diff options
Diffstat (limited to 'arch/arm64/kvm/sys_regs.h')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.h | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h index 3b1bc7f01d0b..9bca0312d798 100644 --- a/arch/arm64/kvm/sys_regs.h +++ b/arch/arm64/kvm/sys_regs.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012,2013 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.com> @@ -5,18 +6,6 @@ * Derived from arch/arm/kvm/coproc.h * Copyright (C) 2012 - Virtual Open Systems and Columbia University * Authors: Christoffer Dall <c.dall@virtualopensystems.com> - * - * 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 <http://www.gnu.org/licenses/>. */ #ifndef __ARM64_KVM_SYS_REGS_LOCAL_H__ @@ -64,8 +53,15 @@ struct sys_reg_desc { const struct kvm_one_reg *reg, void __user *uaddr); int (*set_user)(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, const struct kvm_one_reg *reg, void __user *uaddr); + + /* Return mask of REG_* runtime visibility overrides */ + unsigned int (*visibility)(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *rd); }; +#define REG_HIDDEN_USER (1 << 0) /* hidden from userspace ioctls */ +#define REG_HIDDEN_GUEST (1 << 1) /* hidden from guest */ + static inline void print_sys_reg_instr(const struct sys_reg_params *p) { /* Look, we even formatted it for you to paste into the table! */ @@ -102,6 +98,24 @@ static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r __vcpu_sys_reg(vcpu, r->reg) = r->val; } +static inline bool sysreg_hidden_from_guest(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *r) +{ + if (likely(!r->visibility)) + return false; + + return r->visibility(vcpu, r) & REG_HIDDEN_GUEST; +} + +static inline bool sysreg_hidden_from_user(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *r) +{ + if (likely(!r->visibility)) + return false; + + return r->visibility(vcpu, r) & REG_HIDDEN_USER; +} + static inline int cmp_sys_reg(const struct sys_reg_desc *i1, const struct sys_reg_desc *i2) { |