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Message-ID: <20150514103544.GA7027@gmail.com>
Date: Thu, 14 May 2015 12:35:44 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Josh Triplett <josh@...htriplett.org>,
Borislav Petkov <bp@...en8.de>,
Jonathan Corbet <corbet@....net>,
Peter Zijlstra <peterz@...radead.org>,
Andy Lutomirski <luto@...capital.net>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Linus Torvalds <torvalds@...ux-foundation.org>,
linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
x86@...nel.org, linux-arch@...r.kernel.org
Subject: [PATCH v2] Documentation/arch: Add kernel feature descriptions and
arch support status under Documentation/features/
* Ingo Molnar <mingo@...nel.org> wrote:
> To list an architecture's unsupported features, just do something
> like:
>
> $ git grep -lE 'x86.*TODO' Documentation/features/*/arch-support.txt
>
> Documentation/features/arch-tick-broadcast/arch-support.txt
> Documentation/features/strncasecmp/arch-support.txt
>
> which prints the list of features not yet supported by the
> architecture.
Another way to visualize the feature support status of an
architecture, would be to use the simple script I've put into
Documentation/features/list-arch.sh:
triton:~/tip> Documentation/features/list-arch.sh
#
# Kernel feature support matrix of architecture 'x86':
#
arch-tick-broadcast: | x86: | TODO |
BPF-JIT: | x86: | ok |
clockevents: | x86: | ok |
cmpxchg-local: | x86: | ok |
context-tracking: | x86: | ok |
dma-api-debug: | x86: | ok |
dma-contiguous: | x86: | ok |
dma_map_attrs: | x86: | ok |
ELF-ASLR: | x86: | ok |
gcov-profile-all: | x86: | ok |
generic-idle-thread: | x86: | ok |
huge-vmap: | x86: | ok |
ioremap_prot: | x86: | ok |
irq-time-acct: | x86: | ok |
jump-labels: | x86: | ok |
KASAN: | x86: | ok |
kgdb: | x86: | ok |
kprobes: | x86: | ok |
kprobes-event: | x86: | ok |
kprobes-on-ftrace: | x86: | ok |
kretprobes: | x86: | ok |
lockdep: | x86: | ok |
modern-timekeeping: | x86: | ok |
numa-balancing: | x86: | ok |
numa-memblock: | x86: | ok |
optprobes: | x86: | ok |
perf-regs: | x86: | ok |
perf-stackdump: | x86: | ok |
PG_uncached: | x86: | ok |
pmdp_splitting_flush: | x86: | ok |
pte_special: | x86: | ok |
queued-rwlocks: | x86: | ok |
queued-spinlocks: | x86: | ok |
rwsem-optimized: | x86: | ok |
seccomp-filter: | x86: | ok |
sg-chain: | x86: | ok |
stackprotector: | x86: | ok |
strncasecmp: | x86: | TODO |
THP: | x86: | ok |
tracehook: | x86: | ok |
uprobes: | x86: | ok |
user-ret-profiler: | x86: | ok |
virt-cpuacct: | x86: | ok |
Updated patch attached.
This way we can avoid the conflicts by generating the visualization on
the fly.
Thanks,
Ingo
===============================>
From: Ingo Molnar <mingo@...nel.org>
Date: Thu, 14 May 2015 12:04:00 +0200
Subject: [PATCH] Documentation/arch: Add kernel feature descriptions and arch support status under Documentation/features/
Add arch support matrices for more than 40 generic kernel features
that need per architecture support.
Each feature has its own directory under Documentation/features/feature_name/,
and the arch-support.txt file shows its current arch porting status.
For example, lockdep support is shown the following way:
triton:~/tip> cat Documentation/features/lockdep/arch-support.txt
#
# Feature name: lockdep
# Kconfig: LOCKDEP_SUPPORT
# description: arch supports the runtime locking correctness debug facility
#
-----------------------
| arch |status|
-----------------------
| alpha: | TODO |
| arc: | ok |
| arm: | ok |
| arm64: | ok |
| avr32: | ok |
| blackfin: | ok |
| c6x: | TODO |
| cris: | TODO |
| frv: | TODO |
| hexagon: | ok |
| ia64: | TODO |
| m32r: | TODO |
| m68k: | TODO |
| metag: | ok |
| microblaze: | ok |
| mips: | ok |
| mn10300: | TODO |
| nios2: | TODO |
| openrisc: | TODO |
| parisc: | TODO |
| powerpc: | ok |
| s390: | ok |
| score: | ok |
| sh: | ok |
| sparc: | ok |
| tile: | ok |
| um: | ok |
| unicore32: | ok |
| x86: | ok |
| xtensa: | ok |
-----------------------
For generic kernel features that need architecture support, the
arch-support.txt file in each feature directory shows the arch
support matrix, for all upstream Linux architectures.
