Return the Error object instead of reporting it with
qerror_report_err().
Change callers that assume the function can't fail to pass
&error_abort, so that should the assumption ever break, it'll break
noisily.
Turns out all callers outside its unit test assume that. We could
drop the Error ** argument, but that would make the interface less
regular, so don't.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
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Merge remote-tracking branch 'remotes/kraxel/tags/pull-usb-20150218-1' into staging
usb: error handling fixes from Markus, make sysbus ehci arm-only.
# gpg: Signature made Wed Feb 18 09:54:13 2015 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg: aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg: aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
* remotes/kraxel/tags/pull-usb-20150218-1:
Make sysbus EHCI devices ARM only by default
PPC: Don't use legacy -usbdevice support for setting up board
r2d: Don't use legacy -usbdevice support for setting up board
usb: Change usb_create_simple() to abort on failure
usb: Suppress bogus error when automatic usb-hub creation fails
usb: Do not prefix error_setg() messages with "Error: "
usb: Improve -usbdevice error reporting a bit
usb: usb_create() can't fail, drop useless error handling
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
v2:
* generalized QAPI function definition for guest-memory-block-size
to guest-memory-block-info for future extensibility (Eric)
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Merge remote-tracking branch 'remotes/mdroth/tags/qga-pull-2015-02-16-v2-tag' into staging
tag for qga-pull-2015-02-16-v2
v2:
* generalized QAPI function definition for guest-memory-block-size
to guest-memory-block-info for future extensibility (Eric)
# gpg: Signature made Tue Feb 17 22:36:08 2015 GMT using RSA key ID F108B584
# gpg: Good signature from "Michael Roth <flukshun@gmail.com>"
# gpg: aka "Michael Roth <mdroth@utexas.edu>"
# gpg: aka "Michael Roth <mdroth@linux.vnet.ibm.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: CEAC C9E1 5534 EBAB B82D 3FA0 3353 C9CE F108 B584
* remotes/mdroth/tags/qga-pull-2015-02-16-v2-tag:
qemu-ga-win: Fail loudly on bare 'set-time'
qga: add memory block command that unsupported
qga: implement qmp_guest_get_memory_block_info() for Linux with sysfs
qga: implement qmp_guest_set_memory_blocks() for Linux with sysfs
qga: implement qmp_guest_get_memory_blocks() for Linux with sysfs
qga: introduce three guest memory block commmands with stubs
qga: implement file commands for Windows guest
guest agent: guest-file-open: refactoring
utils: drop strtok_r from envlist_parse
qga: add guest-set-user-password command
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
- RCU: fix MemoryRegion lifetime issues in PCI; document the rules;
convert of AddressSpaceDispatch and RAMList
- KVM: add kvm_exit reasons for aarch64
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
- vhost-scsi: add bootindex property
- RCU: fix MemoryRegion lifetime issues in PCI; document the rules;
convert of AddressSpaceDispatch and RAMList
- KVM: add kvm_exit reasons for aarch64
# gpg: Signature made Mon Feb 16 16:32:32 2015 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* remotes/bonzini/tags/for-upstream: (21 commits)
Convert ram_list to RCU
exec: convert ram_list to QLIST
cosmetic changes preparing for the following patches
exec: protect mru_block with RCU
rcu: add g_free_rcu
rcu: introduce RCU-enabled QLIST
exec: RCUify AddressSpaceDispatch
exec: make iotlb RCU-friendly
exec: introduce cpu_reload_memory_map
docs: clarify memory region lifecycle
pci: split shpc_cleanup and shpc_free
pcie: remove mmconfig memory leak and wrap mmconfig update with transaction
memory: keep the owner of the AddressSpace alive until do_address_space_destroy
rcu: run RCU callbacks under the BQL
rcu: do not let RCU callbacks pile up indefinitely
vhost-scsi: set the bootable value of channel/target/lun
