Eliminate redundant and incorrect booke206_page_size_to_tlb function
from ppce500_spin.c in preference to previously existing but newly
exported definition from e500.c
Defect analysis:
The booke206_page_size_to_tlb function in e500.c was updated in commit
2bd9543 "ppc: booke206: use MAV=2.0 TSIZE definition, fix 4G pages" to
reflect a change in the definition of MAS1_TSIZE_SHIFT from 8
(corresponding to a min TLB page size of 4kb) to a value of 7 (TLB
page size 2k). The booke206_page_size_to_tlb() function defined in
ppce500_spin.c was never updated to reflect the change in
MAS1_TSIZE_SHIFT.
In http://lists.nongnu.org/archive/html/qemu-ppc/2016-06/msg00533.html,
Scott Wood suggested this "root cause" explanation:
SW> The patch that changed MAS1_TSIZE_SHIFT from 8 to 7 was around the
SW> same time as the patch that added this code, which is probably why
SW> adjusting it got missed. Commit 2bd9543cd3 did update the
SW> equivalent code in ppce500_mpc8544ds.c, which now resides in
SW> hw/ppc/e500.c and has been changed to not assume a power-of-2
SW> size. The ppce500_spin version should be eliminated.
Signed-off-by: Aaron Larson <alarson@ddci.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the
Error typedef. Since then, we've moved to include qemu/osdep.h
everywhere. Its file comment explains: "To avoid getting into
possible circular include dependencies, this file should not include
any other QEMU headers, with the exceptions of config-host.h,
compiler.h, os-posix.h and os-win32.h, all of which are doing a
similar job to this file and are under similar constraints."
qapi/error.h doesn't do a similar job, and it doesn't adhere to
similar constraints: it includes qapi-types.h. That's in excess of
100KiB of crap most .c files don't actually need.
Add the typedef to qemu/typedefs.h, and include that instead of
qapi/error.h. Include qapi/error.h in .c files that need it and don't
get it now. Include qapi-types.h in qom/object.h for uint16List.
Update scripts/clean-includes accordingly. Update it further to match
reality: replace config.h by config-target.h, add sysemu/os-posix.h,
sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h
comment quoted above similarly.
This reduces the number of objects depending on qapi/error.h from "all
of them" to less than a third. Unfortunately, the number depending on
qapi-types.h shrinks only a little. More work is needed for that one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
[Fix compilation without the spice devel packages. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Some CPUs are of an opposite data-endianness to other components in the
system. Sometimes elfs have the data sections layed out with this CPU
data-endianness accounting for when loaded via the CPU, so byte swaps
(relative to other system components) will occur.
The leading example, is ARM's BE32 mode, which is is basically LE with
address manipulation on half-word and byte accesses to access the
hw/byte reversed address. This means that word data is invariant
across LE and BE32. This also means that instructions are still LE.
The expectation is that the elf will be loaded via the CPU in this
endianness scheme, which means the data in the elf is reversed at
compile time.
As QEMU loads via the system memory directly, rather than the CPU, we
need a mechanism to reverse elf data endianness to implement this
possibility.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.
This commit was created with scripts/clean-includes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1453832250-766-6-git-send-email-peter.maydell@linaro.org
Done with this Coccinelle semantic patch
@@
expression FMT, E, S;
expression list ARGS;
@@
- error_report(FMT, ARGS, error_get_pretty(E));
+ error_reportf_err(E, FMT/*@@@*/, ARGS);
(
- error_free(E);
|
exit(S);
|
abort();
)
followed by a replace of '%s"/*@@@*/' by '"' and some line rewrapping,
because I can't figure out how to make Coccinelle transform strings.
We now use the error whole instead of just its message obtained with
error_get_pretty(). This avoids suppressing its hint (see commit
50b7b00), but I can't see how the errors touched in this commit could
come with hints.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1450452927-8346-12-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Rename ELF_MACHINE to be PPC specific. This is used as-is by the
various PPC bootloaders and is locally defined to ELF_MACHINE in linux
user in PPC specific ifdeffery.
This removes another architecture specific definition from the global
namespace (as desired by multi-arch).
