diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 337d77d5fc23..7463d2cc435a 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -134,7 +134,7 @@ * 40 bits wide (T0SZ = 24). Systems with a PARange smaller than 40 bits are * not known to exist and will break with this configuration. * - * The VTCR_EL2 is configured per VM and is initialised in kvm_arm_setup_stage2(). + * The VTCR_EL2 is configured per VM and is initialised in kvm_init_stage2_mmu. * * Note that when using 4K pages, we concatenate two first level page tables * together. With 16K pages, we concatenate 16 first level page tables. diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 6c44cd50d078..4bb15b0768ea 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -829,8 +829,6 @@ int kvm_set_ipa_limit(void); struct kvm *kvm_arch_alloc_vm(void); void kvm_arch_free_vm(struct kvm *kvm); -int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type); - static inline bool kvm_vm_is_protected(struct kvm *kvm) { return false; diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 81839e9a8a24..0c2589513be3 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -161,7 +161,7 @@ int create_hyp_exec_mappings(phys_addr_t phys_addr, size_t size, void free_hyp_pgds(void); void stage2_unmap_vm(struct kvm *kvm); -int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu); +int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu, unsigned long type); void kvm_free_stage2_pgd(struct kvm_s2_mmu *mmu); int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, phys_addr_t pa, unsigned long size, bool writable); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index e7e4d7b6eabc..93d636a7be6e 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -139,17 +139,13 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) { int ret; - ret = kvm_arm_setup_stage2(kvm, type); - if (ret) - return ret; - - ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu); - if (ret) - return ret; - ret = kvm_share_hyp(kvm, kvm + 1); if (ret) - goto out_free_stage2_pgd; + return ret; + + ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu, type); + if (ret) + return ret; kvm_vgic_early_init(kvm); @@ -158,9 +154,6 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) set_default_spectre(kvm); - return ret; -out_free_stage2_pgd: - kvm_free_stage2_pgd(&kvm->arch.mmu); return ret; } diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index bda4d9eb7c68..6dfb254fd973 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -618,15 +618,40 @@ static struct kvm_pgtable_mm_ops kvm_s2_mm_ops = { * kvm_init_stage2_mmu - Initialise a S2 MMU strucrure * @kvm: The pointer to the KVM structure * @mmu: The pointer to the s2 MMU structure + * @type: The machine type of the virtual machine * * Allocates only the stage-2 HW PGD level table(s). * Note we don't need locking here as this is only called when the VM is * created, which can only be done once. */ -int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu) +int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu, unsigned long type) { + u32 kvm_ipa_limit = get_kvm_ipa_limit(); int cpu, err; struct kvm_pgtable *pgt; + u64 mmfr0, mmfr1; + u32 phys_shift; + + if (type & ~KVM_VM_TYPE_ARM_IPA_SIZE_MASK) + return -EINVAL; + + phys_shift = KVM_VM_TYPE_ARM_IPA_SIZE(type); + if (phys_shift) { + if (phys_shift > kvm_ipa_limit || + phys_shift < ARM64_MIN_PARANGE_BITS) + return -EINVAL; + } else { + phys_shift = KVM_PHYS_SHIFT; + if (phys_shift > kvm_ipa_limit) { + pr_warn_once("%s using unsupported default IPA limit, upgrade your VMM\n", + current->comm); + return -EINVAL; + } + } + + mmfr0 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1); + mmfr1 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); + kvm->arch.vtcr = kvm_get_vtcr(mmfr0, mmfr1, phys_shift); if (mmu->pgt != NULL) { kvm_err("kvm_arch already initialized?\n"); diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 32e07c68908c..0eee9ea0ab24 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -345,32 +345,3 @@ int kvm_set_ipa_limit(void) return 0; } - -int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type) -{ - u64 mmfr0, mmfr1; - u32 phys_shift; - - if (type & ~KVM_VM_TYPE_ARM_IPA_SIZE_MASK) - return -EINVAL; - - phys_shift = KVM_VM_TYPE_ARM_IPA_SIZE(type); - if (phys_shift) { - if (phys_shift > kvm_ipa_limit || - phys_shift < ARM64_MIN_PARANGE_BITS) - return -EINVAL; - } else { - phys_shift = KVM_PHYS_SHIFT; - if (phys_shift > kvm_ipa_limit) { - pr_warn_once("%s using unsupported default IPA limit, upgrade your VMM\n", - current->comm); - return -EINVAL; - } - } - - mmfr0 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1); - mmfr1 = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); - kvm->arch.vtcr = kvm_get_vtcr(mmfr0, mmfr1, phys_shift); - - return 0; -}