- 13 8月, 2013 1 次提交
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由 Stefan Hajnoczi 提交于
When the dataplane thread stops, its vring.c implementation synchronizes vring state back to virtio.c so we can continue emulating the virtio device. This patch ensures that virtio.c's signalled_used_valid flag is reset so that we do not suppress guest notifications due to stale signalled_used values. Suggested-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> (cherry picked from commit 6793dfd1) Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>
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- 09 5月, 2013 1 次提交
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由 Jason Wang 提交于
There are several several issues in the current checking: - The check was based on the minus of unsigned values which can overflow - It was done after .{set|get}_config() which can lead crash when config_len is zero since vdev->config is NULL Fix this by: - Validate the address in virtio_pci_config_{read|write}() before .{set|get}_config - Use addition instead minus to do the validation Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Petr Matousek <pmatouse@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com> Acked-by: NMichael S. Tsirkin <mst@redhat.com> Acked-by: NPetr Matousek <pmatouse@redhat.com> Message-id: 1367905369-10765-1-git-send-email-jasowang@redhat.com Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 04 5月, 2013 1 次提交
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由 KONRAD Frederic 提交于
Add virtio_device_set_child_bus_name function. It will be used with virtio-serial-x and virtio-scsi-x to set the child bus name before calling virtio-x-device's init. Signed-off-by: NKONRAD Frederic <fred.konrad@greensocs.com> Tested-by: NCornelia Huck <cornelia.huck@de.ibm.com> Message-id: 1367330931-12994-3-git-send-email-fred.konrad@greensocs.com Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 25 4月, 2013 3 次提交
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由 KONRAD Frederic 提交于
This clean the init and the exit functions and rename virtio_common_cleanup to virtio_cleanup. Signed-off-by: NKONRAD Frederic <fred.konrad@greensocs.com> Message-id: 1366791683-5350-7-git-send-email-fred.konrad@greensocs.com Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 KONRAD Frederic 提交于
This remove virtio-bindings, and use class instead. Signed-off-by: NKONRAD Frederic <fred.konrad@greensocs.com> Message-id: 1366791683-5350-6-git-send-email-fred.konrad@greensocs.com Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 KONRAD Frederic 提交于
This remove the function pointer in VirtIODevice, and use only VirtioDeviceClass function pointer. Signed-off-by: NKONRAD Frederic <fred.konrad@greensocs.com> Message-id: 1366791683-5350-5-git-send-email-fred.konrad@greensocs.com Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 09 4月, 2013 2 次提交
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由 Paolo Bonzini 提交于
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Paolo Bonzini 提交于
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: NPaolo Bonzini <pbonzini@redhat.com>
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- 01 3月, 2013 1 次提交
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由 Paolo Bonzini 提交于
Done with this script: cd hw for i in `find . -name '*.h' | sed 's/^..//'`; do echo '\,^#.*include.*["<]'$i'[">], s,'$i',hw/&,' done | sed -i -f - `find . -type f` This is so that paths remain valid as files are moved. Instead, files in hw/dataplane are referenced with the relative path. We know they are not going to move to include/, and they are the only include files that are in subdirectories _and_ move. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 02 2月, 2013 2 次提交
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由 Jason Wang 提交于
Add a queue_index to VirtQueue and a helper to fetch it, this could be used by multiqueue supported device. Signed-off-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jason Wang 提交于
Some device (such as virtio-net) needs the ability to destroy or re-order the virtqueues, this patch adds a helper to do this. Signed-off-by: Jason Wang <jasowang> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 22 1月, 2013 1 次提交
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由 KONRAD Frederic 提交于
Create the virtio-device which is abstract. All the virtio-device can extend this class. It also add some functions to virtio-bus. Signed-off-by: NKONRAD Frederic <fred.konrad@greensocs.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 20 12月, 2012 1 次提交
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由 Michael S. Tsirkin 提交于
Move bindings from opaque to DeviceState. This gives us better type safety with no performance cost. Add macros to make future QOM work easier. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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- 19 12月, 2012 1 次提交
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由 Paolo Bonzini 提交于
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 30 11月, 2012 1 次提交
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由 Michael S. Tsirkin 提交于
Commit 0d8d7690 introduced a regression in virtio-net performance because it looks into the ring aggressively while we really only care about a single packet worth of buffers. Reported as bugzilla 1066055 in launchpad. To fix, add parameters limiting lookahead, and use in virtqueue_avail_bytes. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reported-by: NEdivaldo de Araujo Pereira <edivaldoapereira@yahoo.com.br> Tested-by: NEdivaldo de Araujo Pereira <edivaldoapereira@yahoo.com.br> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 23 10月, 2012 1 次提交
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由 Avi Kivity 提交于
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are reserved) and its purpose doesn't match the name (most target_phys_addr_t addresses are not target specific). Replace it with a finger-friendly, standards conformant hwaddr. Outstanding patchsets can be fixed up with the command git rebase -i --exec 'find -name "*.[ch]" | xargs s/target_phys_addr_t/hwaddr/g' origin Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 28 9月, 2012 3 次提交
