Marc Zyngier | c76a0a6 | 2015-10-21 10:09:49 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 - ARM Ltd |
| 3 | * Author: Marc Zyngier <marc.zyngier@arm.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #ifndef __ARM64_KVM_HYP_H__ |
| 19 | #define __ARM64_KVM_HYP_H__ |
| 20 | |
| 21 | #include <linux/compiler.h> |
| 22 | #include <linux/kvm_host.h> |
| 23 | #include <asm/kvm_mmu.h> |
| 24 | #include <asm/sysreg.h> |
| 25 | |
| 26 | #define __hyp_text __section(.hyp.text) notrace |
| 27 | |
Marc Zyngier | cedbb8b7 | 2015-01-29 13:50:34 +0000 | [diff] [blame^] | 28 | static inline unsigned long __kern_hyp_va(unsigned long v) |
| 29 | { |
| 30 | asm volatile(ALTERNATIVE("and %0, %0, %1", |
| 31 | "nop", |
| 32 | ARM64_HAS_VIRT_HOST_EXTN) |
| 33 | : "+r" (v) : "i" (HYP_PAGE_OFFSET_MASK)); |
| 34 | return v; |
| 35 | } |
| 36 | |
| 37 | #define kern_hyp_va(v) (typeof(v))(__kern_hyp_va((unsigned long)(v))) |
| 38 | |
| 39 | static inline unsigned long __hyp_kern_va(unsigned long v) |
| 40 | { |
| 41 | u64 offset = PAGE_OFFSET - HYP_PAGE_OFFSET; |
| 42 | asm volatile(ALTERNATIVE("add %0, %0, %1", |
| 43 | "nop", |
| 44 | ARM64_HAS_VIRT_HOST_EXTN) |
| 45 | : "+r" (v) : "r" (offset)); |
| 46 | return v; |
| 47 | } |
| 48 | |
| 49 | #define hyp_kern_va(v) (typeof(v))(__hyp_kern_va((unsigned long)(v))) |
Marc Zyngier | c76a0a6 | 2015-10-21 10:09:49 +0100 | [diff] [blame] | 50 | |
Marc Zyngier | c1bf6e1 | 2015-10-28 08:45:37 +0000 | [diff] [blame] | 51 | /** |
| 52 | * hyp_alternate_select - Generates patchable code sequences that are |
| 53 | * used to switch between two implementations of a function, depending |
| 54 | * on the availability of a feature. |
| 55 | * |
| 56 | * @fname: a symbol name that will be defined as a function returning a |
| 57 | * function pointer whose type will match @orig and @alt |
| 58 | * @orig: A pointer to the default function, as returned by @fname when |
| 59 | * @cond doesn't hold |
| 60 | * @alt: A pointer to the alternate function, as returned by @fname |
| 61 | * when @cond holds |
| 62 | * @cond: a CPU feature (as described in asm/cpufeature.h) |
| 63 | */ |
| 64 | #define hyp_alternate_select(fname, orig, alt, cond) \ |
| 65 | typeof(orig) * __hyp_text fname(void) \ |
| 66 | { \ |
| 67 | typeof(alt) *val = orig; \ |
| 68 | asm volatile(ALTERNATIVE("nop \n", \ |
| 69 | "mov %0, %1 \n", \ |
| 70 | cond) \ |
| 71 | : "+r" (val) : "r" (alt)); \ |
| 72 | return val; \ |
| 73 | } |
| 74 | |
Marc Zyngier | 06282fd | 2015-10-19 15:50:37 +0100 | [diff] [blame] | 75 | void __vgic_v2_save_state(struct kvm_vcpu *vcpu); |
| 76 | void __vgic_v2_restore_state(struct kvm_vcpu *vcpu); |
| 77 | |
Marc Zyngier | f68d2b1 | 2015-10-19 15:50:58 +0100 | [diff] [blame] | 78 | void __vgic_v3_save_state(struct kvm_vcpu *vcpu); |
| 79 | void __vgic_v3_restore_state(struct kvm_vcpu *vcpu); |
| 80 | |
Marc Zyngier | 1431af3 | 2015-10-19 16:32:20 +0100 | [diff] [blame] | 81 | void __timer_save_state(struct kvm_vcpu *vcpu); |
| 82 | void __timer_restore_state(struct kvm_vcpu *vcpu); |
| 83 | |
Marc Zyngier | 6d6ec20 | 2015-10-19 18:02:48 +0100 | [diff] [blame] | 84 | void __sysreg_save_state(struct kvm_cpu_context *ctxt); |
| 85 | void __sysreg_restore_state(struct kvm_cpu_context *ctxt); |
Marc Zyngier | c209ec8 | 2015-10-19 19:28:29 +0100 | [diff] [blame] | 86 | void __sysreg32_save_state(struct kvm_vcpu *vcpu); |
| 87 | void __sysreg32_restore_state(struct kvm_vcpu *vcpu); |
Marc Zyngier | 6d6ec20 | 2015-10-19 18:02:48 +0100 | [diff] [blame] | 88 | |
Marc Zyngier | 8eb9926 | 2015-10-19 21:02:46 +0100 | [diff] [blame] | 89 | void __debug_save_state(struct kvm_vcpu *vcpu, |
| 90 | struct kvm_guest_debug_arch *dbg, |
| 91 | struct kvm_cpu_context *ctxt); |
| 92 | void __debug_restore_state(struct kvm_vcpu *vcpu, |
| 93 | struct kvm_guest_debug_arch *dbg, |
| 94 | struct kvm_cpu_context *ctxt); |
| 95 | void __debug_cond_save_host_state(struct kvm_vcpu *vcpu); |
| 96 | void __debug_cond_restore_host_state(struct kvm_vcpu *vcpu); |
| 97 | |
Marc Zyngier | c13d168 | 2015-10-26 08:34:09 +0000 | [diff] [blame] | 98 | void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); |
| 99 | void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); |
| 100 | static inline bool __fpsimd_enabled(void) |
| 101 | { |
| 102 | return !(read_sysreg(cptr_el2) & CPTR_EL2_TFP); |
| 103 | } |
| 104 | |
Marc Zyngier | b97b66c | 2015-10-22 08:32:18 +0100 | [diff] [blame] | 105 | u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt); |
Marc Zyngier | 53fd5b6 | 2015-10-25 15:21:52 +0000 | [diff] [blame] | 106 | void __noreturn __hyp_do_panic(unsigned long, ...); |
Marc Zyngier | b97b66c | 2015-10-22 08:32:18 +0100 | [diff] [blame] | 107 | |
Marc Zyngier | c76a0a6 | 2015-10-21 10:09:49 +0100 | [diff] [blame] | 108 | #endif /* __ARM64_KVM_HYP_H__ */ |
| 109 | |