New action is like clean action: do the whole thing in .prepare and
undo in .abort. This behavior for bitmap-changing actions is needed
because backup job actions use bitmap in .prepare.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Rename block-dirty-bitmap-clear transaction handlers to reuse them for
x-block-dirty-bitmap-merge transaction in the following patch.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Add backup parameter to bdrv_merge_dirty_bitmap() to be used then with
bdrv_restore_dirty_bitmap() if it needed to restore the bitmap after
merge operation.
This is needed to implement bitmap merge transaction action in further
commit.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Use more generic names to reuse the function for bitmap merge in the
following commit.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Move checks from qmp_x_block_dirty_bitmap_merge() to
bdrv_merge_dirty_bitmap(), to share them with dirty bitmap merge
transaction action in future commit.
Note: for now, only qmp_x_block_dirty_bitmap_merge() calls
bdrv_merge_dirty_bitmap().
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
It is only an oversight that we don't allow incremental backup with
blockdev-backup. Add the bitmap argument which enables this.
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20180830211605.13683-2-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>
I spent way too much time trying to figure out why the emulated NVDIMM
was missing under Linux. In an effort to help others who might be looking
for these kinds of things in the future, include a hint.
Signed-off-by: Kees Cook <keescook@chromium.org>
Message-id: 20181018201351.GA25286@beast
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
According to qdev-properties.h, properties of pointer type should
be avoided, it seems a link type property is a good substitution.
Cc: Jan Kiszka <jan.kiszka@web.de>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181022074050.19638-3-maozhongyi@cmss.chinamobile.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
See qemu_spice_add_display_interface(), the console index is also used
as channel id. So put that into the qxl->id field too.
In typical use cases (one primary qxl-vga device, optionally one or more
secondary qxl devices, no non-qxl display devices) this doesn't change
anything.
With this in place the qxl->id can not be used any more to figure
whenever a given device is primary (with vga compat mode) or secondary.
So add a bool to track this.
Cc: spice-devel@lists.freedesktop.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20181012114540.27829-1-kraxel@redhat.com
One fix for mingw build and some improvements in VM based testing, many thanks
to Paolo and Phil.
-----BEGIN PGP SIGNATURE-----
iQFEBAABCAAuFiEEUAN8t5cGD3bwIa1WyjViTGqRccYFAlvTIXEQHGZhbXpAcmVk
aGF0LmNvbQAKCRDKNWJMapFxxlRqB/99FX5texTlvPy2yH8jC6eXWt1XzcqVc9Ei
TPHJ3LLR7EqjTBD/NCgvRzed4D0U2uRm8rXssujJPUnqt9hmlpNPzIEqLeV650hB
QBWWC8rrxzPMGKbQzBE0b/bbAaXW4KFsBXicmrTJz6MCN12S4yGwMJg3B7yAeXtp
2cVjhmoXiynx7qsWjKl8+hvSmCSMYvsfNygHGbFaLdr/CB8+ug/5fRg2yrhWz68U
emcjljgHRiZpKy8Kn0F0lKTPqKCYi0EVxoDk424c2Ag+oGZsxvhJMolPooOWVXCX
8bfmzyRR2aPi9m8bfp42+yqYYopD/ncr2zF65+6OYtTA2GfxiywG
=wIx1
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/famz/tags/testing-pull-request' into staging
Testing patches
One fix for mingw build and some improvements in VM based testing, many thanks
to Paolo and Phil.
