As a rule we prefer to pass PowerPCCPU instead of CPUPPCState, and this
change will make some things simpler later on.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
The ISA serial port handling in serial-isa.c imposes a limit
of 4 serial ports. This is because we only know of 4 IO port
and IRQ settings for them, and is unrelated to the generic
MAX_SERIAL_PORTS limit, though they happen to both be set at
4 currently.
Use a new MAX_ISA_SERIAL_PORTS wherever that is the correct
limit to be checking against.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180420145249.32435-11-peter.maydell@linaro.org
When skiboot starts, it first clears the CPU structs for all possible
CPUs on a system :
for (i = 0; i <= cpu_max_pir; i++)
memset(&cpu_stacks[i].cpu, 0, sizeof(struct cpu_thread));
On POWER9, cpu_max_pir is quite big, 0x7fff, and the skiboot cpu_stacks
array overlaps with the memory region in which QEMU maps the initramfs
file. Move it upwards in memory to keep it safe.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The XSCOM base address of the core chiplet was wrongly calculated. Use
the OPAL macros to fix that and do a couple of renames.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When addressed by XSCOM, the first core has the 0x20 chiplet ID but
the CPU PIR can start at 0x0.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
commit 1ed9c8af50 ("target/ppc: Add POWER9 DD2.0 model information")
deprecated the POWER9 model v1.0.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The 'pnv' prefix is now used for all and the routines populating the
device tree start with 'pnv_dt'. The handler of the PnvXScomInterface
is also renamed to 'dt_xscom' which should reflect that it is
populating the device tree under the 'xscom@' node of the chip.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Use a new DEFINE_TYPES() helper to simplify type registration
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
deduce core type directly from chip type instead of
maintaining type mapping in PnvChipClass::cpu_model.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
typically for cpus/core type names following convention is used
new_type_prefix-superclass_typename
make PNV core/chip to follow common convention.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
use common cpu_model prasing in vl.c and set default cpu_model
using generic MachineClass::default_cpu_type.
Beside of switching to generic infrastructure it solves several
issues.
* ppc_cpu_class_by_name() is used to deal with lower/upper case
and alias translations into actual cpu type, which fixes
'-M powernv -cpu power8' and '-M powernv -cpu power9_v1.0'
usecases which error out with:
'invalid CPU model 'FOO' for powernv machine'
* allows to switch to lower-case typenames in pnv chip/core name
(by convention typnames should be lower-case)
* replace aliased names /power8, power9, .../ with exact cpu model
names (i.e. typenames should be stable but aliases might decide to
point to other cpu model withi family or changed by kvm). It will
also help to simplify pnv_chip/core code and get rid of dependency
on cpu_model parsing.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
[dwg: Updated to make DD2.0 as default POWER9 chip]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The offset of the root node is guaranteed to be 0.
This doesn't fix anything, it's just trivial cleanup of the two
remaining places where this was done under hw/ppc.
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
and exit before uselessly trying to load it if the file does not
exists.
Issue discovered by Coverity Scan.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Convert all uses of error_report("warning:"... to use warn_report()
instead. This helps standardise on a single method of printing warnings
to the user.
All of the warnings were changed using these two commands:
find ./* -type f -exec sed -i \
's|error_report(".*warning[,:] |warn_report("|Ig' {} +
Indentation fixed up manually afterwards.
The test-qdev-global-props test case was manually updated to ensure that
this patch passes make check (as the test cases are case sensitive).
Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Suggested-by: Thomas Huth <thuth@redhat.com>
Cc: Jeff Cody <jcody@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Lieven <pl@kamp.de>
Cc: Josh Durgin <jdurgin@redhat.com>
Cc: "Richard W.M. Jones" <rjones@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Greg Kurz <groug@kaod.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Peter Chubb <peter.chubb@nicta.com.au>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Alexander Graf <agraf@suse.de>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Greg Kurz <groug@kaod.org>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed by: Peter Chubb <peter.chubb@data61.csiro.au>
Acked-by: Max Reitz <mreitz@redhat.com>
Acked-by: Marcel Apfelbaum <marcel@redhat.com>
Message-Id: <e1cfa2cd47087c248dd24caca9c33d9af0c499b0.1499866456.git.alistair.francis@xilinx.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Use the actual unsigned integer type name.
The type name change impacts the following externally visible area:
* vl.c's machine_help_func() puts it in help for -machine NAME,help.
