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239 Commits

Author SHA1 Message Date
Sasha Levin 2a24f96d64 kvm tools: Rename command source files 
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>
 2015-06-01 16:39:46 +01:00
Sasha Levin 16b2bb87b9 kvm tools: Add 'kvm version' command 
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>
 2015-06-01 16:39:46 +01:00
Pekka Enberg 6d6a4d41b1 kvm tools: Fix guest single-stepping setup 
"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>
 2015-06-01 16:39:46 +01:00
Sasha Levin dc4cd384e1 kvm tools: Export kvm__remove_pidfile 
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>
 2015-06-01 16:39:45 +01:00
Sasha Levin 9dba6721a9 kvm tools: Add 'kvm list' command 
Use 'kvm list' to list running virtual guest.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Sasha Levin 5cac5d9c43 kvm tools: Add 'kvm balloon' command 
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>
 2015-06-01 16:39:45 +01:00
Sasha Levin 82d2f21ed7 kvm tools: Add virtio-balloon device 
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>
 2015-06-01 16:39:45 +01:00
Sasha Levin 5358b0e6f0 kvm tools: Allow giving instance names 
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>
 2015-06-01 16:39:45 +01:00
Sasha Levin df0c7f571e kvm tools: Don't dynamically allocate threadpool jobs 
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>
 2015-06-01 16:39:45 +01:00
Aneesh Kumar K.V bfc152686a tools/kvm/9p: Add encode/decode routines for protocol data 
The protocol data is in little-endian format.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He bb1a32f122 kvm tools: Add MACRO for user and tap mode for virtio net 
This patch prepares the user and tap mode for virtio net.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 60d2902cce kvm tools: Introduce uip_rx() for uip 
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>
 2015-06-01 16:39:45 +01:00
Asias He 0c84745800 kvm tools: Introduce uip_tx() for uip 
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>
 2015-06-01 16:39:45 +01:00
Asias He 91b10270c4 kvm tools: Introduce uip_init() for uip 
- Initialize TCP/UDP socket list, ethernet buffer list.

- Allocate memory for ethernet buffer.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 3df5d5938a kvm tools: Add TCP support for uip 
- 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>
 2015-06-01 16:39:45 +01:00
Asias He 89fb0bf807 kvm tools: Implement uip_csum_tcp() to calculate TCP checksum 
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 6bd80bd847 kvm tools: Add helper to allocate and get TCP initial sequence number 
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>
 2015-06-01 16:39:45 +01:00
Asias He c6d1f44cf8 kvm tools: Add helpers to test whether SYN or FIN bit is set. 
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>
 2015-06-01 16:39:45 +01:00
Asias He d5768d2dff kvm tools: Add helper to return start address of TCP payload 
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>
 2015-06-01 16:39:45 +01:00
Asias He 34be5efa92 kvm tools: Add helpers to return TCP {header, total, payload} length 
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>
 2015-06-01 16:39:45 +01:00
Asias He b821664b2e kvm tools: Introduce struct uip_tcp_socket 
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>
 2015-06-01 16:39:45 +01:00
Asias He f2fdf98480 kvm tools: Introduce struct uip_tcp to present TCP package. 
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He dd7a270b55 kvm tools: Add UDP support for uip 
- 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>
 2015-06-01 16:39:45 +01:00
Asias He 07197967df kvm tools: Implement uip_csum_udp() to calculate UDP checksum 
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 39b72fd01d kvm tools: Add helper to return ethernet header length 
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 8df66da791 kvm tools: Add two helpers to return UDP {header, total} length 
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 4768afc6f0 kvm tools: Introduce struct uip_udp_socket 
struct uip_udp_socket is used to present every "connection" between
guest and remote host.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He dfc0655327 kvm tools: Introduce struct uip_pseudo_hdr to present UDP pseudo header 
This pseudo header is used for UDP checksum.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He cbd1f4ac66 kvm tools: Introduce struct uip_udp to present UDP package 
Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 0134a2a7e3 kvm tools: Add ICMP support for uip 
- Introduce struct uip_icmp to present ICMP package

