/* * Copyright (C) 2012-2015 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.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/>. */ #include <clocksource/arm_arch_timer.h> #include <linux/compiler.h> #include <linux/kvm_host.h> #include <asm/kvm_hyp.h> void __hyp_text __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high) { u64 cntvoff = (u64)cntvoff_high << 32 | cntvoff_low; write_sysreg(cntvoff, cntvoff_el2); } /* * Should only be called on non-VHE systems. * VHE systems use EL2 timers and configure EL1 timers in kvm_timer_init_vhe(). */ void __hyp_text __timer_disable_traps(struct kvm_vcpu *vcpu) { u64 val; /* Allow physical timer/counter access for the host */ val = read_sysreg(cnthctl_el2); val |= CNTHCTL_EL1PCTEN | CNTHCTL_EL1PCEN; write_sysreg(val, cnthctl_el2); } /* * Should only be called on non-VHE systems. * VHE systems use EL2 timers and configure EL1 timers in kvm_timer_init_vhe(). */ void __hyp_text __timer_enable_traps(struct kvm_vcpu *vcpu) { u64 val; /* * Disallow physical timer access for the guest * Physical counter access is allowed */ val = read_sysreg(cnthctl_el2); val &= ~CNTHCTL_EL1PCEN; val |= CNTHCTL_EL1PCTEN; write_sysreg(val, cnthctl_el2); }