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2020-03-16misc: Replace zero-length arrays with flexible array member (automatic)Philippe Mathieu-Daudé
Description copied from Linux kernel commit from Gustavo A. R. Silva (see [3]): --v-- description start --v-- The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member [1], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being unadvertenly introduced [2] to the Linux codebase from now on. --^-- description end --^-- Do the similar housekeeping in the QEMU codebase (which uses C99 since commit 7be41675f7cb). All these instances of code were found with the help of the following Coccinelle script: @@ identifier s, m, a; type t, T; @@ struct s { ... t m; - T a[0]; + T a[]; }; @@ identifier s, m, a; type t, T; @@ struct s { ... t m; - T a[0]; + T a[]; } QEMU_PACKED; [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76497732932f [3] https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/commit/?id=17642a2fbd2c1 Inspired-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12build: move TARGET_GPROF to config-host.makPaolo Bonzini
TARGET_GPROF is the same for all targets, write it to config-host.mak instead. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: <20200204161104.21077-1-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-01-15tcg: Search includes from the project root source directoryPhilippe Mathieu-Daudé
We currently search both the root and the tcg/ directories for tcg files: $ git grep '#include "tcg/' | wc -l 28 $ git grep '#include "tcg[^/]' | wc -l 94 To simplify the preprocessor search path, unify by expliciting the tcg/ directory. Patch created mechanically by running: $ for x in \ tcg.h tcg-mo.h tcg-op.h tcg-opc.h \ tcg-op-gvec.h tcg-gvec-desc.h; do \ sed -i "s,#include \"$x\",#include \"tcg/$x\"," \ $(git grep -l "#include \"$x\""); \ done Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts) Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200101112303.20724-2-philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-12-19linux-user: log page table changes under -d pageAlex Bennée
The CPU_LOG_PAGE flag is woefully underused and could stand to do extra duty tracking page changes. If the user doesn't want to see the details as things change they still have the tracepoints available. We push the locking into log_page_dump and pass a reason for the banner text. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20191205122518.10010-5-alex.bennee@linaro.org>
2019-10-28*-user: plugin syscallsEmilio G. Cota
To avoid too much duplication add a wrapper that the existing trace and the new plugin calls can live in. We could move the -strace code here as well but that is left for a future series as the code is subtly different between the bsd and linux. Signed-off-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> [AJB: wrap in syscall-trace.h, expand commit msg] Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2019-10-28*-user: notify plugin of exitEmilio G. Cota
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
2019-06-12Include qemu-common.h exactly where neededMarkus Armbruster
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
2019-06-12Include qemu/module.h where needed, drop it from qemu-common.hMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-4-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for hw/usb/dev-hub.c hw/misc/exynos4210_rng.c hw/misc/bcm2835_rng.c hw/misc/aspeed_scu.c hw/display/virtio-vga.c hw/arm/stm32f205_soc.c; ui/cocoa.m fixed up]
2019-06-11qemu-common: Move tcg_enabled() etc. to sysemu/tcg.hMarkus Armbruster
Other accelerators have their own headers: sysemu/hax.h, sysemu/hvf.h, sysemu/kvm.h, sysemu/whpx.h. Only tcg_enabled() & friends sit in qemu-common.h. This necessitates inclusion of qemu-common.h into headers, which is against the rules spelled out in qemu-common.h's file comment. Move tcg_enabled() & friends into their own header sysemu/tcg.h, and adjust #include directives. Cc: Richard Henderson <rth@twiddle.net> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-2-armbru@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> [Rebased with conflicts resolved automatically, except for accel/tcg/tcg-all.c]
