devid_evid(its, itte);
+
+out_unlock:
+    spin_unlock(&its->its_lock);
+
+    if ( !ret)
+        vgic_vcpu_inject_irq(vcpu, vlpi);
+
+    return ret;
+}
+
 #define ITS_CMD_BUFFER_SIZE(baser)      ((((baser) & 0xff) + 1) << 12)
 
 static int vgic_its_handle_cmds(struct domain *d, struct virt_its *its,
@@ -215,6 +246,9 @@ static int vgic_its_handle_cmds(struct domain *d, struct 
virt_its *its,
         case GITS_CMD_CLEAR:
             its_handle_clear(its, cmdptr);
             break;
+        case GITS_CMD_INT:
+            its_handle_int(its, cmdptr);
+            break;
         case GITS_CMD_SYNC:
             /* We handle ITS commands synchronously, so we ignore SYNC. */
            break;
-- 
2.9.0


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