--- zzzz-none-000/linux-3.10.107/arch/powerpc/platforms/85xx/qemu_e500.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/platforms/85xx/qemu_e500.c	2021-02-04 17:41:59.000000000 +0000
@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/of_fdt.h>
 #include <asm/machdep.h>
+#include <asm/pgtable.h>
 #include <asm/time.h>
 #include <asm/udbg.h>
 #include <asm/mpic.h>
@@ -44,6 +45,15 @@
 
 	fsl_pci_assign_primary();
 	swiotlb_detect_4g();
+#if defined(CONFIG_FSL_PCI) && defined(CONFIG_ZONE_DMA32)
+	/*
+	 * Inbound windows don't cover the full lower 4 GiB
+	 * due to conflicts with PCICSRBAR and outbound windows,
+	 * so limit the DMA32 zone to 2 GiB, to allow consistent
+	 * allocations to succeed.
+	 */
+	limit_zone_pfn(ZONE_DMA32, 1UL << (31 - PAGE_SHIFT));
+#endif
 	mpc85xx_smp_init();
 }
 
@@ -66,6 +76,7 @@
 	.init_IRQ		= qemu_e500_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
+	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 #endif
 	.get_irq		= mpic_get_coreint_irq,
 	.restart		= fsl_rstcr_restart,