| Commit message (Collapse) | Author | Age | Files | Lines |
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Current code seems to assume ring size is
always decreased but this is not required by spec:
what spec says is just that size can not exceed
the maximum. Fix it up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <1484256243-1982-1-git-send-email-mst@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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Currently there're two functions, s390_pci_setup_msix() and
s390_pci_msix_init(), for msix initialization, and being called once
for each zpci device plugging. Let's integrate them.
Moreover msix is mandatory in s390 architecture. So we ensure the pci
device being plugged supports msix. For vfio (which is the only tested
setup so far), nothing changes.
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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The PCI bus number is usually set by the host during the enumeration.
In the s390 architecture we neither get a Device Tree nor have an
enumeration understanding bridge devices.
Let's fake the enumeration on reset and set the PCI_PRIMARY_BUS,
PCI_SECONDARY_BUS and PCI_SUBORDINATE_BUS config entries for the
bridges.
Let's add the configuration of these three config entries on bridge hot
plug.
The bus number is calculated based on a new entry, bus_num of the
S390pciState device.
This commit is inspired by what spapr pci does.
Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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After PCI multibus is supported, more than 32 PCI devices could be
plugged. The current implementation of s390_pci_find_dev_by_fh()
appears low performance if there's a huge number of PCI devices
plugged. Therefore we introduce a hashtable using idx as key to store
zpci device's pointer on account of translating fh to idx very easily.
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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When the hotplug handler detects a PCI bridge, the secondary bus has
been initialized by the core PCI code. We give the secondary bus the
bridge name and associate to it the IOMMU handling and
hotplug/hotunplug callbacks.
Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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A function may recursively call device search functions or may call
serveral different device search function. Passing the S390pciState to
search functions as an argument instead of looking up it inside the
search functions lowers the number of calling s390_get_phb().
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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In order to support a greater number of devices we use a QTAILQ
list of devices instead of a limited array.
This leads us to change:
- every lookup function s390_pci_find_xxx() for QTAILQ
- the FH_MASK_INDEX to index up to 65536 devices
Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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When initializing a PCI device, an address space is required during PCI
core initialization and before the call to the embedding object hotplug
callback. To provide this AS, we allocate a S390PCIIOMMU object
containing this AS. Initialization of S390PCIIOMMU object is done
before the PCI device is completely created. So that we cannot
associate the IOMMU with the device at the moment. To track the IOMMU
object, we use g_hash functions with the PCI device's bus address as a
key to provide an array of pointers indexed by the PCI device's devfn
to the allocated IOMMU.
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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Currently S390PCIIOMMU is a normal struct. Let's make it inherit Object
in order to take advantage of QOM. In addition, we move some stuff
related to IOMMU from S390PCIBusDevice to S390PCIIOMMU.
Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Acked-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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Let's use kvm_gsi_routing_enabled() to check if kvm supports
KVM_CAP_IRQ_ROUTING in order to avoid a needless ioctl invocation.
Signed-off-by: Fei Li <sherrylf@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
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We chain our compat handler via the CCW_COMPAT macros and via the
class_init function. (e.g. ccw_machine_2_7_class_options calls
ccw_machine_2_8_class_options). As all class_init functions in that
chain call SET_MACHINE_COMPAT for their compat settings, and
SET_MACHINE_COMPAT will append there is no need to do that again.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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staging
# gpg: Signature made Fri 20 Jan 2017 02:58:57 GMT
# gpg: using RSA key 0xEF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F 3562 EF04 965B 398D 6211
* remotes/jasowang/tags/net-pull-request:
tap: fix memory leak on failure in net_init_tap()
hw/pci: use-after-free in pci_nic_init_nofail when nic device fails to initialize
hw/net/dp8393x: Avoid unintentional sign extensions on addresses
m68k: QOMify the MCF Fast Ethernet Controller device
net: optimize checksum computation
docs: Fix description of the sentence
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Commit 091a6b2ac fixed most of the memory leaks in failure
paths in net_init_tap() reported by Coverity (CID 1356216),
but missed one. Fix it by deferring the allocation of
fds and vhost_fds until after the error check.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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initialize
object_property_set_bool(OBJECT(dev), true, "realized", &err) in
pci_nic_init_nofail may release the object if device fails to
initialize which leads to use-after-free in error handling block.
qdev_init_nofail does the same thing while holding the reference.
