User creatable root ports are being parented by the 'peripheral' or the
'peripheral-anon' container. This happens because this is the regular
QOM schema for sysbus devices that are added via the command line.
Let's make this QOM hierarchy similar to what we have with default root
ports, i.e. the root port must be parented by the pnv-root-bus. To do
that we change the qom and bus parent of the root port during
root_port_realize(). The realize() is shared by the default root port
code path, so we can remove the code inside pnv_phb_attach_root_port()
that was adding the root port as a child of the bus as well.
After all that, remove pnv_phb_attach_root_port() and create the root
port explictly in the 'default_enabled()' case of pnv_phb_realize().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220819094748.400578-3-danielhb413@gmail.com>
We have 2 helpers that amends the QOM and parent bus of a given object,
repectively. These 2 helpers are called together, and not by accident.
Due to QOM internals, doing an object_unparent() will result in the
device being removed from its parent bus. This means that changing the
QOM parent requires reassigning the parent bus again.
Create a single helper called pnv_parent_fixup(), documenting some of
the QOM specifics that we're dealing with the unparenting/parenting
mechanics, and handle both the QOM and the parent bus assignment.
Next patch will make use of this function to handle a case where we need
to change the QOM parent while keeping the same parent bus assigned
beforehand.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220819094748.400578-2-danielhb413@gmail.com>
Enable pnv-phb user created devices for powernv9 now that we have
everything in place.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-9-danielhb413@gmail.com>
The bulk of the work was already done by previous patches.
Use defaults_enabled() to determine whether we need to create the
default devices or not.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-7-danielhb413@gmail.com>
pnv_parent_qom_fixup() and pnv_parent_bus_fixup() are versions of the
helpers that were reverted by commit 9c10d86fee "ppc/pnv: Remove
user-created PHB{3,4,5} devices". They are needed to amend the QOM and
bus hierarchies of user created pnv-phbs, matching them with default
pnv-phbs.
A new helper pnv_phb_user_device_init() is created to handle
user-created devices setup. We're going to call it inside
pnv_phb_realize() in case we're realizing an user created device. This
will centralize all user device realated in a single spot, leaving the
realize functions of the phb3/phb4 backends untouched.
Another helper called pnv_chip_add_phb() was added to handle the
particularities of each chip version when adding a new PHB.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-5-danielhb413@gmail.com>
For default root ports we have a way of accessing chassis and slot,
before root_port_realize(), via pnv_phb_attach_root_port(). For the
future user created root ports this won't be the case: we can't use
this helper because we don't have access to the PHB phb-id/chip-id
values.
In earlier patches we've added phb-id and chip-id to pnv-phb-root-bus
objects. We're now able to use the bus to retrieve them. The bus is
reachable for both user created and default devices, so we're changing
all the code paths. This also allow us to validate these changes with
the existing default devices.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-4-danielhb413@gmail.com>
The same rationale provided in the PHB3 bus case applies here.
Note: we could have merged both buses in a single object, like we did
with the root ports, and spare some boilerplate. The reason we opted to
preserve both buses objects is twofold:
- there's not user side advantage in doing so. Unifying the root ports
presents a clear user QOL change when we enable user created devices back.
The buses objects, aside from having a different QOM name, is transparent
to the user;
- we leave a door opened in case we want to increase the root port limit
for phb4/5 later on without having to deal with phb3 code.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-3-danielhb413@gmail.com>
We rely on the phb-id and chip-id, which are PHB properties, to assign
chassis and slot to the root port. For default devices this is no big
deal: the root port is being created under pnv_phb_realize() and the
values are being passed on via the 'index' and 'chip-id' of the
pnv_phb_attach_root_port() helper.
If we want to implement user created root ports we have a problem. The
user created root port will not be aware of which PHB it belongs to,
unless we're willing to violate QOM best practices and access the PHB
via dev->parent_bus->parent. What we can do is to access the root bus
parent bus.
