Cc: Michael Walle <michael@walle.cc>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We do not support probing, but we do not need it yet either.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Remove dumping of cpu state. Remove logging of PC, as that
value is garbage until cpu_restore_state.
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This hook will replace the (user-only mode specific) handle_mmu_fault
hook, and the (system mode specific) tlb_fill function.
The handle_mmu_fault hook was written as if there was a valid
way to recover from an mmu fault, and had 3 possible return states.
In reality, the only valid action is to raise an exception,
return to the main loop, and deliver the SIGSEGV to the guest.
Note that all of the current implementations of handle_mmu_fault
for guests which support linux-user do in fact only ever return 1,
which is the signal to return to the main loop.
Using the hook for system mode requires that all targets be converted,
so for now the hook is (optionally) used only from user-only mode.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
When linux-user/exit was introduced we failed to move the gprof
include at the same time. The CI didn't notice because it only builds
system emulation. Fix it for those that still find gprof useful.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Message-Id: <20190502092728.32727-1-alex.bennee@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The guest tends to get confused when it receives signals it doesn't
know about. Given the gprof magic has also set up it's own handler we
would do well to avoid stomping on it as well.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20190502145846.26226-1-alex.bennee@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Some PT_LOAD segments may be completely zeroed out and their p_filesize
is zero, in that case the loader should just allocate a page that's at
least p_memsz bytes large (plus eventual alignment padding).
Calling zero_bss does this job for us, all we have to do is make sure we
don't try to mmap a zero-length page.
Signed-off-by: Giuseppe Musacchio <thatlemon@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20190503122007.lkjsvztgt4ycovac@debian>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This new chapter in the QEMU documentation covers the security
requirements that QEMU is designed to meet and principles for securely
deploying QEMU.
It is just a starting point that can be extended in the future with more
information.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-id: 20190509121820.16294-3-stefanha@redhat.com
Message-Id: <20190509121820.16294-3-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
At KVM Forum 2018 I gave a presentation on security in QEMU:
https://www.youtube.com/watch?v=YAdRf_hwxU8 (video)
https://vmsplice.net/~stefan/stefanha-kvm-forum-2018.pdf (slides)
This patch adds a guide to secure coding practices. This document
covers things that developers should know about security in QEMU. It is
just a starting point that we can expand on later. I hope it will be
useful as a resource for new contributors and will save code reviewers
from explaining the same concepts many times.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-id: 20190509121820.16294-2-stefanha@redhat.com
Message-Id: <20190509121820.16294-2-stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
With aio=thread, adaptive polling makes latency worse rather than
better, because it delays the execution of the ThreadPool's
completion bottom half.
event_notifier_poll() does run while polling, detecting that
a bottom half was scheduled by a worker thread, but because
ctx->notifier is explicitly ignored in run_poll_handlers_once(),
scheduling the BH does not count as making progress and
run_poll_handlers() keeps running. Fix this by recomputing
the deadline after *timeout could have changed.
With this change, ThreadPool still cannot participate in polling
but at least it does not suffer from extra latency.
Reported-by: Sergio Lopez <slp@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20190409122823.12416-1-pbonzini@redhat.com
Cc: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-block@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1553692145-86728-1-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20190409122823.12416-1-pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
On a file system used by the customer, fallocate() returns an error
if the block is not properly aligned. So, bdrv_co_pwrite_zeroes()
fails. We can handle that case the same way as it is done for the
unsupported cases, namely, call to bdrv_driver_pwritev() that writes
zeroes to an image for the unaligned chunk of the block.
Suggested-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 1554474244-553661-1-git-send-email-andrey.shinkevich@virtuozzo.com
Message-Id: <1554474244-553661-1-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
bdrv_check_co_entry calls bdrv_co_check, which is a coroutine function.
Thus, it also needs to be marked as a coroutine.
Signed-off-by: Nikita Alekseev <n.alekseev2104@gmail.com>
Message-id: 20190401093051.16488-1-n.alekseev2104@gmail.com
Message-Id: <20190401093051.16488-1-n.alekseev2104@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Add braces to fix errors issued by checkpatch.pl tool
"ERROR: braces {} are necessary for all arms of this statement"
Within "util/readline.c" file
Message-Id: <20190330112142.14082-1-jbi.octave@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Replace tab indent by four spaces to fix errors issued by checkpatch.pl tool
"ERROR: code indent should never use tabs" within "util/readline.c" file.
Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20190401024406.10819-3-jbi.octave@gmail.com
Message-Id: <20190401024406.10819-3-jbi.octave@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
util/readline: add a space to fix errors reported by checkpatch.pl tool
"ERROR: space required before the open parenthesis"
"ERROR: space required after that ..."
within "util/redline.c" file
Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 20190401024406.10819-2-jbi.octave@gmail.com
Message-Id: <20190401024406.10819-2-jbi.octave@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
In file included from /usr/include/string.h:494,
from include/qemu/osdep.h:101,
from linux-user/uname.c:20:
In function ‘strncpy’,
inlined from ‘sys_uname’ at linux-user/uname.c:94:3:
/usr/include/bits/string_fortified.h:106:10: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 64 [-Wstringop-truncation]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We don't care where the NUL terminator in the original uname
field was. It suffices to copy the entire original field and
simply force a NUL terminator at the end of the new field.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190501144646.4851-1-berrange@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Fix this warning when building with GCC9 on Fedora 30:
In function ‘strncpy’,
inlined from ‘fill_psinfo’ at /home/alistair/qemu/linux-user/elfload.c:3208:12,
inlined from ‘fill_note_info’ at /home/alistair/qemu/linux-user/elfload.c:3390:5,
inlined from ‘elf_core_dump’ at /home/alistair/qemu/linux-user/elfload.c:3539:9:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ specified bound 16 equals destination size [-Werror=stringop-truncation]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <c4d2b1de9efadcf1c900b91361af9302823a72a9.1556666645.git.alistair.francis@wdc.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
When running ssh over IPv6 with linux-user I faced this warning:
Unsupported setsockopt level=41 optname=67
setsockopt IPV6_TCLASS 32: Protocol not available:
This patch adds code to the linux-user emulatation for setting and
retrieving of a few missing IPV6 options, including IPV6_TCLASS.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
- Get rid of some more dependencies on the global_qtest variable in the qtests
- Some other small test clean-ups
- Some copyright statement clarifications
- Mark TARGET_FMT_lu as poisoned
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Merge remote-tracking branch 'remotes/huth-gitlab/tags/pull-request-2019-05-09' into staging
- Fix "make check" problem that occurred with LANG=C and Python 3.5 / 3.6
- Get rid of some more dependencies on the global_qtest variable in the qtests
- Some other small test clean-ups
- Some copyright statement clarifications
- Mark TARGET_FMT_lu as poisoned
# gpg: Signature made Thu 09 May 2019 08:45:47 BST
# gpg: using RSA key 2ED9D774FE702DB5
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* remotes/huth-gitlab/tags/pull-request-2019-05-09:
include/exec/poison: Mark TARGET_FMT_lu as poisoned, too
target/sh4: Fix LGPL information in the file headers
target/openrisc: Fix LGPL information in the file headers
hw/i2c/smbus_ich9: Fix the confusing contributions-after-2012 statement
tests: qpci_unplug_acpi_device_test() should not rely on global_qtest
tests/drive_del-test: Use qtest_init() instead of qtest_start()
tests/Makefile: Remove unused test-obj-y variable
tests/tpm-tests: Use g_test_skip() to mark skipped tests
tests/ide-test: Make test independent of global_qtest
tests/test-hmp: Use qtest_init() instead of qtest_start()
tests/qmp-cmd-test: Use qtest_init() instead of qtest_start()
tests/megasas: Make test independent of global_qtest
tests/tco: Make test independent of global_qtest
tests: Force Python I/O encoding for check-qapi-schema
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We already poison TARGET_FMT_lx and TARGET_FMT_ld, but apparently
forgot to poison TARGET_FMT_lu, too. Do it now.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20190508150608.3311-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
It's either "GNU *Library* General Public License version 2" or "GNU
Lesser General Public License version *2.1*", but there was no "version
2.0" of the "Lesser" license. So assume that version 2.1 is meant here.
Message-Id: <1550073530-4138-1-git-send-email-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
It's either "GNU *Library* General Public License version 2" or "GNU
Lesser General Public License version *2.1*", but there was no "version
2.0" of the "Lesser" license. So assume that version 2.1 is meant here.
Acked-by: Stafford Horne <shorne@gmail.com>
Message-Id: <1550073577-4248-1-git-send-email-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The license information in this file is rather confusing. The text
declares LGPL first, but then says that contributions after Jan 2012
are licensed under the GPL instead. How should the average user who
just downloaded the release tarball know which part is now GPL and
which is LGPL? Also, as far as I can see, the file has been added to
QEMU *after* January in 2012, so the whole file should be GPL by
default instead.
Furthermore, looking at the text of the LGPL (see COPYING.LIB in the
top directory), the license clearly states in section "3." that one
should rather replace the license information in such a case instead.
Thus let's clean up the confusing statements and use the proper GPL
text only.
Message-Id: <1549471435-21887-1-git-send-email-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
libqos functions should not use functions that require global_qtest to
be set, since such library functions could also be used by tests that
deal with multiple test states. Add a parameter to this function to
explicitly specify the test state.
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190508143209.24350-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
qtest_start() + qtest_end() should be avoided, since they use the
global_qtest variable that we want to get rid of in the long run
Use qtest_init() and qtest_quit() instead.
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190508142153.21555-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
I recently noticed that test-obj-y contains a file called
tests/check-block-qtest.o which simply does not belong to any .c
file and thus wondered why this is not causing any trouble. It is
only used to add -Itests to the command line (which refers to the
build directory). However, it is not needed because "-iquote $(@D)"
already sets this up in rules.mak. Thus we can simply remove this
variable.