Cc: Alexander Graf <agraf@suse.de>
Cc: qemu-ppc@nongnu.org
Reviewed-by: Richard Henderson <rth@twiddle.net>
Acked-By: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
QEMU does have an I/O thread now, that can be interrupted at any time
because the VCPU thread runs outside the iothread mutex.
Therefore, the kvmppc_timer_hack is obsolete. Remove it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Running
x86_64-softmmu/qemu-system-x86_64 -machine pc,kernel_irqchip=on -enable-kvm
leads to crash:
qemu-system-x86_64: qemu/util/qemu-option.c:387: qemu_opt_get_bool_helper:
Assertion `opt->desc && opt->desc->type == QEMU_OPT_BOOL' failed. Aborted
(core dumped)
This happens because the commit e79d5a6 ("machine: remove qemu_machine_opts
global list") removed the global option descriptions and moved them to
MachineState's QOM properties.
Fix this by querying machine properties through designated wrappers.
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
We call ppce500_init_mpic_kvm() to create a "kvm-openpic". If it
fails, we call ppce500_init_mpic_qemu() to fall back to plain
"openpic".
ppce500_init_mpic_kvm() uses qdev_init(). qdev_init()'s error
handling has an unwanted side effect: it calls qerror_report_err(),
which prints to stderr. Looks like an error, but isn't.
In QMP context, it would stash the error in the monitor instead,
making the QMP command fail. Fortunately, it's only called from board
initialization, never in QMP context.
Clean up by cutting out the qdev_init() middle-man: set property
"realized" directly.
While there, improve the error message when we can't satisfy an
explicit user request for "kvm-openpic", and exit(1) instead of
abort().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
The GPIO controller lives at IRQ 47, not 43 on real hardware. This is a problem
because IRQ 43 is occupied by the I2C controller which we want to implement
next, so we'd have a conflict on that IRQ number.
Move the GPIO controller to IRQ 47 where it belongs.
Signed-off-by: Amit Singh Tomar <amit.tomar@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
The e500 PCI controller has configurable windows that allow a guest OS
to selectively map parts of the PCI bus space to CPU address space and
to selectively map parts of the CPU address space for DMA requests into
PCI visible address ranges.
So far, we've simply assumed that this mapping is 1:1 and ignored it.
However, the PCICSRBAR (CCSR mapped in PCI bus space) always has to live
inside the first 32bits of address space. This means if we always treat
all mappings as 1:1, this map will collide with our RAM map from the CPU's
point of view.
So this patch adds proper ATMU support which allows us to keep the PCICSRBAR
below 32bits local to the PCI bus and have another, different window to PCI
BARs at the upper end of address space. We leverage this on e500plat though,
mpc8544ds stays virtually 1:1 like it was before, but now also goes via ATMU.
With this patch, I can run guests with lots of RAM and not coincidently access
MSI-X mappings while I really want to access RAM.
Signed-off-by: Alexander Graf <agraf@suse.de>
We want to have different MMIO region offsets for the mpc8544ds machine
and our e500 PV machine, so move the definitions of those into the machine
specific params struct.
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds support to expose eTSEC devices in the dynamically created
guest facing device tree. This allows us to expose eTSEC devices into guests
without changes in the machine file.
Because we can now tell the guest about eTSEC devices this patch allows the
user to specify eTSEC devices via -device at all.
Signed-off-by: Alexander Graf <agraf@suse.de>
For e500 our approach to supporting dynamically spawned sysbus devices is to
create a simple bus from the guest's point of view within which we map those
devices dynamically.
We allocate memory regions always within the "platform" hole in address
space and map IRQs to predetermined IRQ lines that are reserved for platform
device usage.
This maps really nicely into device tree logic, so we can just tell the
guest about our virtual simple bus in device tree as well.
Signed-off-by: Alexander Graf <agraf@suse.de>
Now that we have a working GPIO controller on the virt machine, we can use
one pin to notify QEMU that the guests wants to power off the system.
Signed-off-by: Alexander Graf <agraf@suse.de>
With the e500 virt machine, we don't have to adhere to the exact hardware
layout of an mpc8544ds board. So there we can just add a qoriq compatible
GPIO controller into the system that we can add a power off hook to.
