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2011-02-20serial: make optionalBlue Swirl1-1/+4
Ignore failure with serial device creation. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-20serial: refactor device creationBlue Swirl2-13/+13
Turn serial_init into an inline function. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-20ne2000_isa: make optionalBlue Swirl1-2/+7
Ignore failure with ne2000_isa device creation. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-20ne2000_isa: refactor device creationBlue Swirl2-14/+11
Turn isa_ne2000_init into an inline function. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-20parallel: make optionalBlue Swirl1-1/+4
Ignore failure with parallel device creation. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-20parallel: refactor device creationBlue Swirl2-19/+19
Turn parallel_init into an inline function. Don't expose ParallelState. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-17Fix vmport segfault (v2)Marcelo Tosatti1-5/+6
Fix regression caused by qdev conversion. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-16Merge remote branch 'kwolf/for-anthony' into stagingAnthony Liguori10-19/+94
2011-02-16Merge remote branch 'qemu-kvm/uq/master' into stagingAnthony Liguori34-485/+921
2011-02-16Handle icount for powerpc tbl/tbu/decr load and store.Tristan Gingold1-0/+42
Handle option '-icount X' on powerpc targets. Signed-off-by: Tristan Gingold <gingold@adacore.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
2011-02-16Merge mainstone.h header into mainstone.cDmitry Eremin-Solenikov2-36/+22
Now the only user of mainstone.h is mainstone.c file. Merge header into board file. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
2011-02-16mainstone: convert FPGA emulation code to use QDev/SysBusDmitry Eremin-Solenikov3-55/+55
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
2011-02-16mainstone: correct and simplify irq handlingDmitry Eremin-Solenikov1-19/+10
Simplify IRQ handling to stop setting an input irq pin. As a win, also get correct IRQ status after save/load cycle. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
2011-02-14Fix build from previous commitAnthony Liguori1-1/+1
I unfortunately got on an unnamed branch and pushed the wrong bits Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-14PATCH] slirp: fix buffer overrunBruce Rogers1-2/+2
Since the addition of the slirp member to struct mbuf, the value of SLIRP_MSIZE and the initialization of m_size have not been correct, resulting in overrunning the end of the malloc'd buffer in some cases. Signed-off-by: Bruce Rogers <brogers@novell.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-14correctly check ppr priority during interrupt injection]Gleb Natapov1-12/+30
TPR blocks all interrupts in a priority class, so simple "less or equal" check is not enough. Signed-off-by: Gleb Natapov <gleb@redhat.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-14io-thread: make sure to initialize qemu_work_cond and qemu_cpu_condAnthony Liguori1-1/+3
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-02-14kvm: x86: Introduce kvmclock device to save/restore its stateJan Kiszka4-9/+166
If kvmclock is used, which implies the kernel supports it, register a kvmclock device with the sysbus. Its main purpose is to save and restore the kernel state on migration, but this will also allow to visualize it one day. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Glauber Costa <glommer@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Make kvm_state globally availableJan Kiszka2-1/+2
KVM-assisted devices need access to it but we have no clean channel to distribute a reference. As a workaround until there is a better solution, export kvm_state for global use, though use should remain restricted to the mentioned scenario. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14cirrus: Remove obsolete kvm.h includeJan Kiszka1-1/+0
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Introduce log_start/log_stop in CPUPhysMemoryClientAnthony PERARD8-30/+64
In order to use log_start/log_stop with Xen as well in the vga code, this two operations have been put in CPUPhysMemoryClient. The two new functions cpu_physical_log_start,cpu_physical_log_stop are used in hw/vga.c and replace the kvm_log_start/stop. With this, vga does no longer depends on kvm header. [ Jan: rebasing and style fixlets ] Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Remove unneeded memory slot reservationJan Kiszka1-4/+0
The number of slots and the location of private ones changed several times in KVM's early days. However, it's stable since 2.6.29 (our required baseline), and slots 8..11 are no longer reserved since then. So remove this unneeded restriction. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: x86: Catch and report failing IRQ and NMI injectionsJan Kiszka1-3/+13
