Add layer to support Jailhouse hypervisorjellyfish_9.99.2jellyfish/9.99.29.99.2

Jailhouse is a partitioning hypervisor based on Linux. It is able to run
bare-metal applications or (adapted) operating systems besides Linux.
For this purpose, it configures CPU and device virtualization features
of the hardware platform in a way that none of these domains, called
"cells" here, can interfere with each other in an unacceptable way.

This layer adds the Jailhouse package into AGL and also appends the BSPs
to allow it to run. Currently, Raspberry Pi 4 and QEMU x86-64 targets
are supported.

To enable Jailhouse and include it in the image, the AGL feature
agl-jailhouse must be enabled.

Bug-AGL: SPEC-3507

Signed-off-by: Jakub Luzny <jakub@luzny.cz>
Change-Id: I0fbc0b5d931c85d6f22b0222da8c2b106c4115e1

1 files changed, 70 insertions, 0 deletions

diff --git a/meta-agl-jailhouse/recipes-kernel/linux/linux/0024-ivshmem-net-fill-in-and-check-used-descriptor-chain-.patch b/meta-agl-jailhouse/recipes-kernel/linux/linux/0024-ivshmem-net-fill-in-and-check-used-descriptor-chain-.patch
new file mode 100644
index 00000000..7620d682
--- /dev/null
+++ b/meta-agl-jailhouse/recipes-kernel/linux/linux/0024-ivshmem-net-fill-in-and-check-used-descriptor-chain-.patch
@@ -0,0 +1,70 @@
+From be71104c3d4d682f88a4e56e408683b2e8edaef5 Mon Sep 17 00:00:00 2001
+From: Henning Schild <henning.schild@siemens.com>
+Date: Mon, 18 Sep 2017 18:02:08 +0200
+Subject: [PATCH 24/32] ivshmem-net: fill in and check used descriptor chain
+ len
+
+We are using chains of len==1 make that explicit and expect that from
+the remote.
+
+Signed-off-by: Henning Schild <henning.schild@siemens.com>
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+---
+ drivers/net/ivshmem-net.c | 14 ++++++++------
+ 1 file changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/drivers/net/ivshmem-net.c b/drivers/net/ivshmem-net.c
+index fd7d78b84576..556670e779e7 100644
+--- a/drivers/net/ivshmem-net.c
++++ b/drivers/net/ivshmem-net.c
+@@ -335,10 +335,10 @@ static void ivshm_net_tx_clean(struct net_device *ndev)
+ {
+ 	struct ivshm_net *in = netdev_priv(ndev);
+ 	struct ivshm_net_queue *tx = &in->tx;
++	struct vring_used_elem *used;
+ 	struct vring *vr = &tx->vr;
+ 	struct vring_desc *desc;
+ 	struct vring_desc *fdesc;
+-	unsigned int used;
+ 	unsigned int num;
+ 	u16 used_idx;
+ 	u16 last;
+@@ -358,13 +358,14 @@ static void ivshm_net_tx_clean(struct net_device *ndev)
+ 		u32 len;
+ 		u32 tail;
+ 
+-		used = vr->used->ring[last & (vr->num - 1)].id;
+-		if (used >= vr->num) {
+-			netdev_err(ndev, "invalid tx used %d\n", used);
++		used = vr->used->ring + (last % vr->num);
++		if (used->id >= vr->num || used->len != 1) {
++			netdev_err(ndev, "invalid tx used->id %d ->len %d\n",
++				   used->id, used->len);
+ 			break;
+ 		}
+ 
+-		desc = &vr->desc[used];
++		desc = &vr->desc[used->id];
+ 
+ 		data = ivshm_net_desc_data(in, &in->tx, desc, &len);
+ 		if (!data) {
+@@ -383,7 +384,7 @@ static void ivshm_net_tx_clean(struct net_device *ndev)
+ 		else
+ 			desc->next = fhead;
+ 
+-		fhead = used;
++		fhead = used->id;
+ 		last++;
+ 		num++;
+ 	}
+@@ -433,6 +434,7 @@ static void ivshm_net_rx_finish(struct ivshm_net *in, struct vring_desc *desc)
+ 
+ 	used = rx->last_used_idx++ & (vr->num - 1);
+ 	vr->used->ring[used].id = desc_id;
++	vr->used->ring[used].len = 1;
+ 
+ 	virt_store_release(&vr->used->idx, rx->last_used_idx);
+ }
+-- 
+2.11.0
+