tree cd7c104fa7e08538dcff948109b21ae4a5b1ce97
parent 0522604b09b8cff54ba2450a7478da2a4d084817
author Alexander Graf <agraf@suse.de> 1386840559 +0100
committer Paolo Bonzini <pbonzini@redhat.com> 1386938330 +0100

roms: Flush icache when writing roms to guest memory

We use the rom infrastructure to write firmware and/or initial kernel
blobs into guest address space. So we're basically emulating the cache
off phase on very early system bootup.

That phase is usually responsible for clearing the instruction cache for
anything it writes into cachable memory, to ensure that after reboot we
don't happen to execute stale bits from the instruction cache.

So we need to invalidate the icache every time we write a rom into guest
address space. We do not need to do this for every DMA since the guest
expects it has to flush the icache manually in that case.

This fixes random reboot issues on e5500 (booke ppc) for me.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>