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20190508075527.32164-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Since we do not use gtester anymore (which had a bug here),
we can now use g_test_skip() to mark skipped tests.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20190424094557.28404-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Pass around the QTestState, so we do not need the problematic global_qtest
variable (which causes trouble for tests that have multiple test states)
here anymore.
Message-Id: <20190409085245.31548-6-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
qtest_start() + qtest_end() should be avoided, since they use the
global_qtest variable that we want to get rid of in the long run
Use qtest_init() and qtest_quit() instead.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190409085245.31548-5-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
qtest_start() + qtest_end() should be avoided, since they use the
global_qtest variable that we want to get rid of in the long run
(since global_qtest can not be used in tests that have to track
multiple QEMU states, like migration tests). Use qtest_init() and
qtest_quit() instead.
Message-Id: <20190409085245.31548-4-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The test uses memwrite() and thus relies on global_qtest. Let's replace it
with qtest_memwrite(), so that we are independent from global_qtest here.
Message-Id: <20190409085245.31548-3-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Pass around the QTestState in the TestData, so we do not need the
global_qtest variable here anymore.
Message-Id: <20190409085245.31548-2-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
test-qapi.py doesn't force a specific encoding for stderr or
stdout, but the reference files used by check-qapi-schema are in
UTF-8. This breaks check-qapi-schema under certain circumstances
(e.g. if using the C locale and Python < 3.7).
We need to make sure test-qapi.py always generate UTF-8 output
somehow. On Python 3.7+ we can do it using
`sys.stdout.reconfigure(...)`, but we need a solution that works
with older Python versions.
Instead of trying a hack like reopening sys.stdout and
sys.stderr, we can just tell Python to use UTF-8 for I/O encoding
when running test-qapi.py. Do it by setting PYTHONIOENCODING.
Reported-by: Thomas Huth <thuth@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190506213817.14344-1-ehabkost@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
* Stop using variable length array in dc_zva
* Implement M-profile XPSR GE bits
* Don't enable ARMV7M_EXCP_DEBUG from reset
* armv7m_nvic: NS BFAR and BFSR are RAZ/WI if BFHFNMINS == 0
* armv7m_nvic: Check subpriority in nvic_recompute_state_secure()
* fix various minor issues to allow building for Windows-on-ARM64
* aspeed: Set SDRAM size
* Allow system registers for KVM guests to be changed by QEMU code
* raspi: Diagnose requests for too much RAM
* virt: Support firmware configuration with -blockdev
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20190507' into staging
target-arm queue:
* Stop using variable length array in dc_zva
* Implement M-profile XPSR GE bits
* Don't enable ARMV7M_EXCP_DEBUG from reset
* armv7m_nvic: NS BFAR and BFSR are RAZ/WI if BFHFNMINS == 0
* armv7m_nvic: Check subpriority in nvic_recompute_state_secure()
* fix various minor issues to allow building for Windows-on-ARM64
* aspeed: Set SDRAM size
* Allow system registers for KVM guests to be changed by QEMU code
* raspi: Diagnose requests for too much RAM
* virt: Support firmware configuration with -blockdev
# gpg: Signature made Tue 07 May 2019 12:59:30 BST
# gpg: using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg: issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg: aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg: aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83 15CF 3C25 25ED 1436 0CDE
* remotes/pmaydell/tags/pull-target-arm-20190507:
target/arm: Stop using variable length array in dc_zva
target/arm: Implement XPSR GE bits
hw/intc/armv7m_nvic: Don't enable ARMV7M_EXCP_DEBUG from reset
hw/intc/armv7m_nvic: NS BFAR and BFSR are RAZ/WI if BFHFNMINS == 0
hw/arm/armv7m_nvic: Check subpriority in nvic_recompute_state_secure()
osdep: Fix mingw compilation regarding stdio formats
util/cacheinfo: Use uint64_t on LLP64 model to satisfy Windows ARM64
qga: Fix mingw compilation warnings on enum conversion
QEMU_PACKED: Remove gcc_struct attribute in Windows non x86 targets
arm: aspeed: Set SDRAM size
arm: Allow system registers for KVM guests to be changed by QEMU code
hw/arm/raspi: Diagnose requests for too much RAM
hw/arm/virt: Support firmware configuration with -blockdev
pflash_cfi01: New pflash_cfi01_legacy_drive()
pc: Rearrange pc_system_firmware_init()'s legacy -drive loop
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
A recent patch results in qemu-img reporting the backing file format of
vmdk images as vmdk. This broke iotests 110 and 126.
Fixes: 7502be838e
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190415154129.31021-1-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This function combines bdrv_set_backing_hd() and bdrv_replace_node()
so we can use it to simplify the code a bit in commit_start().
Signed-off-by: Alberto Garcia <berto@igalia.com>
Message-id: 20190403143748.9790-1-berto@igalia.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