(gdb) run -net nic
qemu-system-x86_64: failed to find romfile "efi-e1000.rom"
Program received signal SIGSEGV, Segmentation fault.
object_unparent (obj=0x7fffe96a0010) at qom/object.c:440
440 in qom/object.c
(gdb) bt
<nd_table>, rootbus=0x5555567ed990, default_model=<optimized out>,
default_devaddr=<optimized out>) at hw/pci/pci.c:1812
pci_bus=0x5555567ed990) at hw/i386/pc.c:1634
pci_type=0x555555c1a523 "i440FX", host_type=0x555555ba564e
"i440FX-pcihost") at hw/i386/pc_piix.c:241
out>, envp=<optimized out>) at vl.c:4481
Signed-off-by: Alex Kompel <barbos@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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The dp8393x has several 32-bit values which are formed by concatenating
two 16 bit device register values. Attempting to do these inline
with ((s->reg[HI] << 16) | s->reg[LO]) can result in an unintended
sign extension because "x << 16" is of type 'int' even though s->reg
is unsigned, and so if the expression is used in a context where
it is cast to uint64_t the value is incorrectly sign-extended.
Fix this by using accessor functions with a uint32_t return type;
this also makes the code a bit easier to read.
This should fix Coverity issues 1307765, 1307766, 1307767, 1307768.
(To avoid having a ctda read function only used in a DPRINTF,
we move the DPRINTF down slightly so it can use the ttda function.)
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Tested-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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When running qemu-system-m68k with the "-net" parameter (for example
simply "-net nic -net user"), there is currently a confusing warning
message saying:
Warning: requested NIC (anonymous, model mcf_fec) was not created
(not supported by this machine?)
This seems to happen because the MCF NIC has never been adapted to
the currently expected QEMU device behavior. Thus let's QOMify the
NIC now to get rid of the warning message.
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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Very simple loop optimization with a significant performance impact.
Microbenchmark results, modern x86-64:
buffer size | speed up
------------+---------
1500 | 1.7x
64 | 1.5x
8 | 1.15x
Microbenchmark results, POWER7:
buffer size | speed up
------------+---------
1500 | 5x
64 | 3.3x
8 | 1.13x
There is a lot of room for further improvement at the expense of
code complexity - aligned multibyte reads, LE/BE considerations,
architecture-specific optimizations, etc. This patch still keeps
things simple and readable.
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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Say it in another way to make it easier to understand.
Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Jason Wang <jasowang@redhat.com>
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virtio, vhost, pc: fixes, features
writeable fw cfg blobs which will be used for guest to host
communication
fixes and cleanups all over the place
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Thu 19 Jan 2017 21:08:04 GMT
# gpg: using RSA key 0x281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>"
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469
* remotes/mst/tags/for_upstream:
virtio: force VIRTIO_F_IOMMU_PLATFORM
virtio: fix up max size checks
vhost: drop VHOST_F_DEVICE_IOTLB
update-linux-headers.sh: support __bitwise
virtio_crypto: header update
pci_regs: update to latest linux
virtio-mmio: switch to linux headers
virtio_mmio: add standard header file
virtio: drop an obsolete comment
fw-cfg: bump "x-file-slots" to 0x20 for 2.9+ machine types
pc: Add 2.9 machine-types
fw-cfg: turn FW_CFG_FILE_SLOTS into a device property
fw-cfg: support writeable blobs
vhost_net: device IOTLB support
virtio: disable notifications again after poll succeeded
Revert "virtio: turn vq->notification into a nested counter"
virtio-net: enable ioeventfd even if vhost=off
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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We allow vhost to clear VIRITO_F_IOMMU_PLATFORM which is wrong since
VIRTIO_F_IOMMU_PLATFORM is mandatory for security. Fixing this by
enforce it after vdc->get_features().
