Re: [Qemu-devel] [RFC PATCH v1 15/22] i386: sev: register RAM read/write ops for BIOS and PC.RAM region

[Paolo Bonzini]

On 13/09/2016 16:49, Brijesh Singh wrote:
>  
> +    /* Register SEV read/write ops for the guest RAM */
> +    if (kvm_sev_enabled())
> +        memory_region_set_ram_ops(ram, kvm_sev_get_ram_ops());

If you don't actually need this one except for -kernel it would be very
nice, because then the hooks could be limited to cpu_memory_rw_debug.

address_space_write and address_space_read are the central entry point
for device DMA, and calling mr->ram_ops->write from there seems very
wrong.  I'd rather make those hooks *ROM* read/write ops rather than RAM
read/write ops.

Paolo