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2015-07-09cpu-exec: Purge all uses of ENV_GET_CPU()Peter Crosthwaite
Remove un-needed usages of ENV_GET_CPU() by converting the APIs to use CPUState pointers and retrieving the env_ptr as minimally needed. Scripted conversion for target-* change: for I in target-*/cpu.h; do sed -i \ 's/\(^int cpu_[^_]*_exec(\)[^ ][^ ]* \*s);$/\1CPUState *cpu);/' \ $I; done Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2015-06-26include/exec: Move tb hash functions outPeter Crosthwaite
This is one of very few things in exec-all with a genuine CPU architecture dependency. Move these hashing helpers to a new header to trim exec-all.h down to a near architecture-agnostic header. The defs are only used by cpu-exec and translate-all which are both arch-obj's so the new tb-hash.h has no core code usage. Reviewed-by: Richard Henderson <rth@redhat.com> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Message-Id: <9d048b96f7cfa64a4d9c0b88e0dd2877fac51d41.1433052532.git.crosthwaite.peter@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-24Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
- vhost-scsi: add bootindex property - RCU: fix MemoryRegion lifetime issues in PCI; document the rules; convert of AddressSpaceDispatch and RAMList - KVM: add kvm_exit reasons for aarch64 # gpg: Signature made Mon Feb 16 16:32:32 2015 GMT using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: (21 commits) Convert ram_list to RCU exec: convert ram_list to QLIST cosmetic changes preparing for the following patches exec: protect mru_block with RCU rcu: add g_free_rcu rcu: introduce RCU-enabled QLIST exec: RCUify AddressSpaceDispatch exec: make iotlb RCU-friendly exec: introduce cpu_reload_memory_map docs: clarify memory region lifecycle pci: split shpc_cleanup and shpc_free pcie: remove mmconfig memory leak and wrap mmconfig update with transaction memory: keep the owner of the AddressSpace alive until do_address_space_destroy rcu: run RCU callbacks under the BQL rcu: do not let RCU callbacks pile up indefinitely vhost-scsi: set the bootable value of channel/target/lun vhost-scsi: add a property for booting vhost-scsi: expose the TYPE_FW_PATH_PROVIDER interface vhost-scsi: add bootindex property qdev: support to get a device firmware path directly ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-02-16exec: RCUify AddressSpaceDispatchPaolo Bonzini
Note that even after this patch, most callers of address_space_* functions must still be under the big QEMU lock, otherwise the memory region returned by address_space_translate can disappear as soon as address_space_translate returns. This will be fixed in the next part of this series. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-16exec: make iotlb RCU-friendlyPaolo Bonzini
After the previous patch, TLBs will be flushed on every change to the memory mapping. This patch augments that with synchronization of the MemoryRegionSections referred to in the iotlb array. With this change, it is guaranteed that iotlb_to_region will access the correct memory map, even once the TLB will be accessed outside the BQL. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-16exec: introduce cpu_reload_memory_mapPaolo Bonzini
This for now is a simple TLB flush. This can change later for two reasons: 1) an AddressSpaceDispatch will be cached in the CPUState object 2) it will not be possible to do tlb_flush once the TCG-generated code runs outside the BQL. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-10cpu-exec: simplify icount codePaolo Bonzini
Use MIN instead of an "if" statement. Move "tb" assignment where the value is actually used. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-02-10cpu-exec: drop dead assignmentPaolo Bonzini
All uses of TB inside cpu_exec are dominated by "tb = tb_find_fast(env)", and there are no uses after the switch statement. So the assignment is dead, as reported by Coverity. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-02-02cpu-exec: simplify init_delay_paramsPaolo Bonzini
With the introduction of QEMU_CLOCK_VIRTUAL_RT, the computation of sc->diff_clk can be simplified nicely: qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + cpu_get_clock_offset() = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - cpu_get_clock_offset()) = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + timers_state.cpu_clock_offset) = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) Cc: Sebastian Tanase <sebastian.tanase@openwide.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-02-02cpu-exec: simplify align_clocksPaolo Bonzini
sc->diff_clk is already equal to sleep_delay (split in a second and a nanosecond part). If you subtract sleep_delay - rem_delay, the result is exactly rem_delay. Cc: Sebastian Tanase <sebastian.tanase@openwide.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15cpu-exec: invalidate nocache translation if they are interruptedPavel Dovgalyuk
In this case, QEMU might longjmp out of cpu-exec.c and miss the final cleanup in cpu_exec_nocache. Do this manually through a new compile flag. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15icount: set can_do_io outside TB executionPavel Dovgalyuk
This patch sets can_do_io function to allow reading icount within cpu-exec, but outside TB execution. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15cpu-exec: reset exception_index correctlyPavel Dovgalyuk
Exception index is reset at every entry at every entry into cpu_exec() function. This may cause missing the exceptions while replaying them. This patch moves exception_index reset to the locations where they are processed. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15cpu-exec: fix cpu_exec_nocachePavel Dovgalyuk