Signed-off-by: Alexander Graf <agraf@suse.de>
Such address translation is needed when load address recorded in uImage
is a virtual address. When the actual load address is requested, return
untranslated address: user that needs the translated address can always
apply translation function to it and those that need it untranslated
don't need to do the inverse translation.
Add translation function pointer and its parameter to uimage_load
prototype. Update all existing users.
No user-visible functional changes.
Cc: qemu-stable@nongnu.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
To indicate the IRQs are initially disconnected.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Commit 0b183fc871:"memory: move mem_path handling to
memory_region_allocate_system_memory" split memory_region_init_ram and
memory_region_init_ram_from_file. Also it moved mem-path handling a step
up from memory_region_init_ram to memory_region_allocate_system_memory.
Therefore for any board that uses memory_region_init_ram directly,
-mem-path is not supported.
Fix this by replacing memory_region_init_ram with
memory_region_allocate_system_memory.
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
When the user specifies -nodefaults he can tell us that he doesn't want any
serial ports spawned by default. While we do honor that wish, we still create
device tree entries for those non-existent devices.
Make device tree generation depend on whether the device is actually available.
Signed-off-by: Alexander Graf <agraf@suse.de>
Almost all platforms QEMU emulates have some sort of firmware they can load
to expose a guest environment that closely resembles the way it would look
like on real hardware.
This patch introduces such a firmware on our e500 platforms. U-boot is the
default firmware for most of these systems and as such our preferred choice.
For backwards compatibility reasons (and speed and simplicity) we skip u-boot
when you use -kernel and don't pass in -bios. For all other combinations like
-kernel and -bios or no -kernel you get u-boot as firmware.
This allows you to modify the boot environment, execute a networked boot through
the e1000 emulation and execute u-boot payloads.
Signed-off-by: Alexander Graf <agraf@suse.de>
We want to move to a model where firmware loads our kernel. To achieve
this we need to be able to tell firmware where the kernel lies.
Let's copy the mechanism we already use for -M pseries and expose the
kernel load address and size through the device tree.
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch adds pci pin to irq_num routing callback.
This callback is called from pci_device_route_intx_to_irq to
find which pci device maps to which irq.
This fix is required for pci-device passthrough using vfio.
Also without this patch we gets below prints
"
PCI: Bug - unimplemented PCI INTx routing (e500-pcihost)
qemu-system-ppc64: PCI: Bug - unimplemented PCI INTx routing (e500-pcihost) "
and Legacy interrupt does not work with pci device passthrough.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
[agraf: remove double semicolon]
Signed-off-by: Alexander Graf <agraf@suse.de>
- Use PCI_NUM_PINS rather than hardcoding
- use "pin" wherever possible
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Total removal of QEMUMachineInitArgs struct. QEMUMachineInitArgs's fields
are copied into MachineState. Removed duplicated fields from MachineState.
All the other changes are only mechanical refactoring, no semantic changes.
Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> (s390)
Reviewed-by: Michael S. Tsirkin <mst@redhat.com> (PC)
[AF: Renamed ms -> machine, use MACHINE_GET_CLASS()]
Signed-off-by: Andreas Färber <afaerber@suse.de>
We now reset SPRs to their reset values on CPU reset. So if we want
to have an SPR persistently changed, we need to change its default
reset value rather than the value itself manually.
Do this for SPR_BOOKE_PIR, fixing e500v2 SMP boot.
Reported-by: Frederic Konrad <fred.konrad@greensocs.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Tested-by: KONRAD Frederic <fred.konrad@greensocs.com>
This makes use of @cpu_dt_id and related API in:
1. emulated XICS hypercall handlers as they receive fixed CPU indexes;
2. XICS-KVM to enable in-kernel XICS on right CPU;
3. device-tree renderer.
This removes @cpu_index fixup as @cpu_dt_id is used instead so QEMU monitor
can accept command-line CPU indexes again.
This changes kvm_arch_vcpu_id() to use ppc_get_vcpu_dt_id() as at the moment
KVM CPU id and device tree ID are calculated using the same algorithm.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Mike Day <ncmike@ncultra.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
The qemu_devtree API is a wrapper around the fdt_ set of APIs.