Since we're already assigning the root port as QOM child of the bus, and
the bus is initiated using PHB properties, let's add phb-id and chip-id
as properties of the bus. This will allow us trivial access to them, for
both user-created and default root ports, without doing anything too
shady with QOM.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-2-danielhb413@gmail.com>
The helper is only used in this file.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-13-danielhb413@gmail.com>
The attribute is unused.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-11-danielhb413@gmail.com>
We support only a single root port, PNV_PHB_ROOT_PORT.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-10-danielhb413@gmail.com>
The unified pnv-phb-root-port can be used instead. The phb4-root-port
device isn't exposed to the user in any official QEMU release so there's
no ABI breakage in removing it.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-9-danielhb413@gmail.com>
The unified pnv-phb-root-port can be used in its place. There is no ABI
breakage in doing so because no official QEMU release introduced user
creatable pnv-phb3-root-port devices.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-8-danielhb413@gmail.com>
We have two very similar root-port devices, pnv-phb3-root-port and
pnv-phb4-root-port. Both consist of a wrapper around the PCIESlot device
that, until now, has no additional attributes.
The main difference between the PHB3 and PHB4 root ports is that
pnv-phb4-root-port has the pnv_phb4_root_port_reset() callback. All
other differences can be merged in a single device without too much
trouble.
This patch introduces the unified pnv-phb-root-port that, in time, will
be used as the default root port for the pnv-phb device.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-7-danielhb413@gmail.com>
Change the parent type of the PnvPHB4 device to TYPE_PARENT since the
PCI bus is going to be initialized by the PnvPHB parent. Functions that
needs to access the bus via a PnvPHB4 object can do so via the
phb4->phb_base pointer.
pnv_phb4_pec now creates a PnvPHB object.
The powernv9 machine class will create PnvPHB devices with version '4'.
powernv10 will create using version '5'. Both are using global machine
properties in their class_init() to do that.
These changes will benefit us when adding PnvPHB user creatable devices
for powernv9 and powernv10.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-6-danielhb413@gmail.com>
Similar to what we already did for the PnvPHB3 device, let's add a
helper to init the bus when using a PnvPHB4. This helper will be used by
PnvPHb when PnvPHB4 turns into a backend.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-5-danielhb413@gmail.com>
We need a handful of changes that needs to be done in a single swoop to
turn PnvPHB3 into a PnvPHB backend.
In the PnvPHB3, since the PnvPHB device implements PCIExpressHost and
will hold the PCI bus, change PnvPHB3 parent to TYPE_DEVICE. There are a
couple of instances in pnv_phb3.c that needs to access the PCI bus, so a
phb_base pointer is added to allow access to the parent PnvPHB. The
PnvPHB3 root port will now be connected to a PnvPHB object.
In pnv.c, the powernv8 machine chip8 will now hold an array of PnvPHB
objects. pnv_get_phb3_child() needs to be adapted to return the PnvPHB3
backend from the PnvPHB child. A global property is added in
pnv_machine_power8_class_init() to ensure that all PnvPHBs are created
with phb->version = 3.
After all these changes we're still able to boot a powernv8 machine with
default settings. The real gain will come with user created PnvPHB
devices, coming up next.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-4-danielhb413@gmail.com>
The PnvPHB device is going to be the base device for all other powernv
PHBs. It consists of a device that has the same user API as the other
PHB, namely being a PCIHostBridge and having chip-id and index
properties. It also has a 'backend' pointer that will be initialized
with the PHB implementation that the device is going to use.
The initialization of the PHB backend is done by checking the PHB
version via a 'version' attribute that can be set via a global machine
property. The 'version' field will be used to make adjustments based on
the running version, e.g. PHB3 uses a 'chip' reference while PHB4 uses
'pec'. To init the PnvPHB bus we'll rely on helpers for each version.
The version 3 helper is already added (pnv_phb3_bus_init), the PHB4
helper will be added later on.
For now let's add the basic logic of the PnvPHB object, which consists
mostly of pnv_phb_realize() doing all the work of checking the
phb->version set, initializing the proper backend, passing through its
attributes to the chosen backend, finalizing the backend realize and
adding a root port in the end.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-3-danielhb413@gmail.com>
The PnvPHB3 bus init consists of initializing the pci_io and pci_mmio
regions, registering it via pci_register_root_bus() and then setup the
iommu.
