/* * Copyright (C) 2015 - ARM Ltd * Author: Marc Zyngier * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #ifndef __ARM64_KVM_HYP_H__ #define __ARM64_KVM_HYP_H__ #include #include #include #include #define __hyp_text __section(.hyp.text) notrace #define read_sysreg_elx(r,nvh,vh) \ ({ \ u64 reg; \ asm volatile(ALTERNATIVE("mrs %0, " __stringify(r##nvh),\ "mrs_s %0, " __stringify(r##vh),\ ARM64_HAS_VIRT_HOST_EXTN) \ : "=r" (reg)); \ reg; \ }) #define write_sysreg_elx(v,r,nvh,vh) \ do { \ u64 __val = (u64)(v); \ asm volatile(ALTERNATIVE("msr " __stringify(r##nvh) ", %x0",\ "msr_s " __stringify(r##vh) ", %x0",\ ARM64_HAS_VIRT_HOST_EXTN) \ : : "rZ" (__val)); \ } while (0) /* * Unified accessors for registers that have a different encoding * between VHE and non-VHE. They must be specified without their "ELx" * encoding. */ #define read_sysreg_el2(r) \ ({ \ u64 reg; \ asm volatile(ALTERNATIVE("mrs %0, " __stringify(r##_EL2),\ "mrs %0, " __stringify(r##_EL1),\ ARM64_HAS_VIRT_HOST_EXTN) \ : "=r" (reg)); \ reg; \ }) #define write_sysreg_el2(v,r) \ do { \ u64 __val = (u64)(v); \ asm volatile(ALTERNATIVE("msr " __stringify(r##_EL2) ", %x0",\ "msr " __stringify(r##_EL1) ", %x0",\ ARM64_HAS_VIRT_HOST_EXTN) \ : : "rZ" (__val)); \ } while (0) #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) /* The VHE specific system registers and their encoding */ #define sctlr_EL12 sys_reg(3, 5, 1, 0, 0) #define cpacr_EL12 sys_reg(3, 5, 1, 0, 2) #define ttbr0_EL12 sys_reg(3, 5, 2, 0, 0) #define ttbr1_EL12 sys_reg(3, 5, 2, 0, 1) #define tcr_EL12 sys_reg(3, 5, 2, 0, 2) #define afsr0_EL12 sys_reg(3, 5, 5, 1, 0) #define afsr1_EL12 sys_reg(3, 5, 5, 1, 1) #define esr_EL12 sys_reg(3, 5, 5, 2, 0) #define far_EL12 sys_reg(3, 5, 6, 0, 0) #define mair_EL12 sys_reg(3, 5, 10, 2, 0) #define amair_EL12 sys_reg(3, 5, 10, 3, 0) #define vbar_EL12 sys_reg(3, 5, 12, 0, 0) #define contextidr_EL12 sys_reg(3, 5, 13, 0, 1) #define cntkctl_EL12 sys_reg(3, 5, 14, 1, 0) #define cntp_tval_EL02 sys_reg(3, 5, 14, 2, 0) #define cntp_ctl_EL02 sys_reg(3, 5, 14, 2, 1) #define cntp_cval_EL02 sys_reg(3, 5, 14, 2, 2) #define cntv_tval_EL02 sys_reg(3, 5, 14, 3, 0) #define cntv_ctl_EL02 sys_reg(3, 5, 14, 3, 1) #define cntv_cval_EL02 sys_reg(3, 5, 14, 3, 2) #define spsr_EL12 sys_reg(3, 5, 4, 0, 0) #define elr_EL12 sys_reg(3, 5, 4, 0, 1) /** * hyp_alternate_select - Generates patchable code sequences that are * used to switch between two implementations of a function, depending * on the availability of a feature. * * @fname: a symbol name that will be defined as a function returning a * function pointer whose type will match @orig and @alt * @orig: A pointer to the default function, as returned by @fname when * @cond doesn't hold * @alt: A pointer to the alternate function, as returned by @fname * when @cond holds * @cond: a CPU feature (as described in asm/cpufeature.h) */ #define hyp_alternate_select(fname, orig, alt, cond) \ typeof(orig) * __hyp_text fname(void) \ { \ typeof(alt) *val = orig; \ asm volatile(ALTERNATIVE("nop \n", \ "mov %0, %1 \n", \ cond) \ : "+r" (val) : "r" (alt)); \ return val; \ } void __vgic_v2_save_state(struct kvm_vcpu *vcpu); void __vgic_v2_restore_state(struct kvm_vcpu *vcpu); bool __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); void __vgic_v3_save_state(struct kvm_vcpu *vcpu); void __vgic_v3_restore_state(struct kvm_vcpu *vcpu); void __timer_save_state(struct kvm_vcpu *vcpu); void __timer_restore_state(struct kvm_vcpu *vcpu); void __sysreg_save_host_state(struct kvm_cpu_context *ctxt); void __sysreg_restore_host_state(struct kvm_cpu_context *ctxt); void __sysreg_save_guest_state(struct kvm_cpu_context *ctxt); void __sysreg_restore_guest_state(struct kvm_cpu_context *ctxt); void __sysreg32_save_state(struct kvm_vcpu *vcpu); void __sysreg32_restore_state(struct kvm_vcpu *vcpu); void __debug_save_state(struct kvm_vcpu *vcpu, struct kvm_guest_debug_arch *dbg, struct kvm_cpu_context *ctxt); void __debug_restore_state(struct kvm_vcpu *vcpu, struct kvm_guest_debug_arch *dbg, struct kvm_cpu_context *ctxt); void __debug_cond_save_host_state(struct kvm_vcpu *vcpu); void __debug_cond_restore_host_state(struct kvm_vcpu *vcpu); void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); bool __fpsimd_enabled(void); u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt); void __noreturn __hyp_do_panic(unsigned long, ...); #endif /* __ARM64_KVM_HYP_H__ */