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2018-06-29dump: add Windows dump format to dump-guest-memoryViktor Prutyanov
This patch adds Windows crashdumping feature. Now QEMU can produce ELF-dump containing Windows crashdump header, which can help to convert to a valid WinDbg-understandable crashdump file, or immediately create such file. The crashdump will be obtained by joining physical memory dump and 8K header exposed through vmcoreinfo/fw_cfg device by guest driver at BSOD time. Option '-w' was added to dump-guest-memory command. At the moment, only x64 configuration is supported. Suitable driver can be found at https://github.com/virtio-win/kvm-guest-drivers-windows/tree/master/fwcfg64 Signed-off-by: Viktor Prutyanov <viktor.prutyanov@virtuozzo.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180517162342.4330-2-viktor.prutyanov@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-20Makefile.target: add (clean-/build-)guest-tests targetsAlex Bennée
Now all the build infrastructure is in place we can build tests for each guest that we support. That support mainly depends on having cross compilers installed or docker setup. To keep all the logic for that together we put the rules in tests/tcg/Makefile.include and include it from the main Makefile.target. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2018-06-01tcg: remove softfloat from --disable-tcg buildsPaolo Bonzini
Even though the presence of softfloat does not cause --disable-tcg builds to fail, it is the single largest .o file in them. Remove it, since TCG is the only client. Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-03-23make: switch from -I to -iquoteMichael S. Tsirkin
Our rule right now is to use <> for external headers, "" for internal ones. The idea was to avoid conflicts between e.g. a system file named <trace.h> and an internal one by the same name. Unfortunately we use -I compiler flag so it does not help: a system file doing #include <trace.h> will still pick up ours first. To fix, switch to -iquote which is supported by both gcc and clang and only affects #include "" directives. As a side effect, this catches any future uses of #include <> for internal headers. Suggested-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
2018-02-08tcg: Add generic vector expandersRichard Henderson
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-02-08tcg: Add types and basic operations for host vectorsRichard Henderson
Nothing uses or enables them yet. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-11-23Fix build of console and GUI executables for WindowsStefan Weil
It was broken by commit 8ecc89f6e792152496eccb684d6c8c48aba8027d which moved the SDL linker flags from macro libs_softmmu to macro SDL_LIBS. Signed-off-by: Stefan Weil <sw@weilnetz.de> Message-id: 20171116163732.31584-1-sw@weilnetz.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-10-16build: remove CONFIG_LIBDECNUMBERPaolo Bonzini
It is used by all PPC targets; we can give the directory its own Makefile.objs file, and include it directly from target/ppc. target/s390 can do the same when it starts using it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-19accel/hax: move hax-stub.c to accel/stubs/Philippe Mathieu-Daudé
Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20170913221149.30382-1-f4bug@amsat.org> Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-09-19Makefile: Remove libqemustub.aPaolo Bonzini
Using two libraries (libqemuutil.a and libqemustub.a) would sometimes result in circular dependencies. To avoid these issues let's just combine both into a single library that functions as both. Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Message-Id: <54e6458745493d10901964624479a7d9a872f481.1503077821.git.alistair.francis@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-09-17accel/tcg: move tcg-runtime to accel/tcg/Philippe Mathieu-Daudé
Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20170911213328.9701-4-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-09-17accel/tcg: move user-exec to accel/tcg/Philippe Mathieu-Daudé
Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20170911213328.9701-3-f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-08-01trace: ensure .stp files are rebuilt if trace tool source changesDaniel P. Berrange
The make rules for generating the .stp files forgot to add a dep on $(tracetool-y) to trigger a rebuild if the trace tool source changes. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170728133631.5449-1-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-07-05tcg: add the CONFIG_TCG into MakefilesYang Zhong
Add the CONFIG_TCG for frontend and backend's files in the related Makefiles. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-04Makefile: Move bootdevice.o to common-obj-yThomas Huth
There does not seem to be any target specific code in this file, so we can put it into "common-obj" instead of "obj" to compile it only once for all targets. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1498454578-18709-7-git-send-email-thuth@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-20tcg/tci: fix tcg-interpreter buildPhilippe Mathieu-Daudé
fix regression from commit 244f144134: $ make subdir-arm-softmmu make[1]: *** No rule to make target 'tci.o', needed by 'qemu-system-arm'. Stop. Makefile:328: recipe for target 'subdir-arm-softmmu' failed make: *** [subdir-arm-softmmu] Error 2 Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20170620163009.21764-1-f4bug@amsat.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-06-15accel: move kvm related accelerator files into accel/Yang Zhong
