| Message ID | 1411433690-8104-2-git-send-email-m.smarduch@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 23.09.14 02:54, Mario Smarduch wrote: > Add support to declare architecture specific TLB flush function, for now ARMv7. > > Signed-off-by: Mario Smarduch <m.smarduch@samsung.com> > --- > include/linux/kvm_host.h | 1 + > virt/kvm/Kconfig | 3 +++ > virt/kvm/kvm_main.c | 4 ++++ > 3 files changed, 8 insertions(+) > > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index ec4e3bd..a49a6df 100644 > --- a/include/linux/kvm_host.h > +++ b/include/linux/kvm_host.h > @@ -592,6 +592,7 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); > void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); > > void kvm_flush_remote_tlbs(struct kvm *kvm); > +void kvm_arch_flush_remote_tlbs(struct kvm *kvm); > void kvm_reload_remote_mmus(struct kvm *kvm); > void kvm_make_mclock_inprogress_request(struct kvm *kvm); > void kvm_make_scan_ioapic_request(struct kvm *kvm); > diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig > index 13f2d19..f1efaa5 100644 > --- a/virt/kvm/Kconfig > +++ b/virt/kvm/Kconfig > @@ -34,3 +34,6 @@ config HAVE_KVM_CPU_RELAX_INTERCEPT > > config KVM_VFIO > bool > + > +config HAVE_KVM_ARCH_TLB_FLUSH_ALL > + bool > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 4b6c01b..d0a24f5 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -186,12 +186,16 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) > > void kvm_flush_remote_tlbs(struct kvm *kvm) > { > +#ifdef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL Please make this an #ifndef on the outer definition and just define your own copy of this function inside of arch/arm/kvm :). Alex > + kvm_arch_flush_remote_tlbs(kvm); > +#else > long dirty_count = kvm->tlbs_dirty; > > smp_mb(); > if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) > ++kvm->stat.remote_tlb_flush; > cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); > +#endif > } > EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs); > >
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index ec4e3bd..a49a6df 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -592,6 +592,7 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); void kvm_flush_remote_tlbs(struct kvm *kvm); +void kvm_arch_flush_remote_tlbs(struct kvm *kvm); void kvm_reload_remote_mmus(struct kvm *kvm); void kvm_make_mclock_inprogress_request(struct kvm *kvm); void kvm_make_scan_ioapic_request(struct kvm *kvm); diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index 13f2d19..f1efaa5 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -34,3 +34,6 @@ config HAVE_KVM_CPU_RELAX_INTERCEPT config KVM_VFIO bool + +config HAVE_KVM_ARCH_TLB_FLUSH_ALL + bool diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4b6c01b..d0a24f5 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -186,12 +186,16 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) void kvm_flush_remote_tlbs(struct kvm *kvm) { +#ifdef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL + kvm_arch_flush_remote_tlbs(kvm); +#else long dirty_count = kvm->tlbs_dirty; smp_mb(); if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) ++kvm->stat.remote_tlb_flush; cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); +#endif } EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
Add support to declare architecture specific TLB flush function, for now ARMv7. Signed-off-by: Mario Smarduch <m.smarduch@samsung.com> --- include/linux/kvm_host.h | 1 + virt/kvm/Kconfig | 3 +++ virt/kvm/kvm_main.c | 4 ++++ 3 files changed, 8 insertions(+)