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authorLinus Torvalds <torvalds@linux-foundation.org>2018-11-10 16:07:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-11-10 16:07:21 +0300
commit35c55685fc807fb536067602418f4a12dde23987 (patch)
tree34d2a5ea3a0b1f5be274f890cba795201ab097ef /arch/arm64
parentd5335b3dfc614fbb4ce2b352177f38521ec3ecdd (diff)
parent24cc61d8cb5a9232fadf21a830061853c1268fdd (diff)
downloadlinux-35c55685fc807fb536067602418f4a12dde23987.tar.xz
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas: - Fix occasional page fault during boot due to memblock resizing before the linear map is up. - Define NET_IP_ALIGN to 0 to improve the DMA performance on some platforms. - lib/raid6 test build fix. - .mailmap update for Punit Agrawal * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: memblock: don't permit memblock resizing until linear mapping is up arm64: mm: define NET_IP_ALIGN to 0 lib/raid6: Fix arm64 test build mailmap: Update email for Punit Agrawal
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/processor.h8
-rw-r--r--arch/arm64/mm/init.c2
-rw-r--r--arch/arm64/mm/mmu.c2
3 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 3e2091708b8e..6b0d4dff5012 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -24,6 +24,14 @@
#define KERNEL_DS UL(-1)
#define USER_DS (TASK_SIZE_64 - 1)
+/*
+ * On arm64 systems, unaligned accesses by the CPU are cheap, and so there is
+ * no point in shifting all network buffers by 2 bytes just to make some IP
+ * header fields appear aligned in memory, potentially sacrificing some DMA
+ * performance on some platforms.
+ */
+#define NET_IP_ALIGN 0
+
#ifndef __ASSEMBLY__
#ifdef __KERNEL__
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 9d9582cac6c4..9b432d9fcada 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -483,8 +483,6 @@ void __init arm64_memblock_init(void)
high_memory = __va(memblock_end_of_DRAM() - 1) + 1;
dma_contiguous_reserve(arm64_dma_phys_limit);
-
- memblock_allow_resize();
}
void __init bootmem_init(void)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 394b8d554def..d1d6601b385d 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -659,6 +659,8 @@ void __init paging_init(void)
memblock_free(__pa_symbol(init_pg_dir),
__pa_symbol(init_pg_end) - __pa_symbol(init_pg_dir));
+
+ memblock_allow_resize();
}
/*