uapi: Fix userspace compilation of ip_tables.h/ip6_tables.h in C++ mode

The implicit cast from void * is not allowed for C++ compilers, and the
arithmetic on void * generates warnings in C++ mode.

$ g++ -c t.cc
ip_tables.h:221:24: warning: pointer of type 'void *' used in arithmetic
ip_tables.h:221:24: error: invalid conversion from 'void*' to 'xt_entry_target*'

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
[KBUILD] Put the CROSS_COMPILE and ARCH variables in the build directory makefile

To make cross building a little simpler, the usage with mini-config would
be something like:

$ mkdir build
$ make ARCH=arm CROSS_COMPILE=arm-v5te-linux-gnueabi- \
       KCONFIG_ALLCONFIG=mini.config O=build allnoconfig
$ make -C build/

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
lib/vsprintf.c: Fix handling of %zd when using ssize_t

Documentation/printk-formats.txt says to use %zd for a ssize_t argument
and some drivers do. Unfortunately this prints a positive number for
negative values eg:

tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error 4294967234

Add a case to va_args a ssize_t type if the interpretation should be
signed.

Tested on PPC32.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
PPC: Do not make the entire heap executable

On PPC the ELF PLT sections look like this:

  [17] .sbss             NOBITS          0002aff8 01aff8 000014 00  WA  0   0  4
  [18] .plt              NOBITS          0002b00c 01aff8 000084 00 WAX  0   0  4
  [19] .bss              NOBITS          0002b090 01aff8 0000a4 00  WA  0   0  4

Which results in an ELF load header:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  LOAD           0x019c70 0x00029c70 0x00029c70 0x01388 0x014c4 RWE 0x10000

This is all correct, the load region containing the PLT is marked as
executable. Note that the PLT starts at 0002b00c but the file mapping ends at
0002aff8, so the PLT falls in the 0 fill section described by the load header,
and after a page boundary.

Unfortunately the generic ELF loader ignores the X bit in the load headers
when it creates the 0 filled non-file backed mappings. It assumes all of these
mappings are RW BSS sections, which is not the case for PPC.

Teach the ELF loader to check the X bit in the relevant load header and
create 0 filled anonymous mappings that are executable if the load header
requests that.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
PPC: Enable the Watchdog vector for 405

The watchdog and FIT  code has been #if 0'd for ever, if the CPU takes
an exception to either of those vectors it will jump into the middle
of the PIT or Data TLB code and surely crash.

At least some (all?) 405 cores have both the WDT and FIT
vectors defined, so lets have proper entry points for them.

Tested that the WDT vector works on a 405F6 core.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
PPC: Correct the tophys/tovirt macros

asm/page.h discusses the calculation for v2p and p2v, it should be:
 va = pa + KERNELBASE - PHYSICAL_START
which is the same as:
 va = pa + LOAD_OFFSET

tophys/tovirt were using PAGE_OFFSET, which as page.h says, is almost
always the same thing.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
PPC: Support a non zero PPC_MEMSTART

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
TPM: Issue TPM_STARTUP at driver load if the TPM has not been started

The TPM will respond to TPM_GET_CAP with TPM_ERR_INVALID_POSTINIT if
TPM_STARTUP has not been issued. Detect this and automatically
issue TPM_STARTUP.

This is for embedded applications where the kernel is the first thing
to touch the TPM.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Tested-by: Peter Huewe <peter.huewe@infineon.com>
Reviewed-by: Peter Huewe <peter.huewe@infineon.com>
TPM: Provide a tpm_tis OF driver

This provides an open firwmare driver binding for tpm_tis. OF
is useful on arches where PNP is not used.

Allow the tpm_tis driver to be selected if PNP or OF are compiled in.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
TPM: Let the tpm char device be openable multiple times

How to use the TPM is really a user space policy choice, if the
environment wants to use middleware then fine, but it is possible to
make correct TPM apps without using middleware.

