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[Qemu-devel] [PATCH] ide save/restore current transfer fields
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] [PATCH] ide save/restore current transfer fields |
Date: |
Wed, 20 Jan 2010 14:22:28 -0200 |
User-agent: |
Mutt/1.5.20 (2009-08-17) |
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.
Signed-off-by: Marcelo Tosatti <address@hidden>
diff --git a/hw/ide/pci.c b/hw/ide/pci.c
index 780fc5f..9f245ed 100644
--- a/hw/ide/pci.c
+++ b/hw/ide/pci.c
@@ -133,6 +135,10 @@ static const VMStateDescription vmstate_bmdma = {
VMSTATE_INT64(sector_num, BMDMAState),
VMSTATE_UINT32(nsector, BMDMAState),
VMSTATE_UINT8(unit, BMDMAState),
+ VMSTATE_UINT32(cur_addr, BMDMAState),
+ VMSTATE_UINT32(cur_prd_last, BMDMAState),
+ VMSTATE_UINT32(cur_prd_addr, BMDMAState),
+ VMSTATE_UINT32(cur_prd_len, BMDMAState),
VMSTATE_END_OF_LIST()
}
};
- [Qemu-devel] [PATCH] ide save/restore current transfer fields,
Marcelo Tosatti <=