| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __ARM64_KVM_NESTED_H |
| #define __ARM64_KVM_NESTED_H |
| |
| #include <linux/bitfield.h> |
| #include <linux/kvm_host.h> |
| #include <asm/kvm_emulate.h> |
| |
| static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu) |
| { |
| return (!__is_defined(__KVM_NVHE_HYPERVISOR__) && |
| cpus_have_final_cap(ARM64_HAS_NESTED_VIRT) && |
| vcpu_has_feature(vcpu, KVM_ARM_VCPU_HAS_EL2)); |
| } |
| |
| /* Translation helpers from non-VHE EL2 to EL1 */ |
| static inline u64 tcr_el2_ps_to_tcr_el1_ips(u64 tcr_el2) |
| { |
| return (u64)FIELD_GET(TCR_EL2_PS_MASK, tcr_el2) << TCR_IPS_SHIFT; |
| } |
| |
| static inline u64 translate_tcr_el2_to_tcr_el1(u64 tcr) |
| { |
| return TCR_EPD1_MASK | /* disable TTBR1_EL1 */ |
| ((tcr & TCR_EL2_TBI) ? TCR_TBI0 : 0) | |
| tcr_el2_ps_to_tcr_el1_ips(tcr) | |
| (tcr & TCR_EL2_TG0_MASK) | |
| (tcr & TCR_EL2_ORGN0_MASK) | |
| (tcr & TCR_EL2_IRGN0_MASK) | |
| (tcr & TCR_EL2_T0SZ_MASK); |
| } |
| |
| static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2) |
| { |
| u64 cpacr_el1 = 0; |
| |
| if (cptr_el2 & CPTR_EL2_TTA) |
| cpacr_el1 |= CPACR_ELx_TTA; |
| if (!(cptr_el2 & CPTR_EL2_TFP)) |
| cpacr_el1 |= CPACR_ELx_FPEN; |
| if (!(cptr_el2 & CPTR_EL2_TZ)) |
| cpacr_el1 |= CPACR_ELx_ZEN; |
| |
| return cpacr_el1; |
| } |
| |
| static inline u64 translate_sctlr_el2_to_sctlr_el1(u64 val) |
| { |
| /* Only preserve the minimal set of bits we support */ |
| val &= (SCTLR_ELx_M | SCTLR_ELx_A | SCTLR_ELx_C | SCTLR_ELx_SA | |
| SCTLR_ELx_I | SCTLR_ELx_IESB | SCTLR_ELx_WXN | SCTLR_ELx_EE); |
| val |= SCTLR_EL1_RES1; |
| |
| return val; |
| } |
| |
| static inline u64 translate_ttbr0_el2_to_ttbr0_el1(u64 ttbr0) |
| { |
| /* Clear the ASID field */ |
| return ttbr0 & ~GENMASK_ULL(63, 48); |
| } |
| |
| extern bool forward_smc_trap(struct kvm_vcpu *vcpu); |
| |
| int kvm_init_nv_sysregs(struct kvm *kvm); |
| |
| #ifdef CONFIG_ARM64_PTR_AUTH |
| bool kvm_auth_eretax(struct kvm_vcpu *vcpu, u64 *elr); |
| #else |
| static inline bool kvm_auth_eretax(struct kvm_vcpu *vcpu, u64 *elr) |
| { |
| /* We really should never execute this... */ |
| WARN_ON_ONCE(1); |
| *elr = 0xbad9acc0debadbad; |
| return false; |
| } |
| #endif |
| |
| #endif /* __ARM64_KVM_NESTED_H */ |