lkml.org 
[lkml]   [2013]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH RFC V11 16/18] kvm hypervisor : Simplify kvm_for_each_vcpu with kvm_irq_delivery_to_apic
kvm hypervisor: Simplify kvm_for_each_vcpu with kvm_irq_delivery_to_apic

From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>

Note that we are using APIC_DM_REMRD which has reserved usage.
In future if APIC_DM_REMRD usage is standardized, then we should
find some other way or go back to old method.

Suggested-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
---
arch/x86/kvm/lapic.c | 5 ++++-
arch/x86/kvm/x86.c | 25 ++++++-------------------
2 files changed, 10 insertions(+), 20 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index afc1124..48c13c9 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -706,7 +706,10 @@ out:
break;

case APIC_DM_REMRD:
- apic_debug("Ignoring delivery mode 3\n");
+ result = 1;
+ vcpu->arch.pv.pv_unhalted = 1;
+ kvm_make_request(KVM_REQ_EVENT, vcpu);
+ kvm_vcpu_kick(vcpu);
break;

case APIC_DM_SMI:
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1e73dab..640d112 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5502,27 +5502,14 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
*/
static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid)
{
- struct kvm_vcpu *vcpu = NULL;
- int i;
+ struct kvm_lapic_irq lapic_irq;

- kvm_for_each_vcpu(i, vcpu, kvm) {
- if (!kvm_apic_present(vcpu))
- continue;
+ lapic_irq.shorthand = 0;
+ lapic_irq.dest_mode = 0;
+ lapic_irq.dest_id = apicid;

- if (kvm_apic_match_dest(vcpu, 0, 0, apicid, 0))
- break;
- }
- if (vcpu) {
- /*
- * Setting unhalt flag here can result in spurious runnable
- * state when unhalt reset does not happen in vcpu_block.
- * But that is harmless since that should soon result in halt.
- */
- vcpu->arch.pv.pv_unhalted = true;
- /* We need everybody see unhalt before vcpu unblocks */
- smp_wmb();
- kvm_vcpu_kick(vcpu);
- }
+ lapic_irq.delivery_mode = APIC_DM_REMRD;
+ kvm_irq_delivery_to_apic(kvm, 0, &lapic_irq, NULL);
}

int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)


\
 
 \ /
  Last update: 2013-07-22 09:01    [W:0.091 / U:1.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site