From f0edfea8ef93ed6cc5f747c46c85c8e53e0798a0 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 24 Aug 2018 10:31:08 +0200 Subject: dma-mapping: move the remap helpers to a separate file The dma remap code only makes sense for not cache coherent architectures (or possibly the corner case of highmem CMA allocations) and currently is only used by arm, arm64, csky and xtensa. Split it out into a separate file with a separate Kconfig symbol, which gets the right copyright notice given that this code was written by Laura Abbott working for Code Aurora at that point. Signed-off-by: Christoph Hellwig Acked-by: Laura Abbott Reviewed-by: Robin Murphy --- arch/xtensa/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/xtensa') diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index d29b7365da8d..239bfb16c58b 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -11,6 +11,7 @@ config XTENSA select CLONE_BACKWARDS select COMMON_CLK select DMA_DIRECT_OPS + select DMA_REMAP if MMU select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS select GENERIC_IRQ_SHOW -- cgit v1.2.3-59-g8ed1b From 7c703e54cc71df5baa962e24a5663d88173bba5c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 9 Nov 2018 09:51:00 +0100 Subject: arch: switch the default on ARCH_HAS_SG_CHAIN These days architectures are mostly out of the business of dealing with struct scatterlist at all, unless they have architecture specific iommu drivers. Replace the ARCH_HAS_SG_CHAIN symbol with a ARCH_NO_SG_CHAIN one only enabled for architectures with horrible legacy iommu drivers like alpha and parisc, and conditionally for arm which wants to keep it disable for legacy platforms. Signed-off-by: Christoph Hellwig Reviewed-by: Palmer Dabbelt --- .../features/io/sg-chain/arch-support.txt | 33 ---------------------- arch/alpha/Kconfig | 1 + arch/arc/Kconfig | 1 - arch/arm/Kconfig | 2 +- arch/arm64/Kconfig | 1 - arch/ia64/Kconfig | 1 - arch/parisc/Kconfig | 1 + arch/powerpc/Kconfig | 1 - arch/s390/Kconfig | 1 - arch/sparc/Kconfig | 1 - arch/x86/Kconfig | 1 - arch/xtensa/Kconfig | 1 - include/linux/scatterlist.h | 6 ++-- lib/Kconfig | 2 +- lib/scatterlist.c | 2 +- 15 files changed, 8 insertions(+), 47 deletions(-) delete mode 100644 Documentation/features/io/sg-chain/arch-support.txt (limited to 'arch/xtensa') diff --git a/Documentation/features/io/sg-chain/arch-support.txt b/Documentation/features/io/sg-chain/arch-support.txt deleted file mode 100644 index 6554f0372c3f..000000000000 --- a/Documentation/features/io/sg-chain/arch-support.txt +++ /dev/null @@ -1,33 +0,0 @@ -# -# Feature name: sg-chain -# Kconfig: ARCH_HAS_SG_CHAIN -# description: arch supports chained scatter-gather lists -# - ----------------------- - | arch |status| - ----------------------- - | alpha: | TODO | - | arc: | ok | - | arm: | ok | - | arm64: | ok | - | c6x: | TODO | - | h8300: | TODO | - | hexagon: | TODO | - | ia64: | ok | - | m68k: | TODO | - | microblaze: | TODO | - | mips: | TODO | - | nds32: | TODO | - | nios2: | TODO | - | openrisc: | TODO | - | parisc: | TODO | - | powerpc: | ok | - | riscv: | TODO | - | s390: | ok | - | sh: | TODO | - | sparc: | ok | - | um: | TODO | - | unicore32: | TODO | - | x86: | ok | - | xtensa: | TODO | - ----------------------- diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 5b4f88363453..a7e748a46c18 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -5,6 +5,7 @@ config ALPHA select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO select ARCH_NO_PREEMPT + select ARCH_NO_SG_CHAIN select ARCH_USE_CMPXCHG_LOCKREF select HAVE_AOUT select HAVE_IDE diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index c9e2a1323536..fd48d698da29 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -13,7 +13,6 @@ config ARC