- 22 7月, 2009 3 次提交
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由 Glauber Costa 提交于
on_vcpu is a qemu-kvm function that will make sure that a specific piece of code will run on a requested cpu. We don't need that because we're restricted to -smp 1 right now, but those days are likely to end soon. So for the benefit of having qemu-kvm share more code with us, I'm introducing our own version of on_vcpu(). Right now, we either run a function on the current cpu, or abort the execution, because it would mean something is seriously wrong. As an example code, I "ported" kvm_update_guest_debug to use it, with some slight differences from qemu-kvm. This is probably 0.12 material Signed-off-by: NGlauber Costa <glommer@redhat.com> CC: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Alexander Graf 提交于
Some KVM platforms don't support dirty logging yet, like IA64 and PPC, so in order to still have screen updates on those, we need to fake it. This patch just tells the getter function for dirty bitmaps, that all pages within a slot are dirty when the slot has dirty logging enabled. That way we can implement dirty logging on those platforms sometime when it drags down performance, but share the rest of the code with dirty logging capable platforms. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Alexander Graf 提交于
This fixes a warning I stumbled across while compiling qemu on PPC64. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 30 6月, 2009 2 次提交
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由 Jan Kiszka 提交于
This reverts commit 8217606e (and updates later added users of qemu_register_reset), we solved the problem it originally addressed less invasively. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 17 6月, 2009 1 次提交
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由 Jan Kiszka 提交于
User space may only inject interrupts during kvm_arch_pre_run if ready_for_interrupt_injection is set in kvm_run. But that field is updated on exit from KVM_RUN, so we must ensure that we enter the kernel after potentially queuing an interrupt, otherwise we risk to loose one - like it happens with the current code against latest kernel modules (since kvm-86) that started to queue only a single interrupt. Fix the problem by reordering kvm_cpu_exec. Credits go to Gleb Natapov for analyzing the issue in details. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 07 6月, 2009 1 次提交
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由 Jan Kiszka 提交于
Users complained that it is not obvious what to do when kvm refuses to build or run due to an unsupported host kernel, so let's improve the hints. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
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- 22 5月, 2009 6 次提交
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由 Jan Kiszka 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
Use standard callback with highest order to synchronize VCPU on reset after all device callbacks were execute. This allows to remove the special kvm hook in qemu_system_reset. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
The buffer passed to KVM_GET_DIRTY_LOG requires one bit per page. Fix the size calculation in kvm_physical_sync_dirty_bitmap accordingly, avoiding allocation of extremly oversized buffers. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
Only apply the workaround for broken slot joining in KVM when the capability was not found that signals the corresponding fix existence. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 20 5月, 2009 1 次提交
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由 Mark McLoughlin 提交于
Right now, if you try e.g. '-smp 2' you just get 'failed to initialize KVM'. Signed-off-by: NMark McLoughlin <markmc@redhat.com>
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- 09 5月, 2009 1 次提交
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由 Anthony Liguori 提交于
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 01 5月, 2009 2 次提交
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由 Jan Kiszka 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Jan Kiszka 提交于
There is no need to reject an unaligned memory region registration if the region will be I/O memory and it will not split an existing KVM slot. This fixes KVM support on PPC. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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- 17 4月, 2009 3 次提交
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由 aliguori 提交于
This reworks the slot management to handle more patterns of cpu_register_physical_memory*, finally allowing to reset KVM guests (so far address remapping on reset broke the slot management). We could actually handle all possible ones without failing, but a KVM kernel bug in older versions would force us to track all previous fragmentations and maintain them (as that bug prevents registering larger slots that overlap also deleted ones). To remain backward compatible but avoid overly complicated workarounds, we apply a simpler workaround that covers all currently used patterns. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7139 c046a42c-6fe2-441c-8c8c-71466251a162
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由 aliguori 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7138 c046a42c-6fe2-441c-8c8c-71466251a162
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由 aliguori 提交于
Testing for TLB_MMIO on unmap makes no sense as A) that flag belongs to CPUTLBEntry and not to io_memory slots or physical addresses and B) we already use a different condition before mapping. So make this test consistent. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7137 c046a42c-6fe2-441c-8c8c-71466251a162
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- 11 4月, 2009 1 次提交
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由 pbrook 提交于
Signed-off-by: NPaul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@7085 c046a42c-6fe2-441c-8c8c-71466251a162
