Hi Marc,
-----Original Message-----
From: kvmarm-bounces@xxxxxxxxxxxxxxxxxxxxx <kvmarm-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Marc Zyngier
Sent: Thursday, August 6, 2020 1:57 AM
To: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Peng Hao <richard.peng@xxxxxxxx>; kernel-team@xxxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; Will Deacon <will@xxxxxxxxxx>; Catalin Marinas <Catalin.Marinas@xxxxxxx>; Alexander Graf <graf@xxxxxxxxxx>; kvmarm@xxxxxxxxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Subject: [PATCH 47/56] KVM: arm64: timers: Move timer registers to the sys_regs file
Move the timer gsisters to the sysreg file. This will further help when they are directly changed by a nesting hypervisor in the VNCR page.
This requires moving the initialisation of the timer struct so that some of the helpers (such as arch_timer_ctx_index) can work correctly at an early stage.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/include/asm/kvm_host.h | 6 ++
arch/arm64/kvm/arch_timer.c | 155 +++++++++++++++++++++++-------
arch/arm64/kvm/trace_arm.h | 8 +-
include/kvm/arm_arch_timer.h | 11 +--
4 files changed, 136 insertions(+), 44 deletions(-)
+static u64 timer_get_offset(struct arch_timer_context *ctxt) {
+ struct kvm_vcpu *vcpu = ctxt->vcpu;
+
+ switch(arch_timer_ctx_index(ctxt)) {
+ case TIMER_VTIMER:
+ return __vcpu_sys_reg(vcpu, CNTVOFF_EL2);
+ default:
+ return 0;
+ }
+}
+
Can I export this helper? As in my ptp_kvm implementation I need get VCNT offset value separately not just give me a result of VCNT.
Thanks
Jianyong
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