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Coverity reports that ARRAY_SIZE(elem->out_sg) (and all the others too)
is wrong because elem->out_sg is a pointer.
However, the check is not in the right place and the max_size argument
of virtqueue_map_iovec can be removed. The check on in_num/out_num
should be moved to qemu_get_virtqueue_element instead, before the call
to virtqueue_alloc_element.
Cc: qemu-stable@nongnu.org
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Fixes: 3724650db07057333879484c8bc7d900b5c1bf8e ("virtio: introduce virtqueue_alloc_element")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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Upstream does not have it, uses VIRTIO_F_IOMMU_PLATFORM
to signal support instead.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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In 4.10, Linux is switching from __bitwise__ to use __bitwise
exclusively. Update our script accordingly.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Update header from latest linux driver. Session creation structs gain
padding to make them same size. Formatting cleanups.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
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this drops a duplicate definition of
PCI_EXT_CAP_ATS_SIZEOF
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Switch to virtio_mmio.h from Linux - will make it
easier to implement virtio 1.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio core has code to revert queue number
to maximum on reset. Drop TODO to add that.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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More precisely, the "x-file-slots" count is bumped for all machine types
that:
(a) use fw_cfg, and
(b) are not versioned (hence migration is not expected to work for them
across QEMU releases anyway), or have version 2.9.
This affects machine types implemented in the following source files:
- "hw/arm/virt.c". The "virt-*" machine type is versioned, and the <= 2.8
versions already depend on HW_COMPAT_2_8 (see commit e353aac51b944).
Therefore adding the "x-file-slots" compat values to HW_COMPAT_2_8
suffices.
- "hw/i386/pc.c". The "pc-i440fx-*" (including "pc-*") and "pc-q35-*"
machine types are versioned. Modifying HW_COMPAT_2_8 is sufficient here
too (see commit "pc: Add 2.9 machine-types"). The "isapc" machtype is
not versioned. The "xenfv" machine type, which uses fw_cfg for direct
kernel booting, is also not versioned.
- "hw/ppc/mac_newworld.c". The "mac99" machine type is not versioned.
- "hw/ppc/mac_oldworld.c". The "g3beige" machine type is not versioned.
- "hw/sparc/sun4m.c". None of the 9 machine types defined in this file
appear versioned.
- "hw/sparc64/sun4u.c". None of the 3 machine types defined in this file
appear versioned.
Cc: "Gabriel L. Somlo" <somlo@cmu.edu>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Artyom Tarasenko <atar4qemu@gmail.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Gabriel Somlo <somlo@cmu.edu>
Tested-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
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Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Gabriel Somlo <somlo@cmu.edu>
Tested-by: Gabriel Somlo <somlo@cmu.edu>
Cc: Gabriel Somlo <somlo@cmu.edu>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
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We'd like to raise the value of FW_CFG_FILE_SLOTS. Doing it naively could
lead to problems with backward migration: a more recent QEMU (running an
older machine type) would allow the guest, in fw_cfg_select(), to select a
high key value that is unavailable in the same machine type implemented by
the older (target) QEMU. On the target host, fw_cfg_data_read() for
example could dereference nonexistent entries.
As first step, size the FWCfgState.entries[*] and FWCfgState.entry_order
arrays dynamically. All three array sizes will be influenced by the new
field FWCfgState.file_slots (and matching device property).
Make the following changes:
- Replace the FW_CFG_FILE_SLOTS macro with FW_CFG_FILE_SLOTS_MIN (minimum
count of fw_cfg file slots) in the header file. The value remains 0x10.
- Replace all uses of FW_CFG_FILE_SLOTS with a helper function called
fw_cfg_file_slots(), returning the new property.
- Eliminate the macro FW_CFG_MAX_ENTRY, and replace all its uses with a
helper function called fw_cfg_max_entry().
- In the MMIO- and IO-mapped realize functions both, allocate all three
arrays dynamically, based on the new property.
- The new property defaults to FW_CFG_FILE_SLOTS_MIN. This is going to be
customized in the following patches.
Cc: "Gabriel L. Somlo" <somlo@cmu.edu>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Gabriel Somlo <somlo@cmu.edu>
Tested-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
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Useful to send guest data back to QEMU.
