Re: [PATCH v6 08/11] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()

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On 7/15/23 08:54, Raghavendra Rao Ananta wrote:
Implement kvm_arch_flush_remote_tlbs_range() for arm64
to invalidate the given range in the TLB.

Signed-off-by: Raghavendra Rao Ananta <rananta@xxxxxxxxxx>
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
Reviewed-by: Shaoqin Huang <shahuang@xxxxxxxxxx>
---
  arch/arm64/include/asm/kvm_host.h | 3 +++
  arch/arm64/kvm/mmu.c              | 7 +++++++
  2 files changed, 10 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7281222f24ef..52d3ed918893 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1114,6 +1114,9 @@ struct kvm *kvm_arch_alloc_vm(void);
  #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
  int kvm_arch_flush_remote_tlbs(struct kvm *kvm);
+#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
+int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages);
+
  static inline bool kvm_vm_is_protected(struct kvm *kvm)
  {
  	return false;
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 0ac721fa27f1..387f2215fde7 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -172,6 +172,13 @@ int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
  	return 0;
  }
+int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, u64 pages)
+{
+	kvm_tlb_flush_vmid_range(&kvm->arch.mmu,
+				start_gfn << PAGE_SHIFT, pages << PAGE_SHIFT);
+	return 0;
+}
+
  static bool kvm_is_device_pfn(unsigned long pfn)
  {
  	return !pfn_is_map_memory(pfn);

--
Shaoqin




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