* QMP command qom-list exposes it in ObjectPropertyInfo member @type.
* QMP command device-list-properties exposes it in DevicePropertyInfo
member @type.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170607163635.17635-15-marcandre.lureau@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This pull request supersedes the one from yesterday (20170510), fixing
an important style bug in one patch, and adding an extra couple of
simple patches.
Highlights of this set:
* Some fixes for POWER9
* TCG support for POWER9 radix MMU
* VGA rom for Mac machine types
* Fixes for the XICS interrupt controller
* MTTCG support for ppc targets
As suggested by Paolo, I've tried to add the Docker tests to my
standard pre-pull-request tests. I haven't wholly suceeded; this has
been tested with some of the Docker images, but others I haven't
managed due to problems that as best I can tell are not due to
problems in this patch series. I'll continue working on this for
future pull requests. Specifically, 'travis', 'fedora', and 'centos6'
seem to work. 'min-glib' jammed while gtesting moxie, which seems
very unlikely to be caused by this series. 'ubuntu', 'debian' and
'debian-bootstrap' hit build errors almost immediately that look like
problems with the container configuration, and 'debian-*-cross' hit
build errors later on which also look like missing dependencies from
the container.
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Merge remote-tracking branch 'dgibson/tags/ppc-for-2.10-20170511' into staging
ppc patch queue for 2017-05-11
This pull request supersedes the one from yesterday (20170510), fixing
an important style bug in one patch, and adding an extra couple of
simple patches.
Highlights of this set:
* Some fixes for POWER9
* TCG support for POWER9 radix MMU
* VGA rom for Mac machine types
* Fixes for the XICS interrupt controller
* MTTCG support for ppc targets
As suggested by Paolo, I've tried to add the Docker tests to my
standard pre-pull-request tests. I haven't wholly suceeded; this has
been tested with some of the Docker images, but others I haven't
managed due to problems that as best I can tell are not due to
problems in this patch series. I'll continue working on this for
future pull requests. Specifically, 'travis', 'fedora', and 'centos6'
seem to work. 'min-glib' jammed while gtesting moxie, which seems
very unlikely to be caused by this series. 'ubuntu', 'debian' and
'debian-bootstrap' hit build errors almost immediately that look like
problems with the container configuration, and 'debian-*-cross' hit
build errors later on which also look like missing dependencies from
the container.
# gpg: Signature made Thu 11 May 2017 05:13:46 AM BST
# gpg: using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg: aka "David Gibson (kernel.org) <dwg@kernel.org>"
# gpg: aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg: aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E 87DC 6C38 CACA 20D9 B392
* dgibson/tags/ppc-for-2.10-20170511: (23 commits)
target/ppc: Avoid printing wrong aliases in CPU help text
pnv: Fix build failures on some host platforms
target/ppc: Allow workarounds for POWER9 DD1
spapr: Don't accidentally advertise HTM support on POWER9
ppc: xics: fix compilation with CentOS 6
target/ppc: Enable RADIX mmu mode for pseries TCG guest
target/ppc: Implement ISA V3.00 radix page fault handler
target/ppc: Change tlbie invalid fields for POWER9 support
target/ppc: Update tlbie to check privilege level based on GTSE
target/ppc: Set UPRT and GTSE on all cpus in H_REGISTER_PROCESS_TABLE
ppc: add qemu_vga.ndrv ROM to fw_cfg interface for NewWorld Macs
ppc: add qemu_vga.ndrv ROM to fw_cfg interface for OldWorld Macs
Add QemuMacDrivers qemu_vga.ndrv revision d4e7d7a built as submodule
Add QemuMacDrivers as submodule
ppc/xics: preserve P and Q bits for KVM IRQs
ppc/xics: Fix stale irq->status bits after get
target/ppc: do not reset reserve_addr in exec_enter
tcg: enable MTTCG by default for PPC64 on x86
cpus: Fix CPU unplug for MTTCG
target/ppc: Generate fence operations
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Today, when a PowerNV guest runs, it uses the sensor definitions of
the BMC simulator to populate the device tree. But an external IPMI
BMC could also be used and, in that case, it is not (yet) possible to
retrieve the sensor list. Generating the OEM SEL event for shutdown or
reboot also does not make sense as it should be generated on the BMC
side.
