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From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: avi@redhat.com, mtosatti@redhat.com, jan.kiszka@siemens.com,
	kvm@vger.kernel.org
Subject: [PATCH 3/3] apic: always update the in-kernel status after loading
Date: Tue, 30 Oct 2012 13:16:32 +0100	[thread overview]
Message-ID: <1351599394-24876-4-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1351599394-24876-1-git-send-email-pbonzini@redhat.com>

The LAPIC is loaded separately from the rest of the VCPU state.  Thus,
when restoring the CPU the dummy post-reset state is passed to the
in-kernel APIC.

This can cause MSI injection to fail if attempted during the restore of
another device, because the LAPIC believes it's not enabled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/apic_common.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/hw/apic_common.c b/hw/apic_common.c
index f373ba8..1ef52b2 100644
--- a/hw/apic_common.c
+++ b/hw/apic_common.c
@@ -362,6 +362,7 @@ static int apic_dispatch_post_load(void *opaque, int version_id)
     if (info->post_load) {
         info->post_load(s);
     }
+    cpu_put_apic_state(DEVICE(s));
     return 0;
 }
 
-- 
1.7.1



WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: jan.kiszka@siemens.com, mtosatti@redhat.com, avi@redhat.com,
	kvm@vger.kernel.org
Subject: [Qemu-devel] [PATCH 3/3] apic: always update the in-kernel status after loading
Date: Tue, 30 Oct 2012 13:16:32 +0100	[thread overview]
Message-ID: <1351599394-24876-4-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1351599394-24876-1-git-send-email-pbonzini@redhat.com>

The LAPIC is loaded separately from the rest of the VCPU state.  Thus,
when restoring the CPU the dummy post-reset state is passed to the
in-kernel APIC.

This can cause MSI injection to fail if attempted during the restore of
another device, because the LAPIC believes it's not enabled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/apic_common.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/hw/apic_common.c b/hw/apic_common.c
index f373ba8..1ef52b2 100644
--- a/hw/apic_common.c
+++ b/hw/apic_common.c
@@ -362,6 +362,7 @@ static int apic_dispatch_post_load(void *opaque, int version_id)
     if (info->post_load) {
         info->post_load(s);
     }
+    cpu_put_apic_state(DEVICE(s));
     return 0;
 }
 
-- 
1.7.1

  parent reply	other threads:[~2012-10-30 12:16 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-30 12:16 [PATCH uq/master 0/3] Fix MSI injection at load time Paolo Bonzini
2012-10-30 12:16 ` [Qemu-devel] " Paolo Bonzini
2012-10-30 12:16 ` [PATCH 1/3] kvm: move KVM_GET_LAPIC/KVM_SET_LAPIC to hw/kvm/apic.c Paolo Bonzini
2012-10-30 12:16   ` [Qemu-devel] " Paolo Bonzini
2012-10-30 18:13   ` Jan Kiszka
2012-10-30 18:13     ` [Qemu-devel] " Jan Kiszka
2012-10-30 12:16 ` [PATCH 2/3] apic: add get/put methods Paolo Bonzini
2012-10-30 12:16   ` [Qemu-devel] " Paolo Bonzini
2012-10-30 18:17   ` Jan Kiszka
2012-10-30 18:17     ` [Qemu-devel] " Jan Kiszka
2012-10-30 12:16 ` Paolo Bonzini [this message]
2012-10-30 12:16   ` [Qemu-devel] [PATCH 3/3] apic: always update the in-kernel status after loading Paolo Bonzini
2012-10-30 12:38   ` Avi Kivity
2012-10-30 12:38     ` [Qemu-devel] " Avi Kivity
2012-10-30 14:16     ` Paolo Bonzini
2012-10-30 14:16       ` [Qemu-devel] " Paolo Bonzini
2012-10-30 18:21       ` Jan Kiszka
2012-10-30 18:21         ` [Qemu-devel] " Jan Kiszka
2012-11-02 14:53         ` Paolo Bonzini
2012-11-02 14:53           ` [Qemu-devel] " Paolo Bonzini
2012-11-02 14:59           ` Jan Kiszka
2012-11-02 14:59             ` [Qemu-devel] " Jan Kiszka
2012-11-02 15:07             ` Gerd Hoffmann
2012-11-02 15:07               ` [Qemu-devel] " Gerd Hoffmann
2012-11-02 15:13               ` Paolo Bonzini
2012-11-02 15:13                 ` [Qemu-devel] " Paolo Bonzini
2012-11-02 15:17                 ` Gerd Hoffmann
2012-11-02 15:17                   ` [Qemu-devel] " Gerd Hoffmann
2012-11-02 15:21                   ` Paolo Bonzini
2012-11-02 15:21                     ` [Qemu-devel] " Paolo Bonzini
2012-10-30 18:17   ` Jan Kiszka
2012-10-30 18:17     ` [Qemu-devel] " Jan Kiszka
2012-10-30 12:16 ` [PATCH 4/3] ioapic: change pre_save/post_load methods to get/put Paolo Bonzini
2012-10-30 12:16   ` [Qemu-devel] " Paolo Bonzini
2012-10-30 18:18   ` Jan Kiszka
2012-10-30 18:18     ` [Qemu-devel] " Jan Kiszka
2012-10-30 12:16 ` [PATCH 5/3] ioapic: unify reset callbacks Paolo Bonzini
2012-10-30 12:16   ` [Qemu-devel] " Paolo Bonzini
2012-10-30 16:47 ` [PATCH uq/master 0/3] Fix MSI injection at load time Paolo Bonzini
2012-10-30 16:47   ` [Qemu-devel] " Paolo Bonzini
2012-10-30 18:22   ` Jan Kiszka
2012-10-30 18:22     ` [Qemu-devel] " Jan Kiszka

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