[PATCH v4 15/21] KVM: arm64: Introduce addr_is_memory()
From: Quentin Perret <hidden>
Date: 2021-08-09 15:26:02
Also in:
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
Introduce a helper usable in nVHE protected mode to check whether a physical address is in a RAM region or not. Signed-off-by: Quentin Perret <redacted> --- arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 1 + arch/arm64/kvm/hyp/nvhe/mem_protect.c | 7 +++++++ 2 files changed, 8 insertions(+)
diff --git a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
index 23316a021880..49db0ec5a606 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h@@ -51,6 +51,7 @@ extern const u8 pkvm_hyp_id; int __pkvm_prot_finalize(void); int __pkvm_mark_hyp(phys_addr_t start, phys_addr_t end); +bool addr_is_memory(phys_addr_t phys); int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_prot prot); int host_stage2_set_owner_locked(phys_addr_t addr, u64 size, u8 owner_id); int kvm_host_prepare_stage2(void *pgt_pool_base);
diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
index ee255171945c..cb023d31666e 100644
--- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c
+++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c@@ -197,6 +197,13 @@ static bool find_mem_range(phys_addr_t addr, struct kvm_mem_range *range) return false; } +bool addr_is_memory(phys_addr_t phys) +{ + struct kvm_mem_range range; + + return find_mem_range(phys, &range); +} + static bool range_is_memory(u64 start, u64 end) { struct kvm_mem_range r1, r2;
--
2.32.0.605.g8dce9f2422-goog
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