[PATCH v2 4/7] KVM: arm64: Implement kvm_arch_flush_remote_tlbs_range()
From: Raghavendra Rao Ananta <hidden>
Date: 2023-02-06 17:24:16
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, such that it can utilize the TLBI range based instructions if supported. Signed-off-by: Raghavendra Rao Ananta <redacted> --- arch/arm64/include/asm/kvm_host.h | 3 +++ arch/arm64/kvm/mmu.c | 15 +++++++++++++++ 2 files changed, 18 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index dee530d75b957..211fab0c1de74 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h@@ -1002,6 +1002,9 @@ 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 e98910a8d0af6..409cb187f4911 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c@@ -91,6 +91,21 @@ 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; + + if (!system_supports_tlb_range()) + return -EOPNOTSUPP; + + start = start_gfn << PAGE_SHIFT; + end = (start_gfn + pages) << PAGE_SHIFT; + + kvm_call_hyp(__kvm_tlb_flush_range_vmid_ipa, &kvm->arch.mmu, + start, end, KVM_PGTABLE_MAX_LEVELS - 1, 0); + return 0; +} + static bool kvm_is_device_pfn(unsigned long pfn) { return !pfn_is_map_memory(pfn);
--
2.39.1.519.gcb327c4b5f-goog
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