select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE - select ARCH_HAS_SG_CHAIN select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 3b2852df6eb3..a858ee791ef0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -19,6 +19,7 @@ config ARM select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_MIGHT_HAVE_PC_PARPORT + select ARCH_NO_SG_CHAIN if !ARM_HAS_SG_CHAIN select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7 select ARCH_SUPPORTS_ATOMIC_RMW @@ -119,7 +120,6 @@ config ARM . config ARM_HAS_SG_CHAIN - select ARCH_HAS_SG_CHAIN bool config ARM_DMA_USE_IOMMU diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 2e645ea693ea..06cf0ef24367 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -23,7 +23,6 @@ config ARM64 select ARCH_HAS_MEMBARRIER_SYNC_CORE select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_SET_MEMORY - select ARCH_HAS_SG_CHAIN select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_SYNC_DMA_FOR_DEVICE diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 36773def6920..d6f203658994 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -29,7 +29,6 @@ config IA64 select HAVE_MEMBLOCK_NODE_MAP select HAVE_VIRT_CPU_ACCOUNTING select ARCH_HAS_DMA_MARK_CLEAN - select ARCH_HAS_SG_CHAIN select VIRT_TO_BUS select ARCH_DISCARD_MEMBLOCK select GENERIC_IRQ_PROBE diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 92a339ee28b3..428ee50fc3db 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -11,6 +11,7 @@ config PARISC select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_NO_SG_CHAIN select ARCH_SUPPORTS_MEMORY_FAILURE select RTC_CLASS select RTC_DRV_GENERIC diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 8be31261aec8..4bc8edd83cee 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -138,7 +138,6 @@ config PPC select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_MEMBARRIER_CALLBACKS select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC64 - select ARCH_HAS_SG_CHAIN select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !RELOCATABLE && !HIBERNATION) select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAS_UACCESS_FLUSHCACHE if PPC64 diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 5173366af8f3..5624e8607054 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -73,7 +73,6 @@ config S390 select ARCH_HAS_KCOV select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_SET_MEMORY - select ARCH_HAS_SG_CHAIN select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_UBSAN_SANITIZE_ALL diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 490b2c95c212..8853b6ceae17 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -40,7 +40,6 @@ config SPARC select MODULES_USE_ELF_RELA select ODD_RT_SIGACTION select OLD_SIGSUSPEND - select ARCH_HAS_SG_CHAIN select CPU_NO_EFFICIENT_FFS select LOCKDEP_SMALL if LOCKDEP select NEED_DMA_MAP_STATE diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9d734f3c8234..adc845b66f01 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -66,7 +66,6 @@ config X86 select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 select ARCH_HAS_UACCESS_MCSAFE if X86_64 && X86_MCE select ARCH_HAS_SET_MEMORY - select ARCH_HAS_SG_CHAIN select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 239bfb16c58b..75488b606edc 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -1,7 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 config XTENSA def_bool y - select ARCH_HAS_SG_CHAIN select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_NO_COHERENT_DMA_MMAP if !MMU diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index 093aa57120b0..b96f0d0b5b8f 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -324,10 +324,10 @@ size_t sg_zero_buffer(struct scatterlist *sgl, unsigned int