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Commit f5775e