2019-06-10target/sparc: Use env_cpu, env_archcpuRichard Henderson
Cleanup in the boilerplate that each target must define. Replace sparc_env_get_cpu with env_archcpu. The combination CPU(sparc_env_get_cpu) should have used ENV_GET_CPU to begin; use env_cpu now. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-06-10target/i386: Use env_cpu, env_archcpuRichard Henderson
Cleanup in the boilerplate that each target must define. Replace x86_env_get_cpu with env_archcpu. The combination CPU(x86_env_get_cpu) should have used ENV_GET_CPU to begin; use env_cpu now. Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-06-10cpu: Replace ENV_GET_CPU with env_cpuRichard Henderson
Now that we have both ArchCPU and CPUArchState, we can define this generically instead of via macro in each target's cpu.h. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-04-25cpu: Rename parse_cpu_model() to parse_cpu_option()Eduardo Habkost
The "model[,option...]" string parsed by the function is not just a CPU model. Rename the function and its argument to indicate it expects the full "-cpu" option to be provided. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20190417025944.16154-2-ehabkost@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2019-04-18qom/cpu: Simplify how CPUClass:cpu_dump_state() printsMarkus Armbruster
CPUClass method dump_statistics() takes an fprintf()-like callback and a FILE * to pass to it. Most callers pass fprintf() and stderr. log_cpu_state() passes fprintf() and qemu_log_file. hmp_info_registers() passes monitor_fprintf() and the current monitor cast to FILE *. monitor_fprintf() casts it right back, and is otherwise identical to monitor_printf(). The callback gets passed around a lot, which is tiresome. The type-punning around monitor_fprintf() is ugly. Drop the callback, and call qemu_fprintf() instead. Also gets rid of the type-punning, since qemu_fprintf() takes NULL instead of the current monitor cast to FILE *. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20190417191805.28198-15-armbru@redhat.com>
2019-04-18target: Simplify how the TARGET_cpu_list() printMarkus Armbruster
The various TARGET_cpu_list() take an fprintf()-like callback and a FILE * to pass to it. Their callers (vl.c's main() via list_cpus(), bsd-user/main.c's main(), linux-user/main.c's main()) all pass fprintf() and stdout. Thus, the flexibility provided by the (rather tiresome) indirection isn't actually used. Drop the callback, and call qemu_printf() instead. Calling printf() would also work, but would make the code unsuitable for monitor context without making it simpler. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190417191805.28198-10-armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2019-04-17log: Make glib logging go through QEMUChristophe Fergeau
This commit adds a error_init() helper which calls g_log_set_default_handler() so that glib logs (g_log, g_warning, ...) are handled similarly to other QEMU logs. This means they will get a timestamp if timestamps are enabled, and they will go through the HMP monitor if one is configured. This commit also adds a call to error_init() to the binaries installed by QEMU. Since error_init() also calls error_set_progname(), this means that *-linux-user, *-bsd-user and qemu-pr-helper messages output with error_report, info_report, ... will slightly change: they will be prefixed by the binary name. glib debug messages are enabled through G_MESSAGES_DEBUG similarly to the glib default log handler. At the moment, this change will mostly impact SPICE logging if your spice version is >= 0.14.1. With older spice versions, this is not going to work as expected, but will not have any ill effect, so this call is not conditional on the SPICE version. Signed-off-by: Christophe Fergeau <cfergeau@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20190131164614.19209-3-cfergeau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2019-01-11avoid TABs in files that only contain a fewPaolo Bonzini
