On Wed, May 11, 2011 at 12:05 AM, Sasha Levin <[email protected]> wrote:
> + if (kvm->ram_size < 0xe0000000) {
Please use the ULL postfix for constants to ensure the types are sane.
Also, please come up with a sane name for these.
> @@ -60,7 +60,14 @@ static inline u32 segment_to_flat(u16 selector, u16 offset)
>
> static inline void *guest_flat_to_host(struct kvm *self, unsigned long
> offset)
> {
> - return self->ram_start + offset;
> + /*
> + * We have a gap between 0xe0000000 and 0x100000000.
> + * Consider it when translating an address above 0x100000000.
> + */
> + if (offset < 0xe0000000)
> + return self->ram_start + offset;
> + else
> + return self->ram_start + 0xe0000000 + (offset - 0x100000000);
> }
Would it not be simpler to mmap() a "ram_size + gap_size" contiguous
region and mprotect(PROT_NONE) the gap? We'd still tell KVM and E820
maps about two separate regions but guest_flat_to_host() would
work-as-is.
Pekka
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