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To avoid misinterpreting INACTIVE after migration as old qemu-kvm's
STANDBY, also clear rom_state_paddr when going back to this state.
CC: qemu-stable@nongnu.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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ROM layout may change after reset of devices are hotplugged, so we have
to pick up the physical address again when the ROM is initialized. This
is best achieved by resetting the state to INACTIVE.
CC: qemu-stable@nongnu.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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If not caught early, a zero-length ROM will cause a NULL-pointer access
later on in patch_hypercalls when allocating a zero-length ROM copy and
trying to read from it.
CC: qemu-stable@nongnu.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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staging
ARM queue:
* aarch64 preparation patchset (excluding the defconfigs, so this
doesn't actually enable the new targets yet)
* minor bugfixes and cleanups
* disable "-cpu any" in system emulation mode
* fix ARMv7M stack alignment on reset
# gpg: Signature made Tue 10 Sep 2013 01:46:11 PM CDT using RSA key ID 14360CDE
# gpg: Can't check signature: public key not found
# By Alexander Graf (13) and others
# Via Peter Maydell
* pmaydell/tags/pull-target-arm-20130910: (28 commits)
configure: Add handling code for AArch64 targets
linux-user: Add AArch64 support
linux-user: Allow targets to specify a minimum uname release
linux-user: Add AArch64 termbits.h definitions
linux-user: Implement cpu_set_tls() and cpu_clone_regs() for AArch64
linux-user: Make sure NWFPE code is 32 bit ARM only
linux-user: Add signal handling for AArch64
linux-user: Fix up AArch64 syscall handlers
linux-user: Add syscall number definitions for AArch64
linux-user: Add cpu loop for AArch64
linux-user: Don't treat AArch64 cpu names specially
target-arm: Add AArch64 gdbstub support
target-arm: Add AArch64 translation stub
target-arm: Prepare translation for AArch64 code
target-arm: Disable 32 bit CPUs in 64 bit linux-user builds
target-arm: Add new AArch64CPUInfo base class and subclasses
target-arm: Pass DisasContext* to gen_set_pc_im()
target-arm: Fix target_ulong/uint32_t confusions
target-arm: Export cpu_env
target-arm: Extract the disas struct to a header file
...
Message-id: 1378839142-7726-1-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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# By Gerd Hoffmann (2) and Christophe Fergeau (1)
# Via Gerd Hoffmann
* spice/spice.v73:
qxl: fix local renderer
qxl: trace io port name
spice-core: Use g_strdup_printf instead of snprintf
Message-id: 1378807572-27902-1-git-send-email-kraxel@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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# By Gerd Hoffmann (2) and Miroslav Rezanina (2)
# Via Gerd Hoffmann
* kraxel/usb.89:
ehci: save device pointer in EHCIState
Remove dev-bluetooth.c dependency from vl.c
Preparation for usb-bt-dongle conditional build
usb: sanity check setup_index+setup_len in post_load
Message-id: 1378806073-25197-1-git-send-email-kraxel@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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# By Tomoki Sekiyama (10) and Paul Burton (1)
# Via Michael Roth
* mdroth/qga-pull-2013-9-9:
QMP/qemu-ga-client: Make timeout longer for guest-fsfreeze-freeze command
qemu-ga: Install Windows VSS provider on `qemu-ga -s install'
qemu-ga: Call Windows VSS requester in fsfreeze command handler
qemu-ga: Add Windows VSS provider and requester as DLL
error: Add error_set_win32 and error_setg_win32
qemu-ga: Add configure options to specify path to Windows/VSS SDK
Add a script to extract VSS SDK headers on POSIX system
checkpatch.pl: Check .cpp files
Add c++ keywords to QAPI helper script
configure: Support configuring C++ compiler
mips_malta: support up to 2GiB RAM
Message-id: 1378755701-2051-1-git-send-email-mdroth@linux.vnet.ibm.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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# By Anthony PERARD
# Via Stefano Stabellini
* sstabellini/xen-2013-09-09:
pc_q35: Initialize Xen.
pc: Initializing ram_memory under Xen.