Most files that have TABs only contain a handful of them. Change them to spaces so that we don't confuse people. disas, standard-headers, linux-headers and libdecnumber are imported from other projects and probably should be exempted from the check. Outside those, after this patch the following files still contain both 8-space and TAB sequences at the beginning of the line. Many of them have a majority of TABs, or were initially committed with all tabs. bsd-user/i386/target_syscall.h bsd-user/x86_64/target_syscall.h crypto/aes.c hw/audio/fmopl.c hw/audio/fmopl.h hw/block/tc58128.c hw/display/cirrus_vga.c hw/display/xenfb.c hw/dma/etraxfs_dma.c hw/intc/sh_intc.c hw/misc/mst_fpga.c hw/net/pcnet.c hw/sh4/sh7750.c hw/timer/m48t59.c hw/timer/sh_timer.c include/crypto/aes.h include/disas/bfd.h include/hw/sh4/sh.h libdecnumber/decNumber.c linux-headers/asm-generic/unistd.h linux-headers/linux/kvm.h linux-user/alpha/target_syscall.h linux-user/arm/nwfpe/double_cpdo.c linux-user/arm/nwfpe/fpa11_cpdt.c linux-user/arm/nwfpe/fpa11_cprt.c linux-user/arm/nwfpe/fpa11.h linux-user/flat.h linux-user/flatload.c linux-user/i386/target_syscall.h linux-user/ppc/target_syscall.h linux-user/sparc/target_syscall.h linux-user/syscall.c linux-user/syscall_defs.h linux-user/x86_64/target_syscall.h slirp/cksum.c slirp/if.c slirp/ip.h slirp/ip_icmp.c slirp/ip_icmp.h slirp/ip_input.c slirp/ip_output.c slirp/mbuf.c slirp/misc.c slirp/sbuf.c slirp/socket.c slirp/socket.h slirp/tcp_input.c slirp/tcpip.h slirp/tcp_output.c slirp/tcp_subr.c slirp/tcp_timer.c slirp/tftp.c slirp/udp.c slirp/udp.h target/cris/cpu.h target/cris/mmu.c target/cris/op_helper.c target/sh4/helper.c target/sh4/op_helper.c target/sh4/translate.c tcg/sparc/tcg-target.inc.c tests/tcg/cris/check_addo.c tests/tcg/cris/check_moveq.c tests/tcg/cris/check_swap.c tests/tcg/multiarch/test-mmap.c ui/vnc-enc-hextile-template.h ui/vnc-enc-zywrle.h util/envlist.c util/readline.c The following have only TABs: bsd-user/i386/target_signal.h bsd-user/sparc64/target_signal.h bsd-user/sparc64/target_syscall.h bsd-user/sparc/target_signal.h bsd-user/sparc/target_syscall.h bsd-user/x86_64/target_signal.h crypto/desrfb.c hw/audio/intel-hda-defs.h hw/core/uboot_image.h hw/sh4/sh7750_regnames.c hw/sh4/sh7750_regs.h include/hw/cris/etraxfs_dma.h linux-user/alpha/termbits.h linux-user/arm/nwfpe/fpopcode.h linux-user/arm/nwfpe/fpsr.h linux-user/arm/syscall_nr.h linux-user/arm/target_signal.h linux-user/cris/target_signal.h linux-user/i386/target_signal.h linux-user/linux_loop.h linux-user/m68k/target_signal.h linux-user/microblaze/target_signal.h linux-user/mips64/target_signal.h linux-user/mips/target_signal.h linux-user/mips/target_syscall.h linux-user/mips/termbits.h linux-user/ppc/target_signal.h linux-user/sh4/target_signal.h linux-user/sh4/termbits.h linux-user/sparc64/target_syscall.h linux-user/sparc/target_signal.h linux-user/x86_64/target_signal.h linux-user/x86_64/termbits.h pc-bios/optionrom/optionrom.h slirp/mbuf.h slirp/misc.h slirp/sbuf.h slirp/tcp.h slirp/tcp_timer.h slirp/tcp_var.h target/i386/svm.h target/sparc/asi.h target/xtensa/core-dc232b/xtensa-modules.inc.c target/xtensa/core-dc233c/xtensa-modules.inc.c target/xtensa/core-de212/core-isa.h target/xtensa/core-de212/xtensa-modules.inc.c target/xtensa/core-fsf/xtensa-modules.inc.c target/xtensa/core-sample_controller/core-isa.h target/xtensa/core-sample_controller/xtensa-modules.inc.c target/xtensa/core-test_kc705_be/core-isa.h target/xtensa/core-test_kc705_be/xtensa-modules.inc.c tests/tcg/cris/check_abs.c tests/tcg/cris/check_addc.c tests/tcg/cris/check_addcm.c tests/tcg/cris/check_addoq.c tests/tcg/cris/check_bound.c tests/tcg/cris/check_ftag.c tests/tcg/cris/check_int64.c tests/tcg/cris/check_lz.c tests/tcg/cris/check_openpf5.c tests/tcg/cris/check_sigalrm.c tests/tcg/cris/crisutils.h tests/tcg/cris/sys.c tests/tcg/i386/test-i386-ssse3.c ui/vgafont.h Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20181213223737.11793-3-pbonzini@redhat.com> Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Acked-by: Eric Blake <eblake@redhat.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-01-11remove space-tab sequencesPaolo Bonzini
There are not many, and they are all simple mistakes that ended up being committed. Remove them. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20181213223737.11793-2-pbonzini@redhat.com> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-02bsd-user: Use the IEC binary prefix definitionsPhilippe Mathieu-Daudé
