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This patch adds a new opal call to enable/disable a sensor group. This
call is used to select the sensor groups that needs to be copied to
main memory by OCC at runtime.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
[stewart: rebase and bump OPAL API number]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This patch adds support to read u64 sensor values. This also adds
changes to the core and the backend implementation code to make this
API as the base call. Host can use this new API to read sensors
upto 64bits.
This adds a list to store the pointer to the kernel u32 buffer, for
older kernels making async sensor u32 reads.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This is a new CPU feature advertising interface that is fine-grained,
extensible, aware of privilege levels, and gives control of features
to all levels of the stack (firmware, hypervisor, and OS).
The design and binding specification is described in detail in doc/.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[stewart: fix maybe-uninitialized warning from older GCC, doc cleanup]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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The current boot sequence inherits MSR[ME] from the IPL firmware, and
never changes it. Some environments disable MSR[ME] (e.g., mambo), and
others can enable it (hostboot).
This has two problems. First, MSR[ME] must be disabled while in the
process of taking over the interrupt vector from the previous
environment. Second, after installing our machine check handler,
MSR[ME] should be enabled to get some useful output rather than a
checkstop.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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get_symbol is difficult to use. Add snprintf_symbol helper which
prints a symbol into a buffer with length, and returns the number
of bytes used, similarly to snprintf. Use this in the stack dumping
code rather than open-coding it.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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While waking up from stop11, we want NCU_DARN_BAR to have enable bit set.
Without this stop_api call, the value restored is without enable bit set.
We loose NCU_SPEC_BAR when the quad goes into stop11, stop_api will
restore while waking up from stop11.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Patch adds a global variable which indicates if the deep states are enabled
through stop-enabled-bits. Only applies to POWER9.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Patch introduces wakeup_engine_state which replaces a bool
has_wakeup_engine. wakeup_engine_state can have 3 states :
- WAKEUP_ENGINE_PRESENT : When everything is good.
- WAKEUP_ENGINE_NOT_PRESENT : When wakeup_engine is not correctly detected.
- WAKEUP_ENGINE_FAILED : If any operation on wakeup_engine failed.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This adds the flash_map_resource_name() to allow skiboot subsystems to
lookup the name of a PNOR partition. Thus, we don't need to duplicate
the same information in other places (e.g. libstb).
Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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A first basic set of tests for mbox-flash. These tests do their testing
by stubbing out or otherwise replacing functions not in
libflash/mbox-flash.c. The stubbed out version of the function can then
be used to emulate a BMC mbox daemon talking to back to the code in
mbox-flash and it can ensure that there is some adherence to the
protocol and that from a blocklevel api point of view the world appears
sane.
This makes these tests simple to run and they have been integrated into
`make check`. The down side is that these tests rely on duplicated
feature incomplete BMC daemon behaviour. Therefore these tests are a
strong indicator of broken behaviour but a very unreliable indicator of
correctness.
Full integration tests with a 'real' BMC daemon are probably beyond the
scope of this repository.
Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com>
[stewart: fix TESTS_LOOPS printf]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This patch adds support to handle OCC load/start event from FSP/PRD.
During IPL we send a success directly to FSP without invoking any HBRT
load routines on recieving OCC load mbox message from FSP. At runtime
we forward this event to host opal-prd.
This patch provides support for invoking OCC load/start HBRT routines
like load_pm_complex() and start_pm_complex() from opal-prd.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This patch handles OCC_RESET runtime events in host opal-prd and also
provides support for calling 'hostinterface->wakeup()' which is
required for doing the reset operation.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add pm idle support to POWER9. IPIs are implemented with doorbells.
POWER9 can use the EC=ESL=0 (lite) stop when sreset is not available.
EC=ESL=1 state with RL=3 is enabled when we have a sreset wakeup.
Deep idle states are not implemented.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This implements OPAL_SIGNAL_SYSTEM_RESET, using scom registers to
quiesce the target thread and raise a system reset exception on it.
It has been tested on DD2 with stop0 ESL=0 and ESL=1 shallow power
saving modes.
DD1 is not implemented because it is sufficiently different as to
make support difficult.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[stewart@linux.vnet.ibm.com: fixup hdat_to_dt test]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add a dummy is_rodata() implementation for use inside test code.
Currently we don't need to make this actually check if the given
pointer is actually read-only, but someone might want it to work
properly in the future.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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In P8, hostboot provides mini device tree. It contains /ibm,firmware-versions
node which has various firmware component version details.
In P9, OPAL is building device tree. This patch adds support to parse VERSION
section of PNOR and create "/ibm,firmware-versions" device tree node.
Sample output:
/sys/firmware/devicetree/base/ibm,firmware-versions # lsprop .
occ "6a00709"
skiboot "v5.7-rc1-p344fb62"
buildroot "2017.02.2-7-g23118ce"
capp-ucode "9c73e9f"
petitboot "v1.4.3-p98b6d83"
sbe "02021c6"
open-power "witherspoon-v1.17-128-gf1b53c7-dirty"
....