We do not need to abort, but the user should be notified that weird things go on. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Drop return values from kvm_arch_pre/post_runJan Kiszka4-17/+8
We do not check them, and the only arch with non-empty implementations always returns 0 (this is also true for qemu-kvm). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: x86: Prepare VCPU loop for in-kernel irqchipJan Kiszka1-31/+38
Effectively no functional change yet as kvm_irqchip_in_kernel still only returns 0, but this patch will allow qemu-kvm to adopt the VCPU loop of upsteam KVM. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Separate TCG from KVM cpu executionJan Kiszka4-31/+23
Mixing up TCG bits with KVM already led to problems around eflags emulation on x86. Moreover, quite some code that TCG requires on cpu enty/exit is useless for KVM. So dispatch between tcg_cpu_exec and kvm_cpu_exec as early as possible. The core logic of cpu_halted from cpu_exec is added to kvm_arch_process_irqchip_events. Moving away from cpu_exec makes exception_index meaningless for KVM, we can simply pass the exit reason directly (only "EXCP_DEBUG vs. rest" is relevant). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Move debug exception handling out of cpu_execJan Kiszka3-30/+31
To prepare splitting up KVM and TCG CPU entry/exit, move the debug exception into cpus.c and invoke cpu_handle_debug_exception on return from qemu_cpu_exec. This also allows to clean up the debug request signaling: We can assign the job of informing main-loop to qemu_system_debug_request and stop the calling cpu directly in cpu_handle_debug_exception. That means a debug stop will now only be signaled via debug_requested and not additionally via vmstop_requested. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Refactor debug and vmstop request interfaceJan Kiszka4-14/+19
Instead of fiddling with debug_requested and vmstop_requested directly, introduce qemu_system_debug_request and turn qemu_system_vmstop_request into a public interface. This aligns those services with exiting ones in vl.c. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Improve vm_stop reason declarationsJan Kiszka12-22/+33
Define and use dedicated constants for vm_stop reasons, they actually have nothing to do with the EXCP_* defines used so far. At this chance, specify more detailed reasons so that VM state change handlers can evaluate them. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Fix a few coding style violations in cpus.cJan Kiszka1-27/+44
No functional changes. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Refactor cpu_has_work/any_cpu_has_work in cpus.cJan Kiszka1-20/+23
Avoid duplicate use of the function name cpu_has_work, it's confusing, also their scope. Refactor cpu_has_work to cpu_thread_is_idle and do the same with any_cpu_has_work. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Refactor kvm&tcg function names in cpus.cJan Kiszka1-8/+8
Pure interface cosmetics: Ensure that only kvm core services (as declared in kvm.h) start with "kvm_". Prepend "qemu_" to those that violate this rule in cpus.c. Also rename the corresponding tcg functions for the sake of consistency. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: make tsc stable over migration and machine startGlauber Costa2-1/+18
If the machine is stopped, we should not record two different tsc values upon a save operation. The same problem happens with kvmclock. But kvmclock is taking a different diretion, being now seen as a separate device. Since this is unlikely to happen with the tsc, I am taking the approach here of simply registering a handler for state change, and using a per-CPUState variable that prevents double updates for the TSC. Signed-off-by: Glauber Costa <glommer@redhat.com> CC: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Leave kvm_cpu_exec directly after KVM_EXIT_SHUTDOWNJan Kiszka1-1/+0
The reset we issue on KVM_EXIT_SHUTDOWN implies that we should also leave the VCPU loop. As we now check for exit_request which is set by qemu_system_reset_request, this bug is no longer critical. Still it's an unneeded extra turn. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Remove static return code of kvm_handle_ioJan Kiszka1-9/+8
Improve the readability of the exit dispatcher by moving the static return value of kvm_handle_io to its caller. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Unconditionally reenter kernel after IO exitsJan Kiszka2-14/+22
