[PATCH v12 1/6] KVM: Add architecture-defined TLB flush support

[Paolo Bonzini]

On 23/10/2014 00:34, Mario Smarduch wrote:
> This patch adds support for architecture implemented VM TLB flush, currently
> ARMv7 defines HAVE_KVM_ARCH_TLB_FLUSH_ALL. This leaves other architectures 
> unaffected using the generic version. In subsequent patch ARMv7 defines
> HAVE_KVM_ARCH_TLB_FLUSH_ALL and it's own TLB flush interface.
> 
> Signed-off-by: Mario Smarduch <m.smarduch at samsung.com>
> ---
>  virt/kvm/Kconfig    |    3 +++
>  virt/kvm/kvm_main.c |    2 ++
>  2 files changed, 5 insertions(+)
> 
> diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
> index fc0c5e6..3796a21 100644
> --- a/virt/kvm/Kconfig
> +++ b/virt/kvm/Kconfig
> @@ -37,3 +37,6 @@ 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 33712fb..887df87 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -184,6 +184,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req)
>  	return called;
>  }
>  
> +#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL
>  void kvm_flush_remote_tlbs(struct kvm *kvm)
>  {
>  	long dirty_count = kvm->tlbs_dirty;
> @@ -194,6 +195,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
>  	cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
>  }
>  EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
> +#endif
>  
>  void kvm_reload_remote_mmus(struct kvm *kvm)
>  {
> 

Reviewed-by: Paolo Bonzini <pbonzini at redhat.com>