caab277b1d
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
// 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 <marc.zyngier@arm.com>
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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 __hyp_text __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high)
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{
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u64 cntvoff = (u64)cntvoff_high << 32 | cntvoff_low;
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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 __hyp_text __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 __hyp_text __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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