qemu-kvm/kvm-vfio-migration-Refactor-vfio_save_block-to-return-sa.patch
Miroslav Rezanina d82d8d21a6 Synchronization from CentOS 9 Stream Release 8 of 8.0.0:
--------------------------------------------------------
* Mon Jul 17 2023 Miroslav Rezanina <mrezanin@redhat.com> - 8.0.0-8

- kvm-virtio-iommu-Fix-64kB-host-page-size-VFIO-device-ass.patch [bz#2211609 bz#2211634]
- kvm-virtio-iommu-Rework-the-traces-in-virtio_iommu_set_p.patch [bz#2211609 bz#2211634]
- kvm-vfio-pci-add-support-for-VF-token.patch [bz#2192818]
- kvm-vfio-migration-Skip-log_sync-during-migration-SETUP-.patch [bz#2192818]
- kvm-vfio-pci-Static-Resizable-BAR-capability.patch [bz#2192818]
- kvm-vfio-pci-Fix-a-use-after-free-issue.patch [bz#2192818]
- kvm-util-vfio-helpers-Use-g_file_read_link.patch [bz#2192818]
- kvm-migration-Make-all-functions-check-have-the-same-for.patch [bz#2192818]
- kvm-migration-Move-migration_properties-to-options.c.patch [bz#2192818]
- kvm-migration-Add-switchover-ack-capability.patch [bz#2192818]
- kvm-migration-Implement-switchover-ack-logic.patch [bz#2192818]
- kvm-migration-Enable-switchover-ack-capability.patch [bz#2192818]
- kvm-vfio-migration-Refactor-vfio_save_block-to-return-sa.patch [bz#2192818]
- kvm-vfio-migration-Store-VFIO-migration-flags-in-VFIOMig.patch [bz#2192818]
- kvm-vfio-migration-Add-VFIO-migration-pre-copy-support.patch [bz#2192818]
- kvm-vfio-migration-Add-support-for-switchover-ack-capabi.patch [bz#2192818]
- kvm-vfio-Implement-a-common-device-info-helper.patch [bz#2192818]
- kvm-hw-vfio-pci-quirks-Support-alternate-offset-for-GPUD.patch [bz#2192818]
- kvm-vfio-pci-Call-vfio_prepare_kvm_msi_virq_batch-in-MSI.patch [bz#2192818]
- kvm-vfio-migration-Reset-bytes_transferred-properly.patch [bz#2192818]
- kvm-vfio-migration-Make-VFIO-migration-non-experimental.patch [bz#2192818]
- kvm-vfio-pci-Fix-a-segfault-in-vfio_realize.patch [bz#2192818]
- kvm-vfio-pci-Free-leaked-timer-in-vfio_realize-error-pat.patch [bz#2192818]
- kvm-hw-vfio-pci-quirks-Sanitize-capability-pointer.patch [bz#2192818]
- kvm-vfio-pci-Disable-INTx-in-vfio_realize-error-path.patch [bz#2192818]
- kvm-vfio-migration-Change-vIOMMU-blocker-from-global-to-.patch [bz#2192818]
- kvm-vfio-migration-Free-resources-when-vfio_migration_re.patch [bz#2192818]
- kvm-vfio-migration-Remove-print-of-Migration-disabled.patch [bz#2192818]
- kvm-vfio-migration-Return-bool-type-for-vfio_migration_r.patch [bz#2192818]
- kvm-vfio-Fix-null-pointer-dereference-bug-in-vfio_bars_f.patch [bz#2192818]
- kvm-pc-bios-s390-ccw-Makefile-Use-z-noexecstack-to-silen.patch [bz#2220866]
- kvm-pc-bios-s390-ccw-Fix-indentation-in-start.S.patch [bz#2220866]
- kvm-pc-bios-s390-ccw-Provide-space-for-initial-stack-fra.patch [bz#2220866]
- kvm-pc-bios-s390-ccw-Don-t-use-__bss_start-with-the-larl.patch [bz#2220866]
- kvm-ui-Fix-pixel-colour-channel-order-for-PNG-screenshot.patch [bz#2222579]
- kvm-block-blkio-fix-module_block.py-parsing.patch [bz#2213317]
- kvm-Fix-virtio-blk-vhost-vdpa-typo-in-spec-file.patch [bz#2213317]
- Resolves: bz#2211609
  (With virtio-iommu and vfio-pci, qemu reports "warning: virtio-iommu page mask 0xfffffffffffff000 does not match 0x40201000")
- Resolves: bz#2211634
  ([aarch64] With virtio-iommu and vfio-pci, qemu coredump when host using kernel-64k package)
- Resolves: bz#2192818
  ([VFIO LM] Live migration)
- Resolves: bz#2220866
  (Misaligned symbol for s390-ccw image during qemu-kvm build)
- Resolves: bz#2222579
  (PNG screendump doesn't save screen correctly)
- Resolves: bz#2213317
  (Enable libblkio-based block drivers in QEMU)
2023-07-19 06:18:59 -04:00

103 lines
3.4 KiB
Diff

From edcf24a08d66d620a10c746824e31d230c8516ce 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 13/37] vfio/migration: Refactor vfio_save_block() to return
saved data size
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: [11/28] b4aed6ddcbde159e98275a0675dcdf45d644673b (clegoate/qemu-kvm-c9s)
Bugzilla: https://bugzilla.redhat.com/2192818
commit cf53efbbda2e
Author: Avihai Horon <avihaih@nvidia.com>
Date: Wed Jun 21 14:11:58 2023 +0300
vfio/migration: Refactor vfio_save_block() to return saved data size
Refactor vfio_save_block() to return the size of saved data on success
and -errno on error.
This will be used in next patch to implement VFIO migration pre-copy
support.
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Tested-by: YangHang Liu <yanghliu@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
hw/vfio/migration.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index 6b58dddb88..235978fd68 100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -241,8 +241,8 @@ static int vfio_query_stop_copy_size(VFIODevice *vbasedev,
return 0;
}
-/* Returns 1 if end-of-stream is reached, 0 if more data and -errno if error */
-static int vfio_save_block(QEMUFile *f, VFIOMigration *migration)
+/* Returns the size of saved data on success and -errno on error */
+static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration)
{
ssize_t data_size;
@@ -252,7 +252,7 @@ static int vfio_save_block(QEMUFile *f, VFIOMigration *migration)
return -errno;
}
if (data_size == 0) {
- return 1;
+ return 0;
}
qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE);
@@ -262,7 +262,7 @@ static int vfio_save_block(QEMUFile *f, VFIOMigration *migration)
trace_vfio_save_block(migration->vbasedev->name, data_size);
- return qemu_file_get_error(f);
+ return qemu_file_get_error(f) ?: data_size;
}
/* ---------------------------------------------------------------------- */
@@ -335,6 +335,7 @@ static void vfio_state_pending_exact(void *opaque, uint64_t *must_precopy,
static int vfio_save_complete_precopy(QEMUFile *f, void *opaque)
{
VFIODevice *vbasedev = opaque;
+ ssize_t data_size;
int ret;
/* We reach here with device state STOP only */
@@ -345,11 +346,11 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque)
}
do {
- ret = vfio_save_block(f, vbasedev->migration);
- if (ret < 0) {
- return ret;
+ data_size = vfio_save_block(f, vbasedev->migration);
+ if (data_size < 0) {
+ return data_size;
}
- } while (!ret);
+ } while (data_size);
qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE);
ret = qemu_file_get_error(f);
--
2.39.3