/*
|
* 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);
|
}
|
