This patch implements basic MSI-X support for virtio-rng.
The device uses the virtio preferred method of working with MSI-X by
creating one vector for configuration and one vector for each vq in the
device.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This makes MMIO callback similar to it's PIO counterpart by passing
a void* value provided in the registration to the callback function.
This allows to keep context within the MMIO callback function.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
PCI BAR probing is done in four steps:
1. Read address (and flags).
2. Mask BAR.
3. Read BAR again - Now the expected result is the size of the BAR.
4. Mask BAR with address.
So far, we have only took care of the first step. This means that the kernel
was using address as the size, causing a PCI allocation blunder.
This patch fixes the issue by passing a proper size after masking.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Map GSIs manually when starting the guest.
This will allow us mapping new GSIs for MSIX in the future.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Ingo reported a build breakage caused by absence of 'notrace' definition. Fix
it by adding compiler.h into own headers set.
Reported-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
In preparation for refcount block cache, move L2 cache data structures to
'struct qcow_l1_table'.
Cc: Prasad Joshi <prasadjoshi124@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch renames the ambiguous 'struct qcow_table' to 'struct qcow_l1_table'
in preparation for introducing 'struct qcow_refcount_table'.
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Use the newly introduced KVM_CAP_MAX_VCPUS to determine max VCPU count
the kernel side supports.
Using more VCPUs than the recommended limit will issue a warning, using more
than the absolute maximum will limit it down to the absolute maximum.
Note this patch contains a hack to define KVM_CAP_MAX_VCPUS and should be
removed when the kernel patch is merged with mainline.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
The --guest-ip option tells which IP address to give guest through DHCP.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
uip_tx_do_ipv4_udp_dhcp() is used to handle DHCP packages from guest.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch get domain name and nameserver information from host config
file /etc/resolv.conf.
Guest can obtain DNS information through DHCP.
Signed-off-by: Asias He <asias.hejun@gmail.com>
[ penberg@kernel.org: check fscanf() for errors ]
Signed-off-by: Pekka Enberg <penberg@kernel.org>
If DHCP DISCOVER or DHCP REQUEST is found, reply with DHCP OFFER or DHCP
ACK respectively.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch checks:
- sport and dport
- magic cookie
to detemine whether a UDP package is a DHCP package.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This helper cooks a ethernet package and virtio header for UDP.
This patch also makes uip_udp_socket_thread() shorter.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Return device id when requested by virtio-blk.
Device id is currently based on the device information and the inode
number of the underlying disk image.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Rename kvm-[command] into builtin-[command] to prevent
clashes with non-command files such as kvm-cpu.h
Suggested-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Add a 'kvm version' command which prints the version of the kernel
used to build kvm tools.
Part of the code is based on and was loaned from perf.
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
"K. Watts" writes:
When the singlestep is enabled the ioctl to sent out when the kvm_cpu
is initialized (kvm-cpu.c in the for loop that gets each vcpu built).
When the ioct goes out the CPU is sitting at the initialization vector
of 0xf000:0xfff0 on CPU #0 and 0x000000 on the other SMP CPUs. The
new host kernel code that handles setting the TF was changed in 2.6.32
and again at 2.6.38. 2.6.32 seems just flat broken, but 2.6.38 checks
that the linear address of the RIP matches what it was when the
KVM_GUESTDBG_SINGLESTEP flag was set. Because the kvm-tool doesn't
start the CPU at the initialization vector (0xfff0) (0x7c00 for the
MBR and where ever you guys map the linux kernel to) they don't match
and the host kernel won't set the trap flag.
Basically the debug and singlestep ioclts need to happen after the CPU
has been initialized. I moved kvm_cpu__enable_singlestep to happen in
kvm_cpu__reset_vcpu after the registers are set (EIP points to boot
address) and the TRAP flags get set and all is good with the world.
Singlestepping is disabled when the guest issues a CLI because the
Linux host doesn't support features in new Intel and AMD CPUs. We can
sort of "shadow" the interrupt mask and still get the CPU to trap out
at ever instruction even when the guest has disabled interrupts on the
CPU. I have to get the bios disk handler working completely first,
but that may be my next task so that we can trace all the CPU
instructions. My current hack is to just re-enable the trap flag
every time a VMEXIT occurs. I get enough instructions to get me by.
This patch fixes the problem by moving the kvm_cpu__enable_singlestep() into
kvm_cpu__start().
Suggested-by: K. Watts <traetox@gmail.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This will allow cleaning up ghost pid files outside of the module.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Add a command to allow easily inflate/deflate the balloon driver in running
instances.
Usage:
kvm balloon [command] [instance name] [size]
command is either inflate or deflate, and size is represented in MB.
Target instance must be named (started with '--name').
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
From the virtio spec:
The virtio memory balloon device is a primitive device for managing guest
memory: the device asks for a certain amount of memory, and the guest supplies
it (or withdraws it, if the device has more than it asks for). This allows the
guest to adapt to changes in allowance of underlying physical memory.
To activate the virtio-balloon device run kvm tools with the '--balloon'
command line parameter.
Current implementation listens for two signals:
- SIGKVMADDMEM: Adds 1M to the balloon driver (inflate). This will decrease
available memory within the guest.
- SIGKVMDELMEM: Remove 1M from the balloon driver (deflate). This will
increase available memory within the guest.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This will allow tracking instance names and sending commands
to specific instances if multiple instances are running.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
To allow efficient use of shorter-term threadpool jobs, don't
allocate them dynamically upon creation. Instead, store them
within 'job' structures.
This will prevent some overhead creating/destroying jobs which live
for a short time.
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch implement rx interface for uip. uip_rx() can be called in
virtio_net_rx_thread().
It is a consumer of the ethernet used buffer. It sleeps until there is
used buffer avaiable and copy ethernet data into virtio iov buffers
which provided by virtio_net_rx_thread().
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch implement tx interface for uip. uip_tx() can be called in
virtio_net_tx_thread().
It dispatches ethernet frame to ARP or IP handling code.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
- Implement uip_tx_do_ipv4_tcp() to send TCP package to remote host.
- Implement uip_tcp_socket_thread() to receive TCP package from
remote host.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Guest's initial sequence number can be found in the SYN package that
guest send to us to intialize a TCP session.
Remote server's initial sequence number is faked. RFC 793 specifies
that the ISN should be viewed as a 32-bit counter that increments
by one every 4 microseconds. For simplicity's sake, current
implementation in uip just returns a constant.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch adds too helpers uip_tcp_is_syn(), uip_tcp_is_fin() to check if SYN and
FIN bit is set.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
uip_tcp_payload() returns start address of TCP payload in a TCP package.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This patch adds three helpers uip_tcp_hdrlen(), uip_tcp_len(),
uip_tcp_payloadlen() to return TCP header length, TCP totoal
length, and tcp payload length.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
struct uip_tcp_socket is used to present every session
between guest and remote host.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
- Implement uip_tx_do_ipv4_udp() to send UDP package to remote host.
- Implement uip_udp_socket_thread() to receive UDP package from
remote host.
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Sasha Levin