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* softmmu/vl.c: Handle '-cpu help' and '-device help' before 'no default machine'Peter Maydell2020-03-161-10/+16
| | | | | | | | | | | | | | | | | | | | Currently if you try to ask for the list of CPUs for a target architecture which does not specify a default machine type you just get an error: $ qemu-system-arm -cpu help qemu-system-arm: No machine specified, and there is no default Use -machine help to list supported machines Since the list of CPUs doesn't depend on the machine, this is unnecessarily unhelpful. "-device help" has a similar problem. Move the checks for "did the user ask for -cpu help or -device help" up so they precede the select_machine() call which checks that the user specified a valid machine type. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* vl: Add missing "hw/boards.h" includePhilippe Mathieu-Daudé2020-03-091-0/+1
| | | | | | | | | | | | | | | | | | | | vl.c calls machine_usb() declared in "hw/boards.h". Include it. This fixes (when modifying unrelated headers): vl.c:1283:10: error: implicit declaration of function 'machine_usb' is invalid in C99 [-Werror,-Wimplicit-function-declaration] if (!machine_usb(current_machine)) { ^ vl.c:1283:10: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes] vl.c:1283:22: error: use of undeclared identifier 'current_machine' if (!machine_usb(current_machine)) { ^ Acked-by: John Snow <jsnow@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20200228114649.12818-2-philmd@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* vl: Abort if multiple machines are registered as defaultPhilippe Mathieu-Daudé2020-02-281-2/+4
| | | | | | | | | | | | It would be confusing to have multiple default machines. Abort if this ever occurs. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200207161948.15972-4-philmd@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Tested-by: Laurent Vivier <laurent@vivier.eu>
* migration: Add support for modulesJuan Quintela2020-02-281-0/+1
| | | | | | | So we don't have to compile everything in, or have ifdefs Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* softmmu/vl.c: fix too slow TCG regressionIgor Mammedov2020-02-271-25/+29
| | | | | | | | | | | | | | | | Commit a1b18df9a4 moved -m option parsing after configure_accelerators() that broke TCG accelerator initialization which accesses global ram_size from size_code_gen_buffer() which is equal to 0 at that moment. Partially revert a1b18df9a4, by returning set_memory_options() to its original location and only keep 32-bit host VA check and 'memory-backend' size check introduced by fe64d06afc at current place. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* Merge tag 'patchew/20200219160953.13771-1-imammedo@redhat.com' of ↵Paolo Bonzini2020-02-251-15/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | https://github.com/patchew-project/qemu into HEAD This series removes ad hoc RAM allocation API (memory_region_allocate_system_memory) and consolidates it around hostmem backend. It allows to * resolve conflicts between global -mem-prealloc and hostmem's "policy" option, fixing premature allocation before binding policy is applied * simplify complicated memory allocation routines which had to deal with 2 ways to allocate RAM. * reuse hostmem backends of a choice for main RAM without adding extra CLI options to duplicate hostmem features. A recent case was -mem-shared, to enable vhost-user on targets that don't support hostmem backends [1] (ex: s390) * move RAM allocation from individual boards into generic machine code and provide them with prepared MemoryRegion. * clean up deprecated NUMA features which were tied to the old API (see patches) - "numa: remove deprecated -mem-path fallback to anonymous RAM" - (POSTPONED, waiting on libvirt side) "forbid '-numa node,mem' for 5.0 and newer machine types" - (POSTPONED) "numa: remove deprecated implicit RAM distribution between nodes" Introduce a new machine.memory-backend property and wrapper code that aliases global -mem-path and -mem-alloc into automatically created hostmem backend properties (provided memory-backend was not set explicitly given by user). A bulk of trivial patches then follow to incrementally convert individual boards to using machine.memory-backend provided MemoryRegion. Board conversion typically involves: * providing MachineClass::default_ram_size and MachineClass::default_ram_id so generic code could create default backend if user didn't explicitly provide memory-backend or -m options * dropping memory_region_allocate_system_memory() call * using convenience MachineState::ram MemoryRegion, which points to MemoryRegion allocated by ram-memdev On top of that for some boards: * missing ram_size checks are added (typically it were boards with fixed ram size) * ram_size fixups are replaced by checks and hard errors, forcing user to provide correct "-m" values instead of ignoring it and continuing running. After all boards are converted, the old API is removed and memory allocation routines are cleaned up.
* main: keep rcu_atfork callback enabled for qtestAlexander Bulekov2020-02-221-1/+11
| | | | | | | | | | | | The qtest-based fuzzer makes use of forking to reset-state between tests. Keep the callback enabled, so the call_rcu thread gets created within the child process. Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20200220041118.23264-15-alxndr@bu.edu Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* softmmu: split off vl.c:main() into main.cAlexander Bulekov2020-02-223-27/+63
| | | | | | | | | | | | | | | | A program might rely on functions implemented in vl.c, but implement its own main(). By placing main into a separate source file, there are no complaints about duplicate main()s when linking against vl.o. For example, the virtual-device fuzzer uses a main() provided by libfuzzer, and needs to perform some initialization before running the softmmu initialization. Now, main simply calls three vl.c functions which handle the guest initialization, main loop and cleanup. Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Message-id: 20200220041118.23264-3-alxndr@bu.edu Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
* softmmu: move vl.c to softmmu/Alexander Bulekov2020-02-222-0/+4449
Move vl.c to a separate directory, similar to linux-user/ Update the chechpatch and get_maintainer scripts, since they relied on /vl.c for top_of_tree checks. Signed-off-by: Alexander Bulekov <alxndr@bu.edu> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Message-id: 20200220041118.23264-2-alxndr@bu.edu Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>