Merge branches 'sh/earlytimer' and 'sh/shmobile-r2r-staging'

      be probed later if another device registers.  (Which is OK, since

      this interface is only for use with non-hotpluggable devices.)

Early Platform Devices and Drivers

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The early platform interfaces provide platform data to platform device

drivers early on during the system boot. The code is built on top of the

early_param() command line parsing and can be executed very early on.

Example: "earlyprintk" class early serial console in 6 steps

1. Registering early platform device data

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The architecture code registers platform device data using the function

early_platform_add_devices(). In the case of early serial console this

should be hardware configuration for the serial port. Devices registered

at this point will later on be matched against early platform drivers.

2. Parsing kernel command line

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The architecture code calls parse_early_param() to parse the kernel

command line. This will execute all matching early_param() callbacks.

User specified early platform devices will be registered at this point.

For the early serial console case the user can specify port on the

kernel command line as "earlyprintk=serial.0" where "earlyprintk" is

the class string, "serial" is the name of the platfrom driver and

0 is the platform device id. If the id is -1 then the dot and the

id can be omitted.

3. Installing early platform drivers belonging to a certain class

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The architecture code may optionally force registration of all early

platform drivers belonging to a certain class using the function

early_platform_driver_register_all(). User specified devices from

step 2 have priority over these. This step is omitted by the serial

driver example since the early serial driver code should be disabled

unless the user has specified port on the kernel command line.

4. Early platform driver registration

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Compiled-in platform drivers making use of early_platform_init() are

automatically registered during step 2 or 3. The serial driver example

should use early_platform_init("earlyprintk", &platform_driver).

5. Probing of early platform drivers belonging to a certain class

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The architecture code calls early_platform_driver_probe() to match

registered early platform devices associated with a certain class with

registered early platform drivers. Matched devices will get probed().

This step can be executed at any point during the early boot. As soon

as possible may be good for the serial port case.

6. Inside the early platform driver probe()

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The driver code needs to take special care during early boot, especially

when it comes to memory allocation and interrupt registration. The code

in the probe() function can use is_early_platform_device() to check if

it is called at early platform device or at the regular platform device

time. The early serial driver performs register_console() at this point.

For further information, see <linux/platform_device.h>.

data transfers.

POHMELFS clients operate with a working set of servers and are capable of balancing read-only

operations (like lookups or directory listings) between them.

operations (like lookups or directory listings) between them according to IO priorities.

Administrators can add or remove servers from the set at run-time via special commands (described

in Documentation/pohmelfs/info.txt file). Writes are replicated to all servers.

in Documentation/pohmelfs/info.txt file). Writes are replicated to all servers, which are connected

with write permission turned on. IO priority and permissions can be changed in run-time.

POHMELFS is capable of full data channel encryption and/or strong crypto hashing.

One can select any kernel supported cipher, encryption mode, hash type and operation mode

POHMELFS usage information.

Mount options:

Mount options.

All but index, number of crypto threads and maximum IO size can changed via remount.

idx=%u

 Each mountpoint is associated with a special index via this option.

 Administrator can add or remove servers from the given index, so all mounts,

Usage examples.

Add (or remove if it already exists) server server1.net:1025 into the working set with index $idx

Add server server1.net:1025 into the working set with index $idx

with appropriate hash algorithm and key file and cipher algorithm, mode and key file:

$cfg -a server1.net -p 1025 -i $idx -K $hash_key -k $cipher_key

$cfg A add -a server1.net -p 1025 -i $idx -K $hash_key -k $cipher_key

Mount filesystem with given index $idx to /mnt mountpoint.

Client will connect to all servers specified in the working set via previous command:

mount -t pohmel -o idx=$idx q /mnt

One can add or remove servers from working set after mounting too.

Change permissions to read-only (-I 1 option, '-I 2' - write-only, 3 - rw):

$cfg A modify -a server1.net -p 1025 -i $idx -I 1

Change IO priority to 123 (node with the highest priority gets read requests).

$cfg A modify -a server1.net -p 1025 -i $idx -P 123

One can check currect status of all connections in the mountstats file:

# cat /proc/$PID/mountstats

...

device none mounted on /mnt with fstype pohmel

idx addr(:port) socket_type protocol active priority permissions

0 server1.net:1026 1 6 1 250 1

0 server2.net:1025 1 6 1 123 3

Server installation.

./include/asm/setup.h as COMMAND_LINE_SIZE.

	acpi=		[HW,ACPI,X86-64,i386]

	acpi=		[HW,ACPI,X86]

			Advanced Configuration and Power Interface

			Format: { force | off | ht | strict | noirq | rsdt }

			force -- enable ACPI if default was off

			acpi_osi="!string2"	# remove built-in string2

			acpi_osi=		# disable all strings

	acpi_pm_good	[X86-32,X86-64]

	acpi_pm_good	[X86]

			Override the pmtimer bug detection: force the kernel

			to assume that this machine's pmtimer latches its value

			and always returns good values.

			Also note the kernel might malfunction if you disable

			some critical bits.

	code_bytes	[IA32/X86_64] How many bytes of object code to print

	code_bytes	[X86] How many bytes of object code to print

			in an oops report.

			Range: 0 - 8192

			Default: 64

			MTRR settings.  This parameter disables that behavior,

			possibly causing your machine to run very slowly.

	disable_timer_pin_1 [i386,x86-64]

	disable_timer_pin_1 [X86]

			Disable PIN 1 of APIC timer

			Can be useful to work around chipset bugs.

			UART at the specified I/O port or MMIO address.