Message-id: alpine.DEB.2.02.1309091718030.6397@kaball.uk.xensource.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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# By Paolo Bonzini (21) and others
# Via Stefan Hajnoczi
* stefanha/block: (42 commits)
qemu-iotests: Fixed test case 026
qemu-iotests: Whitespace cleanup
dataplane: Fix startup race.
block: look for zero blocks in bs->file
block: add default get_block_status implementation for protocols
raw-posix: report unwritten extents as zero
raw-posix: return get_block_status data and flags
docs, qapi: document qemu-img map
qemu-img: add a "map" subcommand
block: return BDRV_BLOCK_ZERO past end of backing file
block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO
block: return get_block_status data and flags for formats
block: define get_block_status return value
block: introduce bdrv_get_block_status API
block: make bdrv_has_zero_init return false for copy-on-write-images
qemu-img: always probe the input image for allocated sectors
block: expect errors from bdrv_co_is_allocated
block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction
block: do not use ->total_sectors in bdrv_co_is_allocated
block: make bdrv_co_is_allocated static
...
Message-id: 1378481953-23099-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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Clarify a comment about the ID register value presented by
the PL110 variant present on the VersatilePB board (based
on testing what the actual hardware does), to indicate that
this is not an error in our emulation, and to remove an #if-0.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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We'll need a pointer to the actual pci/sysbus device,
stick a pointer to it into the EHCIState struct.
https://bugzilla.redhat.com/show_bug.cgi?id=1005495
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Use usb_legacy_register handling to create bt-dongle device and remove code
dependency from vl.c so CONFIG_USB_BLUETOOTH can be disabled.
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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To allow disable usb-bt-dongle device using CONFIG_BLUETOOTH option, some of
functions in vl.c file has to be made accessible in dev-bluetooth.c. This is
pure code moving.
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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The local spice renderer assumes the primary surface is located at the
start of the "ram" bar. This used to be a requirement in qxl hardware
revision 1. In revision 2+ this is relaxed. Nevertheless guest drivers
continued to use the traditional location, for historical and backward
compatibility reasons. The qxl kms driver doesn't though as it depends
on qxl revision 4+ anyway.
Result is that local rendering is hosed for recent linux guests, you'll
get pixel garbage with non-spice ui (gtk, sdl, vnc) and when doing
screendumps. Fix that by doing a proper mapping of the guest-specified
memory location.
https://bugzilla.redhat.com/show_bug.cgi?id=948717
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Add c++ keywords to avoid errors in compiling with c++ compiler.
This also renames class member of PciDeviceInfo to q_class.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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A Malta board can support up to 2GiB of RAM. Since the unmapped kseg0/1
regions are only 512MiB large & the latter 256MiB of those are taken up
by the IO region, access to RAM beyond 256MiB must be done through a
mapped region. In the case of a Linux guest this means we need to use
highmem.
The mainline Linux kernel does not support highmem for Malta at this
time, however this can be tested using the linux-mti-3.8 kernel branch
available from:
git://git.linux-mips.org/pub/scm/linux-mti.git
You should be able to boot a Linux kernel built from the linux-mti-3.8
branch, with CONFIG_HIGHMEM enabled, using 2GiB RAM by passing "-m 2G"
to QEMU and appending the following kernel parameters:
mem=256m@0x0 mem=256m@0x90000000 mem=1536m@0x20000000
Note that the upper half of the physical address space of a Malta
mirrors the lower half (hence the 2GiB limit) except that the IO region
(0x10000000-0x1fffffff in the lower half) is not mirrored in the upper
half. That is, physical addresses 0x90000000-0x9fffffff access RAM
rather than the IO region, resulting in a physical address space
resembling the following:
0x00000000 -> 0x0fffffff RAM
0x10000000 -> 0x1fffffff I/O
0x20000000 -> 0x7fffffff RAM
0x80000000 -> 0x8fffffff RAM (mirror of 0x00000000 -> 0x0fffffff)
0x90000000 -> 0x9fffffff RAM
0xa0000000 -> 0xffffffff RAM (mirror of 0x20000000 -> 0x7fffffff)
The second mem parameter provided to the kernel above accesses the
second 256MiB of RAM through the upper half of the physical address
space, making use of the aliasing described above in order to avoid
the IO region and use the whole 2GiB RAM.