....
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Mukesh Ojha <mukesh02@linux.vnet.ibm.com>
Reviewed-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Adds a generic API to clear sensor groups. OCC inband sensor groups
such as CSM, Profiler and Job Scheduler can be cleared using this API.
It will clear the min/max of all sensors belonging to OCC sensor
groups.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add support to parse and export OCC inband sensors which are copied
by OCC to main memory in P9. Each OCC writes three buffers which
includes one names buffer for sensor meta data and two buffers for
sensor readings. While OCC writes to one buffer the sensor values
can be read from the other buffer. The sensors are updated every
100ms.
This patch adds power, temperature, current and voltage sensors to
/ibm,opal/sensors device-tree node which can be exported by the
ibmpowernv-hwmon driver in Linux.
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Uses broadcast TLBIE's to cleanup the TLB on all cores and on
the nest MMU
By default this works with older binutils but there is a version (in
#defines) that requires newer binutils and which documents what the
instructions are.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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It uses tlbiel and only cleans up the TLB of the calling core
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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The code is duplicated between phb3 and phb4 for no reason
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
# Conflicts:
# core/init.c
# hw/phb3.c
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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CAPP microcode flash download and CAPP upload for PHB4.
A new file 'capp.c' is created to receive common capp code for PHB3 and
PHB4.
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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SBE sends passthrough command. We have to capture this interrupt and
send event to HBRT via opal-prd (user space daemon).
This patch adds minimal SBE code to capture SBE interrupt and send
event to opal-prd. Next patch will add opal-prd (user space) support.
CC: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This adds two new nvram options to set the console log level for the
driver/uart and in memory. These are called log-level-memory and
log-level-driver.
These are only set once we have nvram inited.
To set them you do:
nvram -p ibm,skiboot --update-config log-level-memory=9
nvram -p ibm,skiboot --update-config log-level-driver=9
You can also use the named versions of emerg, alert, crit, err,
warning, notice, printf, info, debug, trace or insane. ie.
nvram -p ibm,skiboot --update-config log-level-driver=insane
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Cyril Bur <cyril.bur@au1.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This patch fixes the SCOM address for OCC_MISC register which is used
for OCC interupts. In P9, OCC sends an interrupt to notify change in
the shared memory like throttle status. This patch handles this
interrupt reason.
Originally-from: Michael Neuling <mikey@neuling.org>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
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NVLink2 is a new feature introduced on POWER9 systems. It is an
evolution of of the NVLink1 feature included in POWER8+ systems but
adds several new features including support for GPU address
translation using the Nest MMU and cache coherence.
Similar to NVLink1 the functionality is exposed to the OS as a series
of virtual PCIe devices. However the actual hardware interfaces are
significantly different which limits the amount of common code that
can be shared between implementations in the firmware.
This patch adds basic hardware initialisation and exposure of the
virtual NVLink2 PCIe devices to the running OS.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This adds an nvram parameter pcie-max-link-speed to configure the max
speed of the pcie link. This can be set from the petitboot prompt
using:
nvram -p ibm,skiboot --update-config pcie-max-link-speed=4
This takes preference over anything set in the device tree and is
global to all PHBs.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This moves the parsing of the BMC and LPC details to the start of the
HDAT parsing. This allows us to enable the Skiboot log console earlier
so we can get debug output while parsing the rest of the HDAT.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This adds an internal skiboot API for accessing the AST BMC mbox
registers.
Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This was broken on Rhesus. Also add an nvram way of
overriding the policy
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Implement a fake NVRAM device based on arbitrary memory reserves.
This allows NVRAM images to be preloaded without the FSP.
Signed-off-by: Jack Miller <jack@codezen.org>
Tested-by: Chris Smart <chris@distroguy.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Otherwise we'd default to 2seconds (TIMER_POLL) during boot on
chips with a functional i2c interrupt, leading to slow i2c
during boot (or hitting timeouts instead).
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
[stewart@linux.vnet.ibm.com: unlock before return (suggested by Mahesh/Andrew),
disable only on non-cancelling fsp codeupdate call (suggested by Vasant)]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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From the subpartition structure, we have the ability to compute
the full partition size. Do that.
This lets us only read the amount of a subpartition that is valid
and needed to be read, rather than having to read the entire thing.
We continue the current behaviour of loading flash partitions though.
Based-on-patch-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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A unit test for parsing sub-partition info is useful for a number
of reasons, one of which showed its head during development of
secure/trusted boot.
This patch just moves things around, there's no functional changes.
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This is an experimental patch that implements "Fast reboot" on P8
machines.
The basic idea is that when the OS calls OPAL reboot, we gather all
the threads in the system using a combination of patching the reset
vector and soft-resetting them, then cleanup a few bits of hardware
(we do re-probe PCIe for example), and reload & restart the bootloader.
For Trusted Boot, this means we *add* measurements to the TPM, so you
will get *different* PCR values as compared to a full IPL. This makes
sense as if you want to be sure you are running something known then,
well, do a full IPL as soft reset should never be trusted to clear any
malicious code.
