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author | Marc Zyngier <marc.zyngier@arm.com> | 2016-01-28 14:48:42 +0000 |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 18:34:19 +0000 |
commit | 68130cb5db09cb8a285a59f70ac72d2bfa8685fd (patch) | |
tree | c4b52cdd9cd1f58d4efa90fc6ec858134d561c7b /arch/arm/kvm | |
parent | b5fa5d3e628bd301b89937ee4f7814297d8e2e31 (diff) | |
download | blackbird-op-linux-68130cb5db09cb8a285a59f70ac72d2bfa8685fd.tar.gz blackbird-op-linux-68130cb5db09cb8a285a59f70ac72d2bfa8685fd.zip |
ARM: KVM: Use common version of timer-sr.c
Using the common HYP timer code is a bit more tricky, since we
use system register names. Nothing a set of macros cannot
work around...
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm')
-rw-r--r-- | arch/arm/kvm/hyp/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/kvm/hyp/timer-sr.c | 69 |
2 files changed, 1 insertions, 70 deletions
diff --git a/arch/arm/kvm/hyp/Makefile b/arch/arm/kvm/hyp/Makefile index 8f735d970ef1..8dfa5f7f9290 100644 --- a/arch/arm/kvm/hyp/Makefile +++ b/arch/arm/kvm/hyp/Makefile @@ -5,10 +5,10 @@ KVM=../../../../virt/kvm obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/vgic-v2-sr.o +obj-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/hyp/timer-sr.o obj-$(CONFIG_KVM_ARM_HOST) += tlb.o obj-$(CONFIG_KVM_ARM_HOST) += cp15-sr.o -obj-$(CONFIG_KVM_ARM_HOST) += timer-sr.o obj-$(CONFIG_KVM_ARM_HOST) += vfp.o obj-$(CONFIG_KVM_ARM_HOST) += banked-sr.o obj-$(CONFIG_KVM_ARM_HOST) += entry.o diff --git a/arch/arm/kvm/hyp/timer-sr.c b/arch/arm/kvm/hyp/timer-sr.c deleted file mode 100644 index 2bb0c926e01c..000000000000 --- a/arch/arm/kvm/hyp/timer-sr.c +++ /dev/null @@ -1,69 +0,0 @@ -/* - * 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> - -/* vcpu is already in the HYP VA space */ -void __hyp_text __timer_save_state(struct kvm_vcpu *vcpu) -{ - struct kvm *kvm = kern_hyp_va(vcpu->kvm); - struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; - u64 val; - - if (kvm->arch.timer.enabled) { - timer->cntv_ctl = read_sysreg(CNTV_CTL); - timer->cntv_cval = read_sysreg(CNTV_CVAL); - } - - /* Disable the virtual timer */ - write_sysreg(0, CNTV_CTL); - - /* Allow physical timer/counter access for the host */ - val = read_sysreg(CNTHCTL); - val |= CNTHCTL_EL1PCTEN | CNTHCTL_EL1PCEN; - write_sysreg(val, CNTHCTL); - - /* Clear cntvoff for the host */ - write_sysreg(0, CNTVOFF); -} - -void __hyp_text __timer_restore_state(struct kvm_vcpu *vcpu) -{ - struct kvm *kvm = kern_hyp_va(vcpu->kvm); - struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; - u64 val; - - /* - * Disallow physical timer access for the guest - * Physical counter access is allowed - */ - val = read_sysreg(CNTHCTL); - val &= ~CNTHCTL_EL1PCEN; - val |= CNTHCTL_EL1PCTEN; - write_sysreg(val, CNTHCTL); - - if (kvm->arch.timer.enabled) { - write_sysreg(kvm->arch.timer.cntvoff, CNTVOFF); - write_sysreg(timer->cntv_cval, CNTV_CVAL); - isb(); - write_sysreg(timer->cntv_ctl, CNTV_CTL); - } -} |