linux-toradex.git/arch/powerpc/include/asm/opal.h, branch v3.17

powerpc/powernv: Interface to register/unregister opal dump region

2014-08-13T05:13:45+00:00

PowerNV platform is capable of capturing host memory region when system
crashes (because of host/firmware). We have new OPAL API to register/
unregister memory region to be captured when system crashes.

This patch adds support for new API. Also during boot time we register
kernel log buffer and unregister before doing kexec.

Signed-off-by: Vasant Hegde 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Invoke opal call to handle hmi.

2014-08-05T06:33:52+00:00

When we hit the HMI in Linux, invoke opal call to handle/recover from HMI
errors in real mode and then in virtual mode during check_irq_replay()
invoke opal_poll_events()/opal_do_notifier() to retrieve HMI event from
OPAL and act accordingly.

Now that we are ready to handle HMI interrupt directly in linux, remove
the HMI interrupt registration with firmware.

Signed-off-by: Mahesh Salgaonkar 
Signed-off-by: Benjamin Herrenschmidt

powerpc/book3s: Add basic infrastructure to handle HMI in Linux.

2014-08-05T06:33:48+00:00

Handle Hypervisor Maintenance Interrupt (HMI) in Linux. This patch implements
basic infrastructure to handle HMI in Linux host. The design is to invoke
opal handle hmi in real mode for recovery and set irq_pending when we hit HMI.
During check_irq_replay pull opal hmi event and print hmi info on console.

Signed-off-by: Mahesh Salgaonkar 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Allow to freeze PE

2014-08-05T05:41:52+00:00

The patch synchronizes header file with firmware to have new OPAL
API opal_pci_eeh_freeze_set(), which is used to freeze the specified
PE in order to support "compound" PE.

Signed-off-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Enable M64 aperatus for PHB3

2014-08-05T05:41:47+00:00

This patch enables M64 aperatus for PHB3.

We already had platform hook (ppc_md.pcibios_window_alignment) to affect
the PCI resource assignment done in PCI core so that each PE's M32 resource
was built on basis of M32 segment size. Similarly, we're using that for
M64 assignment on basis of M64 segment size.

   * We're using last M64 BAR to cover M64 aperatus, and it's shared by all
     256 PEs.
   * We don't support P7IOC yet. However, some function callbacks are added
     to (struct pnv_phb) so that we can reuse them on P7IOC in future.
   * PE, corresponding to PCI bus with large M64 BAR device attached, might
     span multiple M64 segments. We introduce "compound" PE to cover the case.
     The compound PE is a list of PEs and the master PE is used as before.
     The slave PEs are just for MMIO isolation.

Signed-off-by: Guo Chao 
Signed-off-by: Benjamin Herrenschmidt

powerpc/eeh: Make diag-data not endian dependent

2014-08-05T05:41:38+00:00

It's followup of commit ddf0322a ("powerpc/powernv: Fix endianness
problems in EEH"). The patch helps to get non-endian-dependent
diag-data.

Cc: Guo Chao 
Signed-off-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Remove OPAL v1 takeover

2014-06-25T03:10:47+00:00

In commit 27f4488872d9 "Add OPAL takeover from PowerVM" we added support
for "takeover" on OPAL v1 machines.

This was a mode of operation where we would boot under pHyp, and query
for the presence of OPAL. If detected we would then do a special
sequence to take over the machine, and the kernel would end up running
in hypervisor mode.

OPAL v1 was never a supported product, and was never shipped outside
IBM. As far as we know no one is still using it.

Newer versions of OPAL do not use the takeover mechanism. Although the
query for OPAL should be harmless on machines with newer OPAL, we have
seen a machine where it causes a crash in Open Firmware.

The code in early_init_devtree() to copy boot_command_line into cmd_line
was added in commit 817c21ad9a1f "Get kernel command line accross OPAL
takeover", and AFAIK is only used by takeover, so should also be
removed.

Signed-off-by: Michael Ellerman 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Fix endianness problems in EEH

2014-06-11T07:03:23+00:00

EEH information fetched from OPAL need fix before using in LE environment.
To be included in sparse's endian check, declare them as __beXX and
access them by accessors.

Cc: Gavin Shan 

Signed-off-by: Guo Chao 
Acked-by: Gavin Shan 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Fix endian issues in memory error handling code

2014-06-05T03:20:39+00:00

struct OpalMemoryErrorData is passed to us from firmware, so we
have to byteswap it.

Signed-off-by: Anton Blanchard 
Signed-off-by: Benjamin Herrenschmidt

powerpc/powernv: Add calls to support little endian host

2014-06-05T03:19:59+00:00

When running as a powernv "host" system on P8, we need to switch
the endianness of interrupt handlers. This does it via the appropriate
call to the OPAL firmware which may result in just switching HID0:HILE
but depending on the processor version might need to do a few more
things. This call must be done early before any other processor has
been brought out of firmware.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Andy Whitcroft 
Signed-off-by: Benjamin Herrenschmidt