The memory setup may be seen as 'backwards' in this commit since the
'real' memory is mapped in the upper half of the physical address space
and the lower half contains the aliases. On real hardware it would be
typical to see the upper half of the physical address space as the alias
since the bus addresses generated match the lower half of the physical
address space. However since the memory accessible in the upper half of
the physical address space is uninterrupted by the IO region it is
easiest to map the RAM as a whole there, and functionally it makes no
difference to the target code.
Due to the requirements of accessing the second 256MiB of RAM through
a mapping to the upper half of the physical address space it is usual
for the bootloader to indicate a maximum of 256MiB memory to a kernel.
This allows kernels which do not support such access to boot on systems
with more than 256MiB of RAM. It is also the behaviour assumed by Linux.
QEMUs small generated bootloader is modified to provide this behaviour.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
CC: qemu-stable@nongnu.org
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Now that the memory subsystem is propagating the endianness correctly,
the ne2000 device should have its I/O ports marked as LITTLE_ENDIAN, as
PCI devices are little endian.
This makes the ne2000 NIC to work again on PowerPC.
Cc: qemu-stable@nongnu.org
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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This eliminates a warning about __packed being redefined as exposed by the
vmxnet3 code. __packed is not used anywhere in the vmxnet3 code.
CC hw/net/vmxnet3.o
In file included from hw/net/vmxnet3.c:29:
hw/net/vmxnet3.h:37:1: warning: "__packed" redefined
In file included from /usr/include/stdlib.h:38,
from /buildbot-qemu/default_openbsd_current/build/include/qemu-common.h:26,
from /buildbot-qemu/default_openbsd_current/build/include/hw/hw.h:5,
from hw/net/vmxnet3.c:18:
/usr/include/sys/cdefs.h:209:1: warning: this is the location of the previous definition
Signed-off-by: Brad Smith <brad@comstyle.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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This patch partially implements the e1000 interrupt mitigation mechanisms.
Using a single QEMUTimer, it emulates the ITR register (which is the newer
mitigation register, recommended by Intel) and approximately emulates
RADV and TADV registers. TIDV and RDTR register functionalities are not
emulated (RDTR is only used to validate RADV, according to the e1000 specs).
RADV, TADV, TIDV and RDTR registers make up the older e1000 mitigation
mechanism and would need a timer each to be completely emulated. However,
a single timer has been used in order to reach a good compromise between
emulation accuracy and simplicity/efficiency.
The implemented mechanism can be enabled/disabled specifying the command
line e1000-specific boolean parameter "mitigation", e.g.
qemu-system-x86_64 -device e1000,mitigation=on,... ...
For more information, see the Software developer's manual at
http://download.intel.com/design/network/manuals/8254x_GBe_SDM.pdf.
Interrupt mitigation boosts performance when the guest suffers from
an high interrupt rate (i.e. receiving short UDP packets at high packet
rate). For some numerical results see the following link
http://info.iet.unipi.it/~luigi/papers/20130520-rizzo-vm.pdf
Signed-off-by: Vincenzo Maffione <v.maffione@gmail.com>
Reviewed-by: Andreas Färber <afaerber@suse.de> (for pc-* machines)
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Avoid trying to setup dataplane again if dataplane setup is already in
progress. This may happen if an eventfd is triggered during setup.
I saw this occasionally with an experimental s390 irqfd implementation:
virtio_blk_handle_output
-> virtio_blk_data_plane_start
-> virtio_ccw_set_host_notifier
...
-> virtio_queue_set_host_notifier_fd_handler
-> virtio_queue_host_notifier_read
-> virtio_queue_notify_vq
-> virtio_blk_handle_output
-> virtio_blk_data_plane_start
-> vring_setup
-> hostmem_init
-> memory_listener_register
-> BOOM
As virtio-ccw tries to follow what virtio-pci does, it might be triggerable
for other platforms as well.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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We call bdrv_attach_dev when initializing whether or not bs is created
locally, so call bdrv_detach_dev and let the refcnt handle the
lifecycle.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Manage BlockDriverState lifecycle with refcnt, so bdrv_delete() is no
longer public and should be called by bdrv_unref() if refcnt is
decreased to 0.