Changes from Laszlo Ersek <lersek@redhat.com>:
- rebase the patch from Michael Tsirkin's original postings at [1] and [2]
to the following patches:
- loader: Allow a custom AddressSpace when loading ROMs
- loader: Add AddressSpace loading support to uImages
- loader: fix handling of custom address spaces when adding ROM blobs
- reject such writes immediately that would exceed the end of the array,
rather than performing a partial write before setting the error bit: see
the (len != dma.length) condition
- document the write interface
[1] http://lists.nongnu.org/archive/html/qemu-devel/2016-02/msg04968.html
[2] http://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg02735.html
Cc: "Gabriel L. Somlo" <somlo@cmu.edu>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Michael Walle <michael@walle.cc>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Shannon Zhao <zhaoshenglong@huawei.com>
Cc: qemu-arm@nongnu.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Acked-by: Gabriel Somlo <somlo@cmu.edu>
Tested-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
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This patches implements Device IOTLB support for vhost kernel. This is
done through:
1) switch to use dma helpers when map/unmap vrings from vhost codes
2) introduce a set of VhostOps to:
- setting up device IOTLB request callback
- processing device IOTLB request
- processing device IOTLB invalidation
2) kernel support for Device IOTLB API:
- allow vhost-net to query the IOMMU IOTLB entry through eventfd
- enable the ability for qemu to update a specified mapping of vhost
- through ioctl.
- enable the ability to invalidate a specified range of iova for the
device IOTLB of vhost through ioctl. In x86/intel_iommu case this is
triggered through iommu memory region notifier from device IOTLB
invalidation descriptor processing routine.
With all the above, kernel vhost_net can co-operate with userspace
IOMMU. For vhost-user, the support could be easily done on top by
implementing the VhostOps.
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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While AioContext is in polling mode virtqueue notifications are not
necessary. Some device virtqueue handlers enable notifications. Make
sure they stay disabled to avoid unnecessary vmexits.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Richard Henderson <rth@twiddle.net>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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This reverts commit aff8fd18f1786fc5af259a9bc0077727222f51ca.
Both virtio-net and virtio-crypto do not balance
virtio_queue_set_notification() enable and disable calls. This makes
the notifications_disabled counter unreliable and Doug Goldstein
reported the following assertion failure:
#3 0x00007ffff44d1c62 in __GI___assert_fail (
assertion=assertion@entry=0x555555ae8e8a "vq->notification_disabled > 0",
file=file@entry=0x555555ae89c0 "/home/doug/work/qemu/hw/virtio/virtio.c",
line=line@entry=215,
function=function@entry=0x555555ae9630 <__PRETTY_FUNCTION__.43707>
"virtio_queue_set_notification") at assert.c:101
#4 0x00005555557f25d6 in virtio_queue_set_notification (vq=0x55555666aa90,
enable=enable@entry=1) at /home/doug/work/qemu/hw/virtio/virtio.c:215
#5 0x00005555557dc311 in virtio_net_has_buffers (q=<optimized out>,
q=<optimized out>, bufsize=102)
at /home/doug/work/qemu/hw/net/virtio-net.c:1008
#6 virtio_net_receive (nc=<optimized out>, buf=0x555557386b88 "", size=102)
at /home/doug/work/qemu/hw/net/virtio-net.c:1148
#7 0x00005555559cad33 in nc_sendv_compat (flags=<optimized out>, iovcnt=1,
iov=0x7fffead746d0, nc=0x55555788b340) at net/net.c:705
#8 qemu_deliver_packet_iov (sender=<optimized out>, flags=<optimized out>,
iov=0x7fffead746d0, iovcnt=1, opaque=0x55555788b340) at net/net.c:732
#9 0x00005555559cd929 in qemu_net_queue_deliver (size=<optimized out>,
data=<optimized out>, flags=<optimized out>, sender=<optimized out>,
queue=0x55555788b550) at net/queue.c:164
#10 qemu_net_queue_flush (queue=0x55555788b550) at net/queue.c:261
This patch is safe to revert since it's just an optimization for
virtqueue polling. The next patch will improve the situation again
without resorting to nesting.
