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* block: Separate blk_is_writable() and blk_supports_write_perm()Kevin Wolf2021-01-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, blk_is_read_only() tells whether a given BlockBackend can only be used in read-only mode because its root node is read-only. Some callers actually try to answer a slightly different question: Is the BlockBackend configured to be writable, by taking write permissions on the root node? This can differ, for example, for CD-ROM devices which don't take write permissions, but may be backed by a writable image file. scsi-cd allows write requests to the drive if blk_is_read_only() returns false. However, the write request will immediately run into an assertion failure because the write permission is missing. This patch introduces separate functions for both questions. blk_supports_write_perm() answers the question whether the block node/image file can support writable devices, whereas blk_is_writable() tells whether the BlockBackend is currently configured to be writable. All calls of blk_is_read_only() are converted to one of the two new functions. Fixes: https://bugs.launchpad.net/bugs/1906693 Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20210118123448.307825-2-kwolf@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qdev: Move softmmu properties to qdev-properties-system.hEduardo Habkost2020-12-181-0/+1
| | | | | | | | | | | Move the property types and property macros implemented in qdev-properties-system.c to a new qdev-properties-system.h header. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20201211220529.2290218-16-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
* Use OBJECT_DECLARE_SIMPLE_TYPE when possibleEduardo Habkost2020-09-181-3/+1Star
| | | | | | | | | | | | | This converts existing DECLARE_INSTANCE_CHECKER usage to OBJECT_DECLARE_SIMPLE_TYPE when possible. $ ./scripts/codeconverter/converter.py -i \ --pattern=AddObjectDeclareSimpleType $(git grep -l '' -- '*.[ch]') Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Paul Durrant <paul@xen.org> Message-Id: <20200916182519.415636-6-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
* Use DECLARE_*CHECKER* macrosEduardo Habkost2020-09-091-1/+2
| | | | | | | | | | | | | | | Generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=TypeCheckMacro $(git grep -l '' -- '*.[ch]') Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-12-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-13-ehabkost@redhat.com> Message-Id: <20200831210740.126168-14-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
* Move QOM typedefs and add missing includesEduardo Habkost2020-09-091-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some typedefs and macros are defined after the type check macros. This makes it difficult to automatically replace their definitions with OBJECT_DECLARE_TYPE. Patch generated using: $ ./scripts/codeconverter/converter.py -i \ --pattern=QOMStructTypedefSplit $(git grep -l '' -- '*.[ch]') which will split "typdef struct { ... } TypedefName" declarations. Followed by: $ ./scripts/codeconverter/converter.py -i --pattern=MoveSymbols \ $(git grep -l '' -- '*.[ch]') which will: - move the typedefs and #defines above the type check macros - add missing #include "qom/object.h" lines if necessary Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-9-ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-Id: <20200831210740.126168-10-ehabkost@redhat.com> Message-Id: <20200831210740.126168-11-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
* qdev: set properties with device_class_set_props()Marc-André Lureau2020-01-241-1/+1
| | | | | | | | | | | | | | | | | | | | | The following patch will need to handle properties registration during class_init time. Let's use a device_class_set_props() setter. spatch --macro-file scripts/cocci-macro-file.h --sp-file ./scripts/coccinelle/qdev-set-props.cocci --keep-comments --in-place --dir . @@ typedef DeviceClass; DeviceClass *d; expression val; @@ - d->props = val + device_class_set_props(d, val) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20200110153039.1379601-20-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* vmstate: replace DeviceState with VMStateIfMarc-André Lureau2020-01-061-1/+1
| | | | | | | | | Replace DeviceState dependency with VMStateIf on vmstate API. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Acked-by: Halil Pasic <pasic@linux.ibm.com>
