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KVM: Add architecture-defined TLB flush support 

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: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
This commit is contained in:
Mario Smarduch 2015-01-15 15:58:52 -08:00 committed by Christoffer Dall
parent 924de80db9
commit a6d5101661
2 changed files with 5 additions and 0 deletions
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3
virt/kvm/Kconfig
View File

@ -37,3 +37,6 @@ config HAVE_KVM_CPU_RELAX_INTERCEPT
config KVM_VFIO config KVM_VFIO
bool bool
config HAVE_KVM_ARCH_TLB_FLUSH_ALL
bool

2
virt/kvm/kvm_main.c
View File

@ -176,6 +176,7 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)
return called; return called;
} }
#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL
void kvm_flush_remote_tlbs(struct kvm *kvm) void kvm_flush_remote_tlbs(struct kvm *kvm)
{ {
long dirty_count = kvm->tlbs_dirty; long dirty_count = kvm->tlbs_dirty;
@ -186,6 +187,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
} }
EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs); EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
#endif
void kvm_reload_remote_mmus(struct kvm *kvm) void kvm_reload_remote_mmus(struct kvm *kvm)
{ {