The patch titled
Subject: mm: generalize ZONE_[DMA|DMA32]
has been added to the -mm tree. Its filename is
mm-generalize-zone_.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-generalize-zone_.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-generalize-zone_.patch
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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm: generalize ZONE_[DMA|DMA32]
ZONE_[DMA|DMA32] configs have duplicate definitions on platforms that
subscribe to them. Instead, just make them generic options which can be
selected on applicable platforms.
Also only x86/arm64 architectures could enable both ZONE_DMA and
ZONE_DMA32 if EXPERT, add ARCH_HAS_ZONE_DMA_SET to make dma zone
configurable and visible on the two architectures.
Link: https://lkml.kernel.org/r/20210528074557.17768-1-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> [arm64]
Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> [m68k]
Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx> [RISC-V]
Acked-by: Michal Simek <michal.simek@xxxxxxxxxx> [microblaze]
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/alpha/Kconfig | 5 +----
arch/arm/Kconfig | 3 ---
arch/arm64/Kconfig | 9 +--------
arch/ia64/Kconfig | 4 +---
arch/m68k/Kconfig | 5 +----
arch/microblaze/Kconfig | 4 +---
arch/mips/Kconfig | 7 -------
arch/powerpc/Kconfig | 4 ----
arch/powerpc/platforms/Kconfig.cputype | 1 +
arch/riscv/Kconfig | 5 +----
arch/s390/Kconfig | 4 +---
arch/sparc/Kconfig | 5 +----
arch/x86/Kconfig | 15 ++-------------
mm/Kconfig | 12 ++++++++++++
14 files changed, 23 insertions(+), 60 deletions(-)
--- a/arch/alpha/Kconfig~mm-generalize-zone_
+++ a/arch/alpha/Kconfig
@@ -40,6 +40,7 @@ config ALPHA
select MMU_GATHER_NO_RANGE
select SET_FS
select SPARSEMEM_EXTREME if SPARSEMEM
+ select ZONE_DMA
help
The Alpha is a 64-bit general-purpose processor designed and
marketed by the Digital Equipment Corporation of blessed memory,
@@ -65,10 +66,6 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
-config ZONE_DMA
- bool
- default y
-
config GENERIC_ISA_DMA
bool
default y
--- a/arch/arm64/Kconfig~mm-generalize-zone_
+++ a/arch/arm64/Kconfig
@@ -42,6 +42,7 @@ config ARM64
select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_TEARDOWN_DMA_OPS if IOMMU_SUPPORT
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+ select ARCH_HAS_ZONE_DMA_SET if EXPERT
select ARCH_HAVE_ELF_PROT
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_INLINE_READ_LOCK if !PREEMPTION
@@ -307,14 +308,6 @@ config GENERIC_CSUM
config GENERIC_CALIBRATE_DELAY
def_bool y
-config ZONE_DMA
- bool "Support DMA zone" if EXPERT
- default y
-
-config ZONE_DMA32
- bool "Support DMA32 zone" if EXPERT
- default y
-
config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
def_bool y
--- a/arch/arm/Kconfig~mm-generalize-zone_
+++ a/arch/arm/Kconfig
@@ -218,9 +218,6 @@ config GENERIC_CALIBRATE_DELAY
config ARCH_MAY_HAVE_PC_FDC
bool
-config ZONE_DMA
- bool
-
config ARCH_SUPPORTS_UPROBES
def_bool y
--- a/arch/ia64/Kconfig~mm-generalize-zone_
+++ a/arch/ia64/Kconfig
@@ -60,6 +60,7 @@ config IA64
select NUMA if !FLATMEM
select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
select SET_FS
+ select ZONE_DMA32
default y
help
The Itanium Processor Family is Intel's 64-bit successor to
@@ -72,9 +73,6 @@ config 64BIT
select ATA_NONSTANDARD if ATA
default y
-config ZONE_DMA32
- def_bool y
-
config MMU
bool
default y
--- a/arch/m68k/Kconfig~mm-generalize-zone_
+++ a/arch/m68k/Kconfig
@@ -34,6 +34,7 @@ config M68K
select SET_FS
select UACCESS_MEMCPY if !MMU
select VIRT_TO_BUS
+ select ZONE_DMA
config CPU_BIG_ENDIAN
def_bool y
@@ -62,10 +63,6 @@ config TIME_LOW_RES
config NO_IOPORT_MAP
def_bool y
-config ZONE_DMA
- bool
- default y
-
config HZ
int
default 1000 if CLEOPATRA
--- a/arch/microblaze/Kconfig~mm-generalize-zone_
+++ a/arch/microblaze/Kconfig
@@ -43,6 +43,7 @@ config MICROBLAZE
select MMU_GATHER_NO_RANGE
select SPARSE_IRQ
select SET_FS
+ select ZONE_DMA
# Endianness selection
choice
@@ -60,9 +61,6 @@ config CPU_LITTLE_ENDIAN
endchoice
-config ZONE_DMA
- def_bool y
-
config ARCH_HAS_ILOG2_U32
def_bool n
--- a/arch/mips/Kconfig~mm-generalize-zone_
+++ a/arch/mips/Kconfig
@@ -3274,13 +3274,6 @@ config I8253
select CLKSRC_I8253
select CLKEVT_I8253
select MIPS_EXTERNAL_TIMER
-
-config ZONE_DMA
- bool
-
-config ZONE_DMA32
- bool
-
endmenu
config TRAD_SIGNALS
--- a/arch/powerpc/Kconfig~mm-generalize-zone_
+++ a/arch/powerpc/Kconfig
@@ -403,10 +403,6 @@ config PPC_ADV_DEBUG_DAC_RANGE
config PPC_DAWR
bool
-config ZONE_DMA
- bool
- default y if PPC_BOOK3E_64
-
config PGTABLE_LEVELS
int
default 2 if !PPC64
--- a/arch/powerpc/platforms/Kconfig.cputype~mm-generalize-zone_
+++ a/arch/powerpc/platforms/Kconfig.cputype
@@ -113,6 +113,7 @@ config PPC_BOOK3E_64
select PPC_FPU # Make it a choice ?
