From 22d238f25de92f0c606d55a66b85414b320f7d1c Mon Sep 17 00:00:00 2001 From: Sekhar Nori Date: Tue, 9 Jan 2024 14:15:51 +0530 Subject: [PATCH] arch: mach-k3: Fix incorrect mapping of higher DDR addresses as device memory Entry for physical address 0x500000000 in memory map table for MMU configuration is spilling over and inadvertently making DDR available at higher address (above 4GB address space) get mapped as device memory (nGnRnE). Fix this by adjusting entry size. Tested on AM62A SK. Before this patch: => time crc32 0x881000000 0x20000000 crc32 for 881000000 ... 8a0ffffff ==> 7f34d7ca time: 1 minutes, 14.716 seconds After patch: => time crc32 0x881000000 0x20000000 crc32 for 881000000 ... 8a0ffffff ==> 7f34d7ca time: 2.710 seconds Acked-by: Andrew Davis Signed-off-by: Sekhar Nori Reviewed-by: Nishanth Menon --- arch/arm/mach-k3/arm64-mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-k3/arm64-mmu.c b/arch/arm/mach-k3/arm64-mmu.c index b4308205b2..0e07b1b7ce 100644 --- a/arch/arm/mach-k3/arm64-mmu.c +++ b/arch/arm/mach-k3/arm64-mmu.c @@ -41,7 +41,7 @@ struct mm_region k3_mem_map[] = { }, { .virt = 0x500000000UL, .phys = 0x500000000UL, - .size = 0x400000000UL, + .size = 0x380000000UL, .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | PTE_BLOCK_NON_SHARE | PTE_BLOCK_PXN | PTE_BLOCK_UXN -- 2.39.5