This change allows a guest to use an 'ipmi-bmc-extern' backend to the
'isa-ipmi-bt' device and a 'chardev' for transport such as :
-chardev socket,id=ipmi0,host=localhost,port=9002,reconnect=10 \
-device ipmi-bmc-extern,id=bmc0,chardev=ipmi0 \
-device isa-ipmi-bt,bmc=bmc0,irq=10
and connect to a BMC simulator, the OpenIPMI ipmi_sim simulator for
instance.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch removes redundant "qemu:" from error functions. The link to the bitesized task is:
http://wiki.qemu-project.org/Contribute/BiteSizedTasks#Error_checking
Signed-off-by: Ishani Chugh <chugh.ishani@research.iiit.ac.in>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
OpenPOWER systems expect to be notified with such an event before a
shutdown or a reboot. An OEM SEL message is sent with specific
identifiers and a user data containing the request : OFF or REBOOT.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Skiboot, the firmware for the PowerNV platform, expects the BMC to
provide some specific IPMI sensors. These sensors are exposed in the
device tree and their values are updated by the firmware at boot time.
Sensors of interest are :
"FW Boot Progress"
"Boot Count"
As such a device is defined on the command line, we can only detect
its presence at reset time.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When an ipmi-bt device [1] is defined on the ISA bus, we need to
populate the device tree with the object properties. Such devices are
created with the command line options :
-device ipmi-bmc-sim,id=bmc0 -device isa-ipmi-bt,bmc=bmc0,irq=10
[1] https://lists.gnu.org/archive/html/qemu-devel/2015-11/msg03168.html
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The code could be common to any ISA device but we are missing the IO
length.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This is an empty shell that we will use to include nodes in the device
tree for ISA devices. We expect RTC, UART and IPMI BT devices.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The default LPC bus of a multichip system is on chip 0. It's
recognized by the firmware (skiboot) using a "primary" property in the
device tree.
We introduce a pnv_chip_lpc_offset() routine to locate the LPC node of
a chip and set the property directly from the machine level.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
It adds the Naples chip which supports proper LPC interrupts via the
LPC controller rather than via an external CPLD.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: - updated for qemu-2.9
- ported on latest PowerNV patchset
- moved the IRQ handler in pnv_lpc.c
- introduced pnv_lpc_isa_irq_create() to create the ISA IRQs ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The OCC is an on-chip microcontroller based on a ppc405 core used
for various power management tasks. It comes with a pile of additional
hardware sitting on the PIB (aka XSCOM bus). At this point we don't
emulate it (nor plan to do so). However there is one facility which
is provided by the surrounding hardware that we do need, which is the
interrupt generation facility. OPAL uses it to send itself interrupts
under some circumstances and there are other uses around the corner.
So this implement just enough to support this.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: - updated for qemu-2.9
- changed the XSCOM interface to fit new model
- QOMified the model ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The Processor Service Interface (PSI) Controller is one of the engines
of the "Bridge" unit which connects the different interfaces to the
Power Processor.
This adds just enough of the PSI bridge to handle various on-chip and
the one external interrupt. The rest of PSI has to do with the link to
the IBM FSP service processor which we don't plan to emulate (not used
on OpenPower machines).
The ics_get() and ics_resend() handlers of the XICSFabric interface of
the PowerNV machine are now defined to handle the Interrupt Control
Source of PSI. The InterruptStatsProvider interface is also modified
to dump the new ICS.
Originally from Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This provides to a PowerNV chip (POWER8) access to the Interrupt
Management area, which contains the registers of the Interrupt Control
Presenters of each thread. These are used to accept, return, forward
interrupts in the system.
This area is modeled with a per-chip container memory region holding
all the ICP registers. Each thread of a chip is then associated with
its ICP registers using a memory subregion indexed by its PIR number
in the overall region.
The device tree is populated accordingly.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Each thread of a core is linked to an ICP. This allocates a PnvICPState
object before the PowerPCCPU object is realized and lets the XICSFabric
do the store under the 'intc' backlink when xics_cpu_setup() is
called.
