From c1426e4c5add09042840013dfa5565e6be6d412e Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Wed, 4 Mar 2015 11:14:34 +0100 Subject: KVM: arm/arm64: implement kvm_arch_intc_initialized On arm/arm64 the VGIC is dynamically instantiated and it is useful to expose its state, especially for irqfd setup. This patch defines __KVM_HAVE_ARCH_INTC_INITIALIZED and implements kvm_arch_intc_initialized. Signed-off-by: Eric Auger Acked-by: Christoffer Dall Reviewed-by: Andre Przywara Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall --- arch/arm/include/asm/kvm_host.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/include/asm/kvm_host.h') diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 41008cd7c53f..902a7d1441ae 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -27,6 +27,8 @@ #include #include +#define __KVM_HAVE_ARCH_INTC_INITIALIZED + #if defined(CONFIG_KVM_ARM_MAX_VCPUS) #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS #else -- cgit From 35307b9a5f7ebcc8d8db41c73b69c131b48ace2b Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 12 Mar 2015 18:16:51 +0000 Subject: arm/arm64: KVM: Implement Stage-2 page aging Until now, KVM/arm didn't care much for page aging (who was swapping anyway?), and simply provided empty hooks to the core KVM code. With server-type systems now being available, things are quite different. This patch implements very simple support for page aging, by clearing the Access flag in the Stage-2 page tables. On access fault, the current fault handling will write the PTE or PMD again, putting the Access flag back on. It should be possible to implement a much faster handling for Access faults, but that's left for a later patch. With this in place, performance in VMs is degraded much more gracefully. Signed-off-by: Marc Zyngier Acked-by: Christoffer Dall Signed-off-by: Christoffer Dall --- arch/arm/include/asm/kvm_host.h | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) (limited to 'arch/arm/include/asm/kvm_host.h') diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 902a7d1441ae..d71607c16601 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -167,19 +167,10 @@ void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); +int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); +int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); /* We do not have shadow page tables, hence the empty hooks */ -static inline int kvm_age_hva(struct kvm *kvm, unsigned long start, - unsigned long end) -{ - return 0; -} - -static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) -{ - return 0; -} - static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, unsigned long address) { -- cgit