move kvm related accelerator files into accel/ subdirectory, also create one stub subdirectory, which will include accelerator's stub files. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <1496383606-18060-5-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-15tcg: move tcg backend files into accel/tcg/Yang Zhong
move tcg-runtime.c, translate-all.(ch) and translate-common.c into accel/tcg/ subdirectory and updated related trace-events file. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <1496383606-18060-4-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-15tcg: move tcg related files into accel/tcg/ subdirectoryYang Zhong
move cputlb.c, cpu-exec-common.c and cpu-exec.c related tcg exec file into accel/tcg/ subdirectory. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <1496383606-18060-3-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-15accel: split the tcg accelerator from accel.c fileYang Zhong
there are some types of accelerators in qemu, and all accelerators have their own file except tcg. tcg accelerator is also defined in accel.c file. tcg accelerator file will be splited from accel.c and re-name to tcg-all.c. accel/ directory will be created to include kvm and tcg related files. Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <1496383606-18060-2-git-send-email-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-05-18migration: Make savevm.c target independentJuan Quintela
It only needed TARGET_PAGE_SIZE/BITS/BITS_MIN values, so just export them from exec.h Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-26Merge remote-tracking branch 'remotes/sstabellini/tags/xen-20170421-v2-tag' ↵Peter Maydell
into staging Xen 2017/04/21 + fix # gpg: Signature made Tue 25 Apr 2017 19:10:37 BST # gpg: using RSA key 0x894F8F4870E1AE90 # gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>" # gpg: aka "Stefano Stabellini <sstabellini@kernel.org>" # Primary key fingerprint: D04E 33AB A51F 67BA 07D3 0AEA 894F 8F48 70E1 AE90 * remotes/sstabellini/tags/xen-20170421-v2-tag: (21 commits) move xen-mapcache.c to hw/i386/xen/ move xen-hvm.c to hw/i386/xen/ move xen-common.c to hw/xen/ add xen-9p-backend to MAINTAINERS under Xen xen/9pfs: build and register Xen 9pfs backend xen/9pfs: send responses back to the frontend xen/9pfs: implement in/out_iov_from_pdu and vmarshal/vunmarshal xen/9pfs: receive requests from the frontend xen/9pfs: connect to the frontend xen/9pfs: introduce Xen 9pfs backend 9p: introduce a type for the 9p header xen: import ring.h from xen configure: use pkg-config for obtaining xen version xen: additionally restrict xenforeignmemory operations xen: use libxendevice model to restrict operations xen: use 5 digit xen versions xen: use libxendevicemodel when available configure: detect presence of libxendevicemodel xen: create wrappers for all other uses of xc_hvm_XXX() functions xen: rename xen_modified_memory() to xen_hvm_modified_memory() ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-25move xen-mapcache.c to hw/i386/xen/Anthony Xu
move xen-mapcache.c to hw/i386/xen/ Signed-off -by: Anthony Xu <anthony.xu@intel.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2017-04-25move xen-hvm.c to hw/i386/xen/Anthony Xu
move xen-hvm.c to hw/i386/xen/ Signed-off -by: Anthony Xu <anthony.xu@intel.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2017-04-25move xen-common.c to hw/xen/Anthony Xu
move xen-common.c to hw/xen/ Signed-off -by: Anthony Xu <anthony.xu@intel.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2017-04-21trace: Put all trace.o into libqemuutil.aXu, Anthony
Currently all trace.o are linked into qemu-system, qemu-img, qemu-nbd, qemu-io etc., even the corresponding components are not included. Put all trace.o into libqemuutil.a that the linker would only pull in .o files containing symbols that are actually referenced by the program. Signed-off -by: Anthony Xu <anthony.xu@intel.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-03-16makefile: merge GENERATED_HEADERS & GENERATED_SOURCES variablesDaniel P. Berrange
The only functional difference between the GENERATED_HEADERS and GENERATED_SOURCES variables is that 'Makefile' has a dependancy on GENERATED_HEADERS, causing generated header files to be created immediatey at the start of the build process. There is no reason why this early creation should be restricted to the .h files, and not include .c files too. Merge both of the variables into a single GENERATED_FILES variable to make it clear it is for any type of generated file. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 20170228122901.24520-2-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-02-02Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' ↵Peter Maydell
into staging # gpg: Signature made Wed 01 Feb 2017 13:44:32 GMT # gpg: using RSA key 0x9CA4ABB381AB73C8 # gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>" # gpg: aka "Stefan Hajnoczi <stefanha@gmail.com>" # Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35 775A 9CA4 ABB3 81AB 73C8 * remotes/stefanha/tags/tracing-pull-request: trace: clean up trace-events files qapi: add missing trace_visit_type_enum() call trace: improve error reporting when parsing simpletrace header trace: update docs to reflect new code generation approach trace: switch to modular code generation for sub-directories trace: move setting of group name into Makefiles trace: move hw/i386/xen events to correct subdir trace: move hw/xen events to correct subdir trace: move hw/block/dataplane events to correct subdir make: move top level dir to end of include search path # Conflicts: # Makefile Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-01-31char: create chardev-obj-yMarc-André Lureau