We'll want to init the bus from outside pnv_phb3.c when the bus is
removed from the PnvPHB3 device and put into a new parent PnvPHB device.
The new pnv_phb3_bus_init() helper will be used by the parent to init
the bus when using the PHB3 backend.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-2-danielhb413@gmail.com>
At the start of pc_memory_init() we usually pass a range of
0..UINT64_MAX as pci_memory, when really its 2G (i440fx) or
32G (q35). To get the real user value, we need to get pci-host
passed property for default pci_hole64_size. Thus to get that,
create the qdev prior to memory init to better make estimations
on max used/phys addr.
This is in preparation to determine that host-phys-bits are
enough and also for pci-hole64-size to be considered to relocate
ram-above-4g to be at 1T (on AMD platforms).
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-3-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
It keeps repeating, move it to the header. This uses __builtin_ffsll() to
allow using the macros in #define.
This is not using the QEMU's FIELD macros as this would require changing
all such macros found in skiboot (the PPC PowerNV firmware).
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220628080544.1509428-1-aik@ozlabs.ru>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
It is not advisable to execute an object_dynamic_cast() to poke into
bus->qbus.parent and follow it up with a C cast into the PnvPHB type we
think we got.
In fact this is not needed. There is nothing sophisticated being done
with the PHB object retrieved during root_port_realize() for both PHB3
and PHB4. We're retrieving a PHB reference just to access phb->chip_id
and phb->phb_id and use them to define the chassis/slot of the root
port.
phb->phb_id is already being passed to pnv_phb_attach_root_port() via
the 'index' parameter. Let's also add a 'chip_id' parameter to this
function and assign chassis and slot right there. This will spare us
from the hassle of accessing the PHB object inside realize().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220621173436.165912-4-danielhb413@gmail.com>
Creating a root port is something related to the PHB, not the PEC. It
also makes the logic more in line with what pnv-phb3 does.
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220621173436.165912-2-danielhb413@gmail.com>
pi440fx_state is an out-parameter which is never read by the caller.
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20220612192800.40813-1-shentey@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The DEFINE_PROP* macros in pnv files are using extra spaces for no good
reason.
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20220602215351.149910-1-danielhb413@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
According to spec:
"TSEG Enable (T_EN): Enabling of SMRAM memory for Extended SMRAM space
only. When G_SMRAME = 1 and TSEG_EN = 1, the TSEG is enabled to appear
in the appropriate physical address space. Note that once D_LCK is set,
this bit becomes read only."
Changed to match the spec description.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220615034501.2733802-1-zhenzhong.duan@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This adds code to instantiate the slightly extended ACPI root port
description in DSDT as per the CXL 2.0 specification.
Basically a cut and paste job from the i386/pc code.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220429144110.25167-30-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Move the DINO device implementation from hw/hppa to hw/pci-host so that it is
located with all the other PCI host bridges.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20220504092600.10048-23-mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
The phb3/phb4/phb5 root ports inherit from the default PCIE root port
implementation, which requests a LSI interrupt (#INTA). On real
hardware (POWER8/POWER9/POWER10), there is no such LSI. This patch
corrects it so that it matches the hardware.
As a consequence, the device tree previously generated was bogus, as
the root bridge LSI was not properly mapped. On some
implementation (powernv9), it was leading to inconsistent interrupt
controller (xive) data. With this patch, it is now clean.
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220408131303.147840-3-fbarrat@linux.ibm.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
g_new(T, n) is neater than g_malloc(sizeof(T) * n). It's also safer,
for two reasons. One, it catches multiplication overflowing size_t.
Two, it returns T * rather than void *, which lets the compiler catch
more type errors.
This commit only touches allocations with size arguments of the form
sizeof(T).
Patch created mechanically with:
$ spatch --in-place --sp-file scripts/coccinelle/use-g_new-etc.cocci \
--macro-file scripts/cocci-macro-file.h FILES...
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20220315144156.1595462-4-armbru@redhat.com>
Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
On a real system with POWER{8,9,10} processors, PHBs are sub-units of
the processor, they can be deactivated by firmware but not plugged in
or out like a PCI adapter on a slot. Nevertheless, having user-created
PHBs in QEMU seemed to be a good idea for testing purposes :
1. having a limited set of PHBs speedups boot time.