KVM requires to reenter the kernel after IO exits in order to complete instruction emulation. Failing to do so will leave the kernel state inconsistently behind. To ensure that we will get back ASAP, we issue a self-signal that will cause KVM_RUN to return once the pending operations are completed. We can move kvm_arch_process_irqchip_events out of the inner VCPU loop. The only state that mattered at its old place was a pending INIT request. Catch it in kvm_arch_pre_run and also trigger a self-signal to process the request on next kvm_cpu_exec. This patch also fixes the missing exit_request check in kvm_cpu_exec in the CONFIG_IOTHREAD case. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Introduce VCPU self-signaling serviceJan Kiszka2-0/+22
Introduce qemu_cpu_kick_self to send SIG_IPI to the calling VCPU context. First user will be kvm. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Add MCE signal support for !CONFIG_IOTHREADJan Kiszka1-42/+65
Currently, we only configure and process MCE-related SIGBUS events if CONFIG_IOTHREAD is enabled. The groundwork is laid, we just need to factor out the required handler registration and system configuration. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Huang Ying <ying.huang@intel.com> CC: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> CC: Jin Dongming <jin.dongming@np.css.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Fix race between timer signals and vcpu entry under !IOTHREADJan Kiszka2-1/+36
Found by Stefan Hajnoczi: There is a race in kvm_cpu_exec between checking for exit_request on vcpu entry and timer signals arriving before KVM starts to catch them. Plug it by blocking both timer related signals also on !CONFIG_IOTHREAD and process those via signalfd. As this fix depends on real signalfd support (otherwise the timer signals only kick the compat helper thread, and the main thread hangs), we need to detect the invalid constellation and abort configure. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Set up signalfd under !CONFIG_IOTHREADJan Kiszka2-54/+65
Will be required for SIGBUS handling. For obvious reasons, this will remain a nop on Windows hosts. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREADJan Kiszka1-38/+52
Move qemu_kvm_eat_signals around and call it also when the IO-thread is not used. Do not yet process SIGBUS, will be armed in a separate step. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Refactor qemu_kvm_eat_signalsJan Kiszka1-16/+7
We do not use the timeout, so drop its logic. As we always poll our signals, we do not need to drop the global lock. Removing those calls allows some further simplifications. Also fix the error processing of sigpending at this chance. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Set up signal mask also for !CONFIG_IOTHREADJan Kiszka1-2/+27
Block SIG_IPI, unblock it during KVM_RUN, just like in io-thread mode. It's unused so far, but this infrastructure will be required for self-IPIs and to process SIGBUS plus, in KVM mode, SIGIO and SIGALRM. As Windows doesn't support signal services, we need to provide a stub for the init function. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Refactor signal setup functions in cpus.cJan Kiszka1-79/+83
Move {tcg,kvm}_init_ipi and block_io_signals to avoid prototypes, rename the former two to clarify that they deal with more than SIG_IPI. No functional changes - except for the tiny fixup of strerror usage. The forward declaration of sigbus_handler is just temporarily, it will be moved in a succeeding patch. dummy_signal is moved into the !_WIN32 block as we will soon need it also for !CONFIG_IOTHREAD. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Provide sigbus services arch-independentlyJan Kiszka7-10/+46
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'ery from cpus.c. This patch also fixes --disable-kvm build by providing the missing kvm_on_sigbus_vcpu kvm-stub. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Handle kvm_init_vcpu errorsJan Kiszka1-4/+15
Do not ignore errors of kvm_init_vcpu, they are fatal. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fnJan Kiszka1-2/+2
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Report proper error on GET_VCPU_MMAP_SIZE failuresJan Kiszka1-0/+1
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Flatten the main loopJan Kiszka1-15/+15
First of all, vm_can_run is a misnomer, it actually means "no request pending". Moreover, there is no need to check all pending requests twice, the first time via the inner loop check and then again when actually processing the requests. We can simply remove the inner loop and do the checks directly. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Leave inner main_loop faster on pending requestsJan Kiszka1-4/+7
If there is any pending request that requires us to leave the inner loop if main_loop, makes sure we do this as soon as possible by enforcing non-blocking IO processing. At this change, move variable definitions out of the inner loop to improve readability. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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