Reported-by: Doug Goldstein <cardoe@cardoe.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Richard Henderson <rth@twiddle.net>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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virtio-net-pci does not enable ioeventfd for historical reasons (and
nobody ever checked whether it should be revisited). Note that other
backends do enable ioeventfd for virtio-net.
However, it has a major effect on performance. On Windows, throughput is
_multiplied_ by 2 or 3 on TCP_STREAM (on small packets it is "only" a 30%
improvement) and a little less so on TCP_MAERTS albeit still very much
statistically significant. Latency also has a single digit improvement.
This is not visible when using vhost, which forces ioeventfd=on, but it
is substantial without vhost. In addition, also on Windows and with the
RHEL 7.3 kernel, APICv seems to slow down virtio-net performance a bit,
but the penalty with this patch goes from -25% to -7%.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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into staging
Error reporting patches for 2017-01-19
# gpg: Signature made Thu 19 Jan 2017 14:51:17 GMT
# gpg: using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg: aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653
* remotes/armbru/tags/pull-error-2017-01-19:
error: Report certain hints on stderr when no monitor
error: error_setg_errno(): errno gets preserved
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Hints printed with error_printf_unless_qmp() are suppressed outside
monitor context. Reproducer:
$ qemu-system-x86_64 -m 1Z
qemu-system-x86_64: -m 1Z: Parameter 'size' expects a size
Print to stderr instead. The reproducer now additionally prints:
You may use k, M, G or T suffixes for kilobytes, megabytes, gigabytes and terabytes.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170105135957.12003-1-marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
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C11 allows errno to be clobbered by pretty much any library function
call, so in general callers need to take care to save errno before
calling other functions.
However, for error reporting functions this is rather awkward and can
make the code on the caller side more complicated than
necessary. error_setg_errno() already takes care of preserving errno
and some functions rely on that, so just promise that we continue to
do so in the future.
Signed-off-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Message-Id: <1469611466-31574-1-git-send-email-silbe@linux.vnet.ibm.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
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'remotes/pmaydell/tags/pull-target-arm-20170120' into staging
target-arm queue:
* support virtualization in GICv3
* enable EL2 in AArch64 CPU models
* allow EL2 to be enabled on 'virt' board via -machine virtualization=on
* aspeed: SMC improvements
* m25p80: support die erase command
* m25p80: Add Quad Page Program 4byte
* m25p80: Improve 1GiB Micron flash definition
* arm: Uniquely name imx25 I2C buses
# gpg: Signature made Fri 20 Jan 2017 11:31:53 GMT
# gpg: using RSA key 0x3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg: aka "Peter Maydell <pmaydell@gmail.com>"
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE
* remotes/pmaydell/tags/pull-target-arm-20170120: (36 commits)
hw/arm/virt: Add board property to enable EL2
target-arm: Enable EL2 feature bit on A53 and A57
target/arm/psci.c: If EL2 implemented, start CPUs in EL2
hw/arm/virt-acpi-build: use SMC if booting in EL2
hw/arm/virt: Support using SMC for PSCI
hw/intc/arm_gicv3: Implement EL2 traps for CPU i/f regs
hw/intc/arm_gicv3: Implement gicv3_cpuif_virt_update()
hw/intc/arm_gicv3: Implement ICV_ registers EOIR and IAR
hw/intc/arm_gicv3: Implement ICV_ HPPIR, DIR and RPR registers
hw/intc/arm_gicv3: Implement ICV_ registers which are just accessors
hw/intc/arm_gicv3: Add accessors for ICH_ system registers
hw/intc/gicv3: Add data fields for virtualization support
hw/intc/gicv3: Add defines for ICH system register fields
target-arm: Add ARMCPU fields for GIC CPU i/f config
hw/arm/virt: Wire VIRQ, VFIQ, maintenance irq lines from GIC to CPU
target-arm: Expose output GPIO line for VCPU maintenance interrupt
hw/intc/arm_gic: Add external IRQ lines for VIRQ and VFIQ
hw/intc/arm_gicv3: Add external IRQ lines for VIRQ and VFIQ
hw/arm/virt-acpi - reserve ECAM space as PNP0C02 device
arm: virt: Fix segmentation fault when specifying an unsupported CPU
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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Add a board level property to the virt board which will
enable EL2 on the CPU if the user asks for it. The
default is not to provide EL2. If EL2 is enabled then
we will use SMC as our PSCI conduit, and report the
virtualization support in the GICv3 device tree node
and the ACPI tables.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1483977924-14522-19-git-send-email-peter.maydell@linaro.org
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Enable the ARM_FEATURE_EL2 bit on Cortex-A52 and
Cortex-A57, since this is all now sufficiently implemented
to work with the GICv3. We provide the usual CPU property
to disable it for backwards compatibility with the older
virt boards.