The meaning of entries in the tables is:
| ok | # feature supported by the architecture
|TODO| # feature not yet supported by the architecture
| .. | # feature cannot be supported by the hardware
This directory structure can be used in the future to add other
files - such as porting guides, testing description, etc.
The Documentation/features/ hierarchy may also include generic
kernel features that works on every architecture, in that case
the arch-support.txt file will list every architecture as
supported.
To list an architecture's unsupported features, just do something
like:
$ git grep -lE 'x86.*TODO' Documentation/features/*/arch-support.txt
Documentation/features/arch-tick-broadcast/arch-support.txt
Documentation/features/strncasecmp/arch-support.txt
which will print the list of not yet supported features.
The Documentation/features/list-arch.sh script will print the current
support matrix of one architecture:
triton:~/tip> Documentation/features/list-arch.sh
#
# Kernel feature support matrix of architecture 'x86':
#
arch-tick-broadcast: | x86: | TODO |
BPF-JIT: | x86: | ok |
clockevents: | x86: | ok |
cmpxchg-local: | x86: | ok |
context-tracking: | x86: | ok |
dma-api-debug: | x86: | ok |
dma-contiguous: | x86: | ok |
dma_map_attrs: | x86: | ok |
ELF-ASLR: | x86: | ok |
gcov-profile-all: | x86: | ok |
generic-idle-thread: | x86: | ok |
huge-vmap: | x86: | ok |
ioremap_prot: | x86: | ok |
irq-time-acct: | x86: | ok |
jump-labels: | x86: | ok |
KASAN: | x86: | ok |
kgdb: | x86: | ok |
kprobes: | x86: | ok |
kprobes-event: | x86: | ok |
kprobes-on-ftrace: | x86: | ok |
kretprobes: | x86: | ok |
lockdep: | x86: | ok |
modern-timekeeping: | x86: | ok |
numa-balancing: | x86: | ok |
numa-memblock: | x86: | ok |
optprobes: | x86: | ok |
perf-regs: | x86: | ok |
perf-stackdump: | x86: | ok |
PG_uncached: | x86: | ok |
pmdp_splitting_flush: | x86: | ok |
pte_special: | x86: | ok |
queued-rwlocks: | x86: | ok |
queued-spinlocks: | x86: | ok |
rwsem-optimized: | x86: | ok |
seccomp-filter: | x86: | ok |
sg-chain: | x86: | ok |
stackprotector: | x86: | ok |
strncasecmp: | x86: | TODO |
THP: | x86: | ok |
tracehook: | x86: | ok |
uprobes: | x86: | ok |
user-ret-profiler: | x86: | ok |
virt-cpuacct: | x86: | ok |
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
Documentation/features/BPF-JIT/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/ELF-ASLR/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/KASAN/arch-support.txt | 39 ++++++++++++++++++++++
.../features/PG_uncached/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/THP/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/arch-support.txt | 11 ++++++
.../features/arch-tick-broadcast/arch-support.txt | 39 ++++++++++++++++++++++
.../features/clockevents/arch-support.txt | 39 ++++++++++++++++++++++
.../features/cmpxchg-local/arch-support.txt | 39 ++++++++++++++++++++++
.../features/context-tracking/arch-support.txt | 39 ++++++++++++++++++++++
.../features/dma-api-debug/arch-support.txt | 39 ++++++++++++++++++++++
.../features/dma-contiguous/arch-support.txt | 39 ++++++++++++++++++++++
.../features/dma_map_attrs/arch-support.txt | 39 ++++++++++++++++++++++
.../features/gcov-profile-all/arch-support.txt | 39 ++++++++++++++++++++++
.../features/generic-idle-thread/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/huge-vmap/arch-support.txt | 39 ++++++++++++++++++++++
.../features/ioremap_prot/arch-support.txt | 39 ++++++++++++++++++++++
.../features/irq-time-acct/arch-support.txt | 39 ++++++++++++++++++++++
.../features/jump-labels/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/kgdb/arch-support.txt | 39 ++++++++++++++++++++++
.../features/kprobes-event/arch-support.txt | 39 ++++++++++++++++++++++
.../features/kprobes-on-ftrace/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/kprobes/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/kretprobes/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/list-arch.sh | 21 ++++++++++++
Documentation/features/lockdep/arch-support.txt | 39 ++++++++++++++++++++++
.../features/modern-timekeeping/arch-support.txt | 39 ++++++++++++++++++++++
.../features/numa-balancing/arch-support.txt | 39 ++++++++++++++++++++++