This is an identical change because effectively, there's no multiple
reference of BDS now: no caller of bdrv_ref() yet, only bdrv_new() sets
bs->refcnt to 1, so all bdrv_unref() now actually delete the BDS.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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QOM CPUState refactorings / X86CPU
* Conversion of global CPU list to QTAILQ - preparing for CPU hot-unplug
* Document X86CPU magic numbers for CPUID cache info
# gpg: Signature made Tue 03 Sep 2013 10:59:22 AM CDT using RSA key ID 3E7E013F
# gpg: Can't check signature: public key not found
# By Andreas Färber (3) and Eduardo Habkost (1)
# Via Andreas Färber
* afaerber/tags/qom-cpu-for-anthony:
target-i386: Use #defines instead of magic numbers for CPUID cache info
cpu: Replace qemu_for_each_cpu()
cpu: Use QTAILQ for CPU list
a15mpcore: Use qemu_get_cpu() for generic timers
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# By Stefan Weil (6) and others
# Via Michael Tokarev
* mjt/trivial-patches:
aio / timers: use g_usleep() not sleep()
adlib: sort offsets in portio registration
qmp: fix integer usage in examples
tci: Remove function tcg_out64 (fix broken build)
target-arm: Report unimplemented opcodes (LOG_UNIMP)
pflash_cfi02.c: fix debug macro
configure: Remove unneeded redirections of stderr (pkg-config --exists)
configure: Remove unneeded redirections of stderr (pkg-config --cflags, --libs)
configure: Don't write .pyc files by default (python -B)
curl: qemu_bh_new() can never return NULL
slirp/arp_table.c: Avoid shifting into sign bit of signed integers
configure: disable clang -Wstring-plus-int warning
rdma: silly ipv6 bugfix
misc: Fix some typos in names and comments
slirp: Port redirection option behave differently on Linux and Windows
Message-id: 1378119695-14568-1-git-send-email-mjt@msgid.tls.msk.ru
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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# By Gerd Hoffmann (10) and Marcel Apfelbaum (1)
# Via Gerd Hoffmann
* kraxel/usb.88:
usb/dev-hid: Modified usb-tablet category from Misc to Input
Revert "usb-hub: report status changes only once"
usb-hub: add tracepoint for status reports
usb: parallelize usb3 streams
uas: add property for request logging
xhci: reset port when disabling slot
xhci: emulate intr endpoint intervals correctly
xhci: fix endpoint interval calculation
xhci: add port to slot_address tracepoint
xhci: add tracepoint for endpoint state changes
xhci: remove leftover debug printf
Message-id: 1378117055-29620-1-git-send-email-kraxel@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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pc,pci,virtio fixes and cleanups
This includes pc and pci cleanups and enhancements,
and a virtio bugfix for level interrupts.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Sun 01 Sep 2013 03:15:36 AM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found
# By Michael S. Tsirkin (3) and others
# Via Michael S. Tsirkin
* mst/tags/for_anthony:
virtio_pci: fix level interrupts with irqfd
pc: reduce duplication, fix PIIX descriptions
hw: Clean up bogus default boot order
pci: add config space access traces
pc: fix regression for 64 bit PCI memory
pci: Introduce helper to retrieve a PCI device's DMA address space
Message-id: 1378023590-11109-1-git-send-email-mst@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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staging
QOM device refactorings
* Fix QOM and ISA documentation errors
* Extend object_initialize() et al. to check the instance size
# gpg: Signature made Fri 30 Aug 2013 02:19:48 PM CDT using RSA key ID 3E7E013F
# gpg: Can't check signature: public key not found
# By Andreas Färber (14) and others
# Via Andreas Färber
* afaerber/tags/qom-devices-for-anthony:
isa: Fix documentation of isa_register_portio_list()
qom: Assert instance size in object_initialize_with_type()
qom: Pass available size to object_initialize()
qdev: Pass size to qbus_create_inplace()
virtio-mmio: Pass size to virtio_mmio_bus_new()
virtio-ccw: Pass size to virtio_ccw_bus_new()
s390-virtio-bus: Pass size to virtio_s390_bus_new()
virtio-pci: Pass size to virtio_pci_bus_new()
usb: Pass size to usb_bus_new()
scsi: Pass size to scsi_bus_new()
pci: Pass size to pci_bus_new_inplace()
ide: Pass size to ide_bus_new()
ipack: Pass size to ipack_bus_new_inplace()
intel-hda: Pass size to hda_codec_bus_init()
qom: Fix object_initialize_with_type() argument name in documentation
virtio: Remove unnecessary OBJECT() casts
object: Fix typo in qom/object.h
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It was introduced to loop over CPUs from target-independent code, but
since commit 182735efaf956ccab50b6d74a4fed163e0f35660 target-independent
CPUState is used.
