[PATCH 2/9] Clean up VINTR setting v2

Alexander Graf
2008-09-05T07:51:27Z

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

Signed-off-by: Alexander Graf <agraf@suse.de>
---
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 961dc3b..d9b18cc 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -729,6 +729,16 @@ 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;
@@ -1363,7 +1373,7 @@ 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
@@ -1575,7 +1585,7 @@ 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;
}
@@ -1635,9 +1645,9 @@ 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)
--
1.5.6