[v9,11/14] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()

Commit Message

Raghavendra Rao Ananta Aug. 11, 2023, 4:51 a.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]>
Reviewed-by: Gavin Shan <[e-mail]>
Reviewed-by: Shaoqin Huang <[e-mail]>
---
 arch/arm64/include/asm/kvm_host.h | 2 ++
 arch/arm64/kvm/mmu.c              | 8 ++++++++
 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 20f2ba149c70c..8f2d99eaab036 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -1113,6 +1113,8 @@  struct kvm *kvm_arch_alloc_vm(void);
 
 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
 
+#define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
+
 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 0ac721fa27f18..702f8715f9fe7 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -172,6 +172,14 @@  int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
 	return 0;
 }
 
+int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm,
+				      gfn_t gfn, u64 nr_pages)
+{
+	kvm_tlb_flush_vmid_range(&kvm->arch.mmu,
+				gfn << PAGE_SHIFT, nr_pages << PAGE_SHIFT);
+	return 0;
+}
+
 static bool kvm_is_device_pfn(unsigned long pfn)
 {
 	return !pfn_is_map_memory(pfn);