nents, * Like SG_CHUNK_SIZE, but for archs that have sg chaining. This limit * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. */ -#ifdef CONFIG_ARCH_HAS_SG_CHAIN -#define SG_MAX_SEGMENTS 2048 -#else +#ifdef CONFIG_ARCH_NO_SG_CHAIN #define SG_MAX_SEGMENTS SG_CHUNK_SIZE +#else +#define SG_MAX_SEGMENTS 2048 #endif #ifdef CONFIG_SG_POOL diff --git a/lib/Kconfig b/lib/Kconfig index a9965f4af4dd..d5a5e2ebf286 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -577,7 +577,7 @@ config SG_POOL # sg chaining option # -config ARCH_HAS_SG_CHAIN +config ARCH_NO_SG_CHAIN def_bool n config ARCH_HAS_PMEM_API diff --git a/lib/scatterlist.c b/lib/scatterlist.c index 7c6096a71704..9ba349e775ef 100644 --- a/lib/scatterlist.c +++ b/lib/scatterlist.c @@ -271,7 +271,7 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents, if (nents == 0) return -EINVAL; -#ifndef CONFIG_ARCH_HAS_SG_CHAIN +#ifdef CONFIG_ARCH_NO_SG_CHAIN if (WARN_ON_ONCE(nents > max_ents)) return -EINVAL; #endif -- cgit v1.2.3-59-g8ed1b From 3731c3d4774e38b9d91c01943e1e6a243c1776be Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 6 Dec 2018 12:50:26 -0800 Subject: dma-mapping: always build the direct mapping code All architectures except for sparc64 use the dma-direct code in some form, and even for sparc64 we had the discussion of a direct mapping mode a while ago. In preparation for directly calling the direct mapping code don't bother having it optionally but always build the code in. This is a minor hardship for some powerpc and arm configs that don't pull it in yet (although they should in a relase ot two), and sparc64 which currently doesn't need it at all, but it will reduce the ifdef mess we'd otherwise need significantly. Signed-off-by: Christoph Hellwig Acked-by: Jesper Dangaard Brouer Tested-by: Jesper Dangaard Brouer Tested-by: Tony Luck --- arch/alpha/Kconfig | 1 - arch/arc/Kconfig | 1 - arch/arm/Kconfig | 1 - arch/arm64/Kconfig | 1 - arch/c6x/Kconfig | 1 - arch/csky/Kconfig | 1 - arch/h8300/Kconfig | 1 - arch/hexagon/Kconfig | 1 - arch/m68k/Kconfig | 1 - arch/microblaze/Kconfig | 1 - arch/mips/Kconfig | 1 - arch/nds32/Kconfig | 1 - arch/nios2/Kconfig | 1 - arch/openrisc/Kconfig | 1 - arch/parisc/Kconfig | 1 - arch/riscv/Kconfig | 1 - arch/s390/Kconfig | 1 - arch/sh/Kconfig | 1 - arch/sparc/Kconfig | 1 - arch/unicore32/Kconfig | 1 - arch/x86/Kconfig | 1 - arch/xtensa/Kconfig | 1 - kernel/dma/Kconfig | 7 ------- kernel/dma/Makefile | 3 +-- 24 files changed, 1 insertion(+), 31 deletions(-) (limited to 'arch/xtensa') diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index a7e748a46c18..5da6ff54b3e7 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -203,7 +203,6 @@ config ALPHA_EIGER config ALPHA_JENSEN bool "Jensen" depends on BROKEN - select DMA_DIRECT_OPS help DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one of the first-generation Alpha systems. A number of these systems diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index fd48d698da29..7deaabeb531a 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -17,7 +17,6 @@ config ARC select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select COMMON_CLK - select DMA_DIRECT_OPS select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC) select GENERIC_CLOCKEVENTS select GENERIC_FIND_FIRST_BIT diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a858ee791ef0..586fc30b23bd 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -30,7 +30,6 @@ config ARM select CLONE_BACKWARDS select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS - select DMA_DIRECT_OPS if !MMU select DMA_REMAP if MMU select EDAC_SUPPORT select EDAC_ATOMIC_SCRUB diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 06cf0ef24367..2092080240b0 