.../features/numa-memblock/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/optprobes/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/perf-regs/arch-support.txt | 39 ++++++++++++++++++++++
.../features/perf-stackdump/arch-support.txt | 39 ++++++++++++++++++++++
.../features/pmdp_splitting_flush/arch-support.txt | 39 ++++++++++++++++++++++
.../features/pte_special/arch-support.txt | 39 ++++++++++++++++++++++
.../features/queued-rwlocks/arch-support.txt | 39 ++++++++++++++++++++++
.../features/queued-spinlocks/arch-support.txt | 39 ++++++++++++++++++++++
.../features/rwsem-optimized/arch-support.txt | 39 ++++++++++++++++++++++
.../features/seccomp-filter/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/sg-chain/arch-support.txt | 39 ++++++++++++++++++++++
.../features/stackprotector/arch-support.txt | 39 ++++++++++++++++++++++
.../features/strncasecmp/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/tracehook/arch-support.txt | 39 ++++++++++++++++++++++
Documentation/features/uprobes/arch-support.txt | 39 ++++++++++++++++++++++
.../features/user-ret-profiler/arch-support.txt | 39 ++++++++++++++++++++++
.../features/virt-cpuacct/arch-support.txt | 39 ++++++++++++++++++++++
45 files changed, 1709 insertions(+)
diff --git a/Documentation/features/BPF-JIT/arch-support.txt b/Documentation/features/BPF-JIT/arch-support.txt
new file mode 100644
index 000000000000..e412c18cc87e
--- /dev/null
+++ b/Documentation/features/BPF-JIT/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: BPF-JIT
+# Kconfig: HAVE_BPF_JIT
+# description: arch supports BPF JIT optimizations
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/ELF-ASLR/arch-support.txt b/Documentation/features/ELF-ASLR/arch-support.txt
new file mode 100644
index 000000000000..1b7322b15ca0
--- /dev/null
+++ b/Documentation/features/ELF-ASLR/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: ELF-ASLR
+# Kconfig: ARCH_HAS_ELF_RANDOMIZE
+# description: arch randomizes the stack, heap and binary images of ELF binaries
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/KASAN/arch-support.txt b/Documentation/features/KASAN/arch-support.txt
new file mode 100644
index 000000000000..90d82cbc5f02
--- /dev/null
+++ b/Documentation/features/KASAN/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: KASAN
+# Kconfig: HAVE_ARCH_KASAN
+# description: arch supports the KASAN runtime memory checker
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/PG_uncached/arch-support.txt b/Documentation/features/PG_uncached/arch-support.txt
new file mode 100644
index 000000000000..a3a0ecf49788
--- /dev/null
+++ b/Documentation/features/PG_uncached/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: PG_uncached
+# Kconfig: ARCH_USES_PG_UNCACHED
+# description: arch supports the PG_uncached page flag
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/THP/arch-support.txt b/Documentation/features/THP/arch-support.txt
new file mode 100644
index 000000000000..88da2621216b
--- /dev/null
+++ b/Documentation/features/THP/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: THP
+# Kconfig: HAVE_ARCH_TRANSPARENT_HUGEPAGE && 64BIT
+# description: arch supports transparent hugepages
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | .. |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | .. |
+ | blackfin: | .. |
+ | c6x: | .. |
+ | cris: | .. |
+ | frv: | .. |
+ | hexagon: | .. |
+ | ia64: | TODO |
+ | m32r: | .. |
+ | m68k: | .. |
+ | metag: | .. |
+ | microblaze: | .. |
+ | mips: | ok |
+ | mn10300: | .. |
+ | nios2: | .. |
+ | openrisc: | .. |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | .. |
+ | sh: | .. |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | .. |
+ | unicore32: | .. |
+ | x86: | ok |
+ | xtensa: | .. |
+ -----------------------
diff --git a/Documentation/features/arch-support.txt b/Documentation/features/arch-support.txt
new file mode 100644
index 000000000000..d22a1095e661
--- /dev/null
+++ b/Documentation/features/arch-support.txt
@@ -0,0 +1,11 @@
+
+For generic kernel features that need architecture support, the
+arch-support.txt file in each feature directory shows the arch
+support matrix, for all upstream Linux architectures.