This modeling removes the need of maintaining an array of ICP objects
under the PowerNV machine and also simplifies the XICSFabric icp_get()
handler.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
A XICSFabric QOM interface is used by the XICS layer to manipulate the
ICP and ICS objects. Let's define the associated handlers for the
PowerNV machine. All handlers should be defined even if there is no
ICS under the PowerNV machine yet.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The devices that are derived from TYPE_PNV_CHIP currently show up
as "uncategorized" devices in the help text of "-device ?". Since
they obviously are related to the CPU, let's put them into the
CPU category instead.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This dependency is the wrong way, and we will need util/qemu-timer.h from
sysemu/cpus.h in the next patch.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
error_report() already puts a prefix with the program name in front
of the error strings, so the "qemu:" prefix is not necessary here
anymore.
Reported-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
hw_error() is for CPU related errors only (it dumps the CPU registers
and calls abort()!), so using error_report() is the better choice
of reporting an error in case we simply did not find a file.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.
Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part]
Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part]
Acked-by: Michael Walle <michael@walle.cc> [lm32 part]
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part]
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part]
Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part]
Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part]
Acked-by: Richard Henderson <rth@twiddle.net> [alpha part]
Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part]
Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part]
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [crisµblaze part]
Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part]
Signed-off-by: Thomas Huth <thuth@redhat.com>
If the pnv machine type is compiled on a 32-bit host, the unsigned long
(host) type is 32-bit. This means that the hweight_long() used to
calculate the number of allowed cores only considers the low 32 bits of
the cores_mask variable, and can thus return 0 in some circumstances.
This corrects the bug.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Suggested-by: Richard Henderson <rth@twiddle.net>
[clg: replaced hweight_long() by ctpop64() ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The XSCOM addresses for the core registers are encoded in a slightly
different way on POWER8 and POWER9.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
powernv has some code (derived from the spapr equivalent) used in device
tree generation which depends on the CPU's compatibility mode / logical
PVR. However, compatibility modes don't make sense on powernv - at least
not as a property controlled by the host - because the guest in powernv
has full hypervisor level access to the virtual system, and so owns the
PCR (Processor Compatibility Register) which implements compatiblity modes.
Note: the new logic doesn't take into account kvmppc_smt_threads() like the
old version did. However, if core->nr_threads exceeds kvmppc_smt_threads()
then things will already be broken and clamping the value in the device
tree isn't going to save us.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
As Qemu only supports a single instance of the ISA bus, we use the LPC
controller of chip 0 to create one and plug in a couple of useful
devices, like an UART and RTC. An IPMI BT device, which is also an ISA
device, can be defined on the command line to connect an external BMC.
That is for later.
The PowerNV machine now has a console. Skiboot should load a kernel
and jump into it but execution will stop quite early because we lack a
model for the native XICS controller for the moment :
[ 0.000000] NR_IRQS:512 nr_irqs:512 16
[ 0.000000] XICS: Cannot find a Presentation Controller !
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at arch/powerpc/platforms/powernv/setup.c:81
...
[ 0.000000] NIP [c00000000079d65c] pnv_init_IRQ+0x30/0x44
You can still do a few things under xmon.
Based on previous work from :
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
[dwg: Trivial fix for a change in the serial_hds_isa_init() interface]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The LPC (Low Pin Count) interface on a POWER8 is made accessible to
the system through the ADU (XSCOM interface). This interface is part
of set of units connected together via a local OPB (On-Chip Peripheral
Bus) which act as a bridge between the ADU and the off chip LPC
endpoints, like external flash modules.
The most important units of this OPB are :
- OPB Master: contains the ADU slave logic, a set of internal
registers and the logic to control the OPB.
- LPCHC (LPC HOST Controller): which implements a OPB Slave, a set of
internal registers and the LPC HOST Controller to control the LPC
interface.
Four address spaces are provided to the ADU :
- LPC Bus Firmware Memory
- LPC Bus Memory
- LPC Bus I/O (ISA bus)
- and the registers for the OPB Master and the LPC Host Controller
On POWER8, an intermediate hop is necessary to reach the OPB, through
a unit called the ECCB. OPB commands are simply mangled in ECCB write
commands.
On POWER9, the OPB master address space can be accessed via MMIO. The
logic is same but the code will be simpler as the XSCOM and ECCB hops
are not necessary anymore.
This version of the LPC controller model doesn't yet implement support
for the SerIRQ deserializer present in the Naples version of the chip
though some preliminary work is there.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: - updated for qemu-2.7
- ported on latest PowerNV patchset
- changed the XSCOM interface to fit new model
- QOMified the model
- moved the ISA hunks in another patch
- removed printf logging
- added a couple of UNIMP logging
- rewrote commit log ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Now that we are using real HW ids for the cores in PowerNV chips, we
can route the XSCOM accesses to them. We just need to attach a
specific XSCOM memory region to each core in the appropriate window
for the core number.
