# Fix the Link detection in MacOS
# Author Alex Graf - agraf@suse 
Index: kvm-75/qemu/hw/rtl8139.c
===================================================================
--- kvm-75.orig/qemu/hw/rtl8139.c
+++ kvm-75/qemu/hw/rtl8139.c
@@ -422,6 +422,9 @@ static void RTL8139TallyCounters_load(QE
 /* Saves values of tally counters to VM state file */
 static void RTL8139TallyCounters_save(QEMUFile* f, RTL8139TallyCounters *tally_counters);
 
+static uint32_t rtl8139_io_readb(void *opaque, uint8_t addr);
+static uint32_t rtl8139_io_readw(void *opaque, uint8_t addr);
+
 typedef struct RTL8139State {
     uint8_t phys[8]; /* mac address */
     uint8_t mult[8]; /* multicast mask array */
@@ -462,6 +465,7 @@ typedef struct RTL8139State {
 
     uint16_t CpCmd;
     uint8_t  TxThresh;
+    enum NICLink link;
 
     PCIDevice *pci_dev;
     VLANClientState *vc;
@@ -1227,7 +1231,7 @@ static void rtl8139_reset(RTL8139State *
     s->Config0 = 0x0; /* No boot ROM */
     s->Config1 = 0xC; /* IO mapped and MEM mapped registers available */
     s->Config3 = 0x1; /* fast back-to-back compatible */
-    s->Config5 = 0x0;
+    s->Config5 = Cfg5_LDPS;
 
     s->CSCR = CSCR_F_LINK_100 | CSCR_HEART_BIT | CSCR_LD;
 
@@ -1251,6 +1255,13 @@ static void rtl8139_reset(RTL8139State *
     s->TimerInt = 0;
     s->TCTR_base = 0;
 
+    s->eeprom.contents[10] = s->Config0 | s->Config1 << 8;
+    s->eeprom.contents[6] = (rtl8139_io_readb(s, MediaStatus) & 0xc0) | ((rtl8139_io_readw(s, BasicModeCtrl) >> 8) & 0x23)
+                          | (s->Config3 << 8);
+    s->eeprom.contents[12] = s->Config4 << 8;
+
+    s->eeprom.contents[15] = s->Config5 << 8;
+
     /* reset tally counters */
     RTL8139TallyCounters_clear(&s->tally_counters);
 }
@@ -2846,7 +2857,7 @@ static uint32_t rtl8139_io_readb(void *o
             break;
 
         case MediaStatus:
-            ret = 0xd0;
+            ret = 0xd0 | ((s->link == Link_10mbps) << 3);
             DEBUG_PRINT(("RTL8139: MediaStatus read 0x%x\n", ret));
             break;
 
@@ -3440,6 +3451,15 @@ PCIDevice *pci_rtl8139_init(PCIBus *bus,
 
     s->pci_dev = (PCIDevice *)d;
     memcpy(s->macaddr, nd->macaddr, 6);
+    switch(nd->link) {
+        case Link_10mbps:
+        case Link_100mbps:
+            s->link = nd->link;
+            break;
+        default:
+            s->link = Link_100mbps;
+            break;
+    }
     rtl8139_reset(s);
     s->vc = qemu_new_vlan_client(nd->vlan, rtl8139_receive,
                                  rtl8139_can_receive, s);
Index: kvm-75/qemu/net.h
===================================================================
--- kvm-75.orig/qemu/net.h
+++ kvm-75/qemu/net.h
@@ -55,12 +55,20 @@ void net_client_uninit(NICInfo *nd);
 
 #define MAX_NICS 8
 
+enum NICLink {
+    Link_default,
+    Link_10mbps,
+    Link_100mbps,
+    Link_1000mbps,
+};
+
 struct NICInfo {
     uint8_t macaddr[6];
     const char *model;
     VLANState *vlan;
     int devfn;
     int used;
+    enum NICLink link;
 };
 
 extern int nb_nics;
Index: kvm-75/qemu/vl.c
===================================================================
--- kvm-75.orig/qemu/vl.c
+++ kvm-75/qemu/vl.c
@@ -5555,6 +5555,7 @@ int net_client_init(const char *device,
         }
         nd->vlan = vlan;
         nd->used = 1;
+        nd->link = Link_default;
         nb_nics++;
         vlan->nb_guest_devs++;
         ret = idx;