According to ICH9 spec, the MSI capability is located at 0x60. This is
important for guest drivers that do not parse the capability chain and
use absolute addresses instead.
CC: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Yet identical to 2.1.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The spec says (and real HW confirms this) that, if the bus master bit
is 0, the device will not generate any PCI accesses. MSI and MSI-X
messages fall among these, so we should use the corresponding address
space to deliver them. This will prevent delivery if bus master support
is disabled.
Cc: qemu-stable@nongnu.org
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Add some trace events to virtio-rng for easier debugging
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This adds a couple of tcg specific trace-events which are useful for
tracing execution though tcg generated blocks. It's been tested with
lttng user space tracing but is generic enough for all systems. The tcg
events are:
* translate_block - when a subject block is translated
* exec_tb - when a translated block is entered
* exec_tb_exit - when we exit the translated code
* exec_tb_nocache - special case translations
Of course we can only trace the entrance to the first block of a chain
as each block will jump directly to the next when it can. See the -d
nochain patch to allow more complete tracing at the expense of
performance.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This makes the UST backend pay attention to the format string arguments
that are defined when defining payload data. With this you can now
ensure integers are reported in hex mode if you want.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Otherwise the user has to explicitly include an auto-generated header.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Generate header "trace/generated-tcg-tracers.h" with the necessary routines for
tracing events in guest code:
* trace_${event}_tcg
Convenience wrapper that calls the translation-time tracer
'trace_${event}_trans', and calls 'gen_helper_trace_${event}_exec to
generate the TCG code to later trace the event at execution time.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Generates header "trace/generated-helpers-wrappers.h" with definitions for TCG
helper wrappers.
These wrappers ('gen_helper_trace_${event}_exec_wrapper') transform mixed native
and TCG argument types to TCG types and call the actual TCG helpers
('gen_helper_trace_${event}_exec_proxy').
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Generates file "trace/generated-helpers.c" with TCG helper definitions to trace
events in guest code at execution time.
The helpers ('helper_trace_${event}_exec_proxy') cast the TCG-compatible native
argument types to their original types (as defined in "trace-events") and call
the tracing routine ('trace_${event}_exec').
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Generates file "trace/generated-helpers.h" with TCG helper declarations to trace
events in guest code at execution time ('trace_${event}_exec_proxy').
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The simpletrace SystemTap tapset outputs simpletrace binary traces for
SystemTap probes. This is useful because SystemTap has no default way
to format or store traces. The simpletrace SystemTap tapset provides an
easy way to store traces.
The simpletrace.py tool or custom Python scripts using the
simpletrace.py API can analyze SystemTap these traces:
$ ./configure --enable-trace-backends=dtrace ...
$ make && make install
$ stap -e 'probe qemu.system.x86_64.simpletrace.* {}' \
-c qemu-system-x86_64 >/tmp/trace.out
$ scripts/simpletrace.py --no-header trace-events /tmp/trace.out
g_malloc 4.531 pid=15519 size=0xb ptr=0x7f8639c10470
g_malloc 3.264 pid=15519 size=0x300 ptr=0x7f8639c10490
g_free 5.155 pid=15519 ptr=0x7f8639c0f7b0
Note that, unlike qemu-system-x86_64.stp and
qemu-system-x86_64.stp-installed, only one file is needed since the
simpletrace SystemTap tapset does not reference the QEMU binary by path.
Therefore it doesn't matter whether the QEMU binary is installed or not.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
It can be useful to read simpletrace files that have no header. For
example, a ring buffer may not have a header record but can still be
processed if the user is sure the file format version is compatible.
$ scripts/simpletrace.py --no-header trace-events trace-file
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This new tracetool "format" generates a SystemTap .stp file that outputs
simpletrace binary trace data.
In contrast to simpletrace or ftrace, SystemTap does not define its own
trace format. All output from SystemTap is generated by .stp files.
This patch lets us generate a .stp file that outputs in the simpletrace
binary format.
This makes it possible to reuse simpletrace.py to analyze traces
recorded using SystemTap. The simpletrace binary format is especially
useful for long-running traces like flight-recorder mode where string
formatting can be expensive.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
SystemTap reserved words sometimes conflict with QEMU variable names.
We escape them to prevent conflicts.