To start with, let's install the DTS (Digital Thermal Sensor) handlers
which should return 38°C for each core.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
On a real POWER8 system, the Pervasive Interconnect Bus (PIB) serves
as a backbone to connect different units of the system. The host
firmware connects to the PIB through a bridge unit, the
Alter-Display-Unit (ADU), which gives him access to all the chiplets
on the PCB network (Pervasive Connect Bus), the PIB acting as the root
of this network.
XSCOM (serial communication) is the interface to the sideband bus
provided by the POWER8 pervasive unit to read and write to chiplets
resources. This is needed by the host firmware, OPAL and to a lesser
extent, Linux. This is among others how the PCI Host bridges get
configured at boot or how the LPC bus is accessed.
To represent the ADU of a real system, we introduce a specific
AddressSpace to dispatch XSCOM accesses to the targeted chiplets. The
translation of an XSCOM address into a PCB register address is
slightly different between the P9 and the P8. This is handled before
the dispatch using a 8byte alignment for all.
To customize the device tree, a QOM InterfaceClass, PnvXScomInterface,
is provided with a populate() handler. The chip populates the device
tree by simply looping on its children. Therefore, each model needing
custom nodes should not forget to declare itself as a child at
instantiation time.
Based on previous work done by :
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
[dwg: Added cpu parameter to xscom_complete()]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This is largy inspired by sPAPRCPUCore with some simplification, no
hotplug for instance. A set of PnvCore objects is added to the PnvChip
and the device tree is populated looping on these cores.
Real HW cpu ids are now generated depending on the chip cpu model, the
chip id and a core mask. The id is propagated to the CPU object, using
properties, to set the SPR_PIR (Processor Identification Register)
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The Processor Identification Register (PIR) is a register that holds a
processor identifier which is used for bus transactions (XSCOM) and
for processor differentiation in multiprocessor systems. It also used
in the interrupt vector entries (IVE) to identify the thread serving
the interrupts.
P9 and P8 have some differences in the CPU PIR encoding.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This will be used to build real HW ids for the cores and enforce some
limits on the available cores per chip.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This is is an abstraction of a POWER8 chip which is a set of cores
plus other 'units', like the pervasive unit, the interrupt controller,
the memory controller, the on-chip microcontroller, etc. The whole can
be seen as a socket. It depends on a cpu model and its characteristics:
max cores and specific inits are defined in a PnvChipClass.
We start with an near empty PnvChip with only a few cpu constants
which we will grow in the subsequent patches with the controllers
required to run the system.
The Chip CFAM (Common FRU Access Module) ID gives the model of the
chip and its version number. It is generally the first thing firmwares
fetch, available at XSCOM PCB address 0xf000f, to start initialization.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The goal is to emulate a PowerNV system at the level of the skiboot
firmware, which loads the OS and provides some runtime services. Power
Systems have a lower firmware (HostBoot) that does low level system
initialization, like DRAM training. This is beyond the scope of what
qemu will address in a PowerNV guest.
No devices yet, not even an interrupt controller. Just to get started,
some RAM to load the skiboot firmware, the kernel and initrd. The
device tree is fully created in the machine reset op.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: - updated for qemu-2.7
- replaced fprintf by error_report
- used a common definition of _FDT macro
- removed VMStateDescription as migration is not yet supported
- added IBM Copyright statements
- reworked kernel_filename handling
- merged PnvSystem and sPowerNVMachineState
- removed PHANDLE_XICP
- added ppc_create_page_sizes_prop helper
- removed nmi support
- removed kvm support
- updated powernv machine to version 2.8
- removed chips and cpus, They will be provided in another patches
- added a machine reset routine to initialize the device tree (also)
- french has a squelette and english a skeleton.
- improved commit log.
- reworked prototypes parameters
- added a check on the ram size (thanks to Michael Ellerman)
- fixed chip-id cell
- changed MAX_CPUS to 2048
- simplified memory node creation to one node only
- removed machine version
- rewrote the device tree creation with the fdt "rw" routines
- s/sPowerNVMachineState/PnvMachineState/
- etc.]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
