vagran wrote:
Hi,
I have noted that Qemu VGA and serial console with EFI BIOS stopped
working in
0.14.0 (and in latest development snapshot is still not working).
Everything was
fine in 0.13.0. However EFI BIOS itself is able to load kernel if it was
properly configured on used disk image. The only effect is that
neither VGA nor
serial console is not functioning. After short investigation I have
discovered
that this functionality was broken by this commit:
commit 9bb3358627d87d8de25fb41b7276575539d799a7
Author: Isaku Yamahata <yamah...@valinux.co.jp>
Date: Fri Nov 19 18:56:02 2010 +0900
Do you have any idea how this change could affect EFI consoles?
After further investigation I have found that the following patch provides
a workaround for the problem, may be it could be useful for somebody who
is more familiar with Qemu PCI code:
diff --git a/hw/pci.c b/hw/pci.c
index 8b76cea..06dd7ab 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -162,9 +162,11 @@ void pci_device_reset(PCIDevice *dev)
pci_update_irq_status(dev);
pci_device_deassert_intx(dev);
/* Clear all writeable bits */
+#if 0
pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
pci_get_word(dev->wmask + PCI_COMMAND) |
pci_get_word(dev->w1cmask + PCI_COMMAND));
+#endif
pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
pci_get_word(dev->wmask + PCI_STATUS) |
pci_get_word(dev->w1cmask + PCI_STATUS));
Best regards,
Artyom.
