In 4146b46c42e0989cb5842e04d88ab6ccb1713a48 (block: Produce zeros when
protocols reading beyond end of file), we break qemu-iotests ./check
-qcow2 022. This happens because qcow2 temporarily sets ->growable = 1
for vmstate accesses (which are stored beyond the end of regular image
data).
We introduce the bs->zero_beyond_eof to allow qcow2_load_vmstate() to
disable ->zero_beyond_eof temporarily in addition to enable ->growable.
[Since the broken patch "block: Produce zeros when protocols reading
beyond end of file" has not been merged yet, I have applied this fix
*first* and will then apply the next patch to keep the tree bisectable.
-- Stefan]
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
By the time that qemu 1.7 will be released, enough time will have passed
since qemu 1.1, which is the first version to understand version 3
images, that changing the default shouldn't hurt many people any more
and the benefits of using the new format outweigh the pain.
qemu-iotests already runs with compat=1.1 by default.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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Merge remote-tracking branch 'pmaydell/tags/pull-target-arm-20130820' into staging
target-arm queue
# gpg: Signature made Tue 20 Aug 2013 08:56:28 AM CDT using RSA key ID 14360CDE
# gpg: Can't check signature: public key not found
# By Peter Maydell (20) and Peter Chubb (1)
# Via Peter Maydell
* pmaydell/tags/pull-target-arm-20130820: (21 commits)
hw/timer/imx_epit: Simplify and fix imx_epit implementation
default-configs: Fix A9MP and A15MP config names
hw/cpu/a15mpcore: Wire generic timer outputs to GIC inputs
target-arm: Implement the generic timer
target-arm: Support coprocessor registers which do I/O
target-arm: Allow raw_read() and raw_write() to handle 64 bit regs
hw/arm/pic_cpu: Remove the now-unneeded arm_pic_init_cpu()
hw/arm/xilinx_zynq: Don't use arm_pic_init_cpu()
hw/arm/vexpress: Don't use arm_pic_init_cpu()
hw/arm/versatilepb: Don't use arm_pic_init_cpu()
hw/arm/strongarm: Don't use arm_pic_init_cpu()
hw/arm/realview: Don't use arm_pic_init_cpu()
hw/arm/omap*: Don't use arm_pic_init_cpu()
hw/arm/musicpal: Don't use arm_pic_init_cpu()
hw/arm/kzm: Don't use arm_pic_init_cpu()
hw/arm/integratorcp: Don't use arm_pic_init_cpu()
hw/arm/highbank: Don't use arm_pic_init_cpu()
hw/arm/exynos4210: Don't use arm_pic_init_cpu()
hw/arm/armv7m: Don't use arm_pic_init_cpu()
target-arm: Make IRQ and FIQ gpio lines on the CPU object
...
Message-id: 1377007680-4934-1-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
# By Stefan Hajnoczi
# Via Stefan Hajnoczi
* stefanha/block-next:
aio: drop io_flush argument
tests: drop event_active_cb()
thread-pool: drop thread_pool_active()
dataplane/virtio-blk: drop flush_true() and flush_io()
block/ssh: drop return_true()
block/sheepdog: drop have_co_req() and aio_flush_request()
block/rbd: drop qemu_rbd_aio_flush_cb()
block/nbd: drop nbd_have_request()
block/linux-aio: drop qemu_laio_completion_cb()
block/iscsi: drop iscsi_process_flush()
block/gluster: drop qemu_gluster_aio_flush_cb()
block/curl: drop curl_aio_flush()
aio: stop using .io_flush()
tests: adjust test-thread-pool to new aio_poll() semantics
tests: adjust test-aio to new aio_poll() semantics
dataplane/virtio-blk: check exit conditions before aio_poll()
block: stop relying on io_flush() in bdrv_drain_all()
block: ensure bdrv_drain_all() works during bdrv_delete()
Message-id: 1376921877-9576-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
# By Richard Henderson
# Via Richard Henderson
* rth/axp-next:
target-alpha: Implement the typhoon iommu
target-alpha: Consider the superpage when threading and ending TBs
target-alpha: Use goto_tb in call_pal
target-alpha: Implement call_pal without an exception
Message-id: 1376720412-2165-1-git-send-email-rth@twiddle.net
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
When imx_epit.c was last refactored, a common usecase (comparison
register zero) broke. This patch fixes that, and simplifies the code
yet more. It also fixes a major thinko in the reset path --- the
wrong bits in the control register were being cleared.
