Some architectures may decide to do different things during
kvm_arch_vcpu_load depending on the ioctl being executed. For example,
arm64 is about to do significant work in vcpu load/put when running a
vcpu, but it's problematic to do this for any other vcpu ioctl than
KVM_RUN.
Further, while it may be possible to call kvm_arch_vcpu_load() for a
number of non-KVM_RUN ioctls, it makes the KVM/ARM code more difficult
to reason about, especially after my optimization series, because a lot
of things can now happen, where we have to consider if we're really in
the process of running a vcpu or not.
This series will first move the vcpu_load() and vcpu_put() calls in the
arch generic dispatch function into each case of the switch statement
and then, one-by-one, pushed the calls down into the architecture
specific code making the changes for each ioctl as required.
Patches also available at:
git://git.kernel.org/pub/scm/linux/kernel/git/cdall/linux.git vcpu-load-put-v2
Changes since v1:
- Fix PPC and S390 bugs from v1
- Take the mutex in the main disaptcher function and make vcpu_load a
void, which simplifies the patches overall.
- Add a patch that moves vcpu_load for arm/arm64 after the first-run
init function.
Thanks,
-Christoffer
Christoffer Dall (16):
KVM: Take vcpu->mutex outside vcpu_load
KVM: Prepare for moving vcpu_load/vcpu_put into arch specific code
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_run
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_regs
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_regs
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_sregs
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_sregs
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_mpstate
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_mpstate
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_translate
KVM: Move vcpu_load to arch-specific
kvm_arch_vcpu_ioctl_set_guest_debug
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_get_fpu
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_fpu
KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl
KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN
KVM: arm/arm64: Move vcpu_load call after kvm_vcpu_first_run_init
arch/arm64/kvm/guest.c | 12 +++--
arch/mips/kvm/mips.c | 58 +++++++++++++++--------
arch/powerpc/kvm/book3s.c | 24 +++++++++-
arch/powerpc/kvm/booke.c | 51 +++++++++++++++-----
arch/powerpc/kvm/powerpc.c | 19 +++++---
arch/s390/kvm/kvm-s390.c | 90 +++++++++++++++++++++++++++--------
arch/x86/kvm/vmx.c | 4 +-
arch/x86/kvm/x86.c | 107 ++++++++++++++++++++++++++++++------------
include/linux/kvm_host.h | 2 +-
virt/kvm/arm/arch_timer.c | 4 --
virt/kvm/arm/arm.c | 68 ++++++++++++++++++---------
virt/kvm/arm/vgic/vgic-init.c | 11 -----
virt/kvm/kvm_main.c | 17 ++-----
13 files changed, 323 insertions(+), 144 deletions(-)
--
2.7.4
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