Move escaping into its own function so the next patch can reuse it.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
These three objects are repeated in multiple times in Makefiles. Let's
just add them to libqemuutil.a, and don't list explicitly elsewhere.
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
getchar() is a standard c library function which may return with failure
(e.g. -1), so like another platforms, also need check it under WIN32.
And make the related code match current qemu code styles, too.
Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This fixes a warning from smatch (static code analyser).
Fix also the comment with the renamed source file name.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
hw/timer/tusb6010.c | 3 ---
include/hw/usb.h | 7 ++++++-
2 files changed, 6 insertions(+), 4 deletions(-)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
When live migrate fails due to a section length mismatch we currently
see an error message like:
Length mismatch: 0000:00:03.0/virtio-net-pci.rom: 10000 in != 20000
The section lengths are in fact in hex, so this should read
Length mismatch: 0000:00:03.0/virtio-net-pci.rom: 0x10000 in != 0x20000
Correct the error string to reflect this.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Some non-linux systems, for example a system with
FreeBSD kernel and glibc, may declare struct mmsghdr
(in glibc) but may not have linux-specific header
file linux/ip.h. The actual implementation in qemu
includes this linux-specific header file unconditionally,
so compilation fails if it is not present. Include
this header in the configure test too.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
The symbol TIMER_MAX used in imx_epit.c and imx_gpt.c
clashes with system symbol with the same name. Because
all qemu source files includes qemu-common.h which, in
turn, includes limits.h, which is not unusual to define
it. Rename local symbol to have a reasonable prefix.
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Currently management softwares cannot know whether a qemu-ga command is
supported or not on the running platform until they actually execute it.
This patch disables unsupported commands at launch time of qemu-ga, so that
management softwares can check whether they are supported from 'enabled'
property of the result from 'guest-info' command.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Add command to get mounted filesystems information in the guest.
The returned value contains a list of mountpoint paths and
corresponding disks info such as disk bus type, drive address,
and the disk controllers' PCI addresses, so that management layer
such as libvirt can resolve the disk backends.
For example, when `lsblk' result is:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdb 8:16 0 1G 0 disk
`-sdb1 8:17 0 1024M 0 part
`-vg0-lv0 253:1 0 1.4G 0 lvm /mnt/test
sdc 8:32 0 1G 0 disk
`-sdc1 8:33 0 512M 0 part
`-vg0-lv0 253:1 0 1.4G 0 lvm /mnt/test
vda 252:0 0 25G 0 disk
`-vda1 252:1 0 25G 0 part /
where sdb is a SCSI disk with PCI controller 0000:00:0a.0 and ID=1,
sdc is an IDE disk with PCI controller 0000:00:01.1, and
vda is a virtio-blk disk with PCI device 0000:00:06.0,
guest-get-fsinfo command will return the following result:
{"return":
[{"name":"dm-1",
"mountpoint":"/mnt/test",
"disk":[
{"bus-type":"scsi","bus":0,"unit":1,"target":0,
"pci-controller":{"bus":0,"slot":10,"domain":0,"function":0}},
{"bus-type":"ide","bus":0,"unit":0,"target":0,
"pci-controller":{"bus":0,"slot":1,"domain":0,"function":1}}],
"type":"xfs"},
{"name":"vda1", "mountpoint":"/",
"disk":[
{"bus-type":"virtio","bus":0,"unit":0,"target":0,
"pci-controller":{"bus":0,"slot":6,"domain":0,"function":0}}],
"type":"ext4"}]}
In Linux guest, the disk information is resolved from sysfs. So far,
it only supports virtio-blk, virtio-scsi, IDE, SATA, SCSI disks on x86
hosts, and "disk" parameter may be empty for unsupported disk types.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
*updated schema to report 2.2 as initial supported version
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
If an array of mount point paths is specified as 'mountpoints' argument
of guest-fsfreeze-freeze-list, qemu-ga will only freeze the file systems
mounted on specified paths in Linux guests. Otherwise, it works as the
same way as guest-fsfreeze-freeze.
This would be useful when the host wants to create partial disk snapshots.
Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
*updated schema to report 2.2 as initial supported version
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
ARM kvm-unit-tests. icount include the first part of reverse execution
and Sebastian Tanase's patches to slow down -icount execution to the
desired speed of the target.
v1->v2: fix dump_drift_info to print nothing outside icount mode,
and to compile on 32-bit architectures
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
KVM changes include a MIPS patch and the testdev backend used by the
ARM kvm-unit-tests. icount include the first part of reverse execution
and Sebastian Tanase's patches to slow down -icount execution to the
desired speed of the target.
v1->v2: fix dump_drift_info to print nothing outside icount mode,
and to compile on 32-bit architectures
# gpg: Signature made Thu 07 Aug 2014 14:09:58 BST using RSA key ID 9B4D86F2
# gpg: Good signature from "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: aka "Paolo Bonzini <bonzini@gnu.org>"
* remotes/bonzini/tags/for-upstream:
target-mips: Ignore unassigned accesses with KVM
monitor: Add drift info to 'info jit'
cpu-exec: Print to console if the guest is late
cpu-exec: Add sleeping algorithm
icount: Add align option to icount
icount: Add QemuOpts for icount
icount: Fix virtual clock start value on ARM
timer: add cpu_icount_to_ns function.
migration: migrate icount fields.
icount: put icount variables into TimerState.
backends: Introduce chr-testdev
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
MIPS registers an unassigned access handler which raises a guest bus
error exception. However this causes QEMU to crash when KVM is enabled
as it isn't called from the main execution loop so longjmp() gets called
without a corresponding setjmp().
Until the KVM API can be updated to trigger a guest exception in
response to an MMIO exit, prevent the bus error exception being raised
from mips_cpu_unassigned_access() if KVM is enabled.
The check is at run time since the do_unassigned_access callback is
initialised before it is known whether KVM will be enabled.
The problem can be triggered with Malta emulation by making the guest
write to the reset region at physical address 0x1bf00000, since it is
marked read-only which is treated as unassigned for writes.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Show in 'info jit' the current delay between the host clock
and the guest clock. In addition, print the maximum advance
and delay of the guest compared to the host.
Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr>
Tested-by: Camille Bégué <camille.begue@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If the align option is enabled, we print to the user whenever
the guest clock is behind the host clock in order for he/she
to have a hint about the actual performance. The maximum
print interval is 2s and we limit the number of messages to 100.
If desired, this can be changed in cpu-exec.c
Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr>
Tested-by: Camille Bégué <camille.begue@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The goal is to sleep qemu whenever the guest clock
is in advance compared to the host clock (we use
the monotonic clocks). The amount of time to sleep
is calculated in the execution loop in cpu_exec.
At first, we tried to approximate at each for loop the real time elapsed
while searching for a TB (generating or retrieving from cache) and
executing it. We would then approximate the virtual time corresponding
to the number of virtual instructions executed. The difference between
these 2 values would allow us to know if the guest is in advance or delayed.
However, the function used for measuring the real time
(qemu_clock_get_ns(QEMU_CLOCK_REALTIME)) proved to be very expensive.
We had an added overhead of 13% of the total run time.
Therefore, we modified the algorithm and only take into account the
difference between the 2 clocks at the begining of the cpu_exec function.
During the for loop we try to reduce the advance of the guest only by
computing the virtual time elapsed and sleeping if necessary. The overhead
is thus reduced to 3%. Even though this method still has a noticeable
overhead, it no longer is a bottleneck in trying to achieve a better
guest frequency for which the guest clock is faster than the host one.
As for the the alignement of the 2 clocks, with the first algorithm
the guest clock was oscillating between -1 and 1ms compared to the host clock.
Using the second algorithm we notice that the guest is 5ms behind the host, which
is still acceptable for our use case.
The tests where conducted using fio and stress. The host machine in an i5 CPU at
3.10GHz running Debian Jessie (kernel 3.12). The guest machine is an arm versatile-pb
built with buildroot.
Currently, on our test machine, the lowest icount we can achieve that is suitable for
aligning the 2 clocks is 6. However, we observe that the IO tests (using fio) are
slower than the cpu tests (using stress).
Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr>
Tested-by: Camille Bégué <camille.begue@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The align option is used for activating the align algorithm
in order to synchronise the host clock and the guest clock.
Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr>
Tested-by: Camille Bégué <camille.begue@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make icount parameter use QemuOpts style options in order
to easily add other suboptions.
Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr>
Tested-by: Camille Bégué <camille.begue@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When using the icount option on ARM, the virtual
clock starts counting at realtime clock but it
should start at 0.
