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It will be called later from the fault handling path. Tested-by: Fuad Tabba Reviewed-by: Fuad Tabba Signed-off-by: Quentin Perret --- arch/arm64/include/asm/kvm_asm.h | 1 + arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 1 + arch/arm64/kvm/hyp/nvhe/hyp-main.c | 19 ++++++++++++++++++ arch/arm64/kvm/hyp/nvhe/mem_protect.c | 20 +++++++++++++++++++ 4 files changed, 41 insertions(+) diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_= asm.h index 4f97155d6323..a3b07db2776c 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -70,6 +70,7 @@ enum __kvm_host_smccc_func { __KVM_HOST_SMCCC_FUNC___pkvm_host_relax_perms_guest, __KVM_HOST_SMCCC_FUNC___pkvm_host_wrprotect_guest, __KVM_HOST_SMCCC_FUNC___pkvm_host_test_clear_young_guest, + __KVM_HOST_SMCCC_FUNC___pkvm_host_mkyoung_guest, __KVM_HOST_SMCCC_FUNC___kvm_adjust_pc, __KVM_HOST_SMCCC_FUNC___kvm_vcpu_run, __KVM_HOST_SMCCC_FUNC___kvm_flush_vm_context, diff --git a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h b/arch/arm64/kvm= /hyp/include/nvhe/mem_protect.h index 74bd6c72fff2..978f38c386ee 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h +++ b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h @@ -45,6 +45,7 @@ int __pkvm_host_unshare_guest(u64 gfn, struct pkvm_hyp_vm= *hyp_vm); int __pkvm_host_relax_perms_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu, enu= m kvm_pgtable_prot prot); int __pkvm_host_wrprotect_guest(u64 gfn, struct pkvm_hyp_vm *hyp_vm); int __pkvm_host_test_clear_young_guest(u64 gfn, bool mkold, struct pkvm_hy= p_vm *vm); +int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu); =20 bool addr_is_memory(phys_addr_t phys); int host_stage2_idmap_locked(phys_addr_t addr, u64 size, enum kvm_pgtable_= prot prot); diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-main.c b/arch/arm64/kvm/hyp/nvhe/h= yp-main.c index 616e172a9c48..32c4627b5b5b 100644 --- a/arch/arm64/kvm/hyp/nvhe/hyp-main.c +++ b/arch/arm64/kvm/hyp/nvhe/hyp-main.c @@ -324,6 +324,24 @@ static void handle___pkvm_host_test_clear_young_guest(= struct kvm_cpu_context *ho cpu_reg(host_ctxt, 1) =3D ret; } =20 +static void handle___pkvm_host_mkyoung_guest(struct kvm_cpu_context *host_= ctxt) +{ + DECLARE_REG(u64, gfn, host_ctxt, 1); + struct pkvm_hyp_vcpu *hyp_vcpu; + int ret =3D -EINVAL; + + if (!is_protected_kvm_enabled()) + goto out; + + hyp_vcpu =3D pkvm_get_loaded_hyp_vcpu(); + if (!hyp_vcpu || pkvm_hyp_vcpu_is_protected(hyp_vcpu)) + goto out; + + ret =3D __pkvm_host_mkyoung_guest(gfn, hyp_vcpu); +out: + cpu_reg(host_ctxt, 1) =3D ret; +} + static void handle___kvm_adjust_pc(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_vcpu *, vcpu, host_ctxt, 1); @@ -538,6 +556,7 @@ static const hcall_t host_hcall[] =3D { HANDLE_FUNC(__pkvm_host_relax_perms_guest), HANDLE_FUNC(__pkvm_host_wrprotect_guest), HANDLE_FUNC(__pkvm_host_test_clear_young_guest), + HANDLE_FUNC(__pkvm_host_mkyoung_guest), HANDLE_FUNC(__kvm_adjust_pc), HANDLE_FUNC(__kvm_vcpu_run), HANDLE_FUNC(__kvm_flush_vm_context), diff --git a/arch/arm64/kvm/hyp/nvhe/mem_protect.c b/arch/arm64/kvm/hyp/nvh= e/mem_protect.c index 0e42c3baaf4b..eae03509d371 100644 --- a/arch/arm64/kvm/hyp/nvhe/mem_protect.c +++ b/arch/arm64/kvm/hyp/nvhe/mem_protect.c @@ -1549,3 +1549,23 @@ int __pkvm_host_test_clear_young_guest(u64 gfn, bool= mkold, struct pkvm_hyp_vm * =20 return ret; } + +int __pkvm_host_mkyoung_guest(u64 gfn, struct pkvm_hyp_vcpu *vcpu) +{ + struct pkvm_hyp_vm *vm =3D pkvm_hyp_vcpu_to_hyp_vm(vcpu); + u64 ipa =3D hyp_pfn_to_phys(gfn); + u64 phys; + int ret; + + host_lock_component(); + guest_lock_component(vm); + + ret =3D __check_host_shared_guest(vm, &phys, ipa); + if (!ret) + kvm_pgtable_stage2_mkyoung(&vm->pgt, ipa, 0); + + guest_unlock_component(vm); + host_unlock_component(); + + return ret; +} --=20 2.47.1.613.gc27f4b7a9f-goog