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s390x: Dispatch interrupts to KVM or the real CPU
The KVM interrupt injection path is non-generic for now. So we need to pushknowledge of how to inject a device interrupt using KVM into the actual devicecode.
Signed-off-by: Alexander Graf <agraf@suse.de>...
Replace cpu_physical_memory_rw were possible
Using cpu_physical_memory_read, cpu_physical_memory_write and ldub_physimproves readability and allows removing some type casts.
lduw_phys and ldl_phys were not used because both require alignedaddresses. Therefore it is not possible to simply replace existing...
s390x: fix virtio feature bitmap
The feature bitmap in the s390 virtio machine is little endian. Toaddress for that, we need to bswap the values after reading them out.
Signed-off-by: Alexander Graf <agraf@suse.de>Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
s390x: fix s390-virtio-serial
Commit 6b331efb733a0f913ddc0b7762a1307dec304061 broke the s390 proxy versionof virtio-serial by only taking its PCI brother into account.
So let's adjust s390-virtio-serial the same way as its PCI counterpart, makingit compile and work again....
virtio: use generic name when possible
We have two different virtio buses: pci and s390. The abstraction pathtaken in qemu is to have generic aliases for each device type in thearchitecture specific qdev devices.
So let's make use of these aliases whenever we can and define them...
virtio-net: Introduce a new bottom half packet TX
Based on a patch from Mark McLoughlin, this patch introduces a newbottom half packet transmitter that avoids the latency imposed bythe tx_timer approach. Rather than scheduling a timer when a TXpacket comes in, schedule a bottom half to be run from the iothread....
virtio-net: Limit number of packets sent per TX flush
If virtio_net_flush_tx() is called with notification disabled, we canrace with the guest, processing packets at the same rate as theyget produced. The trouble is that this means we have no guaranteed...
virtio-net: Make tx_timer timeout configurable
Add an option to make the TX mitigation timer adjustable as a deviceoption. The 150us hard coded default used currently is reasonable,but may not be suitable for all workloads, this gives us a way toadjust it using a single binary. We can't support any random option...
Implement virtio reset
The guest may issue a RESET command for virtio. So far we didn't botherto implement it, but with my new bootloader we actually need it for Linuxto get back to a safe state.
virtio: add set_status callback
vhost net backend needs to be notified whenfrontend status changes. Add a callback,similar to set_features.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
s390-virtio: Fix compile error for virtio-block init
Commit 428c149b0be790b440e1cbee185b152cdb22feec modified the argumentthat virtio_blk_init takes. Update the s390 bus code that calls thisfunction.
Signed-off-by: Amit Shah <amit.shah@redhat.com>CC: Christoph Hellwig <hch@lst.de>...
block: add topology qdev properties
Add three new qdev properties to export block topology information tothe guest. This is needed to get optimal I/O alignment for RAID arraysor SSDs.
The options are:
- physical_block_size to specify the physical block size of the device,...
virtio-console: qdev conversion, new virtio-serial-bus
This commit converts the virtio-console device to create a newvirtio-serial bus that can host console and generic serial ports. Thefile hosting this code is now called virtio-serial-bus.c.
The virtio console is now a very simple qdev device that sits on the...
virtio: rename features -> guest_features
Rename features->guest_features. This iswhat they are, avoid confusion withhost features which we also need to keep around.
virtio: add features as qdev properties
Add feature bits as properties to virtio. This makes it possible to e.g. definemachine without indirect buffer support, which is required for 0.10compatibility, or without hardware checksum support, which is required for 0.11...
S390: Don't tell guest we're updating config space
Currently we always set the "config space changed" bit to 1 when triggeringany virtio interrupt. While that worked in 2.6.27, newer kernels interpretthat value as "only the config space changed and nothing else happened"....
Add S390x virtio machine bus
On S390x we don't want to go through the hassle of emulating real existinghardware, because we don't need to for running Linux.
So let's instead implement a machine that is 100% based on VirtIO which wefortunately implement already....