On 08/05/13 15:03, Paolo Bonzini wrote:
>
> [...]
>
> 2) This is also a simple forwarder function:
>
> .bdrv_create
>
> but there is no BlockDriverState argument so the forwarded-to function
> does not have a bs->file argument either. The forwarded-to function is
> bdrv_create_file.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
On 08/05/13 15:03, Paolo Bonzini wrote:
>
> [...]
>
> 1) BlockDriver is a struct in which these function members are
> interesting:
>
> .bdrv_reopen_prepare
> .bdrv_co_readv
> .bdrv_co_writev
> .bdrv_co_is_allocated
> .bdrv_co_write_zeroes
> .bdrv_co_discard
> .bdrv_getlength
> .bdrv_get_info
> .bdrv_truncate
> .bdrv_is_inserted
> .bdrv_media_changed
> .bdrv_eject
> .bdrv_lock_medium
> .bdrv_ioctl
> .bdrv_aio_ioctl
> .bdrv_has_zero_init
>
> They should be implemented as simple forwarders (see above). There are
> 16 functions listed here, you can easily see how this already accounts
> for 100+ SLOC roughly...
>
> The implementations of bdrv_co_readv and bdrv_co_writev should also call
> BLKDBG_EVENT on bs->file too, before forwarding to bs->file. The events
> to be generated are BLKDBG_READ_AIO and BLKDBG_WRITE_AIO.
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
On 08/05/13 15:03, Paolo Bonzini wrote:
>
>
> ----- Original Message -----
>> From: "Laszlo Ersek" <lersek@redhat.com>
>> To: "Paolo Bonzini" <pbonzini@redhat.com>
>> Sent: Monday, August 5, 2013 2:43:46 PM
>> Subject: Re: [PATCH 1/2] raw: add license header
>>
>> On 08/02/13 00:27, Paolo Bonzini wrote:
>>> On 08/01/2013 10:13 AM, Christoph Hellwig wrote:
>>>> On Wed, Jul 31, 2013 at 08:19:51AM +0200, Paolo Bonzini wrote:
>>>>> Most of the block layer is under the BSD license, thus it is
>>>>> reasonable to license block/raw.c the same way. CCed people should
>>>>> ACK by replying with a Signed-off-by line.
>>>>
>>>> The coded was intended to be GPLv2.
>>>
>>> Laszlo, would you be willing to do clean-room reverse engineering?
>>>
>>> (No rants, please. :))
>>
>> What's the scope exactly?
>
> It's quite small, it's a file full of forwarders like
>
> static void raw_foo(BlockDriverState *bs)
> {
> return bdrv_foo(bs->file);
> }
>
> It's 170 lines of code, all as boring as this. I only picked you
> because I'm quite certain you have never seen the file (and the answer
> confirmed it).
>
> Basically:
>
> 1) BlockDriver is a struct in which these function members are
> interesting:
>
> .bdrv_reopen_prepare
> .bdrv_co_readv
> .bdrv_co_writev
> .bdrv_co_is_allocated
> .bdrv_co_write_zeroes
> .bdrv_co_discard
> .bdrv_getlength
> .bdrv_get_info
> .bdrv_truncate
> .bdrv_is_inserted
> .bdrv_media_changed
> .bdrv_eject
> .bdrv_lock_medium
> .bdrv_ioctl
> .bdrv_aio_ioctl
> .bdrv_has_zero_init
>
> They should be implemented as simple forwarders (see above).
> There are 16 functions listed here, you can easily see how this
> already accounts for 100+ SLOC roughly...
>
> The implementations of bdrv_co_readv and bdrv_co_writev should also
> call BLKDBG_EVENT on bs->file too, before forwarding to bs->file. The
> events to be generated are BLKDBG_READ_AIO and BLKDBG_WRITE_AIO.
>
> 2) This is also a simple forwarder function:
>
> .bdrv_create
>
> but there is no BlockDriverState argument so the forwarded-to function
> does not have a bs->file argument either. The forwarded-to function
> is bdrv_create_file.