In icount mode cpu_exec_nocache function is used to execute part of the existing TB. At the end of cpu_exec_nocache newly created TB is deleted. Sometimes io_read function needs to recompile current TB and restart TB lookup and execution. After that tb_find_fast function finds old (bigger) TB again. This TB cannot be executed (because icount is not big enough) and cpu_exec_nocache is called again. Such a loop continues over and over. This patch deletes old TB and avoids finding it in the TB cache. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-25cpu-exec: Do CPU_INTERRUPT_HALT unconditionallyRichard Henderson
The signal is currently checked by 10 targets, but only actually raised by Sparc and ARM. For the sake of one test-and-branch, we can handle this generic bit generically. Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-24-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-i386: Use cpu_exec_interrupt qom hookRichard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-23-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-ppc: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: qemu-ppc@nongnu.org Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-22-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-lm32: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Michael Walle <michael@walle.cc> Signed-off-by: Richard Henderson <rth@twiddle.net> Acked-by: Michael Walle <michael@walle.cc> Message-id: 1410626734-3804-21-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-microblaze: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-20-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-mips: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Tested-by: Leon Alrae <leon.alrae@imgtec.com> Message-id: 1410626734-3804-19-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-tricore: Remove the dummy interrupt boilerplateRichard Henderson
It can go back in when it actually does something. Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Message-id: 1410626734-3804-18-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-openrisc: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Jia Liu <proljc@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Tested-by: Jia Liu <proljc@gmail.com> Message-id: 1410626734-3804-17-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-sparc: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Blue Swirl <blauwirbel@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-16-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-arm: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-15-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-unicore32: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-14-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-sh4: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-13-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-alpha: Use cpu_exec_interrupt qom hookRichard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Message-id: 1410626734-3804-12-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-cris: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 1410626734-3804-11-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-m68k: Use cpu_exec_interrupt qom hookRichard Henderson
Since do_interrupt_m68k_hardirq is no longer used outside op_helper.c, make it static. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-10-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-s390x: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Alexander Graf <agraf@suse.de> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-9-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-xtensa: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Message-id: 1410626734-3804-8-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25qom: Add cpu_exec_interrupt hookRichard Henderson
Continuing the removal of ifdefs from cpu_exec. Cc: Andreas Färber <afaerber@suse.de> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-7-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-ppc: Use cpu_exec_enter qom hookRichard Henderson
Cc: qemu-ppc@nongnu.org Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-6-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-m68k: Use cpu_exec_enter/exit qom hooksRichard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-5-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25target-i386: Use cpu_exec_enter/exit qom hooksRichard Henderson
Note that the code that was within the "exit" ifdef block was identical to the cpu_compute_eflags inline, so make that simplification at the same time. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-4-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25cpu-exec: Remove do-nothing ifdef chainsRichard Henderson
Around the cpu_exec_enter/exit hooks contain many empty ifdef blocks. Delete all of these to highlight those targets for which we actually need to do work. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-3-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-25qom: Add cpu_exec_enter and cpu_exec_exit hooksRichard Henderson
In preparation for removing a bunch of ifdefs from cpu_exec. Cc: Andreas Färber <afaerber@suse.de> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-2-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-12cpu-exec: Make debug_excp_handler a QOM CPU methodPeter Maydell
Make the debug_excp_handler target specific hook into a QOM CPU method. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-12cpu-exec.c: Allow disabling of IRQs on ARM Cortex-M CPUsDavid Hoover
Correct an error in the logic for deciding whether we can take an IRQ interrupt which meant that on M profile cores it was never possible to disable them. The design here is still bogus in that M profile doesn't have separate "IRQ" and "FIQ", which are an A/R profile concept; we should ideally implement the proper priority based scheme. Signed-off-by: David Hoover <spm@boiteauxlettres.sent.at> [PMM: Wrote a proper commit message] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-09-01target-tricore: Add target stubs and qom-cpuBastian Koppelmann
