[PATCH v13 1/7] KVM: Add architecture-defined TLB flush support

[PATCH v13 1/7] KVM: Add architecture-defined TLB flush support

[Mario Smarduch]

Allow architectures to override the generic kvm_flush_remote_tlbs()
function via HAVE_KVM_ARCH_TLB_FLUSH_ALL. ARMv7 will need this to
provide its own TLB flush interface.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Mario Smarduch <m.smarduch@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)
 {
-- 
1.7.9.5

Re: [PATCH v13 1/7] KVM: Add architecture-defined TLB flush support

[Marc Zyngier]

On 07/11/14 00:40, Mario Smarduch wrote:
> Allow architectures to override the generic kvm_flush_remote_tlbs()
> function via HAVE_KVM_ARCH_TLB_FLUSH_ALL. ARMv7 will need this to
> provide its own TLB flush interface.
> 
> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>

	M.

> ---
>  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)
>  {
> 


-- 
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