aboutsummaryrefslogtreecommitdiff
path: root/target-s390x/kvm.c
AgeCommit message (Collapse)AuthorFilesLines
2012-03-14target-s390x: Don't overuse CPUStateAndreas Färber1-28/+28
Scripted conversion: sed -i "s/CPUState/CPUS390XState/g" target-s390x/*.[hc] sed -i "s/#define CPUS390XState/#define CPUState/" target-s390x/cpu.h Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Anthony Liguori <aliguori@us.ibm.com>
2012-01-04s390: fix cpu hotplug / cpu activity on interruptsChristian Borntraeger1-3/+0
The add_del/running_cpu code and env->halted are tracking stopped cpus. Sleeping cpus (idle and enabled for interrupts) are waiting inside the kernel. No interrupt besides the restart can move a cpu from stopped to operational. This is already handled over there. So lets just remove the bogus wakup from the common interrupt delivery, otherwise any interrupt will wake up a cpu, even if this cpu is stopped (Thus leading to strange hangs on sigp restart) This fixes echo 0 > /sys/devices/system/cpu/cpu0/online echo 1 > /sys/devices/system/cpu/cpu0/online in the guest Signed-off-by: Christian Borntraeger<borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-11-14s390: Fix cpu shutdown for KVMChristian Borntraeger1-12/+7
On s390 a shutdown is the state of all CPUs being either stopped or disabled (for interrupts) waiting. We have to track the overall number of running CPUs to call the shutdown sequence accordingly. This patch implements the counting and shutdown handling for the kvm path in qemu. Lets also wrap changes to env->halted and env->exception_index. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-20s390x: Fix debugging for unknown sigp order codesChristian Borntraeger1-1/+1
On unknown sigp order codes we print a debug message. This patch fixes the output, since we want to see the order_code and not the register numbers. Patch applies on agraf tree. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-20s390x: Adjust internal kvm codeAlexander Graf1-37/+7
We're now finally emulating an s390x CPU, so we can move quite some logic from the kvm code out into generic CPU code. This patch does this and adjusts the interfaces according to what the code around now expects to be able to call. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-20s390x: fix smp support for kvmChristian Borntraeger1-1/+1
Currently smp support for kvm does not work. Qemu does a kvm run even on secondary CPUs which dont have a sane state (initial psw == 0) triggering some program faults. Architecturally these cpus are in the stopped state, so we should not do the kvm run ioctl. (these CPUs will be started by a SIGP restart later during the boot process) We need to tell the loop that this cpu should not run. Jan Kiszka pointed out that kvm_arch_process_async_events is the right place to do. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-18s390x: Prepare cpu.h for emulationAlexander Graf1-9/+8
We need to add some more logic to the CPU description to leverage emulation of an s390x CPU. This patch adds all the required helpers, fields in CPUState and constant definitions required for user and system emulation. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-04-04s390x: fix KVM targetAlexander Graf1-1/+1
During Jan's rework of the generic KVM layer, he added some more error checks and actually aborted if something went wrong. Unfortunately, one of the s390 internal error codes slipped through, aborting the VM without needing to. This patch fixes booting of S390x virtual machines in KVM. Signed-off-by: Alexander Graf <agraf@suse.de> CC: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-03-16kvm: Align kvm_arch_handle_exit to kvm_cpu_exec changesJan Kiszka1-0/+5
Make the return code of kvm_arch_handle_exit directly usable for kvm_cpu_exec. This is straightforward for x86 and ppc, just s390 would require more work. Avoid this for now by pushing the return code translation logic into s390's kvm_arch_handle_exit. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-03-15kvm: Rename kvm_arch_process_irqchip_events to async_eventsJan Kiszka1-1/+1
We will broaden the scope of this function on x86 beyond irqchip events. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-03-13always qemu_cpu_kick after unhalting a cpuPaolo Bonzini1-0/+1
This ensures env->halt_cond is broadcast, and the loop in qemu_tcg_wait_io_event and qemu_kvm_wait_io_event is exited naturally rather than through a timeout. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-02-14kvm: Drop return values from kvm_arch_pre/post_runJan Kiszka1-4/+2
