Re: [SeaBIOS] [PATCH] vcpu hotplug: Setup vcpu add/remove infrastructure

[Kevin O'Connor]

On Sat, Jan 30, 2010 at 11:10:43PM +0800, Jiang, Yunhong wrote:
> For how to setup the memory as NVS, you can refer to src/memmap.c,
> maybe using add_e820().

Adding to the e820 is simple.  Just align the madt to 4k:

madt_size = ALIGN(madt_size, PAGE_SIZE);
struct multiple_apic_table *madt = memalign_high(PAGE_SIZE, madt_size);

and then add it to the e820:

add_e820((u64)madt, madt_size, E820_NVS);

It's not strictly necessary to align to 4k, but I think it makes sense
to do that.

-Kevin