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2009-12-03kvm: x86: Add support for VCPU event statesJan Kiszka
This patch extends the qemu-kvm state sync logic with support for KVM_GET/SET_VCPU_EVENTS, giving access to yet missing exception, interrupt and NMI states. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-11-17kvm: Add arch reset handlerJan Kiszka
Will be required by succeeding changes. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-11-12kvm: Move KVM mp_state accessors to i386-specific codeHollis Blanchard
Unbreaks PowerPC and S390 KVM builds. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-01Revert "Get rid of _t suffix"Anthony Liguori
In the very least, a change like this requires discussion on the list. The naming convention is goofy and it causes a massive merge problem. Something like this _must_ be presented on the list first so people can provide input and cope with it. This reverts commit 99a0949b720a0936da2052cb9a46db04ffc6db29. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-01Get rid of _t suffixmalc
Some not so obvious bits, slirp and Xen were left alone for the time being. Signed-off-by: malc <av1474@comtv.ru>
2009-09-12Fix sys-queue.h conflict for goodBlue Swirl
Problem: Our file sys-queue.h is a copy of the BSD file, but there are some additions and it's not entirely compatible. Because of that, there have been conflicts with system headers on BSD systems. Some hacks have been introduced in the commits 15cc9235840a22c289edbe064a9b3c19c5f49896, f40d753718c72693c5f520f0d9899f6e50395e94, 96555a96d724016e13190b28cffa3bc929ac60dc and 3990d09adf4463eca200ad964cc55643c33feb50 but the fixes were fragile. Solution: Avoid the conflict entirely by renaming the functions and the file. Revert the previous hacks. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-08-27kvm: Simplify cpu_synchronize_state()Avi Kivity
cpu_synchronize_state() is a little unreadable since the 'modified' argument isn't self-explanatory. Simplify it by making it always synchronize the kernel state into qemu, and automatically flush the registers back to the kernel if they've been synchronized on this exit. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-07-22provide tests for pit in kernel and irqchip in kernelGlauber Costa
KVM can have an in-kernel pit or irqchip. While we don't implement it yet, having a way for test for it (that always returns zero) will allow us to reuse code in qemu-kvm that tests for it. Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-06-29kvm: Rework VCPU synchronizationJan Kiszka
During startup and after reset we have to synchronize user space to the in-kernel KVM state. Namely, we need to transfer the VCPU registers when they change due to VCPU as well as APIC reset. This patch refactors the required hooks so that kvm_init_vcpu registers its own per-VCPU reset handler and adds a cpu_synchronize_state to the APIC reset. That way we no longer depend on the new reset order (and can drop this disliked interface again) and we can even drop a KVM hook in main(). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-22kvm: x86: Save/restore KVM-specific CPU statesJan Kiszka
Save and restore all so far neglected KVM-specific CPU states. Handling the TSC stabilizes migration in KVM mode. The interrupt_bitmap and mp_state are currently unused, but will become relevant for in-kernel irqchip support. By including proper saving/restoring already, we avoid having to increment CPU_SAVE_VERSION later on once again. v2: - initialize mp_state runnable (for the boot CPU) Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-22kvm: Rework dirty bitmap synchronizationJan Kiszka
Extend kvm_physical_sync_dirty_bitmap() so that is can sync across multiple slots. Useful for updating the whole dirty log during migration. Moreover, properly pass down errors the whole call chain. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-22kvm: Introduce kvm_set_migration_logJan Kiszka
Introduce a global dirty logging flag that enforces logging for all slots. This can be used by the live migration code to enable/disable global logging withouth destroying the per-slot setting. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-08kvm: Add support for querying supported cpu featuresAvi Kivity
kvm does not support all cpu features; add support for dunamically querying the supported feature set. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-08Introduce kvm_check_extension to check if KVM extensions are supportedAnthony Liguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-05-01kvm: Avoid COW if KVM MMU is asynchronousJan Kiszka
Avi Kivity wrote: > Suggest wrapping in a function and hiding it deep inside kvm-all.c. > Done in v2: ----------> If the KVM MMU is asynchronous (kernel does not support MMU_NOTIFIER), we have to avoid COW for the guest memory. Otherwise we risk serious breakage when guest pages change there physical locations due to COW after fork. Seen when forking smbd during runtime via -smb. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-04-17kvm: Add sanity checks to slot management (Jan Kiszka)aliguori
Fail loudly if we run out of memory slot. Make sure that dirty log start/stop works with consistent memory regions by reporting invalid parameters. This reveals several inconsistencies in the vga code, patch to fix them follows later in this series. And, for simplicity reasons, also catch and report unaligned memory regions passed to kvm_set_phys_mem (KVM works on page basis). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7138 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-12Guest debugging support for KVM (Jan Kiszka)aliguori
This is a backport of the guest debugging support for the KVM accelerator that is now part of the KVM tree. It implements the reworked KVM kernel API for guest debugging (KVM_CAP_SET_GUEST_DEBUG) which is not yet part of any mainline kernel but will probably be 2.6.30 stuff. So far supported is x86, but PPC is expected to catch up soon. Core features are: - unlimited soft-breakpoints via code patching - hardware-assisted x86 breakpoints and watchpoints Changes in this version: - use generic hook cpu_synchronize_state to transfer registers between user space and kvm - push kvm_sw_breakpoints into KVMState Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6825 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-15kvm: sync vcpu state during initialization (Hollis Blanchard)aliguori
Currently on x86, qemu initializes CPUState but KVM ignores it and does its own vcpu initialization. However, PowerPC KVM needs to be able to set the initial register state to support the -kernel and -append options. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6060 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-09KVM: Coalesced MMIO supportaliguori
MMIO exits are more expensive in KVM or Xen than in QEMU because they involve, at least, privilege transitions. However, MMIO write operations can be effectively batched if those writes do not have side effects. Good examples of this include VGA pixel operations when in a planar mode. As it turns out, we can get a nice boost in other areas too. Laurent mentioned a 9.7% performance boost in iperf with the coalesced MMIO changes for the e1000 when he originally posted this work for KVM. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5961 c046a42c-6fe2-441c-8c8c-71466251a162
2008-12-04Add virtio-balloon supportaliguori
This adds a VirtIO based balloon driver. It uses madvise() to actually balloon the memory when possible. Until 2.6.27, KVM forced memory pinning so we must disable ballooning unless the kernel actually supports it when using KVM. It's always safe when using TCG. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5874 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-24kvm: Introduce kvm logging interface (Glauber Costa)aliguori
Introduce functions to control logging of memory regions. We select regions based on its start address, a guest_physical_addr (target_phys_addr_t, in qemu nomenclature). The main user of this interface right now is VGA optimization (a way of reducing the number of mmio exits). Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5792 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-13Define kvm_ioctl in the same way as ioctlaliguori
The third argument to ioctl is a ... which allows any value to be passed. In practice, glibc always treats the argument as a void *. Do the same thing for the kvm ioctls to keep things consistent with a traditional ioctl. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5715 c046a42c-6fe2-441c-8c8c-71466251a162
2008-11-05Add missing files to KVM commit.aliguori
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5629 c046a42c-6fe2-441c-8c8c-71466251a162
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