It eases code review, unit is explicit. Patch generated using: $ git grep -n '[<>][<>]= ?[1-5]0' and modified manually. Suggested-by: Eric Blake <eblake@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20180625124238.25339-47-f4bug@amsat.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01target: Do not include "exec/exec-all.h" if it is not necessaryPhilippe Mathieu-Daudé
Code change produced with: $ git grep '#include "exec/exec-all.h"' | \ cut -d: -f-1 | \ xargs egrep -L "(cpu_address_space_init|cpu_loop_|tlb_|tb_|GETPC|singlestep|TranslationBlock)" | \ xargs sed -i.bak '/#include "exec\/exec-all.h"/d' Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20180528232719.4721-10-f4bug@amsat.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01bsd-user: include "exec/exec-all.h" which provides mmap_lock/unlock"Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-05-25linux-user: update comments to point to tcg_exec_init()Igor Mammedov
cpu_init() was replaced by cpu_create() since 2.12 but comments weren't updated. So update stale comments to point that page sizes arei actually initialized by tcg_exec_init(). Also move another qemu_host_page_size related comment before tcg_exec_init() where it belongs. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <1526557877-293151-1-git-send-email-imammedo@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2018-03-19Use cpu_create(type) instead of cpu_init(cpu_model)Igor Mammedov
With all targets defining CPU_RESOLVING_TYPE, refactor cpu_parse_cpu_model(type, cpu_model) to parse_cpu_model(cpu_model) so that callers won't have to know internal resolving cpu type. Place it in exec.c so it could be called from both target independed vl.c and *-user/main.c. That allows us to stop abusing cpu type from MachineClass::default_cpu_type as resolver class in vl.c which were confusing part of cpu_parse_cpu_model(). Also with new parse_cpu_model(), the last users of cpu_init() in null-machine.c and bsd/linux-user targets could be switched to cpu_create() API and cpu_init() API will be removed by follow up patch. With no longer users left remove MachineState::cpu_model field, new code should use MachineState::cpu_type instead and leave cpu_model parsing to generic code in vl.c. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <1518000027-274608-5-git-send-email-imammedo@redhat.com> [ehabkost: Fix bsd-user build error] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-03-12Polish the version strings containing the package versionThomas Huth
Since commit 67a1de0d195a there is no space anymore between the version number and the parentheses when running configure with --with-pkgversion=foo : $ qemu-system-s390x --version QEMU emulator version 2.11.50(foo) But the space is included when building without that option when building from a git checkout: $ qemu-system-s390x --version QEMU emulator version 2.11.50 (v2.11.0-1494-gbec9c64-dirty) The same confusion exists with the "query-version" QMP command. Let's fix this by introducing a proper QEMU_FULL_VERSION definition that includes the space and parentheses, while the QEMU_PKGVERSION should just cleanly contain the package version string itself. Note that this also changes the behavior of the "query-version" QMP command (the space and parentheses are not included there anymore), but that's supposed to be OK since the strings there are not meant to be parsed by other tools. Fixes: 67a1de0d195a6185c39b436159c9ffc7720bf979 Buglink: https://bugs.launchpad.net/qemu/+bug/1673373 Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1518692807-25859-1-git-send-email-thuth@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-12-18misc: remove headers implicitly includedPhilippe Mathieu-Daudé
applied using ./scripts/clean-includes Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Ben Warren <ben@skyportsystems.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-10-24tcg: introduce regions to split code_gen_bufferEmilio G. Cota