Rename accordingly.
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
[agraf: also convert hw/arm/virt.c]
Signed-off-by: Alexander Graf <agraf@suse.de>
Today we generate the device tree once on machine initialization and then
store the finalized blob in memory to reload it on reset.
This is bad for 2 reasons. First we potentially waste a bunch of RAM for no
good reason, as we have all information required to regenerate the device
tree available anyways.
The second reason is even more important. On machine init when we generate
the device tree for the first time, we don't have all of the devices fully
initialized yet. But the device tree needs to potentially walk devices to
put information about them into the device tree.
Move the generation into a reset function. That way we just generate it new
every time we reset, solving both of the above issues.
Signed-off-by: Alexander Graf <agraf@suse.de>
Pass on the generic arguments unadulterated, and the machine-specific
ones as separate argument.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Move next_cpu from CPU_COMMON to CPUState.
Move first_cpu variable to qom/cpu.h.
gdbstub needs to use CPUState::env_ptr for now.
cpu_copy() no longer needs to save and restore cpu_next.
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
[AF: Rebased, simplified cpu_copy()]
Signed-off-by: Andreas Färber <afaerber@suse.de>
The previous two commits fixed bugs in -machine option queries. I
can't find fault with the remaining queries, but let's use
qemu_get_machine_opts() everywhere, for consistency, simplicity and
robustness.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1372943363-24081-7-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Multiple -machine options with the same ID are merged. All but the
one without an ID are to be silently ignored.
In most places, we query these options with a null ID. This is
correct.
In some places, we instead query whatever options come first in the
list. This is wrong. When the -machine processed first happens to
have an ID, options are taken from that ID, and the ones specified
without ID are silently ignored.
Example:
$ upstream-qemu -nodefaults -S -display none -monitor stdio -machine id=foo -machine accel=kvm,usb=on
$ upstream-qemu -nodefaults -S -display none -monitor stdio -machine id=foo,accel=kvm,usb=on -machine accel=xen
$ upstream-qemu -nodefaults -S -display none -monitor stdio -machine accel=xen -machine id=foo,accel=kvm,usb=on
$ qemu-system-x86_64 -nodefaults -S -display none -monitor stdio -machine accel=kvm,usb=on
QEMU 1.5.50 monitor - type 'help' for more information
(qemu) info kvm
kvm support: enabled
(qemu) info usb
(qemu) q
$ qemu-system-x86_64 -nodefaults -S -display none -monitor stdio -machine id=foo -machine accel=kvm,usb=on
QEMU 1.5.50 monitor - type 'help' for more information
(qemu) info kvm
kvm support: disabled
(qemu) info usb
(qemu) q
$ qemu-system-x86_64 -nodefaults -S -display none -monitor stdio -machine id=foo,accel=kvm,usb=on -machine accel=xen
QEMU 1.5.50 monitor - type 'help' for more information
(qemu) info kvm
kvm support: enabled
(qemu) info usb
USB support not enabled
(qemu) q
$ qemu-system-x86_64 -nodefaults -S -display none -monitor stdio -machine accel=xen -machine id=foo,accel=kvm,usb=on
xc: error: Could not obtain handle on privileged command interface (2 = No such file or directory): Internal error
xen be core: can't open xen interface
failed to initialize Xen: Operation not permitted
Option usb is queried correctly, and the one without an ID wins,
regardless of option order.
Option accel is queried incorrectly, and which one wins depends on
option order and ID.
Affected options are accel (and its sugared forms -enable-kvm and
-no-kvm), kernel_irqchip, kvm_shadow_mem.
Additionally, option kernel_irqchip is normally on by default, except
it's off when no -machine options are given. Bug can't bite, because
kernel_irqchip is used only when KVM is enabled, KVM is off by
default, and enabling always creates -machine options. Downstreams
that enable KVM by default do get bitten, though.
