Release 4.17 virt/kvm/arm/hyp/timer-sr.c

/*
 * 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoffer Dall
19
61.29%
1
33.33%
Marc Zyngier
11
35.48%
1
33.33%
Jintack Lim
1
3.23%
1
33.33%
Total
31
100.00%
3
100.00%

/*
 * 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Marc Zyngier
21
60.00%
1
25.00%
Christoffer Dall
12
34.29%
2
50.00%
Jintack Lim
2
5.71%
1
25.00%
Total
35
100.00%
4
100.00%

/*
 * 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);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Marc Zyngier
31
81.58%
1
25.00%
Christoffer Dall
6
15.79%
2
50.00%
Jintack Lim
1
2.63%
1
25.00%
Total
38
100.00%
4
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Marc Zyngier
76
63.87%
2
28.57%
Christoffer Dall
39
32.77%
3
42.86%
Jintack Lim
4
3.36%
2
28.57%
Total
119
100.00%
7
100.00%
Directory: virt/kvm/arm/hyp

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