This is groundwork for supporting multiple TCG contexts. The naive solution here is to split code_gen_buffer statically among the TCG threads; this however results in poor utilization if translation needs are different across TCG threads. What we do here is to add an extra layer of indirection, assigning regions that act just like pages do in virtual memory allocation. (BTW if you are wondering about the chosen naming, I did not want to use blocks or pages because those are already heavily used in QEMU). We use a global lock to serialize allocations as well as statistics reporting (we now export the size of the used code_gen_buffer with tcg_code_size()). Note that for the allocator we could just use a counter and atomic_inc; however, that would complicate the gathering of tcg_code_size()-like stats. So given that the region operations are not a fast path, a lock seems the most reasonable choice. The effectiveness of this approach is clear after seeing some numbers. I used the bootup+shutdown of debian-arm with '-tb-size 80' as a benchmark. Note that I'm evaluating this after enabling per-thread TCG (which is done by a subsequent commit). * -smp 1, 1 region (entire buffer): qemu: flush code_size=83885014 nb_tbs=154739 avg_tb_size=357 qemu: flush code_size=83884902 nb_tbs=153136 avg_tb_size=363 qemu: flush code_size=83885014 nb_tbs=152777 avg_tb_size=364 qemu: flush code_size=83884950 nb_tbs=150057 avg_tb_size=373 qemu: flush code_size=83884998 nb_tbs=150234 avg_tb_size=373 qemu: flush code_size=83885014 nb_tbs=154009 avg_tb_size=360 qemu: flush code_size=83885014 nb_tbs=151007 avg_tb_size=370 qemu: flush code_size=83885014 nb_tbs=151816 avg_tb_size=367 That is, 8 flushes. * -smp 8, 32 regions (80/32 MB per region) [i.e. this patch]: qemu: flush code_size=76328008 nb_tbs=141040 avg_tb_size=356 qemu: flush code_size=75366534 nb_tbs=138000 avg_tb_size=361 qemu: flush code_size=76864546 nb_tbs=140653 avg_tb_size=361 qemu: flush code_size=76309084 nb_tbs=135945 avg_tb_size=375 qemu: flush code_size=74581856 nb_tbs=132909 avg_tb_size=375 qemu: flush code_size=73927256 nb_tbs=135616 avg_tb_size=360 qemu: flush code_size=78629426 nb_tbs=142896 avg_tb_size=365 qemu: flush code_size=76667052 nb_tbs=138508 avg_tb_size=368 Again, 8 flushes. Note how buffer utilization is not 100%, but it is close. Smaller region sizes would yield higher utilization, but we want region allocation to be rare (it acquires a lock), so we do not want to go too small. * -smp 8, static partitioning of 8 regions (10 MB per region): qemu: flush code_size=21936504 nb_tbs=40570 avg_tb_size=354 qemu: flush code_size=11472174 nb_tbs=20633 avg_tb_size=370 qemu: flush code_size=11603976 nb_tbs=21059 avg_tb_size=365 qemu: flush code_size=23254872 nb_tbs=41243 avg_tb_size=377 qemu: flush code_size=28289496 nb_tbs=52057 avg_tb_size=358 qemu: flush code_size=43605160 nb_tbs=78896 avg_tb_size=367 qemu: flush code_size=45166552 nb_tbs=82158 avg_tb_size=364 qemu: flush code_size=63289640 nb_tbs=116494 avg_tb_size=358 qemu: flush code_size=51389960 nb_tbs=93937 avg_tb_size=362 qemu: flush code_size=59665928 nb_tbs=107063 avg_tb_size=372 qemu: flush code_size=38380824 nb_tbs=68597 avg_tb_size=374 qemu: flush code_size=44884568 nb_tbs=79901 avg_tb_size=376 qemu: flush code_size=50782632 nb_tbs=90681 avg_tb_size=374 qemu: flush code_size=39848888 nb_tbs=71433 avg_tb_size=372 qemu: flush code_size=64708840 nb_tbs=119052 avg_tb_size=359 qemu: flush code_size=49830008 nb_tbs=90992 avg_tb_size=362 qemu: flush code_size=68372408 nb_tbs=123442 avg_tb_size=368 qemu: flush code_size=33555560 nb_tbs=59514 avg_tb_size=378 qemu: flush code_size=44748344 nb_tbs=80974 avg_tb_size=367 qemu: flush code_size=37104248 nb_tbs=67609 avg_tb_size=364 That is, 20 flushes. Note how a static partitioning approach uses the code buffer poorly, leading to many unnecessary flushes. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-10-24tcg: define tcg_init_ctx and make tcg_ctx a pointerEmilio G. Cota
Groundwork for supporting multiple TCG contexts. The core of this patch is this change to tcg/tcg.h: > -extern TCGContext tcg_ctx; > +extern TCGContext tcg_init_ctx; > +extern TCGContext *tcg_ctx; Note that for now we set *tcg_ctx to whatever TCGContext is passed to tcg_context_init -- in this case &tcg_init_ctx. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2017-09-19cpu: make cpu_generic_init() abort QEMU on errorIgor Mammedov