# gpg: Signature made Fri 26 Oct 2018 15:15:13 BST
# gpg: using RSA key CA35624C6A9171C6
# gpg: Good signature from "Fam Zheng <famz@redhat.com>"
# Primary key fingerprint: 5003 7CB7 9706 0F76 F021 AD56 CA35 624C 6A91 71C6
* remotes/famz/tags/testing-pull-request:
tests/vm: Do not abuse parallelism when HOST != TARGET architecture
tests/vm: Do not use -enable-kvm if HOST != TARGET architecture
tests/vm: Let kvm_available() work in cross environments
tests/vm: Add a BaseVM::arch property
tests/vm: Display remaining seconds to wait for a VM to start
tests/vm: Do not use the -smp option with a single cpu
tests/vm: Do not abuse parallelism when KVM is not available
tests/vm: Extract the kvm_available() handy function
tests: docker: update test-mingw for GTK+ 2.0 removal
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJb0iQKAAoJENSXKoln91plUngH/icGvr5sa6JbT/4bDP20Wv7y
gwJ8Ax6kKDU4Z/JbBt+2diXVRrPXCF6xt/dvcaWCnxKyjIZN0i2azHv75jtMEA5t
+khdqqREzTZ8RiEI+u0r+OkSNJ3837O+ahQFdRxjqSDIScC8mcwW8h1md9ThjzbQ
yBhRvNo8QkXGGx9MCWZ7kUGkPnJDQnL0jGiFj0xhtyDSGXfnnOpUgpQKRWu5cQzl
Q7JKFPQgt676kd6UyG7f+xYw/a6uERmMBWp30CfN6bP4bPcdFHdUlgIM60VRAfhA
qYA4led5sWcuqmA96PoZIOc+05/8Q8NkgP+nYbXeMkW8/9QOCPa/30p7QayOpZA=
=F4up
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/amarkovic/tags/mips-queue-oct-2018-part-3' into staging
MIPS queue for October 2018 - part 3
# gpg: Signature made Thu 25 Oct 2018 21:14:02 BST
# gpg: using RSA key D4972A8967F75A65
# gpg: Good signature from "Aleksandar Markovic <amarkovic@wavecomp.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: 8526 FBF1 5DA3 811F 4A01 DD75 D497 2A89 67F7 5A65
* remotes/amarkovic/tags/mips-queue-oct-2018-part-3:
target/mips: Add disassembler support for nanoMIPS
target/mips: Implement emulation of nanoMIPS EVA instructions
target/mips: Add nanoMIPS CRC32 instruction pool
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The 'arch' property gives a hint on which architecture the guest image runs.
This can be use to select the correct QEMU binary path.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20181013004034.6968-6-f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Fam Zheng <famz@redhat.com>
--with-gtkabi does not exist anymore; remove it from the configure invocation.
Fixes: 89d85cde75
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1539886203-33670-1-git-send-email-pbonzini@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Add disassembler support for nanoMIPS.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Matthew Fortune <matthew.fortune@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Implement emulation of nanoMIPS EVA instructions. They are all
part of P.LS.E0 instruction pool, or one of its subpools.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Dimitrije Nikolic <dnikolic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
This pull request contains a handful of patches that have been floating
around various trees for a while but haven't made it upstream. These
patches all appear quite safe. They're all somewhat independent from
each other:
* One refactors our IRQ management function to allow multiple interrupts
to be raised an once. This patch has no functional difference.
* Cleaning up the op_helper/cpu_helper split. This patch has no
functional difference.
* Updates to various constants to keep them in sync with the latest ISA
specification and to remove some non-standard bits that snuck in.
* A fix for a memory leak in the PLIC driver.
* A fix to our device tree handling to avoid provinging a NULL string.
I've given this my standard test: building the port, booting a Fedora
root filesytem on the latest Linux tag, and then shutting down that
image. Essentially I'm just following the QEMU RISC-V wiki page's
instructions. Everything looks fine here.
We have a lot more outstanding patches so I'll definately be submitting
another PR for the soft freeze.
-----BEGIN PGP SIGNATURE-----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=+IgM
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/riscv/tags/riscv-for-master-3.1-sf0' into staging
First RISC-V Patch Set for the 3.1 Soft Freeze
This pull request contains a handful of patches that have been floating
around various trees for a while but haven't made it upstream. These
patches all appear quite safe. They're all somewhat independent from
each other:
* One refactors our IRQ management function to allow multiple interrupts
to be raised an once. This patch has no functional difference.
* Cleaning up the op_helper/cpu_helper split. This patch has no
functional difference.
* Updates to various constants to keep them in sync with the latest ISA
specification and to remove some non-standard bits that snuck in.
* A fix for a memory leak in the PLIC driver.
* A fix to our device tree handling to avoid provinging a NULL string.
I've given this my standard test: building the port, booting a Fedora
root filesytem on the latest Linux tag, and then shutting down that
image. Essentially I'm just following the QEMU RISC-V wiki page's
instructions. Everything looks fine here.
We have a lot more outstanding patches so I'll definately be submitting
another PR for the soft freeze.