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由 Amit Shah 提交于
The current virtqueue_avail_bytes() is oddly named, and checks if a particular number of bytes are available in a vq. A better API is to fetch the number of bytes available in the vq, and let the caller do what's interesting with the numbers. Introduce virtqueue_get_avail_bytes(), which returns the number of bytes for buffers marked for both, in as well as out. virtqueue_avail_bytes() is made a wrapper over this new function. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Amit Shah 提交于
The virtqueue_avail_bytes() function counts bytes in an int. Use an unsigned int instead. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Michael S. Tsirkin 提交于
offset of accessed buffer is calculated using iov_length, so it can exceed accessed len. If that happens math in len - offset wraps around, and size becomes wrong. As real value is 0, so this is harmless but unnecessary. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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- 07 8月, 2012 1 次提交
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由 Paolo Bonzini 提交于
Commit b1f416aa breaks vhost_net because it always registers the virtio_pci_host_notifier_read() handler function on the ioeventfd, even when vhost_net.ko is using the ioeventfd. The result is both QEMU and vhost_net.ko polling on the same eventfd and the virtio_net.ko guest driver seeing inconsistent results: # ifconfig eth0 192.168.0.1 netmask 255.255.255.0 virtio_net virtio0: output:id 0 is not a head! To fix this, proceed the same as we do for irqfd: add a parameter to virtio_queue_set_host_notifier_fd_handler and in that case only set the notifier, not the handler. Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Tested-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 12 7月, 2012 2 次提交
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由 Paolo Bonzini 提交于
All transports can use the same event handler for the irqfd, though the exact mechanics of the assignment will be specific. Note that there are three states: handled by the kernel, handled in userspace, disabled. This also lets virtio use event_notifier_set_handler. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Paolo Bonzini 提交于
All transports can use the same event handler for the ioeventfd, though the exact setup (address/memory region) will be specific. This lets virtio use event_notifier_set_handler. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 25 4月, 2012 3 次提交
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由 Michael S. Tsirkin 提交于
virtio has the equivalent of: if (vq->last_avail_index != vring_avail_idx(vq)) { read descriptor head at vq->last_avail_index; } In theory, processor can reorder descriptor head read to happen speculatively before the index read. this would trigger the following race: host descriptor head read <- reads invalid head from ring guest writes valid descriptor head guest writes avail index host avail index read <- observes valid index as a result host will use an invalid head value. This was not observed in the field by me but after the experience with the previous two races I think it is prudent to address this theoretical race condition. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Michael S. Tsirkin 提交于
This fixes an issue dual to the one fixed by patch 'virtio: add missing mb() on notification' and applies on top. In this case, to enable vq kick to exit to host, qemu writes out used flag then reads the avail index. if these are reordered we get a race: host avail index read: ring is empty guest avail index write guest flag read: exit disabled host used flag write: enable exit which results in a lost exit: host will never be notified about the avail index update. Again, happens in the field but only seems to trigger on some specific hardware. Insert an smp_mb barrier operation to ensure the correct ordering. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Michael S. Tsirkin 提交于
During normal operation, virtio first writes a used index and then checks whether it should interrupt the guest by reading guest avail index/flag values. Guest does the reverse: writes the index/flag, then checks the used ring. The ordering is important: if host avail flag read bypasses the used index write, we could in effect get this timing: host avail flag read guest enable interrupts: avail flag write guest check used ring: ring is empty host used index write which results in a lost interrupt: guest will never be notified about the used ring update. This actually can happen when using kvm with an io thread, such that the guest vcpu and qemu run on different host cpus, and this has actually been observed in the field (but only seems to trigger on very specific processor types) with userspace virtio: vhost has the necessary smp_mb() in place to prevent the regordering, so the same workload stalls forever waiting for an interrupt with vhost=off but works fine with vhost=on. Insert an smp_mb barrier operation in userspace virtio to ensure the correct ordering. Applying this patch fixed the race condition we have observed. Tested on x86_64. I checked the code generated by the new macro for i386 and ppc but didn't run virtio. Note: mb could in theory be implemented by __sync_synchronize, but this would make us hit old GCC bugs. Besides old GCC not implementing __sync_synchronize at all, there were bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36793 in this functionality as recently as in 4.3. As we need asm for rmb,wmb anyway, it's just as well to use it for mb. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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- 19 4月, 2012 1 次提交
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由 Paolo Bonzini 提交于
