On 08.03.2012, at 22:44, Christoffer Dall wrote: > Any news on the status of this? > > On Thu, Feb 9, 2012 at 8:45 PM, Alexander Graf <agraf@xxxxxxx> wrote: >> >> On 10.02.2012, at 02:40, Christoffer Dall wrote: >> >>> The kvm_vcpu_kick function performs roughly the same funcitonality on >>> most all architectures, so we shouldn't have separate copies. >>> >>> PowerPC keeps a pointer to interchanging waitqueues on the vcpu_arch >>> structure and to accomodate this special need a >>> __KVM_HAVE_ARCH_VCPU_GET_WQ define and accompanying function >>> kvm_arch_vcpu_wq have been defined. For all other architectures this >>> is a generic inline that just returns &vcpu->wq; >>> >>> This patch applies to d1c28f7568a74faacec896ee4f84afbffd20e5ab on >>> git://git.kernel.org/pub/scm/virt/kvm/kvm.git. >>> >>> Changes since v3: >>> - Doesn't try to generalize vcpu->mode across all architectures and >>> instead calls kvm_arch_vcpu_should_kick, which is properly defined >>> on x86 and ia64, but other architectures simply return 1 as to maintain >>> status quo. >>> >>> Changes since v2: >>> - Restore arch-specific vcpu->cpu assignment to arch-specific code >>> >>> Changes since v1: >>> - Abstact CPU mode check into arch-specific function >>> - Remove redundant vcpu->cpu assignment >>> >>> Signed-off-by: Christoffer Dall <c.dall@xxxxxxxxxxxxxxxxxxxxxx> >>> --- >>> arch/ia64/include/asm/kvm_host.h | 1 + >>> arch/ia64/kvm/kvm-ia64.c | 20 +++++--------------- >>> arch/powerpc/include/asm/kvm_host.h | 6 ++++++ >>> arch/powerpc/kvm/powerpc.c | 21 ++++++--------------- >>> arch/s390/kvm/kvm-s390.c | 8 ++++++++ >>> arch/x86/kvm/x86.c | 16 ++-------------- >>> include/linux/kvm_host.h | 9 +++++++++ >>> virt/kvm/kvm_main.c | 22 ++++++++++++++++++++++ >>> 8 files changed, 59 insertions(+), 44 deletions(-) >>> >>> diff --git a/arch/ia64/include/asm/kvm_host.h b/arch/ia64/include/asm/kvm_host.h >>> index 2689ee5..06a5e91 100644 >>> --- a/arch/ia64/include/asm/kvm_host.h >>> +++ b/arch/ia64/include/asm/kvm_host.h >>> @@ -365,6 +365,7 @@ struct thash_cb { >>> }; >>> >>> struct kvm_vcpu_stat { >>> + u32 halt_wakeup; >>> }; >>> >>> struct kvm_vcpu_arch { >>> diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c >>> index 8ca7261..96dceaa 100644 >>> --- a/arch/ia64/kvm/kvm-ia64.c >>> +++ b/arch/ia64/kvm/kvm-ia64.c >>> @@ -1857,21 +1857,6 @@ void kvm_arch_hardware_unsetup(void) >>> { >>> } >>> >>> -void kvm_vcpu_kick(struct kvm_vcpu *vcpu) >>> -{ >>> - int me; >>> - int cpu = vcpu->cpu; >>> - >>> - if (waitqueue_active(&vcpu->wq)) >>> - wake_up_interruptible(&vcpu->wq); >>> - >>> - me = get_cpu(); >>> - if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu)) >>> - if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) >>> - smp_send_reschedule(cpu); >>> - put_cpu(); >>> -} >>> - >>> int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq) >>> { >>> return __apic_accept_irq(vcpu, irq->vector); >>> @@ -1941,6 +1926,11 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) >>> (kvm_highest_pending_irq(vcpu) != -1); >>> } >>> >>> +int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) >>> +{ >>> + return (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)); >>> +} >>> + >>> int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, >>> struct kvm_mp_state *mp_state) >>> { >>> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h >>> index 1843d5d..d089969 100644 >>> --- a/arch/powerpc/include/asm/kvm_host.h >>> +++ b/arch/powerpc/include/asm/kvm_host.h >>> @@ -495,4 +495,10 @@ struct kvm_vcpu_arch { >>> #define KVM_MMIO_REG_QPR 0x0040 >>> #define KVM_MMIO_REG_FQPR 0x0060 >>> >>> +#define __KVM_HAVE_ARCH_VCPU_GET_WQ 1 >>> +static inline wait_queue_head *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu) >>> +{ >>> + return vcpu->arch.wqp; Sorry for the late notification - I didn't compile test it. That code breaks for 2 reasons: 1) It's wait_queue_head_t, not wait_queue_head 2) struct kvm_vcpu isn't defined here yet, only arch is. Maybe we could pass in &vcpu->arch instead of vcpu? Or move the function somewhere else? Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html