+
+The meaning of entries in the tables is:
+
+ | ok | # feature supported by the architecture
+ |TODO| # feature not yet supported by the architecture
+ | .. | # feature cannot be supported by the hardware
+
diff --git a/Documentation/features/arch-tick-broadcast/arch-support.txt b/Documentation/features/arch-tick-broadcast/arch-support.txt
new file mode 100644
index 000000000000..d6798417428b
--- /dev/null
+++ b/Documentation/features/arch-tick-broadcast/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: arch-tick-broadcast
+# Kconfig: ARCH_HAS_TICK_BROADCAST
+# description: arch provides tick_broadcast()
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | TODO |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/clockevents/arch-support.txt b/Documentation/features/clockevents/arch-support.txt
new file mode 100644
index 000000000000..8ba7fb83825b
--- /dev/null
+++ b/Documentation/features/clockevents/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: clockevents
+# Kconfig: GENERIC_CLOCKEVENTS
+# description: arch support generic clock events
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | ok |
+ | blackfin: | ok |
+ | c6x: | ok |
+ | cris: | ok |
+ | frv: | TODO |
+ | hexagon: | ok |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | ok |
+ | metag: | ok |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | ok |
+ | nios2: | ok |
+ | openrisc: | ok |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | ok |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | ok |
+ | unicore32: | ok |
+ | x86: | ok |
+ | xtensa: | ok |
+ -----------------------
diff --git a/Documentation/features/cmpxchg-local/arch-support.txt b/Documentation/features/cmpxchg-local/arch-support.txt
new file mode 100644
index 000000000000..364482dc1340
--- /dev/null
+++ b/Documentation/features/cmpxchg-local/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: cmpxchg-local
+# Kconfig: HAVE_CMPXCHG_LOCAL
+# description: arch supports the this_cpu_cmpxchg() API
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/context-tracking/arch-support.txt b/Documentation/features/context-tracking/arch-support.txt
new file mode 100644
index 000000000000..47a15d997694
--- /dev/null
+++ b/Documentation/features/context-tracking/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: context-tracking
+# Kconfig: HAVE_CONTEXT_TRACKING
+# description: arch supports context tracking for NO_HZ_FULL
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/dma-api-debug/arch-support.txt b/Documentation/features/dma-api-debug/arch-support.txt
new file mode 100644
index 000000000000..cfd6bcf41b8a
--- /dev/null
+++ b/Documentation/features/dma-api-debug/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: dma-api-debug
+# Kconfig: HAVE_DMA_API_DEBUG
+# description: arch supports DMA debug facilities
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | ok |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/dma-contiguous/arch-support.txt b/Documentation/features/dma-contiguous/arch-support.txt
new file mode 100644
index 000000000000..a775a06ed2af
--- /dev/null
+++ b/Documentation/features/dma-contiguous/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: dma-contiguous
+# Kconfig: HAVE_DMA_CONTIGUOUS
+# description: arch supports the DMA CMA (continuous memory allocator)
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/dma_map_attrs/arch-support.txt b/Documentation/features/dma_map_attrs/arch-support.txt
new file mode 100644
index 000000000000..c6296a6354ac
--- /dev/null
+++ b/Documentation/features/dma_map_attrs/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: dma_map_attrs
+# Kconfig: HAVE_DMA_ATTRS
+# description: arch provides dma_*map*_attrs() APIs
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | ok |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | ok |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | ok |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/gcov-profile-all/arch-support.txt b/Documentation/features/gcov-profile-all/arch-support.txt
new file mode 100644
index 000000000000..27961d93b4f7
--- /dev/null
+++ b/Documentation/features/gcov-profile-all/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: gcov-profile-all
+# Kconfig: ARCH_HAS_GCOV_PROFILE_ALL
+# description: arch supports whole-kernel GCOV code coverage profiling
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | ok |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/generic-idle-thread/arch-support.txt b/Documentation/features/generic-idle-thread/arch-support.txt
new file mode 100644
index 000000000000..30315627905d
--- /dev/null
+++ b/Documentation/features/generic-idle-thread/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: generic-idle-thread
+# Kconfig: GENERIC_SMP_IDLE_THREAD
+# description: arch makes use of the generic SMP idle thread facility