Serializing virtio-scsi requests needs a simple way to get from a VirtQueue to the number of the queue. The virtio_queue_get_id provides this. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 10 2月, 2012 1 次提交
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由 Luiz Capitulino 提交于
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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- 21 1月, 2012 1 次提交
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由 Alexander Graf 提交于
When accessing the device specific virtio config space, we memcpy the data into a variable in QEMU. At that point we're basically pulling host endianness into the game which is a really bad idea. So instead, let's use the target specific load/store helpers for memory pointers which fetch things in target endianness. The whole array is already populated in target endianness anyways (see virtio-blk). Signed-off-by: NAlexander Graf <agraf@suse.de> Reviewed-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 29 11月, 2011 1 次提交
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由 Paolo Bonzini 提交于
vdev->guest_features is not masking features that are not supported by the guest. Fix this by introducing a common wrapper to be used by all virtio bus implementations. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 24 9月, 2011 1 次提交
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由 David Gibson 提交于
The virtio code uses wmb() macros in several places, as required by the SMP-aware virtio protocol. However the wmb() macro is locally defined to be a compiler barrier only. This is probably sufficient on x86 due to its strong storage ordering model, but it certainly isn't on other platforms, such as ppc. In any case, qemu already has some globally defined memory barrier macros in qemu-barrier.h. This patch, therefore converts virtio.c to use those barrier macros. The macros in qemu-barrier.h are also wrong (or at least, safe for x86 only) but this way at least there's only one place to fix them. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 17 9月, 2011 1 次提交
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由 Stefan Hajnoczi 提交于
The virtio device lifecycle can be observed by looking at the sequence of set status operations. This is especially important for catching the reset operation (status value 0), which resets the device and all virtqueues. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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- 16 9月, 2011 2 次提交
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由 Luiz Capitulino 提交于
Use runstate_is_running() instead, which is introduced by this commit. Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
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由 Luiz Capitulino 提交于
Today, when notifying a VM state change with vm_state_notify(), we pass a VMSTOP macro as the 'reason' argument. This is not ideal because the VMSTOP macros tell why qemu stopped and not exactly what the current VM state is. One example to demonstrate this problem is that vm_start() calls vm_state_notify() with reason=0, which turns out to be VMSTOP_USER. This commit fixes that by replacing the VMSTOP macros with a proper state type called RunState. Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
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- 21 8月, 2011 1 次提交
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由 Anthony Liguori 提交于
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 28 7月, 2011 1 次提交
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由 Amit Shah 提交于
virtio_common_init() allocates RAM for the vdev struct (and any additional memory, depending on the size passed to the function). This memory wasn't being freed until now. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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- 17 7月, 2011 1 次提交
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由 Michael S. Tsirkin 提交于
We were previously allowing arbitrarily-long indirect descriptors, which could lead to a buffer overflow in qemu-kvm process. CVE-2011-2212 Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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- 24 6月, 2011 1 次提交
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由 Markus Armbruster 提交于
error_report() prepends location, and appends a newline. The message constructed from the arguments should not contain a newline. Fix the obvious offenders. Signed-off-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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- 12 6月, 2011 3 次提交
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由 Michael S. Tsirkin 提交于
Add support for event_idx feature, and utilize it to reduce the number of interrupts and exits for the guest. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Jason Wang 提交于
Current vm_running was not explicitly initialized and its value was changed by vm state notifier, this may confuse the virtio device being hotplugged such as virtio-net with vhost backend as it may think the vm was not running. Solve this by initialize this value explicitly in virtio_common_init(). Signed-off-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Stefan Hajnoczi 提交于
The virtio_queue_notify() function checks that the virtqueue number is less than the maximum number of virtqueues. A signed comparison is used but the virtqueue number could be negative if a buggy or malicious guest is run. This results in memory accesses outside of the virtqueue array. It is risky doing input validation in common code instead of at the guest<->host boundary. Note that virtio_queue_set_addr(), virtio_queue_get_addr(), virtio_queue_get_num(), and many other virtio functions do *not* validate the virtqueue number argument. Instead of fixing the comparison in virtio_queue_notify(), move the comparison to the virtio bindings (just like VIRTIO_PCI_QUEUE_SEL) where we have a uint32_t value and can avoid ever calling into common virtio code if the virtqueue number is invalid. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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