linux-kernel - [PATCH 04/31] KVM: x86: Switch to use hrtimer

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Message-Id: <8774212e6c10c550743219e00738492eb379227c.1729864823.git.namcao@linutronix.de>
Date: Mon, 28 Oct 2024 08:31:37 +0100
From: Nam Cao <namcao@...utronix.de>
To: Anna-Maria Behnsen <anna-maria@...utronix.de>,
	Frederic Weisbecker <frederic@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Kees Cook <kees@...nel.org>,
	linux-kernel@...r.kernel.org
Cc: Nam Cao <namcao@...utronix.de>,
	Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH 04/31] KVM: x86: Switch to use hrtimer_setup()

There is a newly introduced hrtimer_setup() which will replace
hrtimer_init(). This new function is similar to the old one, except that it
also sanity-checks and initializes the timer's callback function.

Switch to use this new function.

Patch was created by using Coccinelle.

Signed-off-by: Nam Cao <namcao@...utronix.de>
---
Cc: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/hyperv.c     | 3 +--
 arch/x86/kvm/i8254.c      | 3 +--
 arch/x86/kvm/lapic.c      | 5 ++---
 arch/x86/kvm/vmx/nested.c | 5 ++---
 arch/x86/kvm/xen.c        | 5 ++---
 5 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 4f0a94346d00..19ea425a7264 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -952,8 +952,7 @@ static void stimer_init(struct kvm_vcpu_hv_stimer *stimer, int timer_index)
 {
 	memset(stimer, 0, sizeof(*stimer));
 	stimer->index = timer_index;
-	hrtimer_init(&stimer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
-	stimer->timer.function = stimer_timer_callback;
+	hrtimer_setup(&stimer->timer, stimer_timer_callback, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 	stimer_prepare_msg(stimer);
 }
 
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index cd57a517d04a..9342442e9650 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -690,8 +690,7 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
 	pit->kvm = kvm;
 
 	pit_state = &pit->pit_state;
-	hrtimer_init(&pit_state->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
-	pit_state->timer.function = pit_timer_fn;
+	hrtimer_setup(&pit_state->timer, pit_timer_fn, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
 
 	pit_state->irq_ack_notifier.gsi = 0;
 	pit_state->irq_ack_notifier.irq_acked = kvm_pit_ack_irq;
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 2098dc689088..1cfcd9125ffb 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2887,9 +2887,8 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
 
 	apic->nr_lvt_entries = kvm_apic_calc_nr_lvt_entries(vcpu);
 
-	hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
-		     HRTIMER_MODE_ABS_HARD);
-	apic->lapic_timer.timer.function = apic_timer_fn;
+	hrtimer_setup(&apic->lapic_timer.timer, apic_timer_fn, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_ABS_HARD);
 	if (lapic_timer_advance)
 		apic->lapic_timer.timer_advance_ns = LAPIC_TIMER_ADVANCE_NS_INIT;
 
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index a8e7bc04d9bf..c8cdf2ef00aa 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -5279,9 +5279,8 @@ static int enter_vmx_operation(struct kvm_vcpu *vcpu)
 	if (enable_shadow_vmcs && !alloc_shadow_vmcs(vcpu))
 		goto out_shadow_vmcs;
 
-	hrtimer_init(&vmx->nested.preemption_timer, CLOCK_MONOTONIC,
-		     HRTIMER_MODE_ABS_PINNED);
-	vmx->nested.preemption_timer.function = vmx_preemption_timer_fn;
+	hrtimer_setup(&vmx->nested.preemption_timer, vmx_preemption_timer_fn, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_ABS_PINNED);
 
 	vmx->nested.vpid02 = allocate_vpid();
 
diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c
index c386fbe6b58d..73e85b1ebb08 100644
--- a/arch/x86/kvm/xen.c
+++ b/arch/x86/kvm/xen.c
@@ -265,9 +265,8 @@ static void kvm_xen_stop_timer(struct kvm_vcpu *vcpu)
 
 static void kvm_xen_init_timer(struct kvm_vcpu *vcpu)
 {
-	hrtimer_init(&vcpu->arch.xen.timer, CLOCK_MONOTONIC,
-		     HRTIMER_MODE_ABS_HARD);
-	vcpu->arch.xen.timer.function = xen_timer_callback;
+	hrtimer_setup(&vcpu->arch.xen.timer, xen_timer_callback, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_ABS_HARD);
 }
 
 static void kvm_xen_update_runstate_guest(struct kvm_vcpu *v, bool atomic)
-- 
2.39.5