In this commit, we disable the EL2 feature on the
virt and ZynpMP boards, so there is no overall effect.
Another commit will expose a board-level property to
allow the user to enable EL2.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1483977924-14522-18-git-send-email-peter.maydell@linaro.org
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The PSCI spec states that a CPU_ON call should cause the new
CPU to be started in the highest implemented Non-secure
exception level. We were incorrectly starting it at the
exception level of the caller, which happens to be correct
if EL2 is not implemented. Implement the correct logic
as described in the PSCI 1.0 spec section 6.4:
* if EL2 exists and SCR_EL3.HCE is set: start in EL2
* otherwise start in EL1
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Tested-by: Andrew Jones <drjones@redhat.com>
Message-id: 1483977924-14522-17-git-send-email-peter.maydell@linaro.org
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Signed-off-by: Andrew Jones <drjones@redhat.com>
Acked-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1483977924-14522-16-git-send-email-peter.maydell@linaro.org
[PMM: look at vms->psci_conduit rather than vms->virt
to decide whether to use HVC or SMC, and report no
PSCI support at all for the 'PSCI disabled' case]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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If we are giving the guest a CPU with EL2, it is likely to
want to use the HVC instruction itself, for instance for
providing PSCI to inner guest VMs. This makes using HVC
as the PSCI conduit for the outer QEMU a bad idea. We will
want to use SMC instead is this case: this makes sense
because QEMU's PSCI implementation is effectively an
emulation of functionality provided by EL3 firmware.
Add code to support selecting the PSCI conduit to use,
rather than hardcoding use of HVC.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-id: 1483977924-14522-15-git-send-email-peter.maydell@linaro.org
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Implement the architecturally required traps from NS EL1
to EL2 for the CPU interface registers. These fall into
several different groups:
* group-0-only registers all trap if ICH_HRC_EL2.TALL0 is set
(exactly the registers covered by gicv3_fiq_access())
* group-1-only registers all trap if ICH_HRC_EL2.TALL1 is set
(exactly the registers covered by gicv3_irq_access())
* DIR traps if ICH_HCR_EL2.TC or ICH_HCR_EL2.TDIR are set
* PMR, RPR, CTLR trap if ICH_HCR_EL2.TC is set
* SGI0R, SGI1R, ASGI1R trap if ICH_HCR_EL2.TC is set or
if HCR_EL2.IMO or HCR_EL2.FMO are set
We split DIR and the SGI registers out into their own access
functions, leaving the existing gicv3_irqfiq_access() just
handling PMR, RPR and CTLR.
This commit doesn't implement support for trapping on
HSTR_EL2.T12 for the 32-bit registers, as we don't implement
any of those per-coprocessor trap bits currently and
probably will want to do those in some more centralized way.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1483977924-14522-14-git-send-email-peter.maydell@linaro.org
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Implement the function which signals virtual interrupts to the
CPU as appropriate following CPU interface state changes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1483977924-14522-13-git-send-email-peter.maydell@linaro.org
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Implement the two remaining ICV_ registers: EOIR and IAR.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1483977924-14522-12-git-send-email-peter.maydell@linaro.org
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Implement the the ICV_ registers HPPIR, DIR and RPR.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1483977924-14522-11-git-send-email-peter.maydell@linaro.org
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