On 2020-08-19 10:24, Jianyong Wu wrote:
Hi Marc,
-----Original Message-----
From: [email protected]
<[email protected]> On Behalf Of Marc Zyngier
Sent: Thursday, August 6, 2020 1:57 AM
To: Paolo Bonzini <[email protected]>
Cc: Peng Hao <[email protected]>; [email protected];
[email protected]; Will Deacon <[email protected]>; Catalin Marinas
<[email protected]>; Alexander Graf <[email protected]>;
[email protected]; [email protected]
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 <[email protected]>
---
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.
Sorry, you need to give me a bit more context. What do you need
the offset for exactly?
M.
--
Jazz is not dead. It just smells funny...
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