Some guest operating systems' drivers (Mac OS X in particular) fail to
properly initialize the Receive Address registers (probably expecting
them to be pre-initialized by an earlier component, such as a proprietary
BIOS). This patch pre-initializes the RA registers, allowing OS X
networking to function properly. Other guest operating systems are not
affected, and free to (re)initialize these registers during boot.
Signed-off-by: Gabriel Somlo <so...@cmu.edu>
---
hw/e1000.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/hw/e1000.c b/hw/e1000.c
index e4f1ffe..6478ff3 100644
--- a/hw/e1000.c
+++ b/hw/e1000.c
@@ -278,6 +278,10 @@ static void e1000_reset(void *opaque)
if (d->nic->nc.link_down) {
e1000_link_down(d);
}
+
+ /* Some guests expect pre-initialized RAH/RAL (AddrValid flag + MACaddr) */
+ d->mac_reg[RA+1] = E1000_RAH_AV;
+ memmove(&d->mac_reg[RA], &d->conf.macaddr, sizeof(struct MACAddr));
}
static void
--
1.7.7.6