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -80,7 +80,6 @@ config ARM64 select CPU_PM if (SUSPEND || CPU_IDLE) select CRC32 select DCACHE_WORD_ACCESS - select DMA_DIRECT_OPS select DMA_DIRECT_REMAP select EDAC_SUPPORT select FRAME_POINTER diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig index 84420109113d..456e154674d1 100644 --- a/arch/c6x/Kconfig +++ b/arch/c6x/Kconfig @@ -9,7 +9,6 @@ config C6X select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select CLKDEV_LOOKUP - select DMA_DIRECT_OPS select GENERIC_ATOMIC64 select GENERIC_IRQ_SHOW select HAVE_ARCH_TRACEHOOK diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index ea74f3a9eeaf..37bed8aadf95 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -7,7 +7,6 @@ config CSKY select COMMON_CLK select CLKSRC_MMIO select CLKSRC_OF - select DMA_DIRECT_OPS select DMA_DIRECT_REMAP select IRQ_DOMAIN select HANDLE_DOMAIN_IRQ diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index d19c6b16cd5d..6472a0685470 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -22,7 +22,6 @@ config H8300 select HAVE_ARCH_KGDB select HAVE_ARCH_HASH select CPU_NO_EFFICIENT_FFS - select DMA_DIRECT_OPS config CPU_BIG_ENDIAN def_bool y diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 2b688af379e6..d71036c598de 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -31,7 +31,6 @@ config HEXAGON select GENERIC_CLOCKEVENTS_BROADCAST select MODULES_USE_ELF_RELA select GENERIC_CPU_DEVICES - select DMA_DIRECT_OPS ---help--- Qualcomm Hexagon is a processor architecture designed for high performance and low power across a wide variety of applications. diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 1bc9f1ba759a..8a5868e9a3a0 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -26,7 +26,6 @@ config M68K select MODULES_USE_ELF_RELA select OLD_SIGSUSPEND3 select OLD_SIGACTION - select DMA_DIRECT_OPS if HAS_DMA select ARCH_DISCARD_MEMBLOCK config CPU_BIG_ENDIAN diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index effed2efd306..eda9e2315ef5 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -12,7 +12,6 @@ config MICROBLAZE select TIMER_OF select CLONE_BACKWARDS3 select COMMON_CLK - select DMA_DIRECT_OPS select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS select GENERIC_CPU_DEVICES diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 8272ea4c7264..2993aa9842c0 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -16,7 +16,6 @@ config MIPS select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select CPU_PM if CPU_IDLE - select DMA_DIRECT_OPS select GENERIC_ATOMIC64 if !64BIT select GENERIC_CLOCKEVENTS select GENERIC_CMOS_UPDATE diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig index 7a04adacb2f0..1af6bbae7220 100644 --- a/arch/nds32/Kconfig +++ b/arch/nds32/Kconfig @@ -11,7 +11,6 @@ config NDS32 select CLKSRC_MMIO select CLONE_BACKWARDS select COMMON_CLK - select DMA_DIRECT_OPS select GENERIC_ATOMIC64 select GENERIC_CPU_DEVICES select GENERIC_CLOCKEVENTS diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig index 7e95506e957a..f6c4b0f49997 100644 --- a/arch/nios2/Kconfig +++ b/arch/nios2/Kconfig @@ -4,7 +4,6 @@ config NIOS2 select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_NO_SWAP - select DMA_DIRECT_OPS select TIMER_OF select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index 285f7d05c8ed..d0feebad5a8f 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -7,7 +7,6 @@ config OPENRISC def_bool y select ARCH_HAS_SYNC_DMA_FOR_DEVICE - select DMA_DIRECT_OPS select OF select OF_EARLY_FLATTREE select IRQ_DOMAIN diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 428ee50fc3db..6e1b71da0e71 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -185,7 +185,6 @@ config PA11 depends on PA7000 || PA7100LC || PA7200 || PA7300LC select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE - select DMA_DIRECT_OPS select DMA_NONCOHERENT_CACHE_SYNC config PREFETCH diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 55da93f4e818..51d89c4b1dca 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -19,7 +19,6 @@ config RISCV select ARCH_WANT_FRAME_POINTERS select CLONE_BACKWARDS select COMMON_CLK - select DMA_DIRECT_OPS select GENERIC_CLOCKEVENTS select GENERIC_CPU_DEVICES select GENERIC_IRQ_SHOW diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 5624e8607054..21d271d04ca6 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -139,7 +139,6 @@ config S390 select HAVE_COPY_THREAD_TLS select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS - select DMA_DIRECT_OPS select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS select HAVE_EFFICIENT_UNALIGNED_ACCESS diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index f82a4da7adf3..10fd4e9c454b 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -7,7 +7,6 @@ config SUPERH select ARCH_NO_COHERENT_DMA_MMAP if !MMU select HAVE_PATA_PLATFORM select CLKDEV_LOOKUP - select DMA_DIRECT_OPS select HAVE_IDE if HAS_IOPORT_MAP select HAVE_MEMBLOCK_NODE_MAP select ARCH_DISCARD_MEMBLOCK diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 8853b6ceae17..f5bb9ded1d18 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -48,7 +48,6 @@ config SPARC config SPARC32 def_bool !64BIT select ARCH_HAS_SYNC_DMA_FOR_CPU - select DMA_DIRECT_OPS select GENERIC_ATOMIC64 select CLZ_TAB select HAVE_UID16 diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index a4c05159dca5..2681027d7bff 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -4,7 +4,6 @@ config UNICORE32 select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO - select DMA_DIRECT_OPS select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index adc845b66f01..c14d4a35be13 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -89,7 +89,6 @@ config X86 select CLOCKSOURCE_VALIDATE_LAST_CYCLE select CLOCKSOURCE_WATCHDOG select DCACHE_WORD_ACCESS - select DMA_DIRECT_OPS select EDAC_ATOMIC_SCRUB select EDAC_SUPPORT select GENERIC_CLOCKEVENTS diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 75488b606edc..36338e7564a3 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -9,7 +9,6 @@ config XTENSA select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select COMMON_CLK - select DMA_DIRECT_OPS select DMA_REMAP if MMU select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 41c3b1df70eb..ca88b867e7fe 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -35,13 +35,8 @@ config ARCH_HAS_DMA_COHERENT_TO_PFN config ARCH_HAS_DMA_MMAP_PGPROT bool -config DMA_DIRECT_OPS - bool - depends on HAS_DMA - config DMA_NONCOHERENT_CACHE_SYNC bool - depends on DMA_DIRECT_OPS config DMA_VIRT_OPS bool @@ -49,7 +44,6 @@ config DMA_VIRT_OPS config SWIOTLB bool - select DMA_DIRECT_OPS select NEED_DMA_MAP_STATE config DMA_REMAP @@ -58,5 +52,4 @@ config DMA_REMAP config DMA_DIRECT_REMAP bool - depends on DMA_DIRECT_OPS select DMA_REMAP diff --git a/kernel/dma/Makefile b/kernel/dma/Makefile index f4feeceb8020..a626f643cd63 100644 --- a/kernel/dma/Makefile +++ b/kernel/dma/Makefile @@ -1,9 +1,8 @@ # SPDX-License-Identifier: GPL-2.0 -obj-$(CONFIG_HAS_DMA) += mapping.o +obj-$(CONFIG_HAS_DMA) += mapping.o direct.o obj-$(CONFIG_DMA_CMA) += contiguous.o obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += coherent.o -obj-$(CONFIG_DMA_DIRECT_OPS) += direct.o obj-$(CONFIG_DMA_VIRT_OPS) += virt.o obj-$(CONFIG_DMA_API_DEBUG) += debug.o obj-$(CONFIG_SWIOTLB) += swiotlb.o -- cgit v1.2.3-59-g8ed1b From 518a2f1925c3165befbf06b75e07636549d92c1c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 14 Dec 2018 09:00:40 +0100 Subject: dma-mapping: zero memory returned from dma_alloc_* If we want to map memory from the DMA allocator to userspace it must be zeroed at allocation time to prevent stale data leaks. We already do this on most common architectures, but some architectures don't do this yet, fix them up, either by passing GFP_ZERO when we use the normal page allocator or doing a manual memset otherwise. Signed-off-by: Christoph Hellwig Acked-by: Geert Uytterhoeven [m68k] Acked-by: Sam Ravnborg [sparc] --- arch/alpha/kernel/pci_iommu.c | 2 +- arch/arc/mm/dma.c | 2 +- arch/c6x/mm/dma-coherent.c | 5 ++++- arch/m68k/kernel/dma.c | 2 +- arch/microblaze/mm/consistent.c | 2 +- arch/openrisc/kernel/dma.c | 2 +- arch/parisc/kernel/pci-dma.c | 4 ++-- arch/s390/pci/pci_dma.c | 2 +- arch/sparc/kernel/ioport.c | 2 +- arch/sparc/mm/io-unit.c | 2 +- arch/sparc/mm/iommu.c | 2 +- arch/xtensa/kernel/pci-dma.c | 2 +- drivers/misc/mic/host/mic_boot.c | 2 +- kernel/dma/virt.c | 2 +- 14 files changed, 18 insertions(+), 15 deletions(-) (limited to 'arch/xtensa') diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index e1716e0d92fd..aa0f50d0f823 100644 --- a/arch/alpha/kernel/pci_iommu.c +++ b/arch/alpha/kernel/pci_iommu.c @@ -443,7 +443,7 @@ static void *alpha_pci_alloc_coherent(struct device *dev, size_t size, gfp &= ~GFP_DMA; try_again: - cpu_addr = (void *)__get_free_pages(gfp, order); + cpu_addr = (void *)__get_free_pages(gfp | __GFP_ZERO, order); if (! cpu_addr) { printk(KERN_INFO "pci_alloc_consistent: " "get_free_pages failed from %pf\n", diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c index db203ff69ccf..1525ac00fd02 100644 --- a/arch/arc/mm/dma.c +++ b/arch/arc/mm/dma.c @@ -33,7 +33,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, */ BUG_ON(gfp & __GFP_HIGHMEM); - page = alloc_pages(gfp, order); + page = alloc_pages(gfp | __GFP_ZERO, order); if (!page) return NULL; diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c index 01305c787201..75b79571732c 100644 --- a/arch/c6x/mm/dma-coherent.c +++ b/arch/c6x/mm/dma-coherent.c @@ -78,6 +78,7 @@ static void __free_dma_pages(u32 addr, int order) void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp, unsigned long attrs) { + void *ret; u32 paddr; int order; @@ -94,7 +95,9 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, if (!paddr) return NULL; - return phys_to_virt(paddr); + ret = phys_to_virt(paddr); + memset(ret, 0, 1 << order); + return ret; } /* diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c index e99993c57d6b..b4aa853051bd 100644 --- a/arch/m68k/kernel/dma.c +++ b/arch/m68k/kernel/dma.c @@ -32,7 +32,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, size = PAGE_ALIGN(size); order = get_order(size); - page = alloc_pages(flag, order); + page = alloc_pages(flag | __GFP_ZERO, order); if (!page) return NULL; diff --git a/arch/microblaze/mm/consistent.c b/arch/microblaze/mm/consistent.c index 45e0a1aa9357..3002cbca3059 100644 --- a/arch/microblaze/mm/consistent.c +++ b/arch/microblaze/mm/consistent.c @@ -81,7 +81,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, size = PAGE_ALIGN(size); order = get_order(size); - vaddr = __get_free_pages(gfp, order); + vaddr = __get_free_pages(gfp | __GFP_ZERO, order); if (!vaddr) return NULL; diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c index 159336adfa2f..f79457cb3741 100644 --- a/arch/openrisc/kernel/dma.c +++ b/arch/openrisc/kernel/dma.c @@ -89,7 +89,7 @@ arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, .mm = &init_mm }; - page = alloc_pages_exact(size, gfp); + page = alloc_pages_exact(size, gfp | __GFP_ZERO); if (!page) return NULL; diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c index 04c48f1ef3fb..239162355b58 100644 --- a/arch/parisc/kernel/pci-dma.c +++ b/arch/parisc/kernel/pci-dma.c @@ -404,7 +404,7 @@ static void *pcxl_dma_alloc(struct device *dev, size_t size, order = get_order(size); size = 1 << (order + PAGE_SHIFT); vaddr = pcxl_alloc_range(size); - paddr = __get_free_pages(flag, order); + paddr = __get_free_pages(flag | __GFP_ZERO, order); flush_kernel_dcache_range(paddr, size); paddr = __pa(paddr); map_uncached_pages(vaddr, size, paddr); @@ -429,7 +429,7 @@ static void *pcx_dma_alloc(struct device *dev, size_t size, if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0) return NULL; - addr = (void *)__get_free_pages(flag, get_order(size)); + addr = (void *)__get_free_pages(flag | __GFP_ZERO, get_order(size)); if (addr) *dma_handle = (dma_addr_t)virt_to_phys(addr); diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index 346ba382193a..9e52d1527f71 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -404,7 +404,7 @@ static void *s390_dma_alloc(struct device *dev, size_t size, dma_addr_t map; size = PAGE_ALIGN(size); - page = alloc_pages(flag, get_order(size)); + page = alloc_pages(flag | __GFP_ZERO, get_order(size)); if (!page) return NULL; diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c index baa235652c27..f89603855f1e 100644 --- a/arch/sparc/kernel/ioport.c +++ b/arch/sparc/kernel/ioport.c @@ -325,7 +325,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, return NULL; size = PAGE_ALIGN(size); - va = (void *) __get_free_pages(gfp, get_order(size)); + va = (void *) __get_free_pages(gfp | __GFP_ZERO, get_order(size)); if (!va) { printk("%s: no %zd pages\n", __func__, size >> PAGE_SHIFT); return NULL; diff --git a/arch/sparc/mm/io-unit.c b/arch/sparc/mm/io-unit.c index 91be13935d40..f770ee7229d8 100644 --- a/arch/sparc/mm/io-unit.c +++ b/arch/sparc/mm/io-unit.c @@ -224,7 +224,7 @@ static void *iounit_alloc(struct device *dev, size_t len, return NULL; len = PAGE_ALIGN(len); - va = __get_free_pages(gfp, get_order(len)); + va = __get_free_pages(gfp | __GFP_ZERO, get_order(len)); if (!va) return NULL; diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c index fb771a634452..e8d5d73ca40d 100644 --- a/arch/sparc/mm/iommu.c +++ b/arch/sparc/mm/iommu.c @@ -344,7 +344,7 @@ static void *sbus_iommu_alloc(struct device *dev, size_t len, return NULL; len = PAGE_ALIGN(len); - va = __get_free_pages(gfp, get_order(len)); + va = __get_free_pages(gfp | __GFP_ZERO, get_order(len)); if (va == 0) return NULL; diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c index 1fc138b6bc0a..9171bff76fc4 100644 --- a/arch/xtensa/kernel/pci-dma.c +++ b/arch/xtensa/kernel/pci-dma.c @@ -160,7 +160,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, flag & __GFP_NOWARN); if (!page) - page = alloc_pages(flag, get_order(size)); + page = alloc_pages(flag | __GFP_ZERO, get_order(size)); if (!page) return NULL; diff --git a/drivers/misc/mic/host/mic_boot.c b/drivers/misc/mic/host/mic_boot.c index c327985c9523..6479435ac96b 100644 --- a/drivers/misc/mic/host/mic_boot.c +++ b/drivers/misc/mic/host/mic_boot.c @@ -149,7 +149,7 @@ static void *__mic_dma_alloc(struct device *dev, size_t size, struct scif_hw_dev *scdev = dev_get_drvdata(dev); struct mic_device *mdev = scdev_to_mdev(scdev); dma_addr_t tmp; - void *va = kmalloc(size, gfp); + void *va = kmalloc(size, gfp | __GFP_ZERO); if (va) { tmp = mic_map_single(mdev, va, size); diff --git a/kernel/dma/virt.c b/kernel/dma/virt.c index 631ddec4b60a..ebe128833af7 100644 --- a/kernel/dma/virt.c +++ b/kernel/dma/virt.c @@ -13,7 +13,7 @@ static void *dma_virt_alloc(struct device *dev, size_t size, { void *ret; - ret = (void *)__get_free_pages(gfp, get_order(size)); + ret = (void *)__get_free_pages(gfp | __GFP_ZERO, get_order(size)); if (ret) *dma_handle = (uintptr_t)ret; return ret; -- cgit v1.2.3-59-g8ed1b