* Include hw/qdev-properties.h lessMarkus Armbruster2019-08-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | In my "build everything" tree, changing hw/qdev-properties.h triggers a recompile of some 2700 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). Many places including hw/qdev-properties.h (directly or via hw/qdev.h) actually need only hw/qdev-core.h. Include hw/qdev-core.h there instead. hw/qdev.h is actually pointless: all it does is include hw/qdev-core.h and hw/qdev-properties.h, which in turn includes hw/qdev-core.h. Replace the remaining uses of hw/qdev.h by hw/qdev-properties.h. While there, delete a few superfluous inclusions of hw/qdev-core.h. Touching hw/qdev-properties.h now recompiles some 1200 objects. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Daniel P. Berrangé" <berrange@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20190812052359.30071-22-armbru@redhat.com>
* Include migration/vmstate.h lessMarkus Armbruster2019-08-161-0/+1
| | | | | | | | | | | | | | | | | | In my "build everything" tree, changing migration/vmstate.h triggers a recompile of some 2700 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). hw/hw.h supposedly includes it for convenience. Several other headers include it just to get VMStateDescription. The previous commit made that unnecessary. Include migration/vmstate.h only where it's still needed. Touching it now recompiles only some 1600 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-16-armbru@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
* Include qemu/module.h where needed, drop it from qemu-common.hMarkus Armbruster2019-06-121-1/+1
| | | | | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-4-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c; ui/cocoa.m fixed up]
* block/noenand: Convert sysbus init function to realize functionMao Zhongyi2018-12-131-9/+7Star
| | | | | | | | | | | | | | | Use DeviceClass rather than SysBusDeviceClass in onenand_class_init(). Cc: kwolf@redhat.com Cc: mreitz@redhat.com Cc: qemu-block@nongnu.org Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com> Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181130093852.20739-3-maozhongyi@cmss.chinamobile.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* hw/block/onenand: use qemu_log_mask() for reportingPeter Maydell2018-11-191-9/+13
| | | | | | | | | | | | | | | | | Update the onenand device to use qemu_log_mask() for reporting guest errors and unimplemented features, rather than plain fprintf() and hw_error(). (We leave the hw_error() in onenand_reset(), as that is triggered by a failure to read the underlying block device for the bootRAM, not by guest action.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181115143535.5885-3-peter.maydell@linaro.org
* hw/block/onenand: Fix off-by-one error allowing out-of-bounds readPeter Maydell2018-11-191-1/+1
| | | | | | | | | | | | | | | | | An off-by-one error in a switch case in onenand_read() allowed a misbehaving guest to read off the end of a block of memory. NB: the onenand device is used only by the "n800" and "n810" machines, which are usable only with TCG, not KVM, so this is not a security issue. Reported-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20181115143535.5885-2-peter.maydell@linaro.org Suggested-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* hw: Do not include "sysemu/blockdev.h" if it is not necessaryPhilippe Mathieu-Daudé2018-06-011-1/+0Star
| | | | | | | | | | | | | | | | | Remove those unneeded includes to speed up the compilation process a little bit. Code change produced with: $ git grep '#include "sysemu/blockdev.h"' | \ cut -d: -f-1 | \ xargs egrep -L "(BlockInterfaceType|DriveInfo|drive_get|blk_legacy_dinfo|blockdev_mark_auto_del)" | \ xargs sed -i.bak '/#include "sysemu\/blockdev.h"/d' Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20180528232719.4721-15-f4bug@amsat.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* hw: Do not include "exec/address-spaces.h" if it is not necessaryPhilippe Mathieu-Daudé2018-06-011-1/+0Star
| | | | | | | | | | | | | Code change produced with: $ git grep '#include "exec/address-spaces.h"' hw include/hw | \ cut -d: -f-1 | \ xargs egrep -L "(get_system_|address_space_)" | \ xargs sed -i.bak '/#include "exec\/address-spaces.h"/d' Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20180528232719.4721-12-f4bug@amsat.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* Fixes after renaming __FUNCTION__ to __func__Alistair Francis2018-01-221-1/+1
| | | | | | | Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Cc: Eric Blake <eblake@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
* Replace all occurances of __FUNCTION__ with __func__Alistair Francis2018-01-221-4/+4
| | | | | | | | | | | | | | | | Replace all occurs of __FUNCTION__ except for the check in checkpatch with the non GCC specific __func__. One line in hcd-musb.c was manually tweaked to pass checkpatch. Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> [THH: Removed hunks related to pxa2xx_mmci.c (fixed already)] Signed-off-by: Thomas Huth <thuth@redhat.com>
