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, 174 insertions, 0 deletions

diff --git a/meta-agl-jailhouse/recipes-kernel/linux/linux/0003-jailhouse-Add-simple-debug-console-via-the-hyperviso.patch b/meta-agl-jailhouse/recipes-kernel/linux/linux/0003-jailhouse-Add-simple-debug-console-via-the-hyperviso.patch
new file mode 100644
index 00000000..289f54ac
--- /dev/null
+++ b/meta-agl-jailhouse/recipes-kernel/linux/linux/0003-jailhouse-Add-simple-debug-console-via-the-hyperviso.patch
@@ -0,0 +1,174 @@
+From faa349f4d096554c6d5bfe74634599d2e26f64a7 Mon Sep 17 00:00:00 2001
+From: Jan Kiszka <jan.kiszka@siemens.com>
+Date: Sun, 11 Sep 2016 23:30:04 +0200
+Subject: [PATCH 03/32] jailhouse: Add simple debug console via the hypervisor
+
+Jailhouse allows explicitly enabled cells to write character-wise
+messages to the hypervisor debug console. Make use of this for a
+platform-agnostic boot diagnosis channel, specifically for non-root
+cells. This also comes with earlycon support.
+
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+---
+ MAINTAINERS                     |   1 +
+ drivers/virt/Kconfig            |  11 +++++
+ drivers/virt/Makefile           |   1 +
+ drivers/virt/jailhouse_dbgcon.c | 103 ++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 116 insertions(+)
+ create mode 100644 drivers/virt/jailhouse_dbgcon.c
+
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 9d3a5c54a41d..07cb4d674c93 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -8761,6 +8761,7 @@ L:	jailhouse-dev@googlegroups.com
+ S:	Maintained
+ F:	arch/x86/kernel/jailhouse.c
+ F:	arch/x86/include/asm/jailhouse_para.h
++F:	drivers/virt/jailhouse_dbgcon.c
+ 
+ JC42.4 TEMPERATURE SENSOR DRIVER
+ M:	Guenter Roeck <linux@roeck-us.net>
+diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig
+index 363af2eaf2ba..99c5eaca6952 100644
+--- a/drivers/virt/Kconfig
++++ b/drivers/virt/Kconfig
+@@ -31,5 +31,16 @@ config FSL_HV_MANAGER
+           4) A kernel interface for receiving callbacks when a managed
+ 	     partition shuts down.
+ 
++config JAILHOUSE_DBGCON
++	tristate "Jailhouse console driver"
++	depends on X86 || ARM || ARM64
++	help
++	  The Jailhouse hypervisor provides a simple write-only console for
++	  debugging the bootstrap process of its cells. This driver registers
++	  a console with the kernel to make use of it.
++
++	  Note that Jailhouse has to be configured to permit a cell the usage
++	  of the console interface.
++
+ source "drivers/virt/vboxguest/Kconfig"
+ endif
+diff --git a/drivers/virt/Makefile b/drivers/virt/Makefile
+index fd331247c27a..89e86a1d0f19 100644
+--- a/drivers/virt/Makefile
++++ b/drivers/virt/Makefile
+@@ -4,4 +4,5 @@
+ #
+ 
+ obj-$(CONFIG_FSL_HV_MANAGER)	+= fsl_hypervisor.o
++obj-$(CONFIG_JAILHOUSE_DBGCON)	+= jailhouse_dbgcon.o
+ obj-y				+= vboxguest/
+diff --git a/drivers/virt/jailhouse_dbgcon.c b/drivers/virt/jailhouse_dbgcon.c
+new file mode 100644
+index 000000000000..1fd201ea1460
+--- /dev/null
++++ b/drivers/virt/jailhouse_dbgcon.c
+@@ -0,0 +1,103 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * Console driver for running over the Jailhouse partitioning hypervisor
++ *
++ * Copyright (c) Siemens AG, 2016-2018
++ *
++ * Authors:
++ *  Jan Kiszka <jan.kiszka@siemens.com>
++ */
++
++#include <linux/console.h>
++#include <linux/hypervisor.h>
++#include <linux/module.h>
++#include <linux/serial_core.h>
++#ifdef CONFIG_X86
++#include <asm/alternative.h>
++#endif
++#ifdef CONFIG_ARM
++#include <asm/opcodes-virt.h>
++#endif
++
++#define JAILHOUSE_HC_DEBUG_CONSOLE_PUTC		8
++
++static void hypervisor_putc(char c)
++{
++#if defined(CONFIG_X86)
++	int result;
++
++	asm volatile(
++		ALTERNATIVE(".byte 0x0f,0x01,0xc1", ".byte 0x0f,0x01,0xd9",
++			    X86_FEATURE_VMMCALL)
++		: "=a" (result)
++		: "a" (JAILHOUSE_HC_DEBUG_CONSOLE_PUTC), "D" (c)
++		: "memory");
++#elif defined(CONFIG_ARM)
++	register u32 num_res asm("r0") = JAILHOUSE_HC_DEBUG_CONSOLE_PUTC;
++	register u32 arg1 asm("r1") = c;
++
++	asm volatile(
++		__HVC(0x4a48)
++		: "=r" (num_res)
++		: "r" (num_res), "r" (arg1)
++		: "memory");
++#elif defined(CONFIG_ARM64)
++	register u64 num_res asm("x0") = JAILHOUSE_HC_DEBUG_CONSOLE_PUTC;
++	register u64 arg1 asm("x1") = c;
++
++	asm volatile(
++		"hvc #0x4a48\n\t"
++		: "=r" (num_res)
++		: "r" (num_res), "r" (arg1)
++		: "memory");
++#else
++#error Unsupported architecture.
++#endif
++}
++
++static void jailhouse_dbgcon_write(struct console *con, const char *s,
++				   unsigned count)
++{
++	while (count > 0) {
++		hypervisor_putc(*s);
++		count--;
++		s++;
++	}
++}
++
++static int __init early_jailhouse_dbgcon_setup(struct earlycon_device *device,
++					       const char *options)
++{
++	device->con->write = jailhouse_dbgcon_write;
++	return 0;
++}
++
++EARLYCON_DECLARE(jailhouse, early_jailhouse_dbgcon_setup);
++
++static struct console jailhouse_dbgcon = {
++	.name = "jailhouse",
++	.write = jailhouse_dbgcon_write,
++	.flags = CON_PRINTBUFFER | CON_ANYTIME,
++	.index = -1,
++};
++
++static int __init jailhouse_dbgcon_init(void)
++{
++	if (!jailhouse_paravirt())
++		return -ENODEV;
++
++	register_console(&jailhouse_dbgcon);
++	return 0;
++}
++
++static void __exit jailhouse_dbgcon_exit(void)
++{
++	unregister_console(&jailhouse_dbgcon);
++}
++
++module_init(jailhouse_dbgcon_init);
++module_exit(jailhouse_dbgcon_exit);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("Jailhouse debug console driver");
++MODULE_AUTHOR("Jan Kiszka <jan.kiszka@siemens.com>");
+-- 
+2.11.0
+