Almost every user of cpu_generic_init() checks for returned NULL and then reports failure in a custom way and aborts process. Some users assume that call can't fail and don't check for failure, though they should have checked for it. In either cases cpu_generic_init() failure is fatal, so instead of checking for failure and reporting it various ways, make cpu_generic_init() report errors in consistent way and terminate QEMU on failure. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <1505318697-77161-3-git-send-email-imammedo@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-08-08maint: Include bug-reporting info in --help outputEric Blake
These days, many programs are including a bug-reporting address, or better yet, a link to the project web site, at the tail of their --help output. However, we were not very consistent at doing so: only qemu-nbd and qemu-qa mentioned anything, with the latter pointing to an individual person instead of the project. Add a new #define that sets up a uniform string, mentioning both bug reporting instructions and overall project details, and which a downstream vendor could tweak if they want bugs to go to a downstream database. Then use it in all of our binaries which have --help output. The canned text intentionally references http:// instead of https:// because our https website currently causes certificate errors in some browsers. That can be tweaked later once we have resolved the web site issued. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20170803163353.19558-5-eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-21bsd-user/main.c: Fix unused variable warningPeter Maydell
On OpenBSD the compiler warns: bsd-user/main.c:622:21: warning: variable 'sig' set but not used [-Wunused-but-set-variable] This is because a lot of the signal delivery code is #if-0'd out as unused. Reshuffle #ifdefs a bit to silence the warning. (We make the minimum change here rather than removing all the bsd-user patchset which should make this all work correctly and there's no point giving them an awkward rebase task.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1500395194-21455-5-git-send-email-peter.maydell@linaro.org
2017-07-21bsd-user/bsdload.c: Remove write-only id_change variablePeter Maydell
On OpenBSD the compiler complains: bsd-user/bsdload.c:54:17: warning: variable 'id_change' set but not used [-Wunused-but-set-variable] This is dead code that was originally copied from linux-user. We fixed this in linux-user in commit 331c23b5ca44293d1 in 2011; delete the useless code from bsd-user too. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-id: 1500395194-21455-4-git-send-email-peter.maydell@linaro.org
2017-07-21bsd-user/elfload.c: Fix set-but-not-used warningsPeter Maydell
Fix various warnings about set-but-not-used variables on OpenBSD: bsd-user/elfload.c:1158:15: warning: variable 'mapped_addr' set but not used [-Wunused-but-set-variable] bsd-user/elfload.c:1165:9: warning: variable 'status' set but not used [-Wunused-but-set-variable] bsd-user/elfload.c:1168:15: warning: variable 'elf_stack' set but not used [-Wunused-but-set-variable] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1500395194-21455-3-git-send-email-peter.maydell@linaro.org
2017-07-21bsd-user/mmap.c: Move __thread attribute to right placePeter Maydell
Avoid a compiler warning on OpenBSD: bsd-user/mmap.c:28:1: warning: '__thread' is not at beginning of declaration [-Wold-style-declaration] by moving the __thread attribute to its proper place. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1500395194-21455-2-git-send-email-peter.maydell@linaro.org
2017-07-14qom/cpu: remove host_tid fieldAlex Bennée