* hw/block/onenand: Remove dead code blockThomas Huth2017-10-061-4/+0Star
| | | | | | | | | | | The condition of the for-loop makes sure that b is always smaller than s->blocks, so the "if (b >= s->blocks)" statement is completely superfluous here. Buglink: https://bugs.launchpad.net/qemu/+bug/1715007 Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* migration: pre_save return intDr. David Alan Gilbert2017-09-271-1/+3
| | | | | | | | | | | | | | | | | | | Modify the pre_save method on VMStateDescription to return an int rather than void so that it potentially can fail. Changed zillions of devices to make them return 0; the only case I've made it return non-0 is hw/intc/s390_flic_kvm.c that already had an error_report/return case. Note: If you add an error exit in your pre_save you must emit an error_report to say why. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20170925112917.21340-2-dgilbert@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* memory: Rename memory_region_init_ram() to memory_region_init_ram_nomigrate()Peter Maydell2017-07-141-1/+1
| | | | | | | | | | Rename memory_region_init_ram() to memory_region_init_ram_nomigrate(). This leaves the way clear for us to provide a memory_region_init_ram() which does handle migration. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1499438577-7674-4-git-send-email-peter.maydell@linaro.org
* hw/block: Request permissionsKevin Wolf2017-02-281-0/+7
| | | | | | | | | | This makes all device emulations with a qdev drive property request permissions on their BlockBackend. The only thing we block at this point is resizing images for some devices that can't support it. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Acked-by: Fam Zheng <famz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
* onenand: Switch to byte-based block accessEric Blake2016-05-121-14/+27
| | | | | | | | | | | | | | Sector-based blk_write() should die; switch to byte-based blk_pwrite() instead. Likewise for blk_read(). This particular device picks its size during onenand_initfn(), and can be at most 0x80000000 bytes; therefore, shifting an 'int sec' request to get back to a byte offset should never overflow 32 bits. But adding assertions to document that point should not hurt. Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* include/qemu/osdep.h: Don't include qapi/error.hMarkus Armbruster2016-03-221-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the Error typedef. Since then, we've moved to include qemu/osdep.h everywhere. Its file comment explains: "To avoid getting into possible circular include dependencies, this file should not include any other QEMU headers, with the exceptions of config-host.h, compiler.h, os-posix.h and os-win32.h, all of which are doing a similar job to this file and are under similar constraints." qapi/error.h doesn't do a similar job, and it doesn't adhere to similar constraints: it includes qapi-types.h. That's in excess of 100KiB of crap most .c files don't actually need. Add the typedef to qemu/typedefs.h, and include that instead of qapi/error.h. Include qapi/error.h in .c files that need it and don't get it now. Include qapi-types.h in qom/object.h for uint16List. Update scripts/clean-includes accordingly. Update it further to match reality: replace config.h by config-target.h, add sysemu/os-posix.h, sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h comment quoted above similarly. This reduces the number of objects depending on qapi/error.h from "all of them" to less than a third. Unfortunately, the number depending on qapi-types.h shrinks only a little. More work is needed for that one. Signed-off-by: Markus Armbruster <armbru@redhat.com> [Fix compilation without the spice devel packages. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* block: Clean up includesPeter Maydell2016-01-201-0/+1
| | | | | | | | | | | Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* Fix bad error handling after memory_region_init_ram()Markus Armbruster2015-09-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Symptom: $ qemu-system-x86_64 -m 10000000 Unexpected error in ram_block_add() at /work/armbru/qemu/exec.c:1456: upstream-qemu: cannot set up guest memory 'pc.ram': Cannot allocate memory Aborted (core dumped) Root cause: commit ef701d7 screwed up handling of out-of-memory conditions. Before the commit, we report the error and exit(1), in one place, ram_block_add(). The commit lifts the error handling up the call chain some, to three places. Fine. Except it uses &error_abort in these places, changing the behavior from exit(1) to abort(), and thus undoing the work of commit 3922825 "exec: Don't abort when we can't allocate guest memory". The three places are: * memory_region_init_ram() Commit 4994653 (right after commit ef701d7) lifted