Raspberry 4: XEN support

Added the support for DOM0 in raspberry pi4. The feature agl-virt-xen should be enabled to activate this code.

1512 MB of memory is used for DOM0 machine.

There are limitations:
	- brcmfmac module disabled (bluethooth and Wifi) due to the crash
	- total_memory is set to the 3Gb, as it impacts the USB ports on rasbperry pi4 on Linux kernel 4.19

v2 (jsmoeller): make changes in virtualization-layer conditional to raspberrypi4

Bug-AGL: SPEC-3259
Change-Id: I873fbf1f5498e31ae5f468407502f16e1873f7fc
Signed-off-by: Leonid Lazarev <leonid.lazarev@mera.com>
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/24522
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-boot-test: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>

4 files changed, 54 insertions, 3 deletions

diff --git a/meta-agl-bsp/virtualization-layer/recipes-extended/xen/files/0001-XEN-on-RPi4-1GB-lmitation-workaround-XEN-tries-to-al.patch b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/files/0001-XEN-on-RPi4-1GB-lmitation-workaround-XEN-tries-to-al.patch
new file mode 100644
index 000000000..d83c65257
--- /dev/null
+++ b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/files/0001-XEN-on-RPi4-1GB-lmitation-workaround-XEN-tries-to-al.patch
@@ -0,0 +1,28 @@
+From 2701d65271686dff0cb39ab7da1e821f5dede61e Mon Sep 17 00:00:00 2001
+From: Leonid Lazarev <leonid.lazarev@mera.com>
+Date: Tue, 21 Apr 2020 17:28:16 +0300
+Subject: [PATCH] XEN on RPi4 1GB lmitation workaround:  XEN tries to allocated
+ the memopry for dom0  within first 4GB, but for some reason raspberry pi only
+ allows to load kernel  from 1st GB. Push XEN to allocate first bank for dom0
+ from 1st GB
+
+---
+ xen/arch/arm/domain_build.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
+index dd9c3b73ba..8501a8c8aa 100644
+--- a/xen/arch/arm/domain_build.c
++++ b/xen/arch/arm/domain_build.c
+@@ -281,7 +281,7 @@ static void __init allocate_memory_11(struct domain *d,
+      */
+     while ( order >= min_low_order )
+     {
+-        for ( bits = order ; bits <= (lowmem ? 32 : PADDR_BITS); bits++ )
++        for ( bits = order ; bits <= (lowmem ? 30 : PADDR_BITS); bits++ )
+         {
+             pg = alloc_domheap_pages(d, order, MEMF_bits(bits));
+             if ( pg != NULL )
+-- 
+2.17.1
+
diff --git a/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-mkimage.bb b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-mkimage-rpi4.bb
index ae8fe71b6..ae8fe71b6 100644
--- a/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-mkimage.bb
+++ b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-mkimage-rpi4.bb
diff --git a/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-tools_git.bbappend b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-tools_git.bbappend
new file mode 100644
index 000000000..057f4564c
--- /dev/null
+++ b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen-tools_git.bbappend
@@ -0,0 +1,11 @@
+
+# make the package specific to the machine for now
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+# rpi4
+LIC_FILES_CHKSUM_raspberrypi4 = "file://COPYING;md5=4295d895d4b5ce9d070263d52f030e49"
+XEN_REL_raspberrypi4 = "4.13"
+SRCREV_raspberrypi4 = "721f2c323ca55c77857c93e7275b4a93a0e15e1f"
+SRC_URI_raspberrypi4 = " \
+    git://xenbits.xen.org/xen.git;branch=${XEN_BRANCH} \
+    "
diff --git a/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen_git.bbappend b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen_git.bbappend
index 70c7fd415..1b9aaf4ca 100644
--- a/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen_git.bbappend
+++ b/meta-agl-bsp/virtualization-layer/recipes-extended/xen/xen_git.bbappend
@@ -1,6 +1,18 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
 
-XEN_REL = "4.13"
-XEN_BRANCH = "stable"
-SRCREV = "721f2c323ca55c77857c93e7275b4a93a0e15e1f"
+# make the package machine-specific
+PACKAGE_ARCH = "${MACHINE_ARCH}"
 
+# rpi4 specifics
+LIC_FILES_CHKSUM_raspberrypi4 = "file://COPYING;md5=4295d895d4b5ce9d070263d52f030e49"
+XEN_REL_raspberrypi4 = "4.13"
+
+SRCREV_raspberrypi4 = "721f2c323ca55c77857c93e7275b4a93a0e15e1f"
+SRC_URI_append_raspberrypi4 = " file://0001-XEN-on-RPi4-1GB-lmitation-workaround-XEN-tries-to-al.patch"
+
+#due to incorrect xen binary preparation in external library, we add additional deploy
+do_deploy_append_raspberrypi4() {
+    if [ -f ${B}/xen/xen ]; then
+        install -m 0644 ${B}/xen/xen ${DEPLOYDIR}/xen-${MACHINE}
+    fi
+}