Add TriCore target stubs, and QOM cpu, and Maintainer Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Message-id: 1409572800-4116-2-git-send-email-kbastian@mail.uni-paderborn.de Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-08-12trace: add some tcg tracing supportAlex Bennée
This adds a couple of tcg specific trace-events which are useful for tracing execution though tcg generated blocks. It's been tested with lttng user space tracing but is generic enough for all systems. The tcg events are: * translate_block - when a subject block is translated * exec_tb - when a translated block is entered * exec_tb_exit - when we exit the translated code * exec_tb_nocache - special case translations Of course we can only trace the entrance to the first block of a chain as each block will jump directly to the next when it can. See the -d nochain patch to allow more complete tracing at the expense of performance. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-07monitor: Add drift info to 'info jit'Sebastian Tanase
Show in 'info jit' the current delay between the host clock and the guest clock. In addition, print the maximum advance and delay of the guest compared to the host. Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr> Tested-by: Camille Bégué <camille.begue@openwide.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-08-06cpu-exec: Print to console if the guest is lateSebastian Tanase
If the align option is enabled, we print to the user whenever the guest clock is behind the host clock in order for he/she to have a hint about the actual performance. The maximum print interval is 2s and we limit the number of messages to 100. If desired, this can be changed in cpu-exec.c Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr> Tested-by: Camille Bégué <camille.begue@openwide.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-08-06cpu-exec: Add sleeping algorithmSebastian Tanase
The goal is to sleep qemu whenever the guest clock is in advance compared to the host clock (we use the monotonic clocks). The amount of time to sleep is calculated in the execution loop in cpu_exec. At first, we tried to approximate at each for loop the real time elapsed while searching for a TB (generating or retrieving from cache) and executing it. We would then approximate the virtual time corresponding to the number of virtual instructions executed. The difference between these 2 values would allow us to know if the guest is in advance or delayed. However, the function used for measuring the real time (qemu_clock_get_ns(QEMU_CLOCK_REALTIME)) proved to be very expensive. We had an added overhead of 13% of the total run time. Therefore, we modified the algorithm and only take into account the difference between the 2 clocks at the begining of the cpu_exec function. During the for loop we try to reduce the advance of the guest only by computing the virtual time elapsed and sleeping if necessary. The overhead is thus reduced to 3%. Even though this method still has a noticeable overhead, it no longer is a bottleneck in trying to achieve a better guest frequency for which the guest clock is faster than the host one. As for the the alignement of the 2 clocks, with the first algorithm the guest clock was oscillating between -1 and 1ms compared to the host clock. Using the second algorithm we notice that the guest is 5ms behind the host, which is still acceptable for our use case. The tests where conducted using fio and stress. The host machine in an i5 CPU at 3.10GHz running Debian Jessie (kernel 3.12). The guest machine is an arm versatile-pb built with buildroot. Currently, on our test machine, the lowest icount we can achieve that is suitable for aligning the 2 clocks is 6. However, we observe that the IO tests (using fio) are slower than the cpu tests (using stress). Signed-off-by: Sebastian Tanase <sebastian.tanase@openwide.fr> Tested-by: Camille Bégué <camille.begue@openwide.fr> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-13cpu: make CPU_INTERRUPT_RESET available on all targetsPaolo Bonzini
On the x86, some devices need access to the CPU reset pin (INIT#). Provide a generic service to do this, using one of the internal cpu_interrupt targets. Generalize the PPC-specific code for CPU_INTERRUPT_RESET to other targets. Since PPC does not support migration across QEMU versions (its machine types are not versioned yet), I picked the value that is used on x86, CPU_INTERRUPT_TGT_INT_1. Consequently, TGT_INT_2 and TGT_INT_3 are shifted down by one while keeping their value. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-04-04cpu-exec: Unlock tb_lock if we longjmp out of code generationPeter Maydell
If the guest attempts to execute from unreadable memory, this will cause us to longjmp back to the main loop from inside the target frontend decoder. For linux-user mode, this means we will still hold the tb_ctx.tb_lock, and will deadlock when we try to start executing code again. Unlock the lock in the return-from-longjmp code path to avoid this. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Andrei Warkentin <andrey.warkentin@gmail.com> Reviewed-by: Richard Henderson <rth@twiddle.net>
2014-03-13cpu-exec: Change cpu_resume_from_signal() argument to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13translate-all: Change tb_gen_code() argument to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu-exec: Change cpu_loop_exit() argument to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Move watchpoint fields from CPU_COMMON to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
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