the error handling further, through memory_region_init_ram(), multiplying the incorrect use of &error_abort. Later on, imitation of existing (bad) code may have created more. * memory_region_init_ram_ptr() The &error_abort is still there. * memory_region_init_rom_device() Doesn't need fixing, because commit 33e0eb5 (soon after commit ef701d7) lifted the error handling further, and in the process changed it from &error_abort to passing it up the call chain. Correct, because the callers are realize() methods. Fix the error handling after memory_region_init_ram() with a Coccinelle semantic patch: @r@ expression mr, owner, name, size, err; position p; @@ memory_region_init_ram(mr, owner, name, size, ( - &error_abort + &error_fatal | err@p ) ); @script:python@ p << r.p; @@ print "%s:%s:%s" % (p[0].file, p[0].line, p[0].column) When the last argument is &error_abort, it gets replaced by &error_fatal. This is the fix. If the last argument is anything else, its position is reported. This lets us check the fix is complete. Four positions get reported: * ram_backend_memory_alloc() Error is passed up the call chain, ultimately through user_creatable_complete(). As far as I can tell, it's callers all handle the error sanely. * fsl_imx25_realize(), fsl_imx31_realize(), dp8393x_realize() DeviceClass.realize() methods, errors handled sanely further up the call chain. We're good. Test case again behaves: $ qemu-system-x86_64 -m 10000000 qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory [Exit 1 ] The next commits will repair the rest of commit ef701d7's damage. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1441983105-26376-3-git-send-email-armbru@redhat.com> Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
* onenand: g_malloc() can't fail, bury dead error handlingMarkus Armbruster2015-02-101-7/+1Star
| | | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
* hw: Convert from BlockDriverState to BlockBackend, mostlyMarkus Armbruster2014-10-201-32/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | | Device models should access their block backends only through the block-backend.h API. Convert them, and drop direct includes of inappropriate headers. Just four uses of BlockDriverState are left: * The Xen paravirtual block device backend (xen_disk.c) opens images itself when set up via xenbus, bypassing blockdev.c. I figure it should go through qmp_blockdev_add() instead. * Device model "usb-storage" prompts for keys. No other device model does, and this one probably shouldn't do it, either. * ide_issue_trim_cb() uses bdrv_aio_discard() instead of blk_aio_discard() because it fishes its backend out of a BlockAIOCB, which has only the BlockDriverState. * PC87312State has an unused BlockDriverState[] member. The next two commits take care of the latter two. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* memory: add parameter errp to memory_region_init_ramHu Tao2014-09-091-1/+1
| | | | | | | | | Add parameter errp to memory_region_init_ram and update all call sites to pass in &error_abort. Signed-off-by: Hu Tao <hutao@cn.fujitsu.com> Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* block: Drop superfluous conditionals around g_free()Markus Armbruster2014-06-161-3/+1Star
| | | | | | | Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* savevm: Remove all the unneeded version_minimum_id_old (arm)Juan Quintela2014-05-131-1/+0Star
| | | | | | | | | | | | | | | | | | | | | After commit 767adce2d, they are redundant. This way we don't assign them except when needed. Once there, there were lots of cases where the ".fields" indentation was wrong: .fields = (VMStateField []) { and .fields = (VMStateField []) { Change all the combinations to: .fields = (VMStateField[]){ The biggest problem (apart from aesthetics) was that checkpatch complained when we copy&pasted the code from one place to another. Signed-off-by: Juan Quintela <quintela@redhat.com> [PMM: fixed minor conflict, corrected commit message typos] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* onenand: QOM cast cleanupAndreas Färber2013-07-291-10/+20
| | | | | | | | Introduce a type constant, use QOM casts and rename the parent field and prepare for QOM realize. Reviewed-by: Hu Tao <hutao@cn.fujitsu.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
* hw/block: pass owner to memory_region_init* functionsPaolo Bonzini2013-07-041-4/+6
| | | | Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* memory: add owner argument to initialization functionsPaolo Bonzini2013-07-041-4/+4
| | | | Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* hw: move block devices to hw/block/, configure via default-configs/Paolo Bonzini2013-04-081-0/+842
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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