Release 4.16 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%



void __hyp_text __timer_disable_traps(struct kvm_vcpu *vcpu)
{
	/*
         * We don't need to do this for VHE since the host kernel runs in EL2
         * with HCR_EL2.TGE ==1, which makes those bits have no impact.
         */
	if (!has_vhe()) {
		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
Christoffer Dall
21
47.73%
2
50.00%
Marc Zyngier
21
47.73%
1
25.00%
Jintack Lim
2
4.55%
1
25.00%
Total
44
100.00%
4
100.00%



void __hyp_text __timer_enable_traps(struct kvm_vcpu *vcpu)
{
	if (!has_vhe()) {
		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
32
69.57%
1
33.33%
Christoffer Dall
13
28.26%
1
33.33%
Jintack Lim
1
2.17%
1
33.33%
Total
46
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Marc Zyngier
77
57.46%
2
33.33%
Christoffer Dall
53
39.55%
2
33.33%
Jintack Lim
4
2.99%
2
33.33%
Total
134
100.00%
6
100.00%
Directory: virt/kvm/arm/hyp

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