This was only used by the gdbstub and even then was only being set for subsequent threads. Rather the continue duplicating the number just make the gdbstub get the information from TaskState structure. Now the tid is correctly reported for all threads the bug I was seeing with "vCont;C04:0;c" packets is fixed as the correct tid is reported to gdb. I moved cpu_gdb_index into the gdbstub to facilitate easy access to the TaskState which is used elsewhere in gdbstub. To prevent BSD failing to build I've included ts_tid into its TaskStruct but not populated it - which was the same state as the old cpu->host_tid. I'll leave it up to the BSD maintainers to actually populate this properly if they want a working gdbstub with user-threads. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20170712105216.747-4-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-04tcg: move tb_lock out of translate-all.hPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-05-07util: Use g_malloc/g_free in envlist.cSaurav Sachidanand
Change malloc/strdup/free to g_malloc/g_strdup/g_free in util/envlist.c. Remove NULL checks for pointers returned from g_malloc and g_strdup as they exit in case of failure. Also, update calls to envlist_create to reflect this. Free array and array contents returned by envlist_to_environ using g_free in bsd-user/main.c and linux-user/main.c. Update comments to reflect change in semantics. Signed-off-by: Saurav Sachidanand <sauravsachidanand@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-03-28bsd-user: align use of mmap_lock to that of linux-userAlex Bennée
The introduction of stricter mmap_lock checking in translate-all broke the BSD user build. The working mmap_lock functions were hidden behind CONFIG_USE_NPTL which is never defined. This patch brings them inline with linux-user. Despite the disapearence of the comment "We aren't threadsafe to start with..." this doesn't make bsd-user so. It will still need the rest of the fixes that have been done in linux-user ported over. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-20configure: remove CygwinPaolo Bonzini
The Cygwin target is really compiling for native Win32 with -mno-cygwin. Except, GCC 4.7.0 has finally removed the long deprecated -mno-cygwin option, and that happened about five years ago. Let it rest in peace. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Message-id: 20170317160811.28370-1-pbonzini@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-10-31translate-all: add DEBUG_LOCKING assertsAlex Bennée
This adds asserts to check the locking on the various translation engines structures. There are two sets of structures that are protected by locks. The first the l1map and PageDesc structures used to track which translation blocks are associated with which physical addresses. In user-mode this is covered by the mmap_lock. The second case are TB context related structures which are protected by tb_lock which is also user-mode only. Currently the asserts do nothing in SoftMMU mode but this will change for MTTCG. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Message-Id: <20161027151030.20863-4-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-24Put the copyright information on a separate lineThomas Huth
The output string QEMU with "--version" is very long, it does not fit into a normal line of a terminal window anymore. By putting the copyright information on a separate line instead, the output looks much nicer. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1475661284-30153-1-git-send-email-thuth@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-12trace: provide mechanism for registering trace eventsDaniel P. Berrange
Remove the notion of there being a single global array of trace events, by introducing a method for registering groups of events. The module_call_init() needs to be invoked at the start of any program that wants to make use of the trace support. Currently this covers system emulators qemu-nbd, qemu-img and qemu-io. [Squashed the following fix from Daniel P. Berrange <berrange@redhat.com>: linux-user/bsd-user: initialize trace events subsystem The bsd-user/linux-user programs make use of the CPU emulation code and this now requires that the trace events subsystem is enabled, otherwise it'll crash trying to allocate an empty trace events bitmap for the CPU object. --Stefan] 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: 1475588159-30598-14-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-10-07bsd-user: fix FreeBSD build after d148d90eEd Maste
