linux-kernel - [PATCH 13/46] KVM: VMX: Do not zero idt_vectoring_info in vmx_complete

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1242818323-10413-14-git-send-email-avi@redhat.com>
Date:	Wed, 20 May 2009 14:18:10 +0300
From:	Avi Kivity <avi@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	kvm@...r.kernel.org
Subject: [PATCH 13/46] KVM: VMX: Do not zero idt_vectoring_info in vmx_complete_interrupts().

From: Gleb Natapov <gleb@...hat.com>

We will need it later in task_switch().
Code in handle_exception() is dead. is_external_interrupt(vect_info)
will always be false since idt_vectoring_info is zeroed in
vmx_complete_interrupts().

Signed-off-by: Gleb Natapov <gleb@...hat.com>
Signed-off-by: Avi Kivity <avi@...hat.com>
---
 arch/x86/kvm/vmx.c |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 577aa95..e4ad9d3 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2626,11 +2626,6 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 		printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
 		       "intr info 0x%x\n", __func__, vect_info, intr_info);
 
-	if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) {
-		int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
-		kvm_push_irq(vcpu, irq);
-	}
-
 	if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
 		return 1;  /* already handled by vmx_vcpu_run() */
 
@@ -3329,11 +3324,9 @@ static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
 			kvm_queue_exception_e(&vmx->vcpu, vector, err);
 		} else
 			kvm_queue_exception(&vmx->vcpu, vector);
-		vmx->idt_vectoring_info = 0;
 		break;
 	case INTR_TYPE_EXT_INTR:
 		kvm_queue_interrupt(&vmx->vcpu, vector);
-		vmx->idt_vectoring_info = 0;
 		break;
 	default:
 		break;
-- 
1.6.0.6

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/