Use qemu_get_machine_opts() to fix these bugs.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1372943363-24081-5-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This includes some pci enhancements:
Better support for systems with multiple PCI root buses
FW cfg interface for more robust pci programming in BIOS
Minor fixes/cleanups for fw cfg and cross-version migration -
because of dependencies with other patches
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'mst/tags/for_anthony' into staging
pci,misc enhancements
This includes some pci enhancements:
Better support for systems with multiple PCI root buses
FW cfg interface for more robust pci programming in BIOS
Minor fixes/cleanups for fw cfg and cross-version migration -
because of dependencies with other patches
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Sun 07 Jul 2013 03:11:18 PM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found
# By David Gibson (10) and others
# Via Michael S. Tsirkin
* mst/tags/for_anthony:
pci: Fold host_buses list into PCIHostState functionality
pci: Remove domain from PCIHostBus
pci: Simpler implementation of primary PCI bus
pci: Add root bus parameter to pci_nic_init()
pci: Add root bus argument to pci_get_bus_devfn()
pci: Replace pci_find_domain() with more general pci_root_bus_path()
pci: Use helper to find device's root bus in pci_find_domain()
pci: Abolish pci_find_root_bus()
pci: Move pci_read_devaddr to pci-hotplug-old.c
pci: Cleanup configuration for pci-hotplug.c
pvpanic: fix fwcfg for big endian hosts
pvpanic: initialization cleanup
MAINTAINERS: s/Marcelo/Paolo/
e1000: cleanup process_tx_desc
pc_piix: cleanup init compat handling
pc: pass PCI hole ranges to Guests
pci: store PCI hole ranges in guestinfo structure
range: add Range structure
Message-id: 1373228271-31223-1-git-send-email-mst@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
At present, pci_nic_init() and pci_nic_init_nofail() assume that they will
only create a NIC under the primary PCI root. As we add support for
multiple PCI roots, that may no longer be the case. This patch adds a root
bus parameter to pci_nic_init() (and updates callers accordingly) to allow
the machine init code using it to specify the right PCI root for NICs
created by old-style -net nic parameters. NICs created new-style, with
-device can of course be put anywhere.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Introduce type constant and cast macro.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Enables support for the in-kernel MPIC that thas been merged into the
KVM next branch. This includes irqfd/KVM_IRQ_LINE support from Alex
Graf (along with some other improvements).
Note from Alex regarding kvm_irqchip_create():
On x86, one would call kvm_irqchip_create() to initialize an
in-kernel interrupt controller. That function then goes ahead and
initializes global capability variables as well as the default irq
routing table.
On ppc, we can't call kvm_irqchip_create() because we can have
different types of interrupt controllers. So we want to do all the
things that function would do for us in the in-kernel device init
handler.
Signed-off-by: Scott Wood <scottwood@freescale.com>
[agraf: squash in kvm_irqchip_commit_routes patch, fix non-kvm build,
fix ppcemb]
Signed-off-by: Alexander Graf <agraf@suse.de>
KVM in-kernel MPIC support is going to expand this even more,
so let's keep it contained.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
We should sync params->ram_size after we fixup memory size on
a alignment boundary. Otherwise Guest would exceed the actual
memory region.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
ePAPR defines the initial values of cpu registers.
This patch initialize the GPRs as per ePAPR specification.
This resolves the issue of guest reboot/reset (guest hang on reboot).
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
[agraf: add whitespace line]
Signed-off-by: Alexander Graf <agraf@suse.de>
Many of these should be cleaned up with proper qdev-/QOM-ification.
Right now there are many catch-all headers in include/hw/ARCH depending
on cpu.h, and this makes it necessary to compile these files per-target.
However, fixing this does not belong in these patches.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Both fields are used in VMState, thus need to be moved together.
Explicitly zero them on reset since they were located before
breakpoints.
Pass PowerPCCPU to kvmppc_handle_halt().
Signed-off-by: Andreas Färber <afaerber@suse.de>
Aaron Larson
Markus Armbruster
Peter Crosthwaite
Peter Maydell
Paolo Bonzini
Shannon Zhao
Marcel Apfelbaum
Michael Tokarev
Amit Tomar
Alexander Graf
Max Filippov
Peter Crosthwaite
Shreyas B. Prabhu
Bharat Bhushan
Marcel Apfelbaum
Andreas Färber
Alexey Kardashevskiy
Anthony Liguori
David Gibson
Scott Wood
Tiejun Chen