select PPC_SMP_MUXED_IPI
select PPC_DOORBELL
+ select ZONE_DMA
endchoice
--- a/arch/riscv/Kconfig~mm-generalize-zone_
+++ a/arch/riscv/Kconfig
@@ -104,6 +104,7 @@ config RISCV
select SYSCTL_EXCEPTION_TRACE
select THREAD_INFO_IN_TASK
select UACCESS_MEMCPY if !MMU
+ select ZONE_DMA32 if 64BIT
config ARCH_MMAP_RND_BITS_MIN
default 18 if 64BIT
@@ -133,10 +134,6 @@ config MMU
Select if you want MMU-based virtualised addressing space
support by paged memory management. If unsure, say 'Y'.
-config ZONE_DMA32
- bool
- default y if 64BIT
-
config VA_BITS
int
default 32 if 32BIT
--- a/arch/s390/Kconfig~mm-generalize-zone_
+++ a/arch/s390/Kconfig
@@ -2,9 +2,6 @@
config MMU
def_bool y
-config ZONE_DMA
- def_bool y
-
config CPU_BIG_ENDIAN
def_bool y
@@ -210,6 +207,7 @@ config S390
select THREAD_INFO_IN_TASK
select TTY
select VIRT_CPU_ACCOUNTING
+ select ZONE_DMA
# Note: keep the above list sorted alphabetically
config SCHED_OMIT_FRAME_POINTER
--- a/arch/sparc/Kconfig~mm-generalize-zone_
+++ a/arch/sparc/Kconfig
@@ -59,6 +59,7 @@ config SPARC32
select CLZ_TAB
select HAVE_UID16
select OLD_SIGACTION
+ select ZONE_DMA
config SPARC64
def_bool 64BIT
@@ -141,10 +142,6 @@ config HIGHMEM
default y if SPARC32
select KMAP_LOCAL
-config ZONE_DMA
- bool
- default y if SPARC32
-
config GENERIC_ISA_DMA
bool
default y if SPARC32
--- a/arch/x86/Kconfig~mm-generalize-zone_
+++ a/arch/x86/Kconfig
@@ -33,6 +33,7 @@ config X86_64
select NEED_DMA_MAP_STATE
select SWIOTLB
select ARCH_HAS_ELFCORE_COMPAT
+ select ZONE_DMA32
config FORCE_DYNAMIC_FTRACE
def_bool y
@@ -93,6 +94,7 @@ config X86
select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAS_DEBUG_WX
+ select ARCH_HAS_ZONE_DMA_SET if EXPERT
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select ARCH_MIGHT_HAVE_PC_PARPORT
@@ -343,9 +345,6 @@ config ARCH_SUSPEND_POSSIBLE
config ARCH_WANT_GENERAL_HUGETLB
def_bool y
-config ZONE_DMA32
- def_bool y if X86_64
-
config AUDIT_ARCH
def_bool y if X86_64
@@ -393,16 +392,6 @@ config CC_HAS_SANE_STACKPROTECTOR
menu "Processor type and features"
-config ZONE_DMA
- bool "DMA memory allocation support" if EXPERT
- default y
- help
- DMA memory allocation support allows devices with less than 32-bit
- addressing to allocate within the first 16MB of address space.
- Disable if no such devices will be used.
-
- If unsure, say Y.
-
config SMP
bool "Symmetric multi-processing support"
help
--- a/mm/Kconfig~mm-generalize-zone_
+++ a/mm/Kconfig
@@ -792,6 +792,18 @@ config ARCH_HAS_CACHE_LINE_SIZE
config ARCH_HAS_PTE_DEVMAP
bool
+config ARCH_HAS_ZONE_DMA_SET
+ bool
+
+config ZONE_DMA
+ bool "Support DMA zone" if ARCH_HAS_ZONE_DMA_SET
+ default y if ARM64 || X86
+
+config ZONE_DMA32
+ bool "Support DMA32 zone" if ARCH_HAS_ZONE_DMA_SET
+ depends on !X86_32
+ default y if ARM64
+
config ZONE_DEVICE
bool "Device memory (pmem, HMM, etc...) hotplug support"
depends on MEMORY_HOTPLUG
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
mm-page-writeback-kill-get_writeback_state-comments.patch
mm-move-holes_in_zone-into-mm.patch
mm-generalize-zone_.patch
