diff mbox

[v10,1/6] KVM: Add architecture-specific TLB flush implementations

Message ID 1409097072-1096-2-git-send-email-m.smarduch@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Mario Smarduch Aug. 26, 2014, 11:51 p.m. UTC 
Add support to declare architecture specific TLB flush function, for now only
ARMv7.

Signed-off-by: Mario Smarduch <m.smarduch@samsung.com>
---
 virt/kvm/Kconfig    | 3 +++
 virt/kvm/kvm_main.c | 4 ++++
 2 files changed, 7 insertions(+)
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Patch

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);