[PATCH v3 13/21] KVM: arm64: Expose host stage-2 manipulation helpers
From: Quentin Perret <hidden>
Date: 2021-07-29 13:29:33
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
We will need to manipulate the host stage-2 page-table from outside mem_protect.c soon. Introduce two functions allowing this, and make them usable to users of mem_protect.h. Signed-off-by: Quentin Perret <redacted> --- arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 2 ++ arch/arm64/kvm/hyp/nvhe/mem_protect.c | 17 ++++++++++++++++- 2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
index ae355bfd8c01..47c2a0c51612 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h@@ -49,6 +49,8 @@ extern struct host_kvm host_kvm; int __pkvm_prot_finalize(void); int __pkvm_mark_hyp(phys_addr_t start, phys_addr_t end); +int host_stage2_idmap_locked(u64 start, u64 end, enum kvm_pgtable_prot prot); +int host_stage2_set_owner_locked(u64 start, u64 end, u8 owner_id); int kvm_host_prepare_stage2(void *pgt_pool_base); void handle_host_mem_abort(struct kvm_cpu_context *host_ctxt);
diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvhe/mem_protect.c
index 70c57d2c3024..a7f6134789e0 100644
--- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c
+++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c@@ -272,6 +272,21 @@ static int host_stage2_adjust_range(u64 addr, struct kvm_mem_range *range) return 0; } +int host_stage2_idmap_locked(u64 start, u64 end, enum kvm_pgtable_prot prot) +{ + hyp_assert_lock_held(&host_kvm.lock); + + return host_stage2_try(__host_stage2_idmap, start, end, prot); +} + +int host_stage2_set_owner_locked(u64 start, u64 end, u8 owner_id) +{ + hyp_assert_lock_held(&host_kvm.lock); + + return host_stage2_try(kvm_pgtable_stage2_set_owner, &host_kvm.pgt, + start, end - start, &host_s2_pool, owner_id); +} + static bool host_stage2_force_pte_cb(u64 addr, u64 end, enum kvm_pgtable_prot prot) { /*
@@ -309,7 +324,7 @@ static int host_stage2_idmap(u64 addr) if (ret) goto unlock; - ret = host_stage2_try(__host_stage2_idmap, range.start, range.end, prot); + ret = host_stage2_idmap_locked(range.start, range.end, prot); unlock: hyp_spin_unlock(&host_kvm.lock);
--
2.32.0.432.gabb21c7263-goog
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