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | ok |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | ok |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | ok |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | ok |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | ok |
+ -----------------------
diff --git a/Documentation/features/huge-vmap/arch-support.txt b/Documentation/features/huge-vmap/arch-support.txt
new file mode 100644
index 000000000000..8784e30b1734
--- /dev/null
+++ b/Documentation/features/huge-vmap/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: huge-vmap
+# Kconfig: HAVE_ARCH_HUGE_VMAP
+# description: arch supports the ioremap_pud_enabled() and ioremap_pmd_enabled() VM APIs
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/ioremap_prot/arch-support.txt b/Documentation/features/ioremap_prot/arch-support.txt
new file mode 100644
index 000000000000..2094b77d924b
--- /dev/null
+++ b/Documentation/features/ioremap_prot/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: ioremap_prot
+# Kconfig: HAVE_IOREMAP_PROT
+# description: arch has ioremap_prot()
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | ok |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | TODO |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/irq-time-acct/arch-support.txt b/Documentation/features/irq-time-acct/arch-support.txt
new file mode 100644
index 000000000000..15a85ecb7700
--- /dev/null
+++ b/Documentation/features/irq-time-acct/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: irq-time-acct
+# Kconfig: HAVE_IRQ_TIME_ACCOUNTING
+# description: arch supports precise IRQ time accounting
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | ok |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | ok |
+ -----------------------
diff --git a/Documentation/features/jump-labels/arch-support.txt b/Documentation/features/jump-labels/arch-support.txt
new file mode 100644
index 000000000000..f1c1c72653d6
--- /dev/null
+++ b/Documentation/features/jump-labels/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: jump-labels
+# Kconfig: HAVE_ARCH_JUMP_LABEL
+# description: arch supports live patched high efficiency branches
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/kgdb/arch-support.txt b/Documentation/features/kgdb/arch-support.txt
new file mode 100644
index 000000000000..f384b75f1251
--- /dev/null
+++ b/Documentation/features/kgdb/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: kgdb
+# Kconfig: HAVE_ARCH_KGDB
+# description: arch supports the kGDB kernel debugger
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | ok |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | ok |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | ok |
+ | nios2: | ok |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/kprobes-event/arch-support.txt b/Documentation/features/kprobes-event/arch-support.txt
new file mode 100644
index 000000000000..f8cf1d54d100
--- /dev/null
+++ b/Documentation/features/kprobes-event/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: kprobes-event
+# Kconfig: HAVE_REGS_AND_STACK_ACCESS_API
+# description: arch supports kprobes with perf events
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | ok |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | TODO |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/kprobes-on-ftrace/arch-support.txt b/Documentation/features/kprobes-on-ftrace/arch-support.txt
new file mode 100644
index 000000000000..0f4a8c8df472
--- /dev/null
+++ b/Documentation/features/kprobes-on-ftrace/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: kprobes-on-ftrace
+# Kconfig: HAVE_KPROBES_ON_FTRACE
+# description: arch supports combined kprobes and ftrace live patching
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/kprobes/arch-support.txt b/Documentation/features/kprobes/arch-support.txt
new file mode 100644
index 000000000000..d5518f7fc567
--- /dev/null
+++ b/Documentation/features/kprobes/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: kprobes
+# Kconfig: HAVE_KPROBES
+# description: arch supports live patched kernel probe
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | TODO |
+ | avr32: | ok |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/kretprobes/arch-support.txt b/Documentation/features/kretprobes/arch-support.txt
new file mode 100644
index 000000000000..13960c4cbe61
--- /dev/null
+++ b/Documentation/features/kretprobes/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: kretprobes
+# Kconfig: HAVE_KRETPROBES
+# description: arch supports kernel function-return probes
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/list-arch.sh b/Documentation/features/list-arch.sh
new file mode 100755
index 000000000000..aa53da231a26
--- /dev/null
+++ b/Documentation/features/list-arch.sh
@@ -0,0 +1,21 @@
+#
+# Small script that visualizes the kernel feature support status
+# of an architecture.
