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Subject[PATCH 01/40] KVM: SVM: Clean up VINTR setting
Date
From: Alexander Graf <agraf@suse.de>

The current VINTR intercept setters don't look clean to me. To make
the code easier to read and enable the possibilty to trap on a VINTR
set, this uses a helper function to set the VINTR intercept.

v2 uses two distinct functions for setting and clearing the bit

Acked-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/x86/kvm/svm.c | 20 +++++++++++++++-----
1 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index a9e769e..33407d9 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -718,6 +718,16 @@ static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
to_svm(vcpu)->vmcb->save.rflags = rflags;
}

+static void svm_set_vintr(struct vcpu_svm *svm)
+{
+ svm->vmcb->control.intercept |= 1ULL << INTERCEPT_VINTR;
+}
+
+static void svm_clear_vintr(struct vcpu_svm *svm)
+{
+ svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
+}
+
static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
{
struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
@@ -1380,7 +1390,7 @@ static int interrupt_window_interception(struct vcpu_svm *svm,
{
KVMTRACE_0D(PEND_INTR, &svm->vcpu, handler);

- svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
+ svm_clear_vintr(svm);
svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
/*
* If the user space waits to inject interrupts, exit as soon as
@@ -1593,7 +1603,7 @@ static void svm_intr_assist(struct kvm_vcpu *vcpu)
(vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) ||
(vmcb->control.event_inj & SVM_EVTINJ_VALID)) {
/* unable to deliver irq, set pending irq */
- vmcb->control.intercept |= (1ULL << INTERCEPT_VINTR);
+ svm_set_vintr(svm);
svm_inject_irq(svm, 0x0);
goto out;
}
@@ -1652,9 +1662,9 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
*/
if (!svm->vcpu.arch.interrupt_window_open &&
(svm->vcpu.arch.irq_summary || kvm_run->request_interrupt_window))
- control->intercept |= 1ULL << INTERCEPT_VINTR;
- else
- control->intercept &= ~(1ULL << INTERCEPT_VINTR);
+ svm_set_vintr(svm);
+ else
+ svm_clear_vintr(svm);
}

static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
--
1.6.0.6


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