[PATCH v4 3/6] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()
From: Raghavendra Rao Ananta <hidden>
Date: 2023-05-19 00:52:50
Also in:
kvm, kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
Implement kvm_arch_flush_remote_tlbs_range() for arm64 to invalidate the given range in the TLB. Signed-off-by: Raghavendra Rao Ananta <redacted> --- 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
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