[PATCH v1 1/3] ARM: GICv3 ITS: issue INVALL command after mapping host events

[Volodymyr Babchuk]

Implement TODO by calling the INVALL command. It is working on real
HW, so there is no sense in not doing this.

Signed-off-by: Volodymyr Babchuk <volodymyr_babc...@epam.com>
---
 xen/arch/arm/gic-v3-its.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/gic-v3-its.c b/xen/arch/arm/gic-v3-its.c
index 3aa4edda10..a9c971a55f 100644
--- a/xen/arch/arm/gic-v3-its.c
+++ b/xen/arch/arm/gic-v3-its.c
@@ -236,6 +236,19 @@ static int its_send_cmd_inv(struct host_its *its,
     return its_send_command(its, cmd);
 }
 
+static int its_send_cmd_invall(struct host_its *its,
+                               uint32_t collection_id)
+{
+    uint64_t cmd[4];
+
+    cmd[0] = GITS_CMD_INVALL;
+    cmd[1] = 0x00;
+    cmd[2] = collection_id;
+    cmd[3] = 0x00;
+
+    return its_send_command(its, cmd);
+}
+
 /* Set up the (1:1) collection mapping for the given host CPU. */
 int gicv3_its_setup_collection(unsigned int cpu)
 {
@@ -593,7 +606,9 @@ static int gicv3_its_map_host_events(struct host_its *its,
             return ret;
     }
 
-    /* TODO: Consider using INVALL here. Didn't work on the model, though. */
+    ret = its_send_cmd_invall(its, 0);
+    if ( ret )
+        return ret;
 
     ret = its_send_cmd_sync(its, 0);
     if ( ret )
-- 
2.42.0