Signed-off-by: Ed Maste <emaste@freebsd.org> Message-id: 1475611369-74971-1-git-send-email-emaste@freebsd.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-09-29Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' ↵Peter Maydell
into staging # gpg: Signature made Wed 28 Sep 2016 22:30:45 BST # 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: Document the execution mode of guest events trace: Add event "guest_cpu_reset" trace: Add event "guest_cpu_enter" trace: Properly initialize dynamic event states in hot-plugged vCPUs trace: move hw/virtio/virtio-balloon.c trace points into correct file trace: move hw/mem/pc-dimm.c trace points into correct file trace: move util/qemu-coroutine*.c trace points into correct file trace: move util/buffer.c trace points into correct file Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-09-28trace: Properly initialize dynamic event states in hot-plugged vCPUsLluís Vilanova
Every time a vCPU is hot-plugged, it will "inherit" its tracing state from the global state array. That is, if *any* existing vCPU has an event enabled, new vCPUs will have too. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 147428970768.15111.7664565956870423529.stgit@fimbulvetr.bsc.es Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-09-27cpus-common: move exclusive work infrastructure from linux-userPaolo Bonzini
This will serve as the base for async_safe_run_on_cpu. Because start_exclusive uses CPU_FOREACH, merge exclusive_lock with qemu_cpu_list_lock: together with a call to exclusive_idle (via cpu_exec_start/end) in cpu_list_add, this protects exclusive work against concurrent CPU addition and removal. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-27cpus-common: move CPU work item management to common codeSergey Fedorov
Make CPU work core functions common between system and user-mode emulation. User-mode does not use run_on_cpu, so do not implement it. Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com> Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <1470158864-17651-10-git-send-email-alex.bennee@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-27cpus-common: move CPU list management to common codePaolo Bonzini
Add a mutex for the CPU list to system emulation, as it will be used to manage safe work. Abstract manipulation of the CPU list in new functions cpu_list_add and cpu_list_remove. Reviewed-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-08-24Fix bsd-user build after d915b7bbEd Maste
Must include "qemu-version.h" for the QEMU_PKGVERSION definition. Signed-off-by: Ed Maste <emaste@freebsd.org> Message-id: 1471877833-52343-1-git-send-email-emaste@freebsd.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-08-11Update ancient copyright string in -version outputPeter Maydell
Currently the -version command line argument prints a string ending with "Copyright (c) 2003-2008 Fabrice Bellard". This is now some eight years out of date; abstract it out of the several places that print the string and update it to: Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers to reflect the work by all the QEMU Project contributors over the last decade. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1470309276-5012-1-git-send-email-peter.maydell@linaro.org
2016-08-01Fix bsd-user build errors after 8642c1b81e0418df066a7960a7426d85a923a253Sean Bruno
LINK sparc-bsd-user/qemu-sparc bsd-user/main.o: In function `cpu_loop': /home/sbruno/bsd/qemu/bsd-user/main.c:515: undefined reference to `cpu_sparc_exec' c++: error: linker command failed with exit code 1 (use -v to see invocation) gmake[1]: *** [Makefile:197: qemu-sparc] Error 1 gmake: *** [Makefile:204: subdir-sparc-bsd-user] Error 2 LINK i386-bsd-user/qemu-i386 bsd-user/main.o: In function `cpu_loop': /home/sbruno/bsd/qemu/bsd-user/main.c:174: undefined reference to `cpu_x86_exec' c++: error: linker command failed with exit code 1 (use -v to see invocation) gmake[1]: *** [Makefile:197: qemu-i386] Error 1 gmake: *** [Makefile:204: subdir-i386-bsd-user] Error 2 Signed-off-by: Sean Bruno <sbruno@freebsd.org> Message-id: 20160729160235.64525-1-sbruno@freebsd.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>