+#
+# (If no arguments are given then it will print the host architecture's status.)
+#
+
+[ $# = 0 ] && ARCH=$(arch | sed 's/x86_64/x86/' | sed 's/i386/x86/')
+
+cd $(dirname $0)
+echo "#"
+echo "# Kernel feature support matrix of architecture '$ARCH':"
+echo "#"
+
+for F in */arch-support.txt; do
+ N=$(git grep -h "Feature name" $F | cut -d: -f2)
+ S=$(git grep -hw $ARCH $F)
+
+ printf "%30s: %s\n" "$N" "$S"
+done
+
diff --git a/Documentation/features/lockdep/arch-support.txt b/Documentation/features/lockdep/arch-support.txt
new file mode 100644
index 000000000000..5bfbb7d64fe0
--- /dev/null
+++ b/Documentation/features/lockdep/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: lockdep
+# Kconfig: LOCKDEP_SUPPORT
+# description: arch supports the runtime locking correctness debug facility
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | ok |
+ | blackfin: | ok |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | ok |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | ok |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | ok |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | ok |
+ | unicore32: | ok |
+ | x86: | ok |
+ | xtensa: | ok |
+ -----------------------
diff --git a/Documentation/features/modern-timekeeping/arch-support.txt b/Documentation/features/modern-timekeeping/arch-support.txt
new file mode 100644
index 000000000000..14422649183d
--- /dev/null
+++ b/Documentation/features/modern-timekeeping/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: modern-timekeeping
+# Kconfig: !ARCH_USES_GETTIMEOFFSET
+# description: arch does not use arch_gettimeoffset() anymore
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | ok |
+ | arm: | TODO |
+ | arm64: | ok |
+ | avr32: | ok |
+ | blackfin: | TODO |
+ | c6x: | ok |
+ | cris: | TODO |
+ | frv: | ok |
+ | hexagon: | ok |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | ok |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | ok |
+ | nios2: | ok |
+ | openrisc: | ok |
+ | parisc: | ok |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | ok |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | ok |
+ | unicore32: | ok |
+ | x86: | ok |
+ | xtensa: | ok |
+ -----------------------
diff --git a/Documentation/features/numa-balancing/arch-support.txt b/Documentation/features/numa-balancing/arch-support.txt
new file mode 100644
index 000000000000..791ceb82b16a
--- /dev/null
+++ b/Documentation/features/numa-balancing/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: numa-balancing
+# Kconfig: ARCH_SUPPORTS_NUMA_BALANCING && 64BIT && NUMA
+# description: arch supports NUMA balancing
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | .. |
+ | arm: | .. |
+ | arm64: | .. |
+ | avr32: | .. |
+ | blackfin: | .. |
+ | c6x: | .. |
+ | cris: | .. |
+ | frv: | .. |
+ | hexagon: | .. |
+ | ia64: | TODO |
+ | m32r: | .. |
+ | m68k: | .. |
+ | metag: | .. |
+ | microblaze: | .. |
+ | mips: | TODO |
+ | mn10300: | .. |
+ | nios2: | .. |
+ | openrisc: | .. |
+ | parisc: | .. |
+ | powerpc: | ok |
+ | s390: | .. |
+ | score: | .. |
+ | sh: | .. |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | .. |
+ | unicore32: | .. |
+ | x86: | ok |
+ | xtensa: | .. |
+ -----------------------
diff --git a/Documentation/features/numa-memblock/arch-support.txt b/Documentation/features/numa-memblock/arch-support.txt
new file mode 100644
index 000000000000..477df392fee1
--- /dev/null
+++ b/Documentation/features/numa-memblock/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: numa-memblock
+# Kconfig: HAVE_MEMBLOCK_NODE_MAP
+# description: arch supports NUMA aware memblocks
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | .. |
+ | arm: | .. |
+ | arm64: | .. |
+ | avr32: | .. |
+ | blackfin: | .. |
+ | c6x: | .. |
+ | cris: | .. |
+ | frv: | .. |
+ | hexagon: | .. |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | .. |
+ | metag: | ok |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | .. |
+ | openrisc: | .. |
+ | parisc: | .. |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | ok |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | .. |
+ | unicore32: | .. |
+ | x86: | ok |
+ | xtensa: | .. |
+ -----------------------
diff --git a/Documentation/features/optprobes/arch-support.txt b/Documentation/features/optprobes/arch-support.txt
new file mode 100644
index 000000000000..33907b6f5775
