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From: "Michael S. Tsirkin" <mst@redhat.com>
To: x86@kernel.org, kvm@vger.kernel.org
Cc: Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Avi Kivity <avi@redhat.com>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	gleb@redhat.com, Linus Torvalds <torvalds@linux-foundation.org>,
	linux-kernel@vger.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCHv6 7/8] kvm: rearrange injection cancelling code
Date: Sun, 3 Jun 2012 10:28:35 +0300	[thread overview]
Message-ID: <ccea8fbf496a240b66d4b5bb2ccf75b6f7411bb4.1338474301.git.mst@redhat.com> (raw)
In-Reply-To: <cover.1338474301.git.mst@redhat.com>

Each time we need to cancel injection we invoke same code
(cancel_injection callback).  Move it towards the end of function using
the familiar goto on error pattern.

Will make it easier to do more cleanups for PV EOI.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 arch/x86/kvm/x86.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2f70861..67824f0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5296,8 +5296,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 
 	r = kvm_mmu_reload(vcpu);
 	if (unlikely(r)) {
-		kvm_x86_ops->cancel_injection(vcpu);
-		goto out;
+		goto cancel_injection;
 	}
 
 	preempt_disable();
@@ -5322,9 +5321,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		smp_wmb();
 		local_irq_enable();
 		preempt_enable();
-		kvm_x86_ops->cancel_injection(vcpu);
 		r = 1;
-		goto out;
+		goto cancel_injection;
 	}
 
 	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
@@ -5392,6 +5390,10 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 		kvm_lapic_sync_from_vapic(vcpu);
 
 	r = kvm_x86_ops->handle_exit(vcpu);
+	return r;
+
+cancel_injection:
+	kvm_x86_ops->cancel_injection(vcpu);
 out:
 	return r;
 }
-- 
MST


  parent reply	other threads:[~2012-06-03  7:29 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-03  7:27 [PATCHv6 0/8] kvm: eoi optimization support Michael S. Tsirkin
2012-06-03  7:27 ` [PATCHv6 1/8] kvm: document lapic regs field Michael S. Tsirkin
2012-06-03  7:27 ` [PATCHv6 2/8] kvm: optimize ISR lookups Michael S. Tsirkin
2012-06-12 21:08   ` Marcelo Tosatti
2012-06-13  9:02     ` Michael S. Tsirkin
2012-06-13  9:26       ` Michael S. Tsirkin
2012-06-13 20:21       ` Marcelo Tosatti
2012-06-03  7:28 ` [PATCHv6 3/8] kvm_para: guest side for eoi avoidance Michael S. Tsirkin
2012-06-03  7:28 ` [PATCHv6 4/8] x86/bitops: note on __test_and_clear_bit atomicity Michael S. Tsirkin
2012-06-03  7:28 ` [PATCHv6 5/8] kvm: eoi msi documentation Michael S. Tsirkin
2012-06-12 22:24   ` Marcelo Tosatti
2012-06-03  7:28 ` [PATCHv6 6/8] kvm: only sync when attention bits set Michael S. Tsirkin
2012-06-12 22:27   ` Marcelo Tosatti
2012-06-13  8:19     ` Michael S. Tsirkin
2012-06-13  8:35       ` Michael S. Tsirkin
2012-06-13 20:53         ` Marcelo Tosatti
2012-06-13 21:04           ` Michael S. Tsirkin
2012-06-13 23:38             ` Marcelo Tosatti
2012-06-14  8:04               ` Michael S. Tsirkin
2012-06-03  7:28 ` Michael S. Tsirkin [this message]
2012-06-03  7:28 ` [PATCHv6 8/8] kvm: host side for eoi optimization Michael S. Tsirkin
2012-06-13 21:10   ` Marcelo Tosatti
2012-06-14  8:01     ` Michael S. Tsirkin

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