A loop can be considered more efficient than function calls in a loop,
and CPU_FOREACH() hides implementation details just as well, so use that
instead.
Suggested-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
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Introduce CPU_FOREACH(), CPU_FOREACH_SAFE() and CPU_NEXT() shorthand
macros.
Signed-off-by: Andreas Färber <afaerber@suse.de>
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This simplifies the loop and aids with refactoring of CPU list.
Requested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
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usb-tablet device was wrongly assigned to Misc category
Reported-by: Markus Armbruster <armbru@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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This reverts commit a309ee6e0a256f690760abfba44fceaa52a7c2f3.
This isn't in line with the usb specification and adds regressions,
win7 fails to drive the usb hub for example.
Was added because it "solved" the issue of hubs interacting badly
with the xhci host controller. Now with the root cause being fixed
in xhci (commit <FIXME>) we can revert this one.
Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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usb3 bulk endpoints with streams are implicitly pipelined now,
so the requests will actually be processed in parallel. Also
allow them to complete out-of-order.
Fixes stalls in the uas driver.
Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Respect the interval for interrupt endpoints, so we don't finish
transfers as fast as possible but at the rate configured by the guest.
Fixes guest deadlocks triggered by interrupt storms.
Cc:
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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This converts old style fprintf to traces.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[agraf: change patch subject]
Signed-off-by: Alexander Graf <agraf@suse.de>
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PAPR+ requires two RTAS calls to be supported by the hypervisor in
order to allow hotplugging VCPUs from the guest. The "start-cpu" RTAS
call was already there but "stop-self" was not.
This adds the "stop-self" RTAS call.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
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H_SET_MODE is used for controlling various partition settings. One
of these settings is the endianness a guest takes its exceptions in.
Signed-off-by: Anton Blanchard <anton@samba.org>
[agraf: fix whitespace]
Signed-off-by: Alexander Graf <agraf@suse.de>
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Registration of global state belongs into realize so move it there.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
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On the sPAPR platform a guest allocates MSI/MSIX vectors via RTAS
hypercalls which return global IRQ numbers to a guest so it only
operates with those and never touches MSIMessage.
Therefore MSIMessage handling is completely hidden in QEMU.
Previously every sPAPR PCI host bridge implemented its own MSI window
to catch msi_notify()/msix_notify() calls from QEMU devices (virtio-pci
or vfio) and route them to the guest via qemu_pulse_irq().
MSIMessage used to be encoded as:
.addr - address within the PHB MSI window;
.data - the device index on PHB plus vector number.
The MSI MR write function translated this MSIMessage to a global IRQ
number and called qemu_pulse_irq().
However the total number of IRQs is not really big (at the moment it is
1024 IRQs starting from 4096) and even 16bit data field of MSIMessage
seems to be enough to store an IRQ number there.
This simplifies MSI handling in sPAPR PHB. Specifically, this does:
1. remove a MSI window from a PHB;
2. add a single memory region for all MSIs to sPAPREnvironment
and spapr_pci_msi_init() to initialize it;
3. encode MSIMessage as:
* .addr - a fixed address of SPAPR_PCI_MSI_WINDOW==0x40000000000ULL;
* .data as an IRQ number.
4. change IRQ allocator to align first IRQ number in a block for MSI.
MSI uses lower bits to specify the vector number so the first IRQ has to
be aligned. MSIX does not need any special allocator though.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
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