From 2b4825a8694018901e641ccc2eafd0fff58d1415 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 30 Mar 2023 18:47:44 +0100 Subject: KVM: arm64: timers: Use CNTPOFF_EL2 to offset the physical timer With ECV and CNTPOFF_EL2, it is very easy to offer an offset for the physical timer. So let's do just that. Nothing can set the offset yet, so this should have no effect whatsoever (famous last words...). Reviewed-by: Colton Lewis Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20230330174800.2677007-5-maz@kernel.org --- include/clocksource/arm_arch_timer.h | 1 + include/kvm/arm_arch_timer.h | 2 ++ 2 files changed, 3 insertions(+) (limited to 'include') diff --git a/include/clocksource/arm_arch_timer.h b/include/clocksource/arm_arch_timer.h index 057c8964aefb..cbbc9a6dc571 100644 --- a/include/clocksource/arm_arch_timer.h +++ b/include/clocksource/arm_arch_timer.h @@ -21,6 +21,7 @@ #define CNTHCTL_EVNTEN (1 << 2) #define CNTHCTL_EVNTDIR (1 << 3) #define CNTHCTL_EVNTI (0xF << 4) +#define CNTHCTL_ECV (1 << 12) enum arch_timer_reg { ARCH_TIMER_REG_CTRL, diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h index 70d47c4adc6a..2dd0fd2406fb 100644 --- a/include/kvm/arm_arch_timer.h +++ b/include/kvm/arm_arch_timer.h @@ -34,6 +34,8 @@ struct arch_timer_offset { struct arch_timer_vm_data { /* Offset applied to the virtual timer/counter */ u64 voffset; + /* Offset applied to the physical timer/counter */ + u64 poffset; }; struct arch_timer_context { -- cgit v1.2.3