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qemu-kvm/SOURCES/kvm-vfio-pci-Call-vfio_prep...

68 lines
2.5 KiB

From b5a69101abac153c9c9be7f539d810e3e4af3bdf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= <clg@redhat.com>
Date: Wed, 12 Jul 2023 17:46:57 +0200
Subject: [PATCH 19/37] vfio/pci: Call vfio_prepare_kvm_msi_virq_batch() in MSI
retry path
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 179: vfio: live migration support
RH-Bugzilla: 2192818
RH-Acked-by: Eric Auger <eric.auger@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [17/28] 2067bb58f3a2c1a793e5566cee3c78a8299c9c1c (clegoate/qemu-kvm-c9s)
Bugzilla: https://bugzilla.redhat.com/2192818
commit c17408892319
Author: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Date: Tue Jun 13 15:09:43 2023 +0100
vfio/pci: Call vfio_prepare_kvm_msi_virq_batch() in MSI retry path
When vfio_enable_vectors() returns with less than requested nr_vectors
we retry with what kernel reported back. But the retry path doesn't
call vfio_prepare_kvm_msi_virq_batch() and this results in,
qemu-system-aarch64: vfio: Error: Failed to enable 4 MSI vectors, retry with 1
qemu-system-aarch64: ../hw/vfio/pci.c:602: vfio_commit_kvm_msi_virq_batch: Assertion `vdev->defer_kvm_irq_routing' failed
Fixes: dc580d51f7dd ("vfio: defer to commit kvm irq routing when enable msi/msix")
Reviewed-by: Longpeng <longpeng2@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/vfio/pci.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 7c5e2b5996..15e7554954 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -666,6 +666,8 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev)
vfio_disable_interrupts(vdev);
+ vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
+retry:
/*
* Setting vector notifiers needs to enable route for each vector.
* Deferring to commit the KVM routes once rather than per vector
@@ -673,8 +675,6 @@ static void vfio_msi_enable(VFIOPCIDevice *vdev)
*/
vfio_prepare_kvm_msi_virq_batch(vdev);
- vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
-retry:
vdev->msi_vectors = g_new0(VFIOMSIVector, vdev->nr_vectors);
for (i = 0; i < vdev->nr_vectors; i++) {
--
2.39.3