qvirtqueue_setup() allocates the vring and virtqueue state. So far
there has been no function to free it. Callers have been using
guest_free() for the vring but forgot to free the QVirtQueue state.
This patch solves the memory leak by introducing qvirtqueue_cleanup().
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The descriptor element, used, and avail vring structs are defined in
virtio_ring.h. There is no need to duplicate them in libqos virtio.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1462798061-30382-6-git-send-email-stefanha@redhat.com
Note that virtio_ring.h defines feature bits using their bit number:
#define VIRTIO_RING_F_INDIRECT_DESC 28
On the other hand libqos virtio.h uses the bit mask:
#define QVIRTIO_F_RING_INDIRECT_DESC 0x10000000
The patch makes the necessary adjustments.
I have used "1u << BITMASK" instead of "1ULL << BITMASK" because the
64-bit feature fields are not implemented in libqos virtio.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1462798061-30382-5-git-send-email-stefanha@redhat.com
Note that VIRTIO_F_ANY_LAYOUT and VIRTIO_F_NOTIFY_ON_EMPTY are bit
numbers in virtio_config.h but bit masks in qtest virtio.h. Therefore
it's necessary to change users from X to (1u << X).
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1462798061-30382-4-git-send-email-stefanha@redhat.com
Avoid redefining device IDs. Use the standard Linux headers that are
already in the source tree.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1462798061-30382-2-git-send-email-stefanha@redhat.com
Convert use of pointers in functions of virtio to uint64_t in order to make it
platform-independent.
Add casting from pointers (in PCI functions) to uint64_t and vice versa through
uintptr_t.
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1424812915-25728-2-git-send-email-marc.mari.barcelo@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Some hosts are slow or overloaded so test execution takes a long time.
Test cases use timeouts to protect against an infinite loop stalling the
test forever (especially important in automated test setups).
Commit 6cd14054b6 ("libqos virtio:
Increase ISR timeout") increased the clock_step() value in an attempt to
lengthen the virtio interrupt wait timeout, but timeout failures are
still occuring on the Travis automated testing platform.
This is because clock_step() only affects the guest's virtual time.
Virtio requests can be bottlenecked on host disk I/O latency - which
cannot be improved by stepping the clock, so the fix was ineffective.
This patch changes the qvirtio_wait_queue_isr() and
qvirtio_wait_config_isr() timeout mechanism from loop iterations to
microseconds. This way the test case can specify an absolute 30 second
timeout. Number of loop iterations is not a reliable timeout mechanism
since the speed depends on many factors including host performance.
Tests should no longer timeout on overloaded Travis instances.
Cc: Marc Marí <marc.mari.barcelo@gmail.com>
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The virtio event_index feature lets the device driver tell the device
how many requests to process before raising the next interrupt.
virtio-blk-test.c tries to verify that the device does not raise an
interrupt unnecessarily.
Unfortunately the test has a race condition. It spins checking for an
interrupt up to 100 times and then assumes the request has finished. On
a slow host the I/O request could still be in flight and the test would
fail.
This patch waits for the request to complete, or until a 30-second
timeout is reached. If an interrupt is raised while waiting the test
fails since the device was not supposed to raise interrupts.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Added avail_event and NO_NOTIFY check before notifying.
Added used_event setting.
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Added MSI-X support for qtest PCI.
Added MSI-X support for virtio-pci.
Added MSI-X test case in virtio-blk-test.
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add functions necessary for working with indirect descriptors.
Add test using new functions.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add status changing and feature negotiation.
Add basic virtqueue support for adding and sending virtqueue requests.
Add ISR checking.
[Squashed request endianness fix by Greg Kurz <gkurz@linux.vnet.ibm.com>
--Stefan]
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add functions to read and write virtio header fields.
Add status bit setting in virtio-blk-device.
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Virtio header has been changed to compile and work with a real device.
Functions bus_foreach and device_find have been implemented for PCI.
Virtio-blk test case now opens a fake device.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Stefan Hajnoczi