net_tap_fd_init() already returns TAPState, so this is a sensible
cleanup in its own right.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
If a write() on tapfd returns EAGAIN, return zero so that the packet
gets queued (in the case of async send) and enable polling tapfd for
writing.
When tapfd becomes writable, disable write polling and flush any queued
packets.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Add a helper to enable/disable the read polling on tapfd.
We need this, because we want to start write polling on the tapfd too
and enable/disable both types of polling independently.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
If tap has any packets queued at host_net_remove time, it needs to purge
them in order to prevent a sent callback being invoked for it.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
If net client sends packets asynchronously, it needs to purge its queued
packets in cleanup() so as to prevent sent callbacks being invoked with
a freed client.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
APIC reset handler already resets cpu, no need to reset it twice.
Also register cpu_reset handler directly to make it impossible to
add additional code to main_cpu_reset() by mistake.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Make drive_init() accept addr=, put the value into struct DriveInfo.
Use it in all the places that create virtio-blk-pci devices:
pc_init1(), bamboo_init(), mpc8544ds_init().
Don't support addr= in third argument of monitor command pci_add and
second argument of drive_add, because that clashes with their first
arguments. Admittedly unelegant.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Simply pass the PCI address through qemu_pci_hot_add_nic() to
pci_nic_init() and through qemu_pci_hot_add_storage() to pci_create().
Before, pci_device_hot_add() passed along the PCI bus to use, and
ignored any user-specified slot.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Make net_client_init() accept addr=, put the value into struct
NICinfo. Use it in pci_nic_init(), and remove arguments bus and
devfn.
Don't support addr= in third argument of monitor command pci_add,
because that clashes with its first argument. Admittedly unelegant.
Machines "malta" and "r2d" have a default NIC with a well-known PCI
address. Deal with that the same way as the NIC model: make
pci_nic_init() take an optional default to be used when the user
doesn't specify one.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
use NULL instead of 0 for pci_register_device() argument
for consistency. Any other caller uses NULL.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
When virtio-net was merged in from qemu-kvm.git, the VNET_HDR related
features were dropped from the code.
However, VIRTIO_NET_F_MRG_RXBUF appears to have accidentally been
dropped too. Re-instate that now.
Reported-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
introruce piix4_device_hot_add() for piix4 specific code
and make qemu_system_device_hot_add() generic.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This should fix compilation problem in case of CONFIG_USER_ONLY.
Currently INIT/SIPI is handled in the context of CPU that sends IPI.
This patch changes this to handle them like all other events in a main
cpu exec loop. When KVM will gain thread per vcpu capability it will
be much more clear to handle those event by cpu thread itself and not
modify one cpu's state from the context of the other.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Support a new feature flag for indirect ring entries. These are ring
entries which point to a table of buffer descriptors.
The idea here is to increase the ring capacity by allowing a larger
effective ring size whereby the ring size dictates the number of
requests that may be outstanding, rather than the size of those
requests.
This should be most effective in the case of block I/O where we can
potentially benefit by concurrently dispatching a large number of
large requests. Even in the simple case of single segment block
requests, this results in a threefold increase in ring capacity.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Change the vring descriptor helpers to take the physical
address of the descriptor table rather than a virtqueue.
This is needed in order to allow these helpers to be used
with an indirect descriptor table.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Fix the pcap dumps on Win32 and other systems where O_BINARY is required.
Signed-off-by: Filip Navara <filip.navara@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The code how it is today, is totally painful to read and keep.
To begin with, the code is duplicated with the option rom loading
code that linux_boot and vga are already using.
This patch introduces a "bootable" state in NICInfo structure,
that we can use to keep track of whether or not a given nic should
be bootable, avoiding the introduction of yet another global state.
With that in hands, we move the code in vl.c to hw/pc.c, and use
the already existing infra structure to load those option roms.