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- 13 3月, 2009 1 次提交
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由 aliguori 提交于
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: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6825 c046a42c-6fe2-441c-8c8c-71466251a162
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- 07 3月, 2009 1 次提交
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由 aurel32 提交于
env->interrupt_request is accessed as the bit level from both main code and signal handler, making a race condition possible even on CISC CPU. This causes freeze of QEMU under high load when running the dyntick clock. The patch below move the bit corresponding to CPU_INTERRUPT_EXIT in a separate variable, declared as volatile sig_atomic_t, so it should be work even on RISC CPU. We may want to move the cpu_interrupt(env, CPU_INTERRUPT_EXIT) case in its own function and get rid of CPU_INTERRUPT_EXIT. That can be done later, I wanted to keep the patch short for easier review. Signed-off-by: NAurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6728 c046a42c-6fe2-441c-8c8c-71466251a162
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- 06 2月, 2009 1 次提交
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由 aliguori 提交于
Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6531 c046a42c-6fe2-441c-8c8c-71466251a162
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- 19 12月, 2008 1 次提交
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由 aurel32 提交于
Move s under #ifdef to avoid compiler warning. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAurelien Jarno <aurelien@aurel32.net> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6086 c046a42c-6fe2-441c-8c8c-71466251a162
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- 16 12月, 2008 1 次提交
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由 aliguori 提交于
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: NHollis Blanchard <hollisb@us.ibm.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6060 c046a42c-6fe2-441c-8c8c-71466251a162
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- 10 12月, 2008 2 次提交
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由 aliguori 提交于
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: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5961 c046a42c-6fe2-441c-8c8c-71466251a162
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由 aliguori 提交于
Prior to kvm-80, memory slot deletion was broken in the KVM kernel modules. In kvm-81, a new capability is introduced to signify that this problem has been fixed. Since we rely on being able to delete memory slots, refuse to work with any kernel module that does not have this capability present. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5960 c046a42c-6fe2-441c-8c8c-71466251a162
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- 05 12月, 2008 1 次提交
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由 aliguori 提交于
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: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5874 c046a42c-6fe2-441c-8c8c-71466251a162
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- 25 11月, 2008 1 次提交
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由 aliguori 提交于
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: NGlauber Costa <glommer@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5792 c046a42c-6fe2-441c-8c8c-71466251a162
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- 20 11月, 2008 1 次提交
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由 aliguori 提交于
struct kvm_userspace_memory_region does not use QEMU friendly types to define memory slots. This results in lots of ugly casting with warnings on 32-bit platforms. This patch introduces a proper KVMSlot structure that uses QEMU types to describe memory slots. This eliminates many of the casts and isolates the type conversions to one spot. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5755 c046a42c-6fe2-441c-8c8c-71466251a162
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- 19 11月, 2008 1 次提交
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由 aliguori 提交于
Besides unassigned memory, we also don't care about MMIO. So if we're giving an MMIO area that is already registered, wipe it out. Signed-off-by: NGlauber Costa <glommer@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5753 c046a42c-6fe2-441c-8c8c-71466251a162
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- 18 11月, 2008 1 次提交
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由 aliguori 提交于
KVM keeps track of physical memory based on slots in the kernel. The current code that translates QEMU memory mappings to slots work but is not robust in the fact of reregistering partial regions of memory. This patch does the right thing for reregistering partial regions of memory. It also prevents QEMU from using KVM private slots. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5734 c046a42c-6fe2-441c-8c8c-71466251a162
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- 14 11月, 2008 1 次提交
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由 aliguori 提交于
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: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5715 c046a42c-6fe2-441c-8c8c-71466251a162
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- 10 11月, 2008 1 次提交
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由 aliguori 提交于
We don't need to use cpu_loop_exit() because we never use the condition codes so everything can be folded into a single case. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5669 c046a42c-6fe2-441c-8c8c-71466251a162
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- 06 11月, 2008 1 次提交
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由 aliguori 提交于
Signed-off-by: NAnthony 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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