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, 68 insertions, 0 deletions

diff --git a/meta-agl-jailhouse/recipes-kernel/linux/linux/0030-ivshmem-net-Refactor-and-comment-ivshm_net_state_cha.patch b/meta-agl-jailhouse/recipes-kernel/linux/linux/0030-ivshmem-net-Refactor-and-comment-ivshm_net_state_cha.patch
new file mode 100644
index 00000000..42ca05a0
--- /dev/null
+++ b/meta-agl-jailhouse/recipes-kernel/linux/linux/0030-ivshmem-net-Refactor-and-comment-ivshm_net_state_cha.patch
@@ -0,0 +1,68 @@
+From a3ee1ba8e4948ac4e6e4eae3061b72b3bf867122 Mon Sep 17 00:00:00 2001
+From: Jan Kiszka <jan.kiszka@siemens.com>
+Date: Sun, 4 Mar 2018 13:50:24 +0100
+Subject: [PATCH 30/32] ivshmem-net: Refactor and comment
+ ivshm_net_state_change
+
+This should make the state transitioning logic clearer. Also avoid the
+harmless but redundant netif_carrier_on/ivshm_net_run in RUN state.
+
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+---
+ drivers/net/ivshmem-net.c | 23 ++++++++++++++++++++---
+ 1 file changed, 20 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/net/ivshmem-net.c b/drivers/net/ivshmem-net.c
+index 0c503194b4ec..aba77c232c48 100644
+--- a/drivers/net/ivshmem-net.c
++++ b/drivers/net/ivshmem-net.c
+@@ -575,14 +575,21 @@ static void ivshm_net_state_change(struct work_struct *work)
+ 	struct net_device *ndev = in->napi.dev;
+ 	u32 rstate = readl(&in->ivshm_regs->rstate);
+ 
+-
+ 	switch (in->lstate) {
+ 	case IVSHM_NET_STATE_RESET:
++		/*
++		 * Wait for the remote to leave READY/RUN before transitioning
++		 * to INIT.
++		 */
+ 		if (rstate < IVSHM_NET_STATE_READY)
+ 			ivshm_net_set_state(in, IVSHM_NET_STATE_INIT);
+ 		break;
+ 
+ 	case IVSHM_NET_STATE_INIT:
++		/*
++		 * Wait for the remote to leave RESET before performing the
++		 * initialization and moving to READY.
++		 */
+ 		if (rstate > IVSHM_NET_STATE_RESET) {
+ 			ivshm_net_init_queues(ndev);
+ 			ivshm_net_set_state(in, IVSHM_NET_STATE_READY);
+@@ -594,11 +601,21 @@ static void ivshm_net_state_change(struct work_struct *work)
+ 		break;
+ 
+ 	case IVSHM_NET_STATE_READY:
+-	case IVSHM_NET_STATE_RUN:
++		/*
++		 * Link is up and we are running once the remote is in READY or
++		 * RUN.
++		 */
+ 		if (rstate >= IVSHM_NET_STATE_READY) {
+ 			netif_carrier_on(ndev);
+ 			ivshm_net_run(ndev);
+-		} else if (rstate == IVSHM_NET_STATE_RESET) {
++			break;
++		}
++		/* fall through */
++	case IVSHM_NET_STATE_RUN:
++		/*
++		 * If the remote goes to RESET, we need to follow immediately.
++		 */
++		if (rstate == IVSHM_NET_STATE_RESET) {
+ 			netif_carrier_off(ndev);
+ 			ivshm_net_do_stop(ndev);
+ 		}
+-- 
+2.11.0
+