Signed-off-by: Peter Chubb <peter.chubb@nicta.com.au>
Reviewed-by: Jean-Christophe DUBOIS <jcd@tribudubois.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
When individual CONFIG_ switches for the A9MPcore and A15MPcore
devices were created, they were inadvertently given incorrect names
(CONFIG_ARM9MPCORE and CONFIG_ARM15MPCORE). These CPUs are
"Cortex-A9MP" and "Cortex-A15MP", and in particular the ARM9 is
a different (rather older) CPU than the Cortex-A9. Rename the
CONFIG_ switches to bring them into line with the source file
names and CPU names.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1376056215-26391-1-git-send-email-peter.maydell@linaro.org
Now our A15 CPU implements the generic timers, we can wire them
up to the appropriate inputs on the GIC.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-id: 1376065080-26661-5-git-send-email-peter.maydell@linaro.org
The ARMv7 architecture specifies a 'generic timer' which is implemented
via cp15 registers. Newer kernels will prefer to use this rather than
a devboard-level timer. Implement the generic timer for TCG; for KVM
we will already use the hardware's virtualized timer for this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-id: 1376065080-26661-4-git-send-email-peter.maydell@linaro.org
Add an ARM_CP_IO flag which an ARMCPRegInfo definition can use to
indicate that the register's implementation does I/O and thus
its accesses need to be surrounded by gen_io_start()/gen_io_end()
in order for icount to work. Most notably, cp registers which
implement clocks or timers need this.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Message-id: 1376065080-26661-3-git-send-email-peter.maydell@linaro.org
Extend the raw_read() and raw_write() helper accessors so that
they can be used for 64 bit registers as well as 32 bit registers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Message-id: 1376065080-26661-2-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-14-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-13-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-12-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-11-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-10-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-9-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-8-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-7-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-6-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-5-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-4-git-send-email-peter.maydell@linaro.org
Drop the now-deprecated arm_pic_init_cpu() in favour of directly
getting the IRQ line from the ARMCPU object.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-3-git-send-email-peter.maydell@linaro.org
Now that ARMCPU is a subclass of DeviceState, we can make the
CPU's inbound IRQ and FIQ lines be simply gpio lines, which
means we can remove the odd arm_pic shim.
We retain the arm_pic_init_cpu() function as a backwards
compatibility shim layer so we can convert the board models
to get the IRQ and FIQ lines directly from the ARMCPU
object one at a time.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1375977856-25046-2-git-send-email-peter.maydell@linaro.org
The 'int' loglevel for recording interrupts and exceptions
requires support in the target-specific code. Implement
it for ARM. This improves debug logging in some situations
that were otherwise pretty opaque, such as when we fault
trying to execute at an exception vector address, which
would otherwise cause an infinite loop of taking exceptions
without any indication in the debug log of what was going on.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1375700771-21665-1-git-send-email-peter.maydell@linaro.org
The .io_flush() handler no longer exists and has no users. Drop the
io_flush argument to aio_set_fd_handler() and related functions.
The AioFlushEventNotifierHandler and AioFlushHandler typedefs are no
longer used and are dropped too.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Drop the io_flush argument to aio_set_event_notifier().
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
.io_flush() is no longer called so drop thread_pool_active(). The block
layer is the only thread-pool.c user and it already tracks in-flight
requests, therefore we do not need thread_pool_active().
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
.io_flush() is no longer called so drop qemu_rbd_aio_flush_cb().
qemu_aio_count is unused now so drop it too.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
.io_flush() is no longer called so drop nbd_have_request(). We cannot
drop in_flight since it is still used by other block/nbd.c code.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
.io_flush() is no longer called so drop qemu_laio_completion_cb(). It
turns out that count is now unused so drop that too.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Since .io_flush() is no longer called we do not need
qemu_gluster_aio_flush_cb() anymore. It turns out that qemu_aio_count
is unused now and can be dropped.
