[v5,4/7] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()

Commit Message

Raghavendra Rao Ananta June 6, 2023, 7:28 p.m. UTC

Implement kvm_arch_flush_remote_tlbs_range() for arm64
to invalidate the given range in the TLB.

Signed-off-by: Raghavendra Rao Ananta <[e-mail]>
---
 arch/arm64/include/asm/kvm_host.h | 3 +++
 arch/arm64/kvm/mmu.c              | 7 +++++++
 2 files changed, 10 insertions(+)

Patch

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 81ab41b84f436..343fb530eea9c 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1081,6 +1081,9 @@  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 d0a0d3dca9316..c3ec2141c3284 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -92,6 +92,13 @@  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);