bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0434-arm64-mm-use-arm64_dma_phys_limit-instead-of-calling.patch b/target/linux/bcm27xx/patches-5.4/950-0434-arm64-mm-use-arm64_dma_phys_limit-instead-of-calling.patch
new file mode 100644
index 0000000000..c697494f8a
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0434-arm64-mm-use-arm64_dma_phys_limit-instead-of-calling.patch
@@ -0,0 +1,30 @@
+From c17f622cbb33332a305ef383506740d3d01aa831 Mon Sep 17 00:00:00 2001
+From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+Date: Wed, 11 Sep 2019 20:25:43 +0200
+Subject: [PATCH] arm64: mm: use arm64_dma_phys_limit instead of
+ calling max_zone_dma_phys()
+
+commit ae970dc096b2d39f65f2e18d142e3978dc9ee1c7 upstream.
+
+By the time we call zones_sizes_init() arm64_dma_phys_limit already
+contains the result of max_zone_dma_phys(). We use the variable instead
+of calling the function directly to save some precious cpu time.
+
+Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
+Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
+---
+ arch/arm64/mm/init.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/arm64/mm/init.c
++++ b/arch/arm64/mm/init.c
+@@ -181,7 +181,7 @@ static void __init zone_sizes_init(unsig
+ 	unsigned long max_zone_pfns[MAX_NR_ZONES]  = {0};
+ 
+ #ifdef CONFIG_ZONE_DMA32
+-	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(max_zone_dma_phys());
++	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(arm64_dma_phys_limit);
+ #endif
+ 	max_zone_pfns[ZONE_NORMAL] = max;
+