2. it is useful to be able to mimic a partially broken topology you
some time have to deal with during bring-up.
PowerNV is also used for distro install tests and having libvirt
support eases these tasks. libvirt prefers to run the machine with
-nodefaults to be sure not to drag unexpected devices which would need
to be defined in the domain file without being specified on the QEMU
command line. For this reason :
3. -nodefaults should not include default PHBs
User-created PHB{3,4,5} devices satisfied all these needs but reality
proves to be a bit more complex, internally when modeling such
devices, and externally when dealing with the user interface.
Req 1. and 2. can be simply addressed differently with a machine option:
"phb-mask=<uint>", which QEMU would use to enable/disable PHB device
nodes when creating the device tree.
For Req 3., we need to make sure we are taking the right approach. It
seems that we should expose a new type of user-created PHB device, a
generic virtualized one, that libvirt would use and not one depending
on the processor revision. This needs more thinking.
For now, remove user-created PHB{3,4,5} devices. All the cleanups we
did are not lost and they will be useful for the next steps.
Fixes: 5bc67b052b ("ppc/pnv: Introduce user creatable pnv-phb4 devices")
Fixes: 1f6a88fffc ("ppc/pnv: Introduce support for user created PHB3 devices")
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220314130514.529931-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
We already have the pnv-phb3 and pnv-phb4 devices for POWER8 and
POWER9 respectively. POWER10 uses version 5 of the PHB. It is very
close to the PHB4 from POWER9, at least in our model and we could
almost keep using the PHB4 model. However the matching root port
pnv-phb5-root-port is specific to POWER10 so to avoid confusion as
well as making it easy to introduce differences later, we create a
pnv-phb5 class, which is mostly an alias for pnv-phb4 for now.
With this patch, the command line for a user-created PHB on powernv10
becomes:
-machine powernv10 -nodefaults -device pnv-phb5 -device pnv-phb5-root-port
Fixes: 623575e16c ("ppc/pnv: Add model for POWER10 PHB5 PCIe Host bridge")
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220310155101.294568-2-fbarrat@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
When the Address-Based Interrupt Trigger mode is activated, the PHB
maps the interrupt source number into the interrupt command address.
The PHB directly triggers the IC ESB page of the interrupt number and
not the notify page of the IC anymore.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The PQ_disable configuration bit disables the check done on the PQ
state bits when processing new MSI interrupts. When bit 9 is enabled,
the PHB forwards any MSI trigger to the XIVE interrupt controller
without checking the PQ state bits. The XIVE IC knows from the trigger
message that the PQ bits have not been checked and performs the check
locally.
This configuration bit only applies to MSIs and LSIs are still checked
on the PHB to handle the assertion level.
PQ_disable enablement is a requirement for StoreEOI.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The trigger message coming from a HW source contains a special bit
informing the XIVE interrupt controller that the PQ bits have been
checked at the source or not. Depending on the value, the IC can
perform the check and the state transition locally using its own PQ
state bits.
The following changes add new accessors to the XiveRouter required to
query and update the PQ state bits. This only applies to the PowerNV
machine. sPAPR accessors are provided but the pSeries machine should
not be concerned by such complex configuration for the moment.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Commit 3f4c369ea6 ("ppc/pnv: make PECs create and realize PHB4s")
changed phb4_pec code to create the default PHB4 objects in
pnv_pec_default_phb_realize(). In this process the stacks[] PEC array was
removed and each PHB4 object is tied together with its PEC via the
phb->pec pointer.
This change also broke the previous QOM hierarchy - the PHB4 objects are
being created and not being parented to their respective chips. This can
be verified by 'info pic' in a powernv9 domain with default settings.
pnv_chip_power9_pic_print_info() will fail to find the PHBs because
object_child_foreach_recursive() won't find any.
The solution is to set the parent chip and the parent bus, in the same
way done for user created PHB4 devices, for all PHB4 devices.
