linux-kernel - [PATCH 41/43] KVM: VMX: Drop hv_timer_armed from 'struct loaded

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Date:   Thu, 13 Jun 2019 19:03:27 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        vkuznets@...hat.com
Subject: [PATCH 41/43] KVM: VMX: Drop hv_timer_armed from 'struct loaded_vmcs'

From: Sean Christopherson <sean.j.christopherson@...el.com>

... now that it is fully redundant with the pin controls shadow.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/vmx/nested.c | 1 -
 arch/x86/kvm/vmx/vmcs.h   | 1 -
 arch/x86/kvm/vmx/vmx.c    | 8 ++------
 3 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 598540ce0f52..33d6598709cb 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2015,7 +2015,6 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
 	exec_control |= vmcs12->pin_based_vm_exec_control;
 	/* Preemption timer setting is computed directly in vmx_vcpu_run.  */
 	exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER;
-	vmx->loaded_vmcs->hv_timer_armed = false;
 
 	/* Posted interrupts setting is only taken from vmcs12.  */
 	if (nested_cpu_has_posted_intr(vmcs12)) {
diff --git a/arch/x86/kvm/vmx/vmcs.h b/arch/x86/kvm/vmx/vmcs.h
index 52f12d78e4fa..9a87a2482e3e 100644
--- a/arch/x86/kvm/vmx/vmcs.h
+++ b/arch/x86/kvm/vmx/vmcs.h
@@ -61,7 +61,6 @@ struct loaded_vmcs {
 	int cpu;
 	bool launched;
 	bool nmi_known_unmasked;
-	bool hv_timer_armed;
 	/* Support for vnmi-less CPUs */
 	int soft_vnmi_blocked;
 	ktime_t entry_time;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 6afb2bc3d0ab..86f29ab22dec 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6359,9 +6359,7 @@ static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx)
 static void vmx_arm_hv_timer(struct vcpu_vmx *vmx, u32 val)
 {
 	vmcs_write32(VMX_PREEMPTION_TIMER_VALUE, val);
-	if (!vmx->loaded_vmcs->hv_timer_armed)
-		pin_controls_setbit(vmx, PIN_BASED_VMX_PREEMPTION_TIMER);
-	vmx->loaded_vmcs->hv_timer_armed = true;
+	pin_controls_setbit(vmx, PIN_BASED_VMX_PREEMPTION_TIMER);
 }
 
 static void vmx_update_hv_timer(struct kvm_vcpu *vcpu)
@@ -6388,9 +6386,7 @@ static void vmx_update_hv_timer(struct kvm_vcpu *vcpu)
 		return;
 	}
 
-	if (vmx->loaded_vmcs->hv_timer_armed)
-		pin_controls_clearbit(vmx, PIN_BASED_VMX_PREEMPTION_TIMER);
-	vmx->loaded_vmcs->hv_timer_armed = false;
+	pin_controls_clearbit(vmx, PIN_BASED_VMX_PREEMPTION_TIMER);
 }
 
 void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp)
-- 
1.8.3.1