This is very experimental and needs a lot of testing and also auditing
code for other bits of HW that might need to be cleaned up.
BenH TODO: I also need to check if we are properly PERST'ing PCI devices.
This is partially based on old code I had to do that on P7. I only
support it on P8 though as there are issues with the PSI interrupts
on P7 that cannot be reliably solved.
Even though this should be considered somewhat experimental, we've had
a lot of success on a variety of machines. Dozens/hundreds of reboots
across Tuleta, Garrison and Habanero.
Currently, we've hidden it behind a NVRAM config option, which *is*
liable to change in the future (to ensure that only those who know
what they're doing enable it)
You can enable the experimental support via nvram option:
nvram -p ibm,skiboot --update-config experimental-fast-reset=feeling-lucky
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[stewart@linux.vnet.ibm.com: hide behind nvram option, include Mambo fixes
from Mikey]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Currently, the CAPP lid has the TOC (4K) and one supartition (36K). For
secure boot we can either build one container for the TOC and another one for
the subpartition, or build one container for the whole CAPP partition.
We decided implement the second option.
The first option would require changes to the CAPP TOC layout in order to
correlate the TOC with the subpartitions. Besides that, the first option
also increases the boot time since we would need to verify and measure
the CAPP TOC.
This patch adds the flash_subpart_info function so the correct CAPP
subpartition can be selected also outside of the flash API.
Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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master_cpu is used to determine the ChipTOD master if no ChipTOD
information is available in the HDAT. However, it is set to zero at every
skiboot entry point (fdt_entry, the 0x180 FSP entry and
opal_boot_trampoline) and is otherwise unused. This patch removes this
passing around and uses the boot CPU PIR to find the ChipTOD master rather
than zero.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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The current flash code was written with only one flash chip, which is
a system_flash (ie. the PNOR image), in mind.
Now that we have mambo bogusdisk flash, we can have many flash chips.
This is resulting in some confusing output messages.
This reworks some of the error paths and warnings to make this more
coherent when we have multiple flash chips.
We assume everything can be a system flash, so I've removed the
is_system_flash parameter from flash_register(). We'll use the first
system flash we find and warn if we find another since discovery order
is not a guaranteed API.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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The patch code itself is unchanged (for now...). Install it during
boot so we will be able to use power management instructions. We
can't just have a proper exception code built at 0x100 as this is
otherwise one of our entry points.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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And add an argument to specify whether to enter nap or rvwinkle
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This adds the base support for the PHB4. It currently only support
the M32 window, EEH or in general error recovery aren't supported
yet.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[stewart@linux.vnet.ibm.com: update (C) year, fix indenting]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add more generic support for MMIO based UARTs, simplify code,
use common initialization, and clean up the device-tree
representation as well.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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The root node is excluded in the device sub-tree created during
PCI hot add time. This adds one extra argument @exclusive to
flatten_dt_node(), __create_dtb() and create_dtb() to indicate
the root node should be excluded or not. The changes are going
to be used by PCI hot add path and it's not affecting anything
at present.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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We make parse_hdat() return success/failure rather than assert.
This allows the hdata_to_dt binary to gracefully error out rather
than assert, which is useful when throwing it at a fuzzer.
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Add PVR detection, chip id and other misc bits for POWER9.
POWER9 changes the location of the HILE and attn enable bits in the
HID0 register, so add these definitions also.
Signed-off-by: Michael Neuling <mikey@neuling.org>
[stewart@linux.vnet.ibm.com: Fix Numbus typo, hdata_to_dt build fixes]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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p5ioc2 is used by approximately 2 machines in the world, and has never
ever been a supported configuration.
Not only is the code virtually unused and very tricky to test, but
keeping it around is making life unnecessarily difficult:
- It's more complexity to manage for things such as PCI slot support
- It's more code for static analysis to cover, which means more time
fixing bugs that affect no-one.
- It's bloating every single install of skiboot for no benefit.
- It's reducing coverage stats, which is sad.
Drop p5ioc2.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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05f52a8dd7c7e402896e049fd24f83d56b70aff4 core: Setup the OPAL DT node
before platform probe
add_cpu_idle_state_properties() was made local to slw.c in the above
commit which caused p7 systems to not populate the nap idle state in
DT. So moving add_cpu_idle_state_properties() to add_opal_node to fix
this bug.
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This patch adds support for the NPU Nvlink PHB type. It provides
access to each nvlink in the system by exposing them as PCIe devices
under a NPU PHB type. Each PCIe device has a configuration space
implemented in software which indicates the base address of the
DL/TL/PL registers required by the device drivers.
It also presents one LSI per device which is used to signal device
drivers of changes in device status. The configuration space also adds
a vendor specific capability which is used primarily by device drivers
to power on an train the IBM PHY.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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This tells us when we've entered the host. First use case is knowing if
we can can rely on host communication working, such as receiving and
acting on an opal_msg.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[stewart@linux.vnet.ibm.com: use real bit field rather than C bitfield]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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