- Implement uip_csum_icmp() to calculate ICMP checksum

- Current ICMP implementation in uip does not really send ICMP package
  to remote host in question, instead it just fake a ICMP reply to fool guest.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He d8db9f85af kvm tools: Implement IP checksum for uip 
Other protocal, e.g. TCP, UDP, ICMP, can use uip_csum() to make
checsksum as well.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 67ba1b25d6 kvm tools: Add IPV4 support for uip 
- Introduce struct uip_ip to present IP package

- Add a helper uip_ip_len() to return totoal length of a IP package

- Add a helper uip_ip_hdrlen() to return the IP header length

- Currently, uip does not support IP options
  Drop IP package if IP header length is not 20 bytes which means it
  contains IP options.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 9f74838ffd kvm tools: Add ARP support for uip 
- Introduce struct uip_arp to present ARP package
- uip_tx_do_arp()
  Clone incoming ARP ethernet frame, if ARP is requesting
  host IP address, tell guest host MAC address.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Asias He 26570aaffb kvm tools: Introduce ethernet frame buffer system for uip 
- uip_buf_get_free()
  Get a free buffer from buffer pool, sleep if there is no free buffer.

- uip_buf_get_used()
  Get a used buffer from buffer pool, sleep if there is no used buffer.

- uip_buf_set_free()
  Set a buffer as free, so it can be reused by the buffer producer.

- uip_buf_set_used()
  Set a buffer as used, uip rx code will inject the ethernet frame in
  this buffer into guest.

- uip_buf_clone()
  Get a free buffer, and clone data into it.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Aneesh Kumar K.V af045e53d1 tools/kvm/9p: Simplify the handler 
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
 2015-06-01 16:39:45 +01:00
Aneesh Kumar K.V 08861bcf44 tools/kvm/virtio: Add new iov helper 
This add the in and out iovec to seperate array

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
 2015-06-01 16:39:45 +01:00
Sasha Levin 714e5b7f9c kvm tools: Implement keyboard reset method 
Implement the keyboard reset method which allows guest kernel
to reboot the guest using the keyboard controller.

This will allow guest kernel to reboot the guest when it needs to,
for example - kernel panic (when passing "panic=1" as kernel parameter).

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Aneesh Kumar K.V b4422bf37b tools/kvm/9p: Add support for multiple 9p export dirs 
Acked-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Sasha Levin 7fca1897f9 kvm tools: Fix attempt to free mmaped memory 
Framebuffer memory which was mmap() is being free() at the shutdown
of the guest, leading to glibc errors.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Pekka Enberg 06761c76a4 kvm tools: Fix 'kvm run' on 32-bit machines with >2 GB of RAM 
This patch fixes the following nasty 'kvm run' startup problem that's caused by
'long' and 'u64' mixup in the code:

  $ ./kvm run
    Fatal: out of memory

Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Prasad Joshi aa400b0039 kvm tools: Add IO delay option 
Add a command line debug option to add a fix amount of delay in read and
write operation.

From Ingo "the delays are *constant* [make sure you use a high-res timers
kernel], so they do not result in nearly as much measurement noise as real
block IO does.
[...]
This way you are basically 'emulating' a real disk drive but you will
emulate uniform latencies, which makes measurements a lot more
reliable - while still relevant to the end result."

Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Sasha Levin 2947270eaa kvm tools: Add 'kvm pause' command 
This patch adds a 'kvm debug' command that's currently an alias for

  kill -USR2 `pidof kvm`

Which pauses a guest (freezes all VCPU threads) or resumes a paused
guest.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:45 +01:00
Pekka Enberg ac1fd498f1 kvm, ui: Kill fb_write() function 
This patch kills fb_write() and related functions because they're no longer
called as of commit 6768f73 ("kvm tools, vesa: Use guest-mapped memory for
framebuffer").

Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: John Floren <john@jfloren.net>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Prasad Joshi 3309045f38 kvm tools: Add QCOW level2 caching support 
QCOW uses two tables level1 (L1) table and level2 (L2) table. The L1 table
points to offset of L2 table. When a QCOW image is probed, the L1 table is
cached in the memory to avoid reading it from disk on every access. This
caching improves the performance.

The similar performance improvement can be observed when L2 tables are cached.
It is impossible to cache all of the L2 tables because of the memory
constraint. The patch adds L2 table caching capability for up to 32 L2 tables,
it uses combination of RB tree and List to manage the L2 cached tables. The
link list implementation helps in building simple LRU structure and RB tree
helps to search cached table efficiently.

To calculate the performance numbers, the VM was started with following
command line arguments

$ ./kvm run -d /dev/shm/kvm_ubuntu_server.qcow2 --params "root=/dev/vda1" \
> -m 2048

Without Cache
=============
$ fio fio-mixed.job
[...]
fio-sync: (groupid=3, jobs=1): err= 0: pid=563
  read : io=102400KB, bw=31239KB/s, iops=429 , runt=  3278msec
    clat (usec): min=4 , max=31668 , avg=1663.94, stdev=1810.37
     lat (usec): min=281 , max=658022 , avg=162456.88, stdev=242272.58
    bw (KB/s) : min=21536, max=29322, per=20.77%, avg=25956.50, stdev=2755.33
  write: io=34688KB, bw=13235KB/s, iops=183 , runt=  2621msec
    clat (usec): min=77 , max=1619 , avg=431.80, stdev=343.81
     lat (usec): min=78 , max=1620 , avg=433.11, stdev=343.83
    bw (KB/s) : min=11168, max=14447, per=26.34%, avg=13246.00, stdev=1293.73
[...]
Run status group 0 (all jobs):
   READ: io=409600KB, aggrb=74594KB/s, minb=19096KB/s, maxb=20917KB/s,
		mint=5013msec, maxt=5491msec
  WRITE: io=139552KB, aggrb=42624KB/s, minb=10263KB/s, maxb=14463KB/s,
		mint=2414msec, maxt=3274msec

Run status group 1 (all jobs):
   READ: io=409600KB, aggrb=146442KB/s, minb=37489KB/s, maxb=48680KB/s,
		mint=2154msec, maxt=2797msec
  WRITE: io=133296KB, aggrb=59613KB/s, minb=15328KB/s, maxb=16774KB/s,
		mint=2041msec, maxt=2236msec

Run status group 2 (all jobs):
   READ: io=409600KB, aggrb=7178KB/s, minb=1837KB/s, maxb=1840KB/s,
		mint=56961msec, maxt=57057msec
  WRITE: io=139136KB, aggrb=2446KB/s, minb=600KB/s, maxb=661KB/s,
		mint=56238msec, maxt=56880msec

Run status group 3 (all jobs):
   READ: io=409600KB, aggrb=124954KB/s, minb=31988KB/s, maxb=37704KB/s,
		mint=2781msec, maxt=3278msec
  WRITE: io=137936KB, aggrb=50286KB/s, minb=12447KB/s, maxb=13885KB/s,
		mint=2621msec, maxt=2743msec

Disk stats (read/write):
  vda: ios=118760/16273, merge=0/107354, ticks=159260/658290, in_queue=817410,
		util=94.37%
[...]

With Cache
==========
$ fio fio-mixed.job
[...]
fio-sync: (groupid=3, jobs=1): err= 0: pid=573
  read : io=102400KB, bw=76704KB/s, iops=1018 , runt=  1335msec
    clat (usec): min=0 , max=66131 , avg=591.46, stdev=2582.59
     lat (usec): min=66 , max=123396 , avg=25609.49, stdev=38397.57
    bw (KB/s) : min=58208, max=59584, per=34.55%, avg=58896.00, stdev=972.98
  write: io=35600KB, bw=29373KB/s, iops=381 , runt=  1212msec
    clat (usec): min=11 , max=2661 , avg=169.58, stdev=191.60
     lat (usec): min=11 , max=2663 , avg=170.91, stdev=191.78
    bw (KB/s) : min=27104, max=37664, per=29.98%, avg=32384.00, stdev=7467.05
[...]
Run status group 0 (all jobs):
   READ: io=409600KB, aggrb=140562KB/s, minb=35984KB/s, maxb=44450KB/s,
		mint=2359msec, maxt=2914msec
  WRITE: io=138816KB, aggrb=124722KB/s, minb=31502KB/s, maxb=40180KB/s,
		mint=893msec, maxt=1113msec

