[PATCH v8 11/14] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()

Raghavendra Rao Ananta
2023-08-08T23:14:24Z

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

Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
---
arch/arm64/include/asm/kvm_host.h | 2 ++
arch/arm64/kvm/mmu.c | 8 ++++++++
2 files changed, 10 insertions(+)

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..294078ce16349 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,
+ start_gfn << PAGE_SHIFT, nr_pages << PAGE_SHIFT);
+ return 0;
+}
+
static bool kvm_is_device_pfn(unsigned long pfn)
{
return !pfn_is_map_memory(pfn);
--
2.41.0.640.ga95def55d0-goog