Error checking code suggested by Mark McLoughlin
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
On Tue, Jun 16, 2009 at 08:19:23PM -0500, Anthony Liguori wrote:
> malc wrote:
>>
>> On my system the above line causes gcc to emit:
>>
>> In file included from /home/malc/x/rcs/git/qemu/linux-user/strace.c:12:
>> /usr/include/linux/futex.h:48: error: field `__user' has incomplete type
>> /usr/include/linux/futex.h:48: error: syntax error before '*' token
>> /usr/include/linux/futex.h:63: error: field `list' has incomplete type
>> /usr/include/linux/futex.h:83: error: field `__user' has incomplete type
>> /usr/include/linux/futex.h:83: error: syntax error before '*' token
>> make[1]: *** [strace.o] Error 1
> We had the same problem with usb-linux.c. It's broken system headers,
> the __user stuff is supposed to get removed as part of the headers
> installation.
> It builds fine on my system (Fedora 10).
Howabout something like this:
commit eb8387cb0eda32a18880664eb5f0ca5c8bf05b45
Author: Riku Voipio <riku.voipio@iki.fi>
Date: Thu Jun 18 22:44:31 2009 +0300
Subject: linux-user: include futex defines directly
Since some common distributions have broken linux/futex.h, stop
including it. Instead add the defines directly.
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
Also zero pci_irq_levels on reset to avoid stuck irq after reset.
Based on 15a1956af9 by Gleb Natapov.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Also zero pci_irq_levels on reset to avoid stuck irq after reset.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Yaniv Kamay <ykamay@redhat.com>
The device is not reset on system reset currently.
Without this patch RHEL4.8 hangs after reboot if -usbdevice table
is in use.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This reverts commit 3dcd219f09.
It is incorrect to call qemu_irq functions (or any other functions that
access other device state) during savevm/loadvm.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
remove unnecessary #if NB_MMU_MODES by using loop.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
vga_screen_dump_blank() was not generating a valid PPM file: the width of the
image made no sense (why it was multiplied by sizeof(uint32_t)?), and there was
only one sample per pixel, instead of three.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Section 10.8.25 ("START/STOP UNIT Command") of SFF-8020i states that
if the device is locked we should refuse to eject if the device is
locked.
ASC_MEDIA_REMOVAL_PREVENTED is the appropriate return in this case.
In order to stop itself from ejecting the media it is running from,
Fedora's installer (anaconda) requires the CDROMEJECT ioctl() to fail
if the drive has been previously locked.
See also https://bugzilla.redhat.com/501412
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
provide a monitor command to allow one to set the maximum
downtime he is willing to suffer during migration, in seconds.
"ms", "us", "ns" and "s" are accepted as modifiers.
This parameter will be used by ram_save_live() code to determine
a safe moment to enter stage 3
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Currently, we're entering migration's stage 3 when
a treshold of 10 pages remain to be transferred in the system.
This has hurt some users. However, any proposed threshold is
arbitrary by nature, and would only shift the annoyance.
The proposal of this patch is to define a max_downtime variable,
which represents the maximum downtime a migration user is willing
to suffer. Then, based on the bandwidth of last iteration, we
calculate how much data we can transfer in such a window of time.
Whenever we reach that value (or lower), we know is safe to enter
stage3.
This has largely improved the situation for me.
On localhost migrations, where one would expect things to go as
quickly as me running away from the duty of writting software for
windows, a kernel compile was enough to get the migration stuck.
It takes 20 ~ 30 iterations now.
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
User space may only inject interrupts during kvm_arch_pre_run if
ready_for_interrupt_injection is set in kvm_run. But that field is
updated on exit from KVM_RUN, so we must ensure that we enter the
kernel after potentially queuing an interrupt, otherwise we risk to
loose one - like it happens with the current code against latest
kernel modules (since kvm-86) that started to queue only a single
interrupt.
Fix the problem by reordering kvm_cpu_exec.
Credits go to Gleb Natapov for analyzing the issue in details.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Also replave qemu_bh_cancel with qemu_bh_delete in bdrv_aio_cancel_em.
Otherwise the bh will live forever in the bh list.
Signed-off-by: Dor Laor <dor@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
vl.c contains some dead code that initialises a 'label' string with the name
of the char device being initialised. This is unused.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
