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>
---
arch/arm64/include/asm/kvm_host.h | 3 +++
arch/arm64/kvm/hyp/nvhe/tlb.c | 4 +---
arch/arm64/kvm/mmu.c | 11 +++++++++++
3 files changed, 15 insertions(+), 3 deletions(-)
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/hyp/nvhe/tlb.c b/arch/arm64/kvm/hyp/nvhe/tlb.c
index d4ea549c4b5c4..d2c7c1bc6d441 100644
--- a/arch/arm64/kvm/hyp/nvhe/tlb.c
+++ b/arch/arm64/kvm/hyp/nvhe/tlb.c
@@ -150,10 +150,8 @@ void __kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
return;
}
- dsb(ishst);
-
/* Switch to requested VMID */
- __tlb_switch_to_guest(mmu, &cxt);
+ __tlb_switch_to_guest(mmu, &cxt, false);
__flush_tlb_range_op(ipas2e1is, start, pages, stride, 0, 0, false);
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index d0a0d3dca9316..e3673b4c10292 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -92,6 +92,17 @@ 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)
+{
+ phys_addr_t start, end;
+
+ start = start_gfn << PAGE_SHIFT;
+ end = (start_gfn + pages) << PAGE_SHIFT;
+
+ kvm_call_hyp(__kvm_tlb_flush_vmid_range, &kvm->arch.mmu, start, end);
+ return 0;
+}
+
static bool kvm_is_device_pfn(unsigned long pfn)
{
return !pfn_is_map_memory(pfn);
--
2.40.1.698.g37aff9b760-goog
