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48 lines
1.1 KiB
48 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2012-2015 - ARM Ltd |
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* Author: Marc Zyngier <[email protected]> |
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*/ |
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#include <clocksource/arm_arch_timer.h> |
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#include <linux/compiler.h> |
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#include <linux/kvm_host.h> |
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#include <asm/kvm_hyp.h> |
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void __kvm_timer_set_cntvoff(u64 cntvoff) |
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{ |
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write_sysreg(cntvoff, cntvoff_el2); |
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} |
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/* |
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* Should only be called on non-VHE systems. |
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* VHE systems use EL2 timers and configure EL1 timers in kvm_timer_init_vhe(). |
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*/ |
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void __timer_disable_traps(struct kvm_vcpu *vcpu) |
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{ |
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u64 val; |
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/* Allow physical timer/counter access for the host */ |
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val = read_sysreg(cnthctl_el2); |
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val |= CNTHCTL_EL1PCTEN | CNTHCTL_EL1PCEN; |
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write_sysreg(val, cnthctl_el2); |
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} |
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/* |
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* Should only be called on non-VHE systems. |
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* VHE systems use EL2 timers and configure EL1 timers in kvm_timer_init_vhe(). |
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*/ |
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void __timer_enable_traps(struct kvm_vcpu *vcpu) |
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{ |
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u64 val; |
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/* |
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* Disallow physical timer access for the guest |
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* Physical counter access is allowed |
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*/ |
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val = read_sysreg(cnthctl_el2); |
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val &= ~CNTHCTL_EL1PCEN; |
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val |= CNTHCTL_EL1PCTEN; |
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write_sysreg(val, cnthctl_el2); |
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}
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