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KVM: MSI: Swap payload to native endianness 

The usual MSI injection mechanism writes msi.data into memory using an
le32 wrapper. So on big endian guests, this swaps msg.data into the
expected byte order.

For irqfd however, we don't swap the payload right now, rendering
in-kernel MPIC emulation broken on PowerPC.

Swap msg.data to the correct endianness whenever we touch it.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2013-04-16 15:05:22 +02:00
parent 7b7745930b
commit d07cc1f12d
1 changed files with 5 additions and 5 deletions
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10
kvm-all.c
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@ -1131,7 +1131,7 @@ static KVMMSIRoute *kvm_lookup_msi_route(KVMState *s, MSIMessage msg)
QTAILQ_FOREACH(route, &s->msi_hashtab[hash], entry) {
if (route->kroute.u.msi.address_lo == (uint32_t)msg.address &&
route->kroute.u.msi.address_hi == (msg.address >> 32) &&
route->kroute.u.msi.data == msg.data) {
route->kroute.u.msi.data == le32_to_cpu(msg.data)) {
return route;
}
}
@ -1146,7 +1146,7 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
if (s->direct_msi) {
msi.address_lo = (uint32_t)msg.address;
msi.address_hi = msg.address >> 32;
msi.data = msg.data;
msi.data = le32_to_cpu(msg.data);
msi.flags = 0;
memset(msi.pad, 0, sizeof(msi.pad));
@ -1168,7 +1168,7 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
route->kroute.flags = 0;
route->kroute.u.msi.address_lo = (uint32_t)msg.address;
route->kroute.u.msi.address_hi = msg.address >> 32;
route->kroute.u.msi.data = msg.data;
route->kroute.u.msi.data = le32_to_cpu(msg.data);
kvm_add_routing_entry(s, &route->kroute);
@ -1200,7 +1200,7 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
kroute.flags = 0;
kroute.u.msi.address_lo = (uint32_t)msg.address;
kroute.u.msi.address_hi = msg.address >> 32;
kroute.u.msi.data = msg.data;
kroute.u.msi.data = le32_to_cpu(msg.data);
kvm_add_routing_entry(s, &kroute);
@ -1220,7 +1220,7 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
kroute.flags = 0;
kroute.u.msi.address_lo = (uint32_t)msg.address;
kroute.u.msi.address_hi = msg.address >> 32;
kroute.u.msi.data = msg.data;
kroute.u.msi.data = le32_to_cpu(msg.data);
return kvm_update_routing_entry(s, &kroute);
}