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: Provide sigbus services arch-independentlyJan Kiszka1-0/+10
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>
2011-01-23kvm: Consolidate must-have capability checksJan Kiszka1-0/+4
Instead of splattering the code with #ifdefs and runtime checks for capabilities we cannot work without anyway, provide central test infrastructure for verifying their availability both at build and runtime. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-01-23kvm: Drop smp_cpus argument from init functionsJan Kiszka1-1/+1
No longer used. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-12-26s390: compile fixesAlexander Graf1-1/+1
The s390 target doesn't compile out of the box anymore. This patch fixes all the obvious glitches that got introduced in the last few weeks. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-18target-s390: enable SIGP Initial ResetAlexander Graf1-3/+14
For SMP to work with KVM, we need to properly emulate the SIGP Initial Reset Command. Recent (2.6.32) kernels issue that before the SIGP Reset command that actually wakes up the vcpu. This patch makes -smp work on S390x. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-05-11Do not stop VM if emulation failed in userspace.Gleb Natapov1-0/+5
Continue vcpu execution in case emulation failure happened while vcpu was in userspace. In this case #UD will be injected into the guest allowing guest OS to kill offending process and continue. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-05-11kvm: enable smp > 1Marcelo Tosatti1-0/+5
Process INIT/SIPI requests and enable -smp > 1. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-03-04KVM: Rework VCPU state writeback APIJan Kiszka1-2/+1
This grand cleanup drops all reset and vmsave/load related synchronization points in favor of four(!) generic hooks: - cpu_synchronize_all_states in qemu_savevm_state_complete (initial sync from kernel before vmsave) - cpu_synchronize_all_post_init in qemu_loadvm_state (writeback after vmload) - cpu_synchronize_all_post_init in main after machine init - cpu_synchronize_all_post_reset in qemu_system_reset (writeback after system reset) These writeback points + the existing one of VCPU exec after cpu_synchronize_state map on three levels of writeback: - KVM_PUT_RUNTIME_STATE (during runtime, other VCPUs continue to run) - KVM_PUT_RESET_STATE (on synchronous system reset, all VCPUs stopped) - KVM_PUT_FULL_STATE (on init or vmload, all VCPUs stopped as well) This level is passed to the arch-specific VCPU state writing function that will decide which concrete substates need to be written. That way, no writer of load, save or reset functions that interact with in-kernel KVM states will ever have to worry about synchronization again. That also means that a lot of reasons for races, segfaults and deadlocks are eliminated. cpu_synchronize_state remains untouched, just as Anthony suggested. We continue to need it before reading or writing of VCPU states that are also tracked by in-kernel KVM subsystems. Consequently, this patch removes many cpu_synchronize_state calls that are now redundant, just like remaining explicit register syncs. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-02-14Fix incorrect exception_index useBlue Swirl1-2/+2
env->exception_index should be cleared with -1, not 0. See also 821b19fe923ac49a24cdb4af902584fdd019cee6. Spotted by Igor Kovalenko. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-12-18target-s390: Fail on unknown instructionsAlexander Graf1-1/+1
We were being a bit too nice and didn't give the guest an invalid instruction interrupt. While that works, it's not exactly the fastest thing to do, since now the guest doesn't know that we're not really implementing that instruction, so it continues doing it. We run into this with the set_page_unstable hint instruction. So let's bail out in these cases. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2009-12-05Add KVM support for S390xAlexander Graf1-0/+483
S390x was one of the first platforms that received support for KVM back in the day. Unfortunately until now there hasn't been a qemu implementation that would enable users to actually run guests. So let's include support for KVM S390x in qemu! Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
generated by cgit v1.1 at 2024-12-25 02:38:15 +0000