Run status group 1 (all jobs):
   READ: io=409600KB, aggrb=231151KB/s, minb=59174KB/s, maxb=96111KB/s,
		mint=1091msec, maxt=1772msec
  WRITE: io=141936KB, aggrb=137268KB/s, minb=32340KB/s, maxb=44496KB/s,
		mint=813msec, maxt=1034msec

Run status group 2 (all jobs):
   READ: io=409600KB, aggrb=9211KB/s, minb=2358KB/s, maxb=2363KB/s,
		mint=44367msec, maxt=44468msec
  WRITE: io=129808KB, aggrb=2931KB/s, minb=707KB/s, maxb=797KB/s,
		mint=43331msec, maxt=44285msec

Run status group 3 (all jobs):
   READ: io=409600KB, aggrb=170453KB/s, minb=43636KB/s, maxb=78545KB/s,
		mint=1335msec, maxt=2403msec
  WRITE: io=138256KB, aggrb=108012KB/s, minb=27648KB/s, maxb=37931KB/s,
		mint=879msec, maxt=1280msec

Disk stats (read/write):
  vda: ios=120698/16690, merge=0/114742, ticks=113170/304480, in_queue=417560,
		util=93.26%
[...]

Summary
=======
Read  bandwidth increased by 1.2 to 1.8 times
Write bandwidth increased by 1.1 to 2.9 times
Read  latency   decreased by small margin of 0.2
Write latency   decreased by 0.4

Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Pekka Enberg b6f60a8557 kvm tools: Kill libvnc dependency from hw/i8042.c 
This patch kills the libvnc dependency from hw/i8042.c so we can use the same
hardware driver for SDL UI.

Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: John Floren <john@jfloren.net>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Pekka Enberg 96feb58927 kvm tools, vesa: Use guest-mapped memory for framebuffer 
This patch converts hw/vesa.c to use guest-mapped memory for framebuffer and
drops the slow MMIO emulation. This speeds up framebuffer accesses
considerably. Please note that this can be optimized even more with the
KVM_GET_DIRTY_LOG ioctl() as explained by Alexander Graf.

Cc: Alexander Graf <agraf@suse.de>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: John Floren <john@jfloren.net>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Sasha Levin 73f7e5b399 kvm tools: Add MMIO coalescing support 
Coalescing MMIO allows us to avoid an exit every time we have a
MMIO write, instead - MMIO writes are coalesced in a ring which
can be flushed once an exit for a different reason is needed.
A MMIO exit is also trigged once the ring is full.

Coalesce all MMIO regions registered in the MMIO mapper.
Add a coalescing handler under kvm_cpu.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Pekka Enberg 3f838fece3 kvm tools, ui: Add support for SDL framebuffer output target 
This patch adds support for SDL based framebuffer. Use the '--sdl' command line
option to enable the feature.

Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: John Floren <john@jfloren.net>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Pekka Enberg aba1efa5fb kvm tools, ui: Move VNC specific framebuffer code to ui/vnc.c 
This patch makes use of 'struct framebuffer' and moves the VNC code to ui/vnc.c
in preparation for other framebuffer output targets.

Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: John Floren <john@jfloren.net>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00
Pekka Enberg 08e89f1ecd kvm tools, ui: Add framebuffer infrastructure 
This patch introduces 'struct framebuffer' and related API as a preparational
step to killing libvnc dependency from hw/vesa.c.

Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: John Floren <john@jfloren.net>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
 2015-06-01 16:39:44 +01:00