Thanks to Bharata B Rao <bharata@linux.vnet.ibm.com> for catching a
build failure with CONFIG_GLUSTERFS_DISCARD, which has been fixed.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
.io_flush() is no longer called so drop curl_aio_flush(). The acb[]
array that the function checks is still used in other parts of
block/curl.c. Therefore we cannot remove acb[], it is needed.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Now that aio_poll() users check their termination condition themselves,
it is no longer necessary to call .io_flush() handlers.
The behavior of aio_poll() changes as follows:
1. .io_flush() is no longer invoked and file descriptors are *always*
monitored. Previously returning 0 from .io_flush() would skip this file
descriptor.
Due to this change it is essential to check that requests are pending
before calling qemu_aio_wait(). Failure to do so means we block, for
example, waiting for an idle iSCSI socket to become readable when there
are no requests. Currently all qemu_aio_wait()/aio_poll() callers check
before calling.
2. aio_poll() now returns true if progress was made (BH or fd handlers
executed) and false otherwise. Previously it would return true whenever
'busy', which means that .io_flush() returned true. The 'busy' concept
no longer exists so just progress is returned.
Due to this change we need to update tests/test-aio.c which asserts
aio_poll() return values. Note that QEMU doesn't actually rely on these
return values so only tests/test-aio.c cares.
Note that ctx->notifier, the EventNotifier fd used for aio_notify(), is
now handled as a special case. This is a little ugly but maintains
aio_poll() semantics, i.e. aio_notify() does not count as 'progress' and
aio_poll() avoids blocking when the user has not set any fd handlers yet.
Patches after this remove .io_flush() handler code until we can finally
drop the io_flush arguments to aio_set_fd_handler() and friends.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
aio_poll(ctx, true) will soon block when fd handlers have been set.
Previously aio_poll() would return early if all .io_flush() returned
false. This means we need to check the equivalent of the .io_flush()
condition *before* calling aio_poll(ctx, true) to avoid deadlock.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
aio_poll(ctx, true) will soon block if any fd handlers have been set.
Previously it would only block when .io_flush() returned true.
This means that callers must check their wait condition *before*
aio_poll() to avoid deadlock.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Check exit conditions before entering blocking aio_poll(). This is
mainly for consistency since it's unlikely that we are stopping in the
first event loop iteration.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
If a block driver has no file descriptors to monitor but there are still
active requests, it can return 1 from .io_flush(). This is used to spin
during synchronous I/O.
Stop relying on .io_flush() and instead check
QLIST_EMPTY(&bs->tracked_requests) to decide whether there are active
requests.
This is the first step in removing .io_flush() so that event loops no
longer need to have the concept of synchronous I/O. Eventually we may
be able to kill synchronous I/O completely by running everything in a
coroutine, but that is future work.
Note this patch moves bs->throttled_reqs initialization to bdrv_new() so
that bdrv_requests_pending(bs) can safely access it. In practice bs is
g_malloc0() so the memory is already zeroed but it's safer to initialize
the queue properly.
We also need to fix up block/stream.c:close_unused_images() to prevent
traversing a dangling pointer while it rearranges the backing file
chain. This is necessary since the new bdrv_drain_all() traverses the
backing file chain.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
In bdrv_delete() make sure to call bdrv_make_anon() *after* bdrv_close()
so that the device is still seen by bdrv_drain_all() when iterating
bdrv_states.
Cc: qemu-stable@nongnu.org
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This allows significantly more threading, and occasionally larger TBs,
when processing code for the kernel and PALcode.
Signed-off-by: Richard Henderson <rth@twiddle.net>
With appropriate flushing when the PALBR changes, the target of
a CALL_PAL is so predictable we can chain to it.
Signed-off-by: Richard Henderson <rth@twiddle.net>
The destination of the call_pal, and the cpu state, is very predictable;
there's no need for exiting the cpu loop.
Signed-off-by: Richard Henderson <rth@twiddle.net>
