[SeaBIOS] [PATCH] esp: enable busmaster
Paolo Bonzini
pbonzini at redhat.com
Tue Nov 20 18:33:41 CET 2012
The HBA does DMA, thus we must enable the busmaster bit,
otherwise dma access will fail with recent qemu versions.
Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
---
src/esp-scsi.c | 2 ++
1 file modificato, 2 inserzioni(+)
diff --git a/src/esp-scsi.c b/src/esp-scsi.c
index b795012..c43e55b 100644
--- a/src/esp-scsi.c
+++ b/src/esp-scsi.c
@@ -202,6 +202,8 @@ init_esp_scsi(struct pci_device *pci)
pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf),
pci_bdf_to_fn(bdf), iobase);
+ pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
+
// reset
outb(ESP_CMD_RESET, iobase + ESP_CMD);
--
1.7.12.1
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