[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1453254177-103002-2-git-send-email-feng.wu@intel.com>
Date: Wed, 20 Jan 2016 09:42:54 +0800
From: Feng Wu <feng.wu@...el.com>
To: pbonzini@...hat.com, rkrcmar@...hat.com
Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
Feng Wu <feng.wu@...el.com>
Subject: [PATCH v3 1/4] KVM: Recover IRTE to remapped mode if the interrupt is not single-destination
When the interrupt is not single destination any more, we need
to change back IRTE to remapped mode explicitly.
Signed-off-by: Feng Wu <feng.wu@...el.com>
---
arch/x86/kvm/vmx.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e2951b6..13d14d4 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -10764,8 +10764,17 @@ static int vmx_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
*/
kvm_set_msi_irq(e, &irq);
- if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu))
+ if (!kvm_intr_is_single_vcpu(kvm, &irq, &vcpu)) {
+ /*
+ * Make sure the IRTE is in remapped mode if
+ * we don't handle it in posted mode.
+ */
+ pi_set_sn(vcpu_to_pi_desc(vcpu));
+ ret = irq_set_vcpu_affinity(host_irq, NULL);
+ pi_clear_sn(vcpu_to_pi_desc(vcpu));
+
continue;
+ }
vcpu_info.pi_desc_addr = __pa(vcpu_to_pi_desc(vcpu));
vcpu_info.vector = irq.vector;
--
2.1.0
Powered by blists - more mailing lists