# gpg: Signature made Wed 17 Oct 2018 21:17:52 BST
# gpg: using RSA key EF4CA1502CCBAB41
# gpg: Good signature from "Palmer Dabbelt <palmer@dabbelt.com>"
# gpg: aka "Palmer Dabbelt <palmer@sifive.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: 00CE 76D1 8349 60DF CE88 6DF8 EF4C A150 2CCB AB41
* remotes/riscv/tags/riscv-for-master-3.1-sf0:
RISC-V: Don't add NULL bootargs to device-tree
RISC-V: Add missing free for plic_hart_config
RISC-V: Update CSR and interrupt definitions
RISC-V: Move non-ops from op_helper to cpu_helper
RISC-V: Allow setting and clearing multiple irqs
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The XTS cipher mode performance is approximately doubled and test
coverage is improved.
-----BEGIN PGP SIGNATURE-----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=K2kp
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/berrange/tags/qcrypto-next-pull-request' into staging
Improve performance of XTS cipher mode impl
The XTS cipher mode performance is approximately doubled and test
coverage is improved.
# gpg: Signature made Wed 24 Oct 2018 19:05:08 BST
# gpg: using RSA key BE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>"
# gpg: aka "Daniel P. Berrange <berrange@redhat.com>"
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E 8E3F BE86 EBB4 1510 4FDF
* remotes/berrange/tags/qcrypto-next-pull-request:
crypto: add testing for unaligned buffers with XTS cipher mode
crypto: refactor XTS cipher mode test suite
crypto: annotate xts_tweak_encdec as inlineable
crypto: convert xts_mult_x to use xts_uint128 type
crypto: convert xts_tweak_encdec to use xts_uint128 type
crypto: introduce a xts_uint128 data type
crypto: remove code duplication in tweak encrypt/decrypt
crypto: expand algorithm coverage for cipher benchmark
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Validate that the XTS cipher mode will correctly operate with plain
text, cipher text and IV buffers that are not 64-bit aligned.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The current XTS test overloads two different tests in a single function
making the code a little hard to follow. Split it into distinct test
cases.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Encouraging the compiler to inline xts_tweak_encdec increases the
performance for xts-aes-128 when built with gcrypt:
Encrypt: 545 MB/s -> 580 MB/s
Decrypt: 568 MB/s -> 602 MB/s
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Using 64-bit arithmetic increases the performance for xts-aes-128
when built with gcrypt:
Encrypt: 355 MB/s -> 545 MB/s
Decrypt: 362 MB/s -> 568 MB/s
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Using 64-bit arithmetic increases the performance for xts-aes-128
when built with gcrypt:
Encrypt: 272 MB/s -> 355 MB/s
Decrypt: 275 MB/s -> 362 MB/s
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The new type is designed to allow use of 64-bit arithmetic instead
of operating 1-byte at a time. The following patches will use this to
improve performance.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The tweak encrypt/decrypt functions are identical except for the
comments, so can be merged. Profiling data shows that the compiler is
in fact already merging the two merges in the object files.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Add testing coverage for AES with XTS, ECB and CTR modes
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJb0HIuAAoJENSXKoln91plGcUH/3Lje5KF8kkShQ5dIrH9e8Xz
bvK6lXOLNnndEyrWqJNLaJs7eJKEV2N+E2sBmdIjKnWXVHW6gOW3QBMuVGPTT4rg
C6cntrh2HpnxibgJqrR+3RmjQHAI1Ktixhker9LWimF3ZZhcy4H6mFHwW9z7eBK4
+n/pbnk8fq4FlGHJ2teHhctVIma6slmd8lkMa9vdwVQwpAyzpP82XjrsoTeeYhmG
uuTvX3TFnXKGa9mYGxybpwKd4i+397l9fTQ4egx1KlZMR8OHuQItCBDOFdiQpHOg
yljCeG3jHEhNzVf+xW7JU692Lz097otWDbzWDJibYGJkdkhKfyHJ9PvCYaPiK6M=
=Sg8J
-----END PGP SIGNATURE-----
Merge remote-tracking branch 'remotes/amarkovic/tags/mips-queue-oct-2018-part-2-v2' into staging
MIPS queue for October 2018 - part 2 - v2
# gpg: Signature made Wed 24 Oct 2018 14:22:54 BST
# gpg: using RSA key D4972A8967F75A65
# gpg: Good signature from "Aleksandar Markovic <amarkovic@wavecomp.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: 8526 FBF1 5DA3 811F 4A01 DD75 D497 2A89 67F7 5A65
* remotes/amarkovic/tags/mips-queue-oct-2018-part-2-v2: (33 commits)
target/mips: Fix decoding of ALIGN and DALIGN instructions
target/mips: Fix the title of translate.c
linux-user/mips: Recognize the R5900 CPU model
target/mips: Define the R5900 CPU