--- /dev/null
+++ b/Documentation/features/optprobes/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: optprobes
+# Kconfig: HAVE_OPTPROBES
+# description: arch supports live patched optprobes
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/perf-regs/arch-support.txt b/Documentation/features/perf-regs/arch-support.txt
new file mode 100644
index 000000000000..c820ebab4328
--- /dev/null
+++ b/Documentation/features/perf-regs/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: perf-regs
+# Kconfig: HAVE_PERF_REGS
+# description: arch supports perf events register access
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/perf-stackdump/arch-support.txt b/Documentation/features/perf-stackdump/arch-support.txt
new file mode 100644
index 000000000000..cf42a6fab4e2
--- /dev/null
+++ b/Documentation/features/perf-stackdump/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: perf-stackdump
+# Kconfig: HAVE_PERF_USER_STACK_DUMP
+# description: arch supports perf events stack dumps
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/pmdp_splitting_flush/arch-support.txt b/Documentation/features/pmdp_splitting_flush/arch-support.txt
new file mode 100644
index 000000000000..930c6f0095e7
--- /dev/null
+++ b/Documentation/features/pmdp_splitting_flush/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: pmdp_splitting_flush
+# Kconfig: #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
+# description: arch supports the pmdp_splitting_flush() VM API
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/pte_special/arch-support.txt b/Documentation/features/pte_special/arch-support.txt
new file mode 100644
index 000000000000..0ca26d144c04
--- /dev/null
+++ b/Documentation/features/pte_special/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: pte_special
+# Kconfig: #define __HAVE_ARCH_PTE_SPECIAL
+# description: arch supports the pte_special()/pte_mkspecial() VM APIs
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/queued-rwlocks/arch-support.txt b/Documentation/features/queued-rwlocks/arch-support.txt
new file mode 100644
index 000000000000..abaffd1b3b84
--- /dev/null
+++ b/Documentation/features/queued-rwlocks/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: queued-rwlocks
+# Kconfig: ARCH_USE_QUEUED_RWLOCKS
+# description: arch supports queued rwlocks
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/queued-spinlocks/arch-support.txt b/Documentation/features/queued-spinlocks/arch-support.txt
new file mode 100644
index 000000000000..480e9e657039
--- /dev/null
+++ b/Documentation/features/queued-spinlocks/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: queued-spinlocks
+# Kconfig: ARCH_USE_QUEUED_SPINLOCKS
+# description: arch supports queued spinlocks
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/rwsem-optimized/arch-support.txt b/Documentation/features/rwsem-optimized/arch-support.txt
new file mode 100644
index 000000000000..1572c7a75bb0
--- /dev/null
+++ b/Documentation/features/rwsem-optimized/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: rwsem-optimized
+# Kconfig: Optimized asm/rwsem.h
+# description: arch provides optimized rwsem APIs
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | ok |
+ | blackfin: | ok |
+ | c6x: | ok |
+ | cris: | ok |
+ | frv: | ok |
+ | hexagon: | ok |
+ | ia64: | ok |
+ | m32r: | ok |
+ | m68k: | ok |
+ | metag: | ok |
+ | microblaze: | ok |
+ | mips: | ok |
+ | mn10300: | ok |
+ | nios2: | ok |
+ | openrisc: | ok |
+ | parisc: | ok |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | ok |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | ok |
+ | unicore32: | ok |
+ | x86: | ok |
+ | xtensa: | ok |
+ -----------------------
diff --git a/Documentation/features/seccomp-filter/arch-support.txt b/Documentation/features/seccomp-filter/arch-support.txt
new file mode 100644
index 000000000000..1d242a40f195
--- /dev/null
+++ b/Documentation/features/seccomp-filter/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: seccomp-filter
+# Kconfig: HAVE_ARCH_SECCOMP_FILTER
+# description: arch supports seccomp filters
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/sg-chain/arch-support.txt b/Documentation/features/sg-chain/arch-support.txt
new file mode 100644
index 000000000000..8aff17488ae0
--- /dev/null
+++ b/Documentation/features/sg-chain/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: sg-chain