This will help to split char.c in several units without having to reference them all everywhere. This is useful in particular for tests. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2017-01-31trace: switch to modular code generation for sub-directoriesDaniel P. Berrange
Introduce rules in the top level Makefile that are able to generate trace.[ch] files in every subdirectory which has a trace-events file. The top level directory is handled specially, so instead of creating trace.h, it creates trace-root.h. This allows sub-directories to include the top level trace-root.h file, without ambiguity wrt to the trace.g file in the current sub-dir. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170125161417.31949-7-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-01-31trace: move setting of group name into MakefilesDaniel P. Berrange
Having tracetool.py figure out the right group name from just the input filename is not practical when considering the different build vs src path combinations. Instead simply take the group name as a command line arg from the Makefile, which can trivially provide the right name. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170125161417.31949-6-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-01-19Plumb the HAXM-based hardware acceleration supportVincent Palatin
Use the Intel HAX is kernel-based hardware acceleration module for Windows (similar to KVM on Linux). Based on the "target/i386: Add Intel HAX to android emulator" patch from David Chou <david.j.chou@intel.com> Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Message-Id: <7b9cae28a0c379ab459c7a8545c9a39762bd394f.1484045952.git.vpalatin@chromium.org> [Drop hax_populate_ram stub. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-16stubs: group stubs for user-mode emulationPaolo Bonzini
Some stubs are used for user-mode emulation only; they are not needed by tools. Move them out of stubs/. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-12-22rules.mak: add more rules to avoid chainingPaolo Bonzini
Really rule chaining is not a particularly expensive task, since GNU Make caches the directory listing. However it is easy to avoid it for most files and for phony targets (one was missing). After this patch, only "Makefile", "scripts/hxtool" and "scripts/create_config" attempt to use chained rules. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-12-20Move target-* CPU file into a target/ folderThomas Huth
We've currently got 18 architectures in QEMU, and thus 18 target-xxx folders in the root folder of the QEMU source tree. More architectures (e.g. RISC-V, AVR) are likely to be included soon, too, so the main folder of the QEMU sources slowly gets quite overcrowded with the target-xxx folders. To disburden the main folder a little bit, let's move the target-xxx folders into a dedicated target/ folder, so that target-xxx/ simply becomes target/xxx/ instead. Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part] Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part] Acked-by: Michael Walle <michael@walle.cc> [lm32 part] Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part] Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part] Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part] Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part] Acked-by: Richard Henderson <rth@twiddle.net> [alpha part] Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part] Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part] Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [cris&microblaze part] Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part] Signed-off-by: Thomas Huth <thuth@redhat.com>
2016-10-26tcg: Add atomic helpersRichard Henderson
Add all of cmpxchg, op_fetch, fetch_op, and xchg. Handle both endian-ness, and sizes up to 8. Handle expanding non-atomically, when emulating in serial. Reviewed-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
2016-10-12trace: pass trace-events to tracetool as a positional paramDaniel P. Berrange
Instead of reading the contents of 'trace-events' from stdin, accept the filename as a positional parameter. This also allows for reading from multiple files, though this facility is not used at this time. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-20-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-10-06rules.mak: quiet-command: Split command name and args to printPeter Maydell