So, remove the kernel restriction that only one process may open the TPM.
- TPM low level functions (in kernel users) are already locked proprely
  and can run in parallel with the user space interface anyhow.
- Move the user space data buffer and related goop into a
  struct tpm_file, create one struct tpm_file per open file.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
TPM: Work around buggy TPMs that block during continue self test

We've been testing an alternative TPM for our embedded products and
found random kernel boot failures due to time outs after the continue
self test command.

This was happening randomly, and has been *very* hard to track down, but it
looks like with this chip there is some kind of race with the tpm_tis_status()
check of TPM_STS_COMMAND_READY. If things get there 'too fast' then
it sees the chip is ready, or tpm_tis_ready() works. Otherwise it takes
somewhere over 400ms before the chip will return TPM_STS_COMMAND_READY.

Adding some delay after tpm_continue_selftest() makes things reliably
hit the failure path, otherwise it is a crapshot.

The spec says it should be returning TPM_WARN_DOING_SELFTEST, not holding
off on ready..

Boot log during this event looks like this:

tpm_tis 70030000.tpm_tis: 1.2 TPM (device-id 0x3204, rev-id 64)
tpm_tis 70030000.tpm_tis: Issuing TPM_STARTUP
tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error -62
tpm_tis 70030000.tpm_tis: [Hardware Error]: TPM command timed out during continue self test
tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error -62
tpm_tis 70030000.tpm_tis: [Hardware Error]: TPM command timed out during continue self test
tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error -62
tpm_tis 70030000.tpm_tis: [Hardware Error]: TPM command timed out during continue self test
tpm_tis 70030000.tpm_tis: tpm_transmit: tpm_send: error -62
tpm_tis 70030000.tpm_tis: [Hardware Error]: TPM command timed out during continue self test

The other TPM vendor we use doesn't show this wonky behaviour:
tpm_tis 70030000.tpm_tis: 1.2 TPM (device-id 0xFE, rev-id 70)

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
TPM: Add a tpm_i2c_nuvoton driver

This is copied from the Infineon driver, they should be merged or
something.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
TPM: Switch to __packed instead of __attribute__((packed))

This seems to be preferred these days.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
[ARM] Use AT() in the linker script to create correct program headers

The standard linux asm-generic/vmlinux.lds.h already supports this,
and it seems other architectures do as well.

The goal is to create an ELF file that has correct program headers. We
want to see the VirtAddr be the runtime address of the kernel with the
MMU turned on, and PhysAddr be the physical load address for the section
with no MMU.

This allows ELF based boot loaders to properly load vmlinux:

$ readelf -l vmlinux
Entry point 0x8000
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  LOAD           0x008000 0xc0008000 0x00008000 0x372244 0x3a4310 RWE 0x8000

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
[ARM] Enable the second I2C bus on Marvell Kirkwood

mv64xxx_of_config requires that the tclk frequency be found
through the clk stuff rather than through device tree, so add
another override for the 2nd controller.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
[ARM] Add SPI_CHPA and SPI_CPOL support to spi-orion

Support these transfer modes from the SPI layer by setting
the appropriate register bits before doing the transfer.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Rolf Manderscheid <rvm@obsidianresearch.com>
mv643xx.c: Add basic device tree support.

This patch adds basic device tree support to the mv643xx ethernet driver.

    It should be enough for most current users of the device, and should allow
    a painless migration.

    Signed-off-by: Ian Molton <ian.molton@codethink.co.uk>
mv643xx_eth: use MAC address from device tree if specified

Signed-off-by: Rolf Manderscheid <rvm@obsidianresearch.com>
kirkwood: Add fixups for DT based mv643xx ethernet.

This patch adds auxdata for kirkwood ethernet and an ethernet clock setup
helper function allowing the mv643xx clock to be kept enabled after boot so
that the MAC address(es) are not lost.

Signed-off-by: Ian Molton <ian.molton@codethink.co.uk>
ARM: Kirkwood: Use hw_pci.ops instead of hw_pci.scan

The kirkwood_pcie_scan_bus function duplicates the common code in
bios32.c, passing ops in will use the common code..

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>