+# Kconfig: ARCH_HAS_SG_CHAIN
+# description: arch supports chained scatter-gather lists
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | ok |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/stackprotector/arch-support.txt b/Documentation/features/stackprotector/arch-support.txt
new file mode 100644
index 000000000000..543b41d36520
--- /dev/null
+++ b/Documentation/features/stackprotector/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: stackprotector
+# Kconfig: HAVE_CC_STACKPROTECTOR
+# description: arch supports compiler driven stack overflow protection
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/strncasecmp/arch-support.txt b/Documentation/features/strncasecmp/arch-support.txt
new file mode 100644
index 000000000000..9ea6e4d4baed
--- /dev/null
+++ b/Documentation/features/strncasecmp/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: strncasecmp
+# Kconfig: __HAVE_ARCH_STRNCASECMP
+# description: arch provides an optimized strncasecmp() function
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | TODO |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/tracehook/arch-support.txt b/Documentation/features/tracehook/arch-support.txt
new file mode 100644
index 000000000000..05e9de795733
--- /dev/null
+++ b/Documentation/features/tracehook/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: tracehook
+# Kconfig: HAVE_ARCH_TRACEHOOK
+# description: arch supports tracehook (ptrace) register handling APIs
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | ok |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | ok |
+ | c6x: | ok |
+ | cris: | TODO |
+ | frv: | ok |
+ | hexagon: | ok |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | ok |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | ok |
+ | nios2: | ok |
+ | openrisc: | ok |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | ok |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/uprobes/arch-support.txt b/Documentation/features/uprobes/arch-support.txt
new file mode 100644
index 000000000000..7c633b846f65
--- /dev/null
+++ b/Documentation/features/uprobes/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: uprobes
+# Kconfig: ARCH_SUPPORTS_UPROBES
+# description: arch supports live patched user probes
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | TODO |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/user-ret-profiler/arch-support.txt b/Documentation/features/user-ret-profiler/arch-support.txt
new file mode 100644
index 000000000000..6ba4d07ff641
--- /dev/null
+++ b/Documentation/features/user-ret-profiler/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: user-ret-profiler
+# Kconfig: HAVE_USER_RETURN_NOTIFIER
+# description: arch supports user-space return from system call profiler
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | TODO |
+ | arc: | TODO |
+ | arm: | TODO |
+ | arm64: | TODO |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | TODO |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | TODO |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | TODO |
+ | powerpc: | TODO |
+ | s390: | TODO |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | TODO |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
diff --git a/Documentation/features/virt-cpuacct/arch-support.txt b/Documentation/features/virt-cpuacct/arch-support.txt
new file mode 100644
index 000000000000..c9374d33b8ac
--- /dev/null
+++ b/Documentation/features/virt-cpuacct/arch-support.txt
@@ -0,0 +1,39 @@
+#
+# Feature name: virt-cpuacct
+# Kconfig: HAVE_VIRT_CPU_ACCOUNTING || 64BIT
+# description: arch supports precise virtual CPU time accounting
+#
+ -----------------------
+ | arch |status|
+ -----------------------
+ | alpha: | ok |
+ | arc: | TODO |
+ | arm: | ok |
+ | arm64: | ok |
+ | avr32: | TODO |
+ | blackfin: | TODO |
+ | c6x: | TODO |
+ | cris: | TODO |
+ | frv: | TODO |
+ | hexagon: | TODO |
+ | ia64: | ok |
+ | m32r: | TODO |
+ | m68k: | TODO |
+ | metag: | TODO |
+ | microblaze: | TODO |
+ | mips: | ok |
+ | mn10300: | TODO |
+ | nios2: | TODO |
+ | openrisc: | TODO |
+ | parisc: | ok |
+ | powerpc: | ok |
+ | s390: | ok |
+ | score: | TODO |
+ | sh: | TODO |
+ | sparc: | ok |
+ | tile: | ok |
+ | um: | TODO |
+ | unicore32: | TODO |
+ | x86: | ok |
+ | xtensa: | TODO |
+ -----------------------
--
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