On 24.10.2011, at 16:00, Jordan Justen wrote: > Avi, > > Alex pointed out that my patch below should not work for kvm, because > kvm currently does not support executing from a rom region. This > surprised me, because I thought I had been testing with kvm enabled. > But, it turns out I wasn't, and in fact this patch does not work with > kvm enabled. (Sorry all for this big mistake in my testing.) > > Alex also suggested that you might be able to answer whether it would > be possible to execute from a flash device (ie, qemu 'rom_device' > device). Is this something that would be possible with kvm? > > If so, would it require changes to kvm on the kernel side? Or, the > qemu side? Perhaps just within the pflash_cfi01 device? > > Would implementing it require the flash based execution to be very > slow under kvm?
To be more precise, we need a memory region which is backed by RAM on reads and does MMIO on writes. I remember Avi talking about that a while back, but don't know if he pursued it any further. Alex