vhost-scsi: add a property for booting
vhost-scsi: expose the TYPE_FW_PATH_PROVIDER interface
vhost-scsi: add bootindex property
qdev: support to get a device firmware path directly
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
v2:
* Fix C11 typedef redefinitions in ahci and libqos malloc [Peter]
* Fix lx -> PRIx64 format specifiers in ahci [Peter]
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Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging
Pull request
v2:
* Fix C11 typedef redefinitions in ahci and libqos malloc [Peter]
* Fix lx -> PRIx64 format specifiers in ahci [Peter]
# gpg: Signature made Mon Feb 16 15:45:53 2015 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>"
* remotes/stefanha/tags/block-pull-request: (65 commits)
block: Keep bdrv_check*_request()'s return value
block: Remove "growable" from BDS
block: Clamp BlockBackend requests
qemu-io: Use BlockBackend
qemu-io: Remove "growable" option
qemu-io: Use blk_new_open() in openfile()
qemu-nbd: Use blk_new_open() in main()
qemu-img: Use BlockBackend as far as possible
qemu-img: Use blk_new_open() in img_rebase()
qemu-img: Use blk_new_open() in img_open()
block/xen: Use blk_new_open() in blk_connect()
blockdev: Use blk_new_open() in blockdev_init()
iotests: Add test for driver=qcow2, format=qcow2
block: Add Error parameter to bdrv_find_protocol()
block: Add blk_new_open()
block: Lift some BDS functions to the BlockBackend
iotests: Add test for qemu-img convert to NBD
qemu-img: Fix qemu-img convert -n
qemu-iotests: Add 093 for IO throttling
qemu-iotests: Allow caller to disable underscore convertion for qmp
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Changes:
* bug fixes, cleanups and minor improvements
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Merge remote-tracking branch 'remotes/lalrae/tags/mips-20150213-2' into staging
MIPS patches 2015-02-13
Changes:
* bug fixes, cleanups and minor improvements
# gpg: Signature made Sat Feb 14 17:01:37 2015 GMT using RSA key ID 0B29DA6B
# gpg: Can't check signature: public key not found
* remotes/lalrae/tags/mips-20150213-2:
linux-user: correct stat structure in MIPS N32
target-mips: pass 0 instead of -1 as rs in microMIPS LUI instruction
target-mips: fix broken snapshotting
target-mips: use CP0EnLo_XI instead of magic number
target-mips: ll and lld cause AdEL exception for unaligned address
target-mips: fix detection of the end of the page during translation
target-mips: Make CP0.Status.CU1 read-only for the 5Kc and 5KEc processors
isa: remove isa_mem_base variable
gt64xxx: remove isa_mem_base usage
piix4: use PCI address space instead of system memory
mips: remove isa_mem_base usage
jazz: remove usage of isa_mem_base
jazz: do not explode QEMUMachineInitArgs structure
isa: add memory space parameter to isa_bus_new
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Some are called do_info_SUBCOMMAND() (old ones, usually), some
hmp_info_SUBCOMMAND(), some SUBCOMMAND_info(), sometimes SUBCOMMAND
pointlessly differs in spelling.
Normalize to hmp_info_SUBCOMMAND(), where SUBCOMMAND is exactly the
subcommand name with '-' replaced by '_'.
Exceptions:
* sun4m_irq_info(), sun4m_pic_info() renamed to sun4m_hmp_info_irq(),
sun4m_hmp_info_pic().
* lm32_irq_info(), lm32_pic_info() renamed to lm32_hmp_info_irq(),
lm32_hmp_info_pic().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Some are called do_COMMAND() (old ones, usually), some hmp_COMMAND(),
and sometimes COMMAND pointlessly differs in spelling.
Normalize to hmp_COMMAND(), where COMMAND is exactly the command name
with '-' replaced by '_'.
Exceptions:
* do_device_add() and client_migrate_info() *not* renamed to
hmp_device_add(), hmp_client_migrate_info(), because they're also
QMP handlers. They still need to be converted to QAPI.
* do_memory_dump(), do_physical_memory_dump(), do_ioport_read(),
do_ioport_write() renamed do hmp_* instead of hmp_x(), hmp_xp(),
hmp_i(), hmp_o(), because those names are too cryptic for my taste.
