From patchwork Wed Jan 20 17:01:49 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: ide save/restore current transfer fields Date: Wed, 20 Jan 2010 07:01:49 -0000 From: Juan Quintela X-Patchwork-Id: 43317 Message-Id: <1264006909-22040-1-git-send-email-quintela@redhat.com> To: qemu-devel@nongnu.org Cc: Marcelo Tosatti From: Marcelo Tosatti If migration takes place between write of the bmdma address register and write of the command register (to initiate DMA), the destination will not properly start the DMA op, hanging the guest: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen ata1.00: cmd c8/00:16:41:00:00/00:00:00:00:00/e0 tag 0 dma 11264 in res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) ata1.00: status: { DRDY } Fix by sending current transfer information in the migration data. We need to update ide version to 4 for this to work. As we don't have subsectios, we need to chain the update increase until vmstate_ide_pci (quintela) Signed-off-by: Marcelo Tosatti Signed-off-by: Juan Quintela --- hw/ide/pci.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/hw/ide/pci.c b/hw/ide/pci.c index 780fc5f..4d95cc5 100644 --- a/hw/ide/pci.c +++ b/hw/ide/pci.c @@ -123,7 +123,7 @@ void bmdma_addr_writel(void *opaque, uint32_t addr, uint32_t val) static const VMStateDescription vmstate_bmdma = { .name = "ide bmdma", - .version_id = 3, + .version_id = 4, .minimum_version_id = 0, .minimum_version_id_old = 0, .fields = (VMStateField []) { @@ -133,6 +133,10 @@ static const VMStateDescription vmstate_bmdma = { VMSTATE_INT64(sector_num, BMDMAState), VMSTATE_UINT32(nsector, BMDMAState), VMSTATE_UINT8(unit, BMDMAState), + VMSTATE_UINT32_V(cur_addr, BMDMAState, 4), + VMSTATE_UINT32_V(cur_prd_last, BMDMAState, 4), + VMSTATE_UINT32_V(cur_prd_addr, BMDMAState, 4), + VMSTATE_UINT32_V(cur_prd_len, BMDMAState, 4), VMSTATE_END_OF_LIST() } }; @@ -152,7 +156,7 @@ static int ide_pci_post_load(void *opaque, int version_id) const VMStateDescription vmstate_ide_pci = { .name = "ide", - .version_id = 3, + .version_id = 4, .minimum_version_id = 0, .minimum_version_id_old = 0, .post_load = ide_pci_post_load,