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authorLeonid Lazarev <leonid.lazarev@mera.com>2020-05-15 11:51:48 +0300
committerJan-Simon Moeller <jsmoeller@linuxfoundation.org>2020-05-26 17:12:19 +0000
commit4028c726be78adc1f1df3708dbe99f9eb2303790 (patch)
treea612c618ec8689bd785e816582116c4cf81cc681 /meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch
parent30063de420b4f6c993dd3f2021ab84f622d69320 (diff)
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>
Diffstat (limited to 'meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch')
-rw-r--r--meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch31
1 files changed, 31 insertions, 0 deletions
diff --git a/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch
new file mode 100644
index 0000000..835f36d
--- /dev/null
+++ b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/files/0003-Fix-PCIe-in-dom0-for-RPi4.patch
@@ -0,0 +1,31 @@
+From 77765c2a47ce43911b8fe7b09f037c9bc13008ca Mon Sep 17 00:00:00 2001
+From: Jeff Kubascik <jeff.kubascik@dornerworks.com>
+Date: Tue, 30 Jul 2019 08:49:56 -0400
+Subject: [PATCH 3/4] Fix PCIe in dom0 for RPi4
+
+There is an issue where the Broadcom PCIe driver and Xen swiotlb layer
+invoke each other's dma alloc function recursively until the stack blows
+up. The cause appears to be due to arch_setup_dma_ops being called
+more than once for the device, possibly through of_dma_configure, and
+screwing up the dma_ops pointers. This patch adds a check to make sure
+that the xen_dma_ops are applied only once for a device.
+---
+ arch/arm64/mm/dma-mapping.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
+index d3a5bb16f..243a3b9be 100644
+--- a/arch/arm64/mm/dma-mapping.c
++++ b/arch/arm64/mm/dma-mapping.c
+@@ -895,7 +895,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
+ __iommu_setup_dma_ops(dev, dma_base, size, iommu);
+
+ #ifdef CONFIG_XEN
+- if (xen_initial_domain()) {
++ if (!dev->archdata.dev_dma_ops && xen_initial_domain()) {
+ dev->archdata.dev_dma_ops = dev->dma_ops;
+ dev->dma_ops = xen_dma_ops;
+ }
+--
+2.17.1
+