The reason why the virtual clock starts at realtime clock
is because the first time we call qemu_clock_warp (which
calls icount_warp_rt) in tcg_exec_all, qemu_icount_bias
(which is part of the virtual time computation mechanism)
will increment by realtime - vm_clock_warp_start, with
vm_clock_warp_start being 0 (see icount_warp_rt in cpus.c).
By changing the value of vm_clock_warp_start from 0 to -1,
the first time we call qemu_clock_warp which calls
icount_warp_rt, we will return immediatly because
icount_warp_rt first checks if vm_clock_warp_start is -1
and if it's the case it returns. Therefore, qemu_icount_bias
will first be incremented by the value of a virtual timer
deadline when the virtual cpu goes from active to inactive.
The virtual time will start at 0 and increment based
on the instruction counter when the vcpu is active or
the qemu_icount_bias value when inactive.
Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This adds cpu_icount_to_ns function which is needed for reverse execution.
It returns the time for a specific instruction.
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This fixes a bug where qemu_icount and qemu_icount_bias are not migrated.
It adds a subsection "timer/icount" to vmstate_timers so icount is migrated only
when needed.
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This puts qemu_icount and qemu_icount_bias into TimerState structure to allow
them to be migrated.
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
From: Paolo Bonzini <pbonzini@redhat.com>
chr-testdev enables a virtio serial channel to be used for guest
initiated qemu exits. hw/misc/debugexit already enables guest
initiated qemu exits, but only for PC targets. chr-testdev supports
any virtio-capable target. kvm-unit-tests/arm is already making use
of this backend.
Currently there is a single command implemented, "q". It takes a
(prefix) argument for the exit code, thus an exit is implemented by
writing, e.g. "1q", to the virtio-serial port.
It can be used as:
$QEMU ... \
-device virtio-serial-device \
-device virtserialport,chardev=ctd -chardev testdev,id=ctd
or, use:
$QEMU ... \
-device virtio-serial-device \
-device virtconsole,chardev=ctd -chardev testdev,id=ctd
to bind it to virtio-serial port0.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit 40509f7f added a test to avoid updating KVM MSI routes when the
MSIMessage is unchanged and f4d45d47 switched to relying on this
rather than doing our own comparison. Our cached msg is effectively
unused now. Remove it.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
When new MSI-X vectors are enabled we need to disable MSI-X and
re-enable it with the correct number of vectors. That means we need
to reprogram the eventfd triggers for each vector. Prior to f4d45d47
vector->use tracked whether a vector was masked or unmasked and we
could always pick the KVM path when available for unmasked vectors.
Now vfio doesn't track mask state itself and vector->use and virq
remains configured even for masked vectors. Therefore we need to ask
the MSI-X code whether a vector is masked in order to select the
correct signaling path. As noted in the comment, MSI relies on
hardware to handle masking.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Cc: qemu-stable@nongnu.org # QEMU 2.1
* Set PC correctly when loading AArch64 ELF files
* sdhci: Fix ADMA dma_memory_read access
* some more foundational work for EL2/EL3 support
* fix bugs which reveal themselves if the TARGET_PAGE_SIZE
is not set to 1K
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20140804' into staging
target-arm queue:
* Set PC correctly when loading AArch64 ELF files
* sdhci: Fix ADMA dma_memory_read access
* some more foundational work for EL2/EL3 support
* fix bugs which reveal themselves if the TARGET_PAGE_SIZE
is not set to 1K
# gpg: Signature made Mon 04 Aug 2014 14:51:34 BST using RSA key ID 14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
* remotes/pmaydell/tags/pull-target-arm-20140804:
target-arm: A64: fix TLB flush instructions
target-arm: don't hardcode mask values in arm_cpu_handle_mmu_fault
target-arm: Fix bit test in sp_el0_access
target-arm: Add FAR_EL2 and 3
target-arm: Add ESR_EL2 and 3
target-arm: Make far_el1 an array
target-arm: A64: Respect SPSEL when taking exceptions
target-arm: A64: Respect SPSEL in ERET SP restore
target-arm: A64: Break out aarch64_save/restore_sp
sd: sdhci: Fix ADMA dma_memory_read access
hw/arm/virt: formatting: memory map
hw/arm/boot: Set PC correctly when loading AArch64 ELF files
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