* do_info_help() renamed to hmp_info_help() instead of hmp_info(),
because it only covers help.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
A number of ARM embedded boards include EHCI USB host controllers which
appear as directly mapped devices, rather than sitting on a PCI bus.
At present code to emulate such devices is included whenever EHCI support
is included. This patch adjusts teh config options to only include them
in builds targetting ARM by default.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
It's tempting, because usbdevice_create() is so simple to use. But
there's a lot of unwanted complexity behind the simple interface.
Switch to usb_create_simple().
Cc: Alexander Graf <agraf@suse.de>
Cc: qemu-ppc@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
It's tempting, because usbdevice_create() is so simple to use. But
there's a lot of unwanted complexity behind the simple interface.
Switch to usb_create_simple().
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Instead of returning null pointer. Matches pci_create_simple(),
isa_create_simple(), sysbus_create_simple(). It's unused since the
previous commit, but I'll put it to use again shortly.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
USBDevice's realize method usb_qdev_realize() automatically creates a
usb-hub when only one port is left. Creating devices in realize
methods is questionable, but works.
If usb-hub creation fails, an error is reported to stderr, but the
failure is otherwise ignored. We then create the actual device using
the last port, which may well succeed.
Example:
$ qemu -nodefaults -S -display none -machine usb=on -monitor stdio
QEMU 2.2.50 monitor - type 'help' for more information
(qemu) device_add usb-mouse
[Repeat 36 times]
(qemu) info usb
Device 0.0, Port 1, Speed 12 Mb/s, Product QEMU USB Mouse
Device 0.0, Port 2, Speed 12 Mb/s, Product QEMU USB Hub
Device 0.0, Port 2.1, Speed 12 Mb/s, Product QEMU USB Mouse
[More mice and hubs omitted...]
Device 0.0, Port 2.8.8.8.8.7, Speed 12 Mb/s, Product QEMU USB Mouse
(qemu) device_add usb-mouse
usb hub chain too deep
Failed to initialize USB device 'usb-hub'
(qemu) info usb
[...]
Device 0.0, Port 2.8.8.8.8.7, Speed 12 Mb/s, Product QEMU USB Mouse
Device 0.0, Port 2.8.8.8.8.8, Speed 12 Mb/s, Product QEMU USB Mouse
Despite the "Failed" message, the command actually succeeded.
In QMP, it's worse. When adding the 37th mouse via QMP, the command
fails with
{"error": {"class": "GenericError", "desc": "usb hub chain too deep"}}
Additionally, "Failed to initialize USB device 'usb-hub'" is reported
on stderr. Despite the command failure, the device was created. This
is wrong.
Fix by avoiding qdev_init() for usb-hub creation, so we can ignore
errors cleanly.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Because it produces beauties like
(qemu) usb_add mouse
Failed to initialize USB device 'usb-mouse': Error: tried to attach usb device QEMU USB Mouse to a bus with no free ports
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Most LegacyUSBFactory usbdevice_init() methods realize with
qdev_init_nofail(), even though their caller usbdevice_create() can
handle failure. Okay if it really can't fail (I didn't check), but
somewhat brittle.
usb_msd_init() and usb_bt_init() call qdev_init(). The latter
additionally reports an error when qdev_init() fails.
Realization failure produces multiple error reports: a specific one
from qdev_init(), and generic ones from usb_bt_init(),
usb_create_simple(), usbdevice_create() and usb_parse().