			The options are the same as for ttyS, above.

	earlyprintk=	[X86-32,X86-64,SH,BLACKFIN]

	earlyprintk=	[X86,SH,BLACKFIN]

			earlyprintk=vga

			earlyprintk=serial[,ttySn[,baudrate]]

			earlyprintk=dbgp

			See Documentation/block/as-iosched.txt and

			Documentation/block/deadline-iosched.txt for details.

	elfcorehdr=	[IA64,PPC,SH,X86-32,X86_64]

	elfcorehdr=	[IA64,PPC,SH,X86]

			Specifies physical address of start of kernel core

			image elf header. Generally kexec loader will

			pass this option to capture kernel.

			See comment before marvel_specify_io7 in

			arch/alpha/kernel/core_marvel.c.

	io_delay=	[X86-32,X86-64] I/O delay method

	io_delay=	[X86] I/O delay method

		0x80

			Standard port 0x80 based delay

		0xed

	keepinitrd	[HW,ARM]

	kernelcore=nn[KMG]	[KNL,X86-32,IA-64,PPC,X86-64] This parameter

	kernelcore=nn[KMG]	[KNL,X86,IA-64,PPC] This parameter

			specifies the amount of memory usable by the kernel

			for non-movable allocations.  The requested amount is

			spread evenly throughout all nodes in the system. The

			Configure the RouterBoard 532 series on-chip

			Ethernet adapter MAC address.

	kstack=N	[X86-32,X86-64] Print N words from the kernel stack

	kstack=N	[X86] Print N words from the kernel stack

			in oops dumps.

	l2cr=		[PPC]

	lapic		[X86-32,APIC] Enable the local APIC even if BIOS

			disabled it.

	lapic_timer_c2_ok	[X86-32,x86-64,APIC] trust the local apic timer

	lapic_timer_c2_ok	[X86,APIC] trust the local apic timer

			in C2 power state.

	libata.dma=	[LIBATA] DMA control

			[KNL,SH] Allow user to override the default size for

			per-device physically contiguous DMA buffers.

	memmap=exactmap	[KNL,X86-32,X86_64] Enable setting of an exact

	memmap=exactmap	[KNL,X86] Enable setting of an exact

			E820 memory map, as specified by the user.

			Such memmap=exactmap lines can be constructed based on

			BIOS output or other requirements. See the memmap=nn@ss

	mousedev.yres=	[MOUSE] Vertical screen resolution, used for devices

			reporting absolute coordinates, such as tablets

	movablecore=nn[KMG]	[KNL,X86-32,IA-64,PPC,X86-64] This parameter

	movablecore=nn[KMG]	[KNL,X86,IA-64,PPC] This parameter

			is similar to kernelcore except it specifies the

			amount of memory used for migratable allocations.

			If both kernelcore and movablecore is specified,

			when a NMI is triggered.

			Format: [state][,regs][,debounce][,die]

	nmi_watchdog=	[KNL,BUGS=X86-32,X86-64] Debugging features for SMP kernels

	nmi_watchdog=	[KNL,BUGS=X86] Debugging features for SMP kernels

			Format: [panic,][num]

			Valid num: 0,1,2

			0 - turn nmi_watchdog off

	nodsp		[SH] Disable hardware DSP at boot time.

	noefi		[X86-32,X86-64] Disable EFI runtime services support.

	noefi		[X86] Disable EFI runtime services support.

	noexec		[IA-64]

	noexec		[X86-32,X86-64]

	noexec		[X86]

			On X86-32 available only on PAE configured kernels.

			noexec=on: enable non-executable mappings (default)

			noexec=off: disable non-executable mappings

	noirqdebug	[X86-32] Disables the code which attempts to detect and

			disable unhandled interrupt sources.

	no_timer_check	[X86-32,X86_64,APIC] Disables the code which tests for

	no_timer_check	[X86,APIC] Disables the code which tests for

			broken timer IRQ sources.

	noisapnp	[ISAPNP] Disables ISA PnP code.

				disable the use of PCIE advanced error reporting.

		nodomains	[PCI] Disable support for multiple PCI

				root domains (aka PCI segments, in ACPI-speak).

		nommconf	[X86-32,X86_64] Disable use of MMCONFIG for PCI

		nommconf	[X86] Disable use of MMCONFIG for PCI

				Configuration

		nomsi		[MSI] If the PCI_MSI kernel config parameter is

				enabled, this kernel boot option can be used to

			reported either.

	unknown_nmi_panic

			[X86-32,X86-64]

			[X86]

			Set unknown_nmi_panic=1 early on boot.

	usbcore.autosuspend=

					medium is write-protected).

			Example: quirks=0419:aaf5:rl,0421:0433:rc

	vdso=		[X86-32,SH,x86-64]

	vdso=		[X86,SH]

			vdso=2: enable compat VDSO (default with COMPAT_VDSO)

			vdso=1: enable VDSO (default)

			vdso=0: disable VDSO mapping

	vdso32=		[X86-32,X86-64]

	vdso32=		[X86]

			vdso32=2: enable compat VDSO (default with COMPAT_VDSO)

			vdso32=1: enable 32-bit VDSO (default)

			vdso32=0: disable 32-bit VDSO mapping

To add ARP targets:

# echo +192.168.0.100 > /sys/class/net/bond0/bonding/arp_ip_target

# echo +192.168.0.101 > /sys/class/net/bond0/bonding/arp_ip_target

	NOTE:  up to 10 target addresses may be specified.

	NOTE:  up to 16 target addresses may be specified.

To remove an ARP target:

# echo -192.168.0.100 > /sys/class/net/bond0/bonding/arp_ip_target