tests/tcg/mips: Add tests for R5900 DIVU1
tests/tcg/mips: Add tests for R5900 DIV1
tests/tcg/mips: Add tests for R5900 MTLO1 and MTHI1
tests/tcg/mips: Add tests for R5900 MFLO1 and MFHI1
tests/tcg/mips: Add tests for R5900 three-operand MULTU1
tests/tcg/mips: Add tests for R5900 three-operand MULT1
tests/tcg/mips: Add tests for R5900 three-operand MULTU
tests/tcg/mips: Add tests for R5900 three-operand MULT
target/mips: Make R5900 DMULT[U], DDIV[U], LL[D] and SC[D] user only
target/mips: Support R5900 MOVN, MOVZ and PREF instructions from MIPS IV
target/mips: Support R5900 DIV1 and DIVU1 instructions
target/mips: Support R5900 MFLO1, MTLO1, MFHI1 and MTHI1 instructions
target/mips: Support R5900 three-operand MULT1 and MULTU1 instructions
target/mips: Support R5900 three-operand MULT and MULTU instructions
target/mips: Add a placeholder for R5900 MMI3 instruction subclass
target/mips: Add a placeholder for R5900 MMI2 instruction subclass
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Opcode for ALIGN and DALIGN must be in fact ranges of opcodes, to
allow paremeter 'bp' to occupy two and three bits, respectively.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Replace MIPS32 with MIPS, since the file covers all generations
of MIPS architectures.
Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
This kind of ELF for the R5900 relies on an IEEE 754-1985 compliant FPU.
The R5900 FPU hardware is noncompliant and it is therefore emulated in
software by the Linux kernel. QEMU emulates a compliant FPU accordingly.
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
The primary purpose of this change is to support programs compiled by
GCC for the R5900 target and thereby run R5900 Linux distributions, for
example Gentoo.
GCC in version 7.3, by itself, by inspection of the GCC source code
and inspection of the generated machine code, for the R5900 target,
only emits two instructions that are specific to the R5900: the three-
operand MULT and MULTU. GCC and libc also emit certain MIPS III
instructions that are not part of the R5900 ISA. They are normally
trapped and emulated by the Linux kernel, and therefore need to be
treated accordingly by QEMU.
A program compiled by GCC is taken to mean source code compiled by GCC
under the restrictions above. One can, with the apparent limitations,
with a bit of effort obtain a fully functioning operating system such
as R5900 Gentoo. Strictly speaking, programs need not be compiled by
GCC to make use of this change.
Instructions and other facilities of the R5900 not implemented by this
change are intended to signal provisional exceptions. One such example
is the FPU that is not compliant with IEEE 754-1985 in system mode. It
is therefore provisionally disabled. In user space the FPU is trapped
and emulated by IEEE 754-1985 compliant software in the kernel, and
this is handled accordingly by QEMU. Another example is the 93
multimedia instructions specific to the R5900 that generate provisional
reserved instruction exception signals.
One of the benefits of running a Linux distribution under QEMU is that
programs can be compiled with a native compiler, where the host and
target are the same, as opposed to a cross-compiler, where they are
not the same. This is especially important in cases where the target
hardware does not have the resources to run a native compiler.
Problems with cross-compilation are often related to host and target
differences in integer sizes, pointer sizes, endianness, machine code,
ABI, etc. Sometimes cross-compilation is not even supported by the
build script for a given package. One effective way to avoid those
problems is to replace the cross-compiler with a native compiler. This
change of compilation methods does not resolve the inherent problems
with cross-compilation.
The native compiler naturally replaces the cross-compiler, because one
typically uses one or the other, and preferably the native compiler
when the circumstances admit this. The native compiler is also a good
test case for the R5900 QEMU user mode. Additionally, Gentoo is well-
known for compiling and installing its packages from sources.
This change has been tested with Gentoo compiled for R5900, including
native compilation of several packages under QEMU.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add a test for DIVU1.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Add a test for DIV1.
Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>