Remove realization from the usbdevice_init() methods. Realize in
usbdevice_create(), and produce exactly one error message there. You
still get another one from usb_parse().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err() in legacy chardev parser
qemu_chr_parse_compat(). Legacy chardev syntax is not to be used in
QMP.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err() in initial startup helpers
machine_set_property() and object_create().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err() in initial startup helper
configure_tpm().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err() in initial startup helper
numa_init_func() and board setup helper
memory_region_allocate_system_memory().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err() in HMP command handler
hmp_host_net_add() and initial startup helpers net_init_client(),
net_init_netdev(). Keep it in QMP command handler qmp_netdev_add().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
qerror_report_err() is a transitional interface to help with
converting existing monitor commands to QMP. It should not be used
elsewhere. Replace by error_report_err() in HMP command handler
hmp_trace_event().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
monitor_handle_fd_param() is a wrapper around
monitor_handle_fd_param2() that feeds errors to qerror_report_err()
instead of returning them. qerror_report_err() is inappropriate in
many contexts. monitor_handle_fd_param() looks simpler than
monitor_handle_fd_param2(), which tempts use. Remove the temptation:
drop the wrapper and open-code the (trivial) error handling instead.
Replace the open-coded qerror_report_err() by error_report_err() in
places that already use error_report(). Turns out that's everywhere.
While there, rename monitor_handle_fd_param2() to monitor_fd_param().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
I've typed error_report("%s", error_get_pretty(ERR)) too many times
already, and I've fixed too many instances of qerror_report_err(ERR)
to error_report("%s", error_get_pretty(ERR)) as well. Capture the
pattern in a convenience function.
Since it's almost invariably followed by error_free(), stuff that into
the convenience function as well.
The next patch will put it to use.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
We get two error messages: one from monitor_handle_fd_param2(), and
another one from vhost_scsi_realize(). The second one gets suppressed
in QMP context.
That's because monitor_handle_fd_param() calls qerror_report_err().
Calling qerror_report_err() is always inappropriate in realize
methods, because it doesn't return the Error object. It either
reports the error to stderr or the human monitor, or it stores it in
the QMP monitor, where it makes the QMP command fail even when the
realize method ignores the error and succeeds. Fortunately,
vhost_scsi_realize() doesn't do that.
Fix by switching to monitor_handle_fd_param2().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
The command is not implemented correctly yet. The documentation allows
to not pass any value to set, in which case the time is re-read from
RTC. However, reading CMOS on Windows is not trivial to implement. So
instead of pretending we've set the correct time, fail explicitly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
For memory block command, we only support for linux with sysfs.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This conveys general information about guest memory blocks. Currently,
just the memory block size.
The size of a memory block is architecture dependent, it represents the logical
unit upon which memory online/offline operations are to be performed.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
*generalized guest-get-memory-block-size to get-get-memory-block-info
for future extensibility
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
We can change guest's online/offline state of memory blocks, by using
command 'guest-set-memory-blocks'.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
We can get guest's memory block information by using command
"guest-get-memory-blocks", the returned value contains a list of memory block
info, such as phys-index, online state, can-offline info.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
*replaced guest-triggerable assertion with an error msg
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Introduce three new guest commands:
guest-get-memory-blocks, guest-set-memory-blocks, guest-get-memory-block-size.
With these three commands, we can support online/offline guest's memory block
(logical memory hotplug/unplug) as required from host.
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
*generalized guest-get-memory-block-size to get-get-memory-block-info
for future extensibility
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
The following commands are implemented:
- guest_file_open
- guest_file_close
- guest_file_write
- guest_file_read
- guest_file_seek
- guest_file_flush
Motivation is quite simple: Windows guests should be supported with the
same set of features as Linux one. Also this patch is a prerequisite for
Windows guest-exec command support.
Signed-off-by: Olga Krishtal <okrishtal@parallels.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Moved the code that sets non-blocking flag on fd into a separate function.
Signed-off-by: Simon Zolin <szolin@parallels.com>
Reviewed-by: Roman Kagan <rkagan@parallels.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Michael Roth <mdroth@linux.vnet.ibm.com>
CC: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
The problem is that mingw 4.9.1 fails to compile the code with the
following warning:
/mingw/include/string.h:88:9: note: previous declaration of 'strtok_r'
was here
char *strtok_r(char * __restrict__ _Str,
const char * __restrict__ _Delim,
char ** __restrict__ __last);
/include/sysemu/os-win32.h:83:7: warning: redundant redeclaration of
'strtok_r' [-Wredundant-decls]
char *strtok_r(char *str, const char *delim, char **saveptr);
The problem is that compiles just fine on previous versions of mingw.