Fixes: 3f4c369ea6 ("ppc/pnv: make PECs create and realize PHB4s")
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220218202804.413157-1-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
pnv_phb4_translate_tve() is quite similar to pnv_phb3_translate_tve(),
and that includes the fact that 'taddr' can be considered uninitialized
when throwing the "TCE access fault" error because, in theory, the loop
that sets 'taddr' can be skippable due to 'lev' being an signed int.
No one complained about this specific case yet, but since we took the
time to handle the same situtation in pnv_phb3_translate_tve(), let's
replicate it here as well.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220127122234.842145-3-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The 'taddr' variable is left unintialized, being set only inside the
"while ((lev--) >= 0)" loop where we get the TCE address. The 'lev' var
is an int32_t that is being initiliazed by the GETFIELD() macro, which
returns an uint64_t.
For a human reader this means that 'lev' will always be positive or zero.
But some compilers may beg to differ. 'lev' being an int32_t can in theory
be set as negative, and the "while ((lev--) >= 0)" loop might never be
reached, and 'taddr' will be left unitialized. This can cause phb3_error()
to use 'taddr' uninitialized down below:
if ((is_write & !(tce & 2)) || ((!is_write) && !(tce & 1))) {
phb3_error(phb, "TCE access fault at 0x%"PRIx64, taddr);
A quick way of fixing it is to use a do/while() loop. This will keep the
same semanting as the existing while() loop does and the compiler will
understand that 'taddr' will be initialized at least once.
Suggested-by: Matheus K. Ferst <matheus.ferst@eldorado.org.br>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/573
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220127122234.842145-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
If an iommu page has wrong permissions, an error message is displayed,
but the access is allowed, which is odd. This patch fixes it.
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220121152350.381685-1-fbarrat@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Grab the PHB version from the PEC class directly when needed.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220117122753.1655504-4-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
PHB5 will introduce its own root port model. Prepare ground for it.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220117122753.1655504-3-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The root port device is currently created and attached to the PHB
early in pnv_phb4_realize(). Do it under pnv_pec_default_phb_realize()
after the PHB is fully realized. It's cleaner and avoids an extra
test on defaults_enabled().
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220117122753.1655504-2-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This function does not use 'stack' anymore. Rename it to
pnv_pec_phb_update_map().
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220114180719.52117-9-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
All the complexity that was scattered between PnvPhb4PecStack and
PnvPHB4 are now centered in the PnvPHB4 device. PnvPhb4PecStack does not
serve any purpose in the current code base.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220114180719.52117-8-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This patch changes the design of the PEC device to create and realize PHB4s
instead of PecStacks. After all the recent changes, PHB4s now contain all
the information needed for their proper functioning, not relying on PecStack
in any capacity.
All changes are being made in a single patch to avoid renaming parts of
the PecState and leaving the code in a strange way. E.g. rename
PecClass->num_stacks to num_phbs, which would then read a
pnv_pec_num_stacks[] array. To avoid mixing the old and new design more
than necessary it's clearer to do these changes in a single step.
The name changes made are:
- in PnvPhb4PecState:
* rename 'num_stacks' to 'num_phbs'
* remove the pec->stacks[] array. Current code relies on the
pec->stacks[] obj acting as a simple container, without ever accessing
pec->stacks[] for any other purpose. Instead of converting this into a
pec->phbs[] array, remove it
- in PnvPhb4PecClass, rename *num_stacks to *num_phbs;
- pnv_pec_num_stacks[] is renamed to pnv_pec_num_phbs[].
The logical changes:
- pnv_pec_default_phb_realize():
* init and set the properties of the PnvPHB4 qdev
* do not use stack->phb anymore;
- pnv_pec_realize():
* use the new default_phb_realize() to init/realize each PHB if
running with defaults;
- pnv_pec_instance_init(): removed since we're creating the PHBs during
pec_realize();
- pnv_phb4_get_stack():
* renamed to pnv_phb4_get_pec() and returns a PnvPhb4PecState*;
- pnv_phb4_realize(): use 'phb->pec' instead of 'stack'.
This design change shouldn't caused any behavioral change in the runtime
of the machine.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220114180719.52117-7-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