The quiet-command make rule currently takes two arguments: the command and arguments to run, and a string to print if the V flag is not set (ie we are not being verbose). By convention, the string printed is of the form " NAME some args". Unfortunately to get nicely lined up output all the strings have to agree about what column the arguments should start in, which means that if we add a new quiet-command usage which wants a slightly longer CMD name then we either put up with misalignment or change every quiet-command string. Split the quiet-mode string into two, the "NAME" and the "same args" part, and use printf(1) to format the string automatically. This means we only need to change one place if we want to support a longer maximum name. In particular, we can now print 7-character names lined up properly (they are needed for the OSX "SETTOOL" invocation). Change all the uses of quiet-command to the new syntax. (Any which are missed or inadvertently reintroduced via later merges will result in slightly misformatted quiet output rather than disaster.) A few places in the pc-bios/ makefiles are updated to use "BUILD", "SIGN" and "STRIP" rather than "Building", "Signing" and "Stripping" for consistency and to keep them below 7 characters. Module .mo links now print "LD" rather than the nonstandard "LD -r". Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1475598441-27908-1-git-send-email-peter.maydell@linaro.org
2016-09-19build-sys: remove qmp-commands-old.hMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20160912091913.15831-17-marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-09-06s390x/cpumodel: generate CPU feature lists for CPU modelsMichael Mueller
This patch introduces the helper "gen-features" which allows to generate feature list definitions at compile time. Its flexibility is better and the error-proneness is lower when compared to static programming time added statements. The helper includes "target-s390x/cpu_features.h" to be able to use named facility bits instead of numbers. The generated defines will be used for the definition of CPU models. We generate feature lists for each HW generation and GA for EC models. BC models are always based on a EC version and have no separate definitions. Base features: Features we expect to be always available in sane setups. Migration safe - will never change. Can be seen as "minimum features required for a CPU model". Default features: Features we expect to be stable and around in latest setups (e.g. having KVM support) - not migration safe. Max features: All supported features that are theoretically allowed for a CPU model. Exceeding these features could otherwise produce problems with IBC (instruction blocking controls) in KVM. Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> [generate base, default and models. renaming and cleanup] Message-Id: <20160905085244.99980-6-dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-06-26linux-user: Create a hostdep.h for each host architecturePeter Maydell
In commit 4d330cee37a21 a new hostdep.h file was added, with the intent that host architectures which needed one could provide it, and the build system would automatically fall back to a generic version if there was no version for the host architecture. Although this works, it has a flaw: if a subsequent commit switches an architecture from "uses generic/hostdep.h" to "uses its own hostdep.h" nothing in the makefile dependencies notices this and so doing a rebuild without a manual 'make clean' will fail. So we drop the idea of having a 'generic' version in favour of every architecture we support having its own hostdep.h, even if it doesn't have anything in it. (There are only thirteen of these.) If the dependency files claim that an object file depends on a nonexistent file, our dependency system means that make will rebuild the object file, and regenerate the dependencies in the process. So moving between trees prior to this commit and trees after this commit works without requiring a 'make clean'. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2016-06-20trace: add build framework for merging trace-events filesDaniel P. Berrange
Switch make rules over to use trace-events-all as the master trace events input file. Add rule that will construct trace-events-all from $(trace-events-y). Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1466066426-16657-2-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-06-07Makefile: add dependency on scripts/hxtoolPaolo Bonzini
Make sure that the various documentation and C code files are rebuilt whenever there is a change in the script that splits them out of .hx files. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-27linux-user: Provide safe_syscall for fixing races between signals and syscallsTimothy E Baldwin
If a signal is delivered immediately before a blocking system call the handler will only be called after the system call returns, which may be a long time later or never. This is fixed by using a function (safe_syscall) that checks if a guest signal is pending prior to making a system call, and if so does not call the system call and returns -TARGET_ERESTARTSYS. If a signal is received between the check and the system call host_signal_handler() rewinds execution to before the check. This rewinding has the effect of closing the race window so that safe_syscall will reliably either (a) go into the host syscall with no unprocessed guest signals pending or or (b) return -TARGET_ERESTARTSYS so that the caller can deal with the signals. Implementing this requires a per-host-architecture assembly language fragment. This will also resolve the mishandling of the SA_RESTART flag where we would restart a host system call and not call the guest signal handler until the syscall finally completed -- syscall restarting now always happens at the guest syscall level so the guest signal handler will run. (The host syscall will never be restarted because if the host kernel rewinds the PC to point at the syscall insn for a restart then our host_signal_handler() will see this and arrange the guest PC rewind.) This commit contains the infrastructure for implementing safe_syscall and the assembly language fragment for x86-64, but does not change any syscalls to use it. Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk> Message-id: 1441497448-32489-14-git-send-email-T.E.Baldwin99@members.leeds.ac.uk [PMM: * Avoid having an architecture if-ladder in configure by putting linux-user/host/$(ARCH) on the include path and including safe-syscall.inc.S from it * Avoid ifdef ladder in signal.c by creating new hostdep.h to hold host-architecture-specific things * Added copyright/license header to safe-syscall.inc.S * Rewrote commit message * Added comments to safe-syscall.inc.S * Changed calling convention of safe_syscall() to match syscall() (returns -1 and host error in errno on failure) * Added a long comment in qemu.h about how to use safe_syscall() to implement guest syscalls. ] RV: squashed Peters "fixup! linux-user: compile on non-x86-64 hosts" patch Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-12-18io: add abstract QIOChannel classesDaniel P. Berrange
Start the new generic I/O channel framework by defining a QIOChannel abstract base class. This is designed to feel similar to GLib's GIOChannel, but with the addition of support for using iovecs, qemu error reporting, file descriptor passing, coroutine integration and use of the QOM framework for easier sub-classing. The intention is that anywhere in QEMU that almost anywhere that deals with sockets will use this new I/O infrastructure, so that it becomes trivial to then layer in support for TLS encryption. This will at least include the VNC server, char device backend and migration code. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-09-16Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
* Linux header update and cleanup * Support for HyperV crash report * Cleanup of target-specific HMP commands * Multiarch batch * Checkpatch fix for Perl 5.22 * NBD fix * Revert incorrect commit 5243722376 # gpg: Signature made Wed 16 Sep 2015 16:39:01 BST using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" * remotes/bonzini/tags/for-upstream: (24 commits) nbd: release exp->blk after all clients are closed checkpatch: Escape left braces in regex monitor: uninclude cpu_ldst include/exec: Move cputlb exec.c defs out cputlb: Change tlb_set_dirty() arg to cpu cputlb: move CPU_LOOP() for tlb_reset() to exec.c translate: move real_host_page setting to -common tcg: Move tci_tb_ptr to -common tcg: split tcg_op_defs to -common translate-all: Move tcg_handle_interrupt() to -common cpu-exec: Migrate some generic fns to cpu-exec-common qemu-char: Use g_new() & friends where that makes obvious sense monitor: added generation of documentation for hmp-commands-info.hx hmp-commands.hx: fix end of table info monitor: remove target-specific code from monitor.c hmp-commands-info: move info_cmds content out of monitor.c i386/kvm: Hyper-v crash msrs set/get'ers and migration kvm: Add kvm system event crash handler cpu: Add crash_occurred flag into CPUState target-i386: move asm-x86/hyperv.h to standard-headers ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-16tcg: split tcg_op_defs to -commonPeter Crosthwaite
tcg_op_defs (and the _max) are both needed by the TCI disassembler. For multi-arch, tcg.c will be multiple-compiled (arch-obj) with its symbols hidden from common code. So split the definition off to new file, tcg-common.c which will remain a regular obj-y for use by both the TCI disas as well as the multiple tcg.c's. Cc: Stefan Weil <sw@weilnetz.de> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Message-Id: <4b607425886d85aee65878e4935dfad46b3e6085.1441614289.git.crosthwaite.peter@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16translate-all: Move tcg_handle_interrupt() to -commonPeter Crosthwaite
Move this function to common code. It has no arch specific dependencies. Prepares support for multi-arch where the translate-all interface needs to be virtualised. One less thing to virtualise. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Message-Id: <44a7c73604ed2552af47ed02b047b6a772b683e0.1441614289.git.crosthwaite.peter@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16cpu-exec: Migrate some generic fns to cpu-exec-commonPeter Crosthwaite
The goal is to split the functions such that cpu-exec is CPU specific content, while cpus-exec-common.c is generic code only. The function interface to cpu-exec needs to be virtualised to prepare support for multi-arch and moving these definitions out saves bloating the QOM interface. So move these definitions out of cpu-exec to a new module, cpu-exec-common. Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Message-Id: <3cefeb3fbbb33031670951a0e74de2778529da3f.1441614289.git.crosthwaite.peter@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-16hmp-commands-info: move info_cmds content out of monitor.cPavel Butsykin
For moving target- and device-specific code from monitor.c, to beginning we move info_cmds content to hmp-commands-info.hx Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Peter Maydell <peter.maydell@linaro.org> Message-Id: <1441899541-1856-2-git-send-email-den@openvz.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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