Compiler version check here is not a good idea. Though fortunately
strtok_r is used only once in the code and we could simply rewrite
the code without it.
Signed-off-by: Olga Krishtal <okrishtal@parallels.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Eric Blake <eblake@redhat.com>
CC: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Add a new 'guest-set-user-password' command for changing the password
of guest OS user accounts. This command is needed to enable OpenStack
to support its API for changing the admin password of guests running
on KVM/QEMU. It is not practical to provide a command at the QEMU
level explicitly targetting administrator account password change
only, since different guest OS have different names for the admin
account. While UNIX systems use 'root', Windows systems typically
use 'Administrator' and even that can be renamed. Higher level apps
like OpenStack have the ability to figure out the correct admin
account name since they have info that QEMU/libvirt do not.
The command accepts either the clear text password string, encoded
in base64 to make it 8-bit safe in JSON:
$ echo -n "123456" | base64
MTIzNDU2
$ virsh -c qemu:///system qemu-agent-command f21x86_64 \
'{ "execute": "guest-set-user-password",
"arguments": { "crypted": false,
"username": "root",
"password": "MTIzNDU2" } }'
{"return":{}}
Or a password that has already been run though a crypt(3) like
algorithm appropriate for the guest, again then base64 encoded:
$ echo -n '$6$n01A2Tau$e...snip...DfMOP7of9AJ1I8q0' | base64
JDYkb...snip...YT2Ey
$ virsh -c qemu:///system qemu-agent-command f21x86_64 \
'{ "execute": "guest-set-user-password",
"arguments": { "crypted": true,
"username": "root",
"password": "JDYkb...snip...YT2Ey" } }'
NB windows support is desirable, but not implemented in this
patch.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Allow "unlocked" reads of the ram_list by using an RCU-enabled QLIST.
The ramlist mutex is kept. call_rcu callbacks are run with the iothread
lock taken, but that may change in the future. Writers still take the
ramlist mutex, but they no longer need to assume that the iothread lock
is taken.
Readers of the list, instead, no longer require either the iothread
or ramlist mutex, but they need to use rcu_read_lock() and
rcu_read_unlock().
One place in arch_init.c was downgrading from write side to read side
like this:
qemu_mutex_lock_iothread()
qemu_mutex_lock_ramlist()
...
qemu_mutex_unlock_iothread()
...
qemu_mutex_unlock_ramlist()
and the equivalent idiom is:
qemu_mutex_lock_ramlist()
rcu_read_lock()
...
qemu_mutex_unlock_ramlist()
...
rcu_read_unlock()
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Mike Day <ncmike@ncultra.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
QLIST has RCU-friendly primitives, so switch to it.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Mike Day <ncmike@ncultra.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add RCU-enabled variants on the existing bsd DQ facility. Each
operation has the same interface as the existing (non-RCU)
version. Also, each operation is implemented as macro.
Using the RCU-enabled QLIST, existing QLIST users will be able to
convert to RCU without using a different list interface.
Signed-off-by: Mike Day <ncmike@ncultra.org>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Note that even after this patch, most callers of address_space_*
functions must still be under the big QEMU lock, otherwise the memory
region returned by address_space_translate can disappear as soon as
address_space_translate returns. This will be fixed in the next part
of this series.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
After the previous patch, TLBs will be flushed on every change to
the memory mapping. This patch augments that with synchronization
of the MemoryRegionSections referred to in the iotlb array.
With this change, it is guaranteed that iotlb_to_region will access
the correct memory map, even once the TLB will be accessed outside
the BQL.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This for now is a simple TLB flush. This can change later for two
reasons:
1) an AddressSpaceDispatch will be cached in the CPUState object
2) it will not be possible to do tlb_flush once the TCG-generated code
runs outside the BQL.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Markus Armbruster
Peter Maydell
David Gibson
Michal Privoznik
zhanghailiang
Olga Krishtal
Simon Zolin
Daniel P. Berrange
Mike Day
Paolo Bonzini