>
> 3) These members are special
>
> .format_name is the string "raw"
> .bdrv_open raw_open should set bs->sg to bs->file->sg and return 0
> .bdrv_close raw_close should do nothing
> .bdrv_probe raw_probe should just return 1.
>
> 4) There is another member, .create_options, which is an array of
> QEMUOptionParameter structs, terminated by an all-zero item. The only
> option you need is for the virtual disk size. You will find something
> to copy from in other block drivers, for example block/qcow2.c.
>
> 5) Formats are registered with bdrv_register (takes a BlockDriver*).
> You also need to pass the caller of bdrv_register to block_init.
>
> 6) I'm not sure how to organize the patch series, so I'll leave this to
> your creativity. I guess in this case move/copy detection of git should
> be disabled. I would definitely include this spec in the commit
> message as a proof of clean-room reverse engineering.
>
> 7) Remember a BSD header like the one in block.c.
>
> Paolo
This patch implements the email up to the paragraph ending with "100+ SLOC
roughly". The skeleton is generated from the list there, with a simple
shell loop using "sed" and the raw_foo() template.
The BSD license block is copied (and reflowed) from
"util/qemu-progress.c".
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The expression "1LL << 63" tries to shift the 1 into the sign bit of a
'long long', which provokes a clang sanitizer warning:
runtime error: left shift of 1 by 63 places cannot be represented in type 'long long'
Use "1ULL << 63" as the definition of QCOW_OFLAG_COPIED instead
to avoid this. For consistency, we also update the other QCOW_OFLAG
definitions to use the ULL suffix rather than LL, though only the
shift by 63 is undefined behaviour.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The failing condition is checked immediately before the assertion, so
keeping the assertion is kind of redundant.
Signed-off-by: Kevin Wolf <kwolf@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: Eric Blake <eblake@redhat.com>
* qemu-kvm/uq/master:
kvm-stub: fix compilation
kvm: shorten the parameter list for get_real_device()
kvm: i386: fix LAPIC TSC deadline timer save/restore
kvm-all.c: max_cpus should not exceed KVM vcpu limit
kvm: Simplify kvm_handle_io
kvm: x86: fix setting IA32_FEATURE_CONTROL with nested VMX disabled
kvm: add KVM_IRQFD_FLAG_RESAMPLE support
kvm: migrate vPMU state
target-i386: remove tabs from target-i386/cpu.h
Initialize IA32_FEATURE_CONTROL MSR in reset and migration
Conflicts:
target-i386/cpu.h
target-i386/kvm.c
aliguori: fixup trivial conflicts due to whitespace and added cpu
argument
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
# By Stefan Weil
# Via Stefan Weil
* sweil/mingw:
gtk: Remove unused include statements which are not portable
w32: Add an icon resource
w32: Fix broken out-of-tree builds (missing version.o)
Message-id: 1377607132-21336-1-git-send-email-sw@weilnetz.de
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
This includes pc and pci cleanups, future-proofing of ROM files,
and a virtio bugfix correcting splice on virtio console.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'mst/tags/for_anthony' into stable-1.5
pc,pci,virtio fixes and cleanups
This includes pc and pci cleanups, future-proofing of ROM files,
and a virtio bugfix correcting splice on virtio console.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Mon 26 Aug 2013 01:34:20 AM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found
# By Markus Armbruster (5) and others
# Via Michael S. Tsirkin
* mst/tags/for_anthony:
virtio: virtqueue_get_avail_bytes: fix desc_pa when loop over the indirect descriptor table
pc_piix: Kill pc_init1() memory region args
pc: pc_compat_1_4() now can call pc_compat_1_5()
pc: Create pc_compat_*() functions
pc: Kill pc_init_pci_1_0()
pc: Don't explode QEMUMachineInitArgs into local variables needlessly
pc: Don't prematurely explode QEMUMachineInitArgs
ppc: Don't duplicate QEMUMachineInitArgs in PPCE500Params
ppc: Don't explode QEMUMachineInitArgs into local variables needlessly
sun4: Don't prematurely explode QEMUMachineInitArgs
q35: Add PCIe switch to example q35 configuration
loader: store FW CFG ROM files in RAM
arch_init: align MR size to target page size
pc: cleanup 1.4 compat support
Message-id: 1377535318-30491-1-git-send-email-mst@redhat.com
Indeed, remove it entirely and remove the is_tcg_gen_code check
from GETPC_EXT.
Fixes https://bugs.launchpad.net/qemu/+bug/1218098 wherein a call
to a "normal" helper function performed a sequence of tail calls
all the way into the memory helper functions, leading to a stack
frame in which the memory helper function appeared to be called
directly from tcg.
Signed-off-by: Richard Henderson <rth@twiddle.net>
In get_physical_address() is a qemu_log() call inside an #if 0 block.
When enabled the following build error is hit:
target-mips/helper.c In function ‘get_physical_address’:
target-mips/helper.c:220:13: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 5 has type ‘hwaddr’ [-Werror=format]
Fix the *physical (hwaddr) formatting by using "%"HWADDR_PRIx instead of
TARGET_FMT_lx.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Non-KVM targets fail compilation on the uq/master branch.
Fix the prototype of kvm_irqchip_add_irqfd_notifier to match
the one in kvm-all.c.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
These include files don't exist for MinGW and are not needed for Linux
(and hopefully for other hosts as well), so remove them.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Commit 0b516ef0df added version.o to all
executables, but broke out-of-tree builds: for those builds the pattern
rule %.o: %.rc from rules.mak does not match, so version.o was no longer
built.
Adding explicit build rules fixes this.
Reported-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Tested-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Discontinue the jump-around-jump-to-jump scheme, trading it for a single
immediate move instruction. The two extra jumps always consume 7 bytes,
whereas the immediate move is either 5 or 7 bytes depending on where the
code_gen_buffer gets located.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Avoid a loop in the tlb_fill path; the fill will either succeed or
generate an exception.
Inline the slow_ld/st function; it was a complete copy of the main
helper except for the actual cross-page unaligned code, and the
compiler was inlining it anyway.
Add unlikely markers optimizing for the most common case of simple
tlb miss.
Make sure the compiler can optimize away the unaligned paths for a
1 byte access.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Allow the code that tcg generates to be less obtuse, passing in
the return address directly instead of computing it in the helper.
Maintain the old entrance point unchanged as an alternate entry point.
Delete the helper_st*_cmmu prototypes; the implementations did not exist.
Signed-off-by: Richard Henderson <rth@twiddle.net>
No point in splitting the write into 32-bit pieces.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Aliasing was forcing s->code_ptr to be re-read after the store.
Keep the pointer in a local variable to help the compiler.
Signed-off-by: Richard Henderson <rth@twiddle.net>
# By Alex Bligh (32) and others
# Via Stefan Hajnoczi
* stefanha/block: (42 commits)
win32-aio: drop win32_aio_flush_cb()
aio-win32: replace incorrect AioHandler->opaque usage with ->e
aio / timers: remove dummy_io_handler_flush from tests/test-aio.c
aio / timers: Remove legacy interface
aio / timers: Switch entire codebase to the new timer API
aio / timers: Add scripts/switch-timer-api
aio / timers: Add test harness for AioContext timers
aio / timers: convert block_job_sleep_ns and co_sleep_ns to new API
aio / timers: Convert rtc_clock to be a QEMUClockType
aio / timers: Remove main_loop_timerlist
aio / timers: Rearrange timer.h & make legacy functions call non-legacy
aio / timers: Add qemu_clock_get_ms and qemu_clock_get_ms
aio / timers: Remove legacy qemu_clock_deadline & qemu_timerlist_deadline
aio / timers: Remove alarm timers
aio / timers: Add documentation and new format calls
aio / timers: Use all timerlists in icount warp calculations
aio / timers: Introduce new API timer_new and friends
aio / timers: On timer modification, qemu_notify or aio_notify
aio / timers: Convert mainloop to use timeout
aio / timers: Convert aio_poll to use AioContext timers' deadline
...
