x86: limit E820 map when a user-defined memory map is specified

x86: limit E820 map when a user-defined memory map is specified

This patch brings back limiting of the E820 map when a user-defined
E820 map is specified. While the behaviour of i386 (32 bit) was to limit
the E820 map (and /proc/iomem), the behaviour of x86-64 (64 bit) was not to
limit.

That patch limits the E820 map again for both x86 architectures.

Code was tested for compilation and booting on a 32 bit and 64 bit system.

Signed-off-by: Bernhard Walle <[email protected]>
Acked-by: Yinghai Lu <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Bernhard Walle <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>