When running a pseries guest in PR KVM on top of pHyp, sc 1 instructions
are handled directly by pHyp, so we don't get to see them.
That means we need to get inventive. Invent a new instruction that behaves
like sc 1, but really is a reserved instruction that traps. This instruction
can be used by KVM to emulate sc 1 behavior.
This patch adds the SLOF support for it. With this, SLOF detects whether
it's running on such a broken setup and if so patches itself to execute
the fake sc 1 instruction instead of the real one.
Furthermore, we also hook into "quiesce" which Linux calls when it boots.
This gives us the chance to also patch Linux when it boots up, so it uses
the fake sc 1 too.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
The print_version() is jumping through hoops to get back to where
it was called from, though it actually does get called with "bl"
already, so it knows.
Just return to where we came from after print_version(), making it
a function we can call from other places in the code.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
* Fix freeing of memory in error path
* Boolean and int were used interchangebly at various points,
consolidate it to use boolean
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Initial display output does not show up in the VGA/VNC window.
Create replay buffer to store the initial output and when vga/vnc
console starts, dump the buffer there.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Since client-architecture-support is not support by the mainline QEMU yet,
this warning might be confusing so remove it.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
We byte swap the entire header in place in elf_check_file.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Add byte swap macros that take a pointer and byte swap
in place.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
This patch generaliazes the device alias name enumeration for all scsi disks, virtio-blk
disks and network devices.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
When passing a 1KB disk, it goes on looping inside the deblocker,
ignoring the unability of driver to read from out-of-bound blocks.
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
QEMU supports a bootindex property for every device in the command line.
With the respective support from the QEMU side, this change is enough
to make SLOF go through the list and try to boot.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
drmgr expects ibm,my-drc-index and ibm,loc-code OF properties in
the corresponding device tree node to determine whether a
pre-populated slot is hotpluggable/unpluggable. This is also
stated as a boot-time requirement for DR-capable devices in SPAPR,
though it does not specify there how these entries are to be generated.
In the case of QEMU, hotpluggable slots are allocated entries based on
bus/slotno values, so we can determine these entries statically at
boot-time, rather than relying on RTAS calls as we would during
OS-driven configuration.
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
While netbooting with yaboot, code was failing at
dma-map-out.
Remember my-handle and store for further reference,
which is needed for dma-map-out during close. yaboot for
some reason does not set the current-node while calling
close.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
usb-ohci.c: In function ‘ohci_process_done_head’:
usb-ohci.c:458:4: warning: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘struct ohci_td *’ [-Wformat]
usb-ohci.c:417:20: warning: variable ‘start_frame’ set but not used [-Wunused-but-set-variable]
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
This patch adds support for booting from a IPv6 network. It gets the boot information
(tftp server, boot file name) from DHCPv6 server or can be specified manually using
obp-tftp arguments. To boot from a IPv6 network, type "boot net:ipv6" from the SLOF
prompt. To specify ipaddresses manually, type "boot net:ipv6,<si6addr>,<filename>,<ci6addr>"
from the SLOF prompt.
This patch is based on the IPv6 code written by the former SLOF team.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Sometimes before ARP request frame is written to the line by qemu, the data gets overwritten
by next outgoing frame (typically tftp request) since both use the same ARP table index for
the frame buffer. This is fixed by copying the next outgoing packet data to a different
buffer instead of writing it to same ARP table index's frame buffer.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Since they were stack variable, chances are that the buffer pointer is invalid
during data transfer
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Since SLOF is poll based, in a high network traffic zone desired packet might be missed
during receiving. Hence increase the receive queue size.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Since SLOF is poll based, in a high network traffic zone desired packet might be missed
during receiving. Hence increase the receive queue size.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
The routine had got complicated and source of few bugs while using in
pci-passthru and js2x
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
So if there is no boot order from qemu, nvram, the default
boot order will be to try from "disk" aliases, "cdrom" aliases
and lastly "net" aliases
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
PCI window bars sometimes returns 0 as the a start address. This will
be used by the allocator. Devices or Software can take it as null
address.
Mark 0 address as always allocated during initialization.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
* disk alias names are not correct
* also drop stack variable in case we overflow max-alias
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Currently we only boot from " disk" and " cdrom", we can do better by
iterating through the diskN/cdromN aliases created during disk probing.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Code still does not support xhci, disable creation of xhci node, as it
was causing crash in the quiesce path.
Also check if ops pointer is verified before accessing function
pointers during usb_hcd_exit.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
This fixed size of reading the version (which is actually 32bit), this
removes confusing "cas not implemented" message from the guest.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
Changes:
v2:
* replaced w@ (16 bit) with l@ (32 bit)
This removes dropping allocated memory buffer off the stack in the case
when no change to the tree was generated by QEMU.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Current fdt.fs takes device-tree start address from fdt-start,
this needs to be made generic for parsing device tree at later
point
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Commit ec5c9e8b (Use root.fs on qemu as well) would set the bootargs/bootpath
to null string even in case when the /chosen node exist, the /chosen and boot
property were populated during fdt parsing so do not change in case its already
set.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
When multiple clients are active simultaneously, they might open network
devices that is already opened by other clients. This results in failure
to transfer packets since obp-tftp package is not instantiated on each open.
This patch resolves it by instantiating obp-tftp on each open.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
The code in close for calling quiesce looks if there is stdin and
checks whether is being closed. That condition was being used to call
quiesce.
So in case when the ihandle is not that of stdin, close-dev was missing.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Add support for booting from a GPT partitioned disk.
Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
The previous scheme always put 0 as a parent slot#. However it is
not always the case and QEMU's PCI bridge does not support putting
device at slot#0 as it claims SHPC support for hotplug.
This modifies the interrups map to let the linux guest resolve XICS
global interrupt number correctly.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Endpoint descriptors toggleCarry bit needs to be preserved when using
DataToggle bit in transfer descriptor is set to 0.
Also zero the bulk_curr_ed
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
* Add Reset Recovery procedure
* Zero cbw and csw memory everytime
* Add delays during cbw, data and csw stage
* Increment tag after every command
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
* Some usb devices do not like report-luns, assume it as single lun device
and move further.
* Make inquiry of the device first for 36bytes and then determine what
is the additional size to read.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Alexander Graf