[Xen-changelog] [xen-unstable] hvmloader: enable bus mastering of PCI device

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1229001962 0
# Node ID 7802a247e6f9a1541a3b3e4e76b16861b15f66ce
# Parent  df32584505c21c4d9a39991785773e667adffb18
hvmloader: enable bus mastering of PCI device

Without this, init routine in some PCI option ROM doesn't work well.

Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
---
 tools/firmware/hvmloader/hvmloader.c |    5 +++++
 1 files changed, 5 insertions(+)

diff -r df32584505c2 -r 7802a247e6f9 tools/firmware/hvmloader/hvmloader.c
--- a/tools/firmware/hvmloader/hvmloader.c      Thu Dec 11 13:25:28 2008 +0000
+++ b/tools/firmware/hvmloader/hvmloader.c      Thu Dec 11 13:26:02 2008 +0000
@@ -269,6 +269,11 @@ static void pci_setup(void)
             printf("pci dev %02x:%x INT%c->IRQ%u\n",
                    devfn>>3, devfn&7, 'A'+pin-1, isa_irq);
         }
+
+        /* Enable bus mastering. */
+        cmd = pci_readw(devfn, PCI_COMMAND);
+        cmd |= PCI_COMMAND_MASTER;
+        pci_writew(devfn, PCI_COMMAND, cmd);
     }
 
     /* Assign iomem and ioport resources in descending order of size. */

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