Message-id: 1377202298-22896-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
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Merge remote-tracking branch 'afaerber/tags/0.15-maintainer-for-anthony' into staging
MAINTAINERS update for stable-0.15
# gpg: Signature made Thu 22 Aug 2013 10:59:31 AM CDT using RSA key ID 3E7E013F
# gpg: Can't check signature: public key not found
# By Andreas Färber
# Via Andreas Färber
* afaerber/tags/0.15-maintainer-for-anthony:
MAINTAINERS: Take over 0.15 maintenance
virtqueue_get_avail_bytes: when found a indirect desc, we need loop over it.
/* loop over the indirect descriptor table */
indirect = 1;
max = vring_desc_len(desc_pa, i) / sizeof(VRingDesc);
num_bufs = i = 0;
desc_pa = vring_desc_addr(desc_pa, i);
But, It init i to 0, then use i to update desc_pa. so we will always get:
desc_pa = vring_desc_addr(desc_pa, 0);
the last two line should swap.
Cc: qemu-stable@nongnu.org
Signed-off-by: Yin Yin <yin.yin@cs2c.com.cn>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This gives the dumped blob its correct address during disassembly,
which makes pc-relative insns much easier to interpret.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
The script massages the output produced for architectures that are
not supported internally by qemu though an external objdump program
for disassembly.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
The OBJD-[HT] tags will be used by a script to run the hex blob
through objdump --disassemble.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
get_real_device() has 5 parameters with the last 4 is contained in the first
structure.
This patch removes the last 4 parameters and directly use them from the first
parameter.
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The io_flush argument to qemu_aio_set_event_notifier() has been removed
since the block layer learnt to drain requests by itself. Fix the
Windows build for win32-aio.o by updating the
qemu_aio_set_event_notifier() call and dropping win32_aio_flush_cb().
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The AioHandler->opaque field does not exist in aio-win32.c. The code
that uses it was incorrectly copied from aio-posix.c. For Windows we
can use AioHandler->e to match against AioContext->notifier.
This patch fixes the Windows build for aio-win32.o.
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Remove dummy_io_handler_flush from tests/test-aio.c as it does
nothing now.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Remove the legacy interface from include/qemu/timers.h.
Ensure struct QEMUClock is not exposed at all.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This is an autogenerated patch using scripts/switch-timer-api.
Switch the entire code base to using the new timer API.
Note this patch may introduce some line length issues.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add scripts/switch-timer-api to programatically rewrite source
files to use the new timer system.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add a test harness for AioContext timers. The g_source equivalent is
unsatisfactory as it suffers from false wakeups.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Convert block_job_sleep_ns and co_sleep_ns to use the new timer
API.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Convert rtc_clock to be a QEMUClockType
Move rtc_clock users to use the new API
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Now we have timerlistgroups implemented and main_loop_tlg, we
no longer need the concept of a default timer list associated
with each clock. Remove it and simplify initialisation of
clocks and timer lists.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Rearrange timer.h so it is in order by function type.
Make legacy functions call non-legacy functions rather than vice-versa.
Convert cpus.c to use new API.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add utility functions qemu_clock_get_ms and qemu_clock_get_us
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Remove qemu_clock_deadline and qemu_timerlist_deadline now we are using
the ns functions throughout.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Remove alarm timers from qemu-timers.c now we use g_poll / ppoll
instead.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add documentation for existing qemu timer calls. Add new format
calls of the format timer_XXX rather than qemu_XXX_timer
for consistency.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Notify all timerlists derived from vm_clock in icount warp
calculations.
When calculating timer delay based on vm_clock deadline, use
all timerlists.
For compatibility, maintain an apparent bug where when using
icount, if no vm_clock timer was set, qemu_clock_deadline
would return INT32_MAX and always set an icount clock expiry
about 2 seconds ahead.
NB: thread safety - when different timerlists sit on different
threads, this will need some locking.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Introduce new API for creating timers - timer_new and
_ns, _ms, _us derivatives.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
On qemu_mod_timer_ns, ensure qemu_notify or aio_notify is called to
end the appropriate poll(), irrespective of use_icount value.
On qemu_clock_enable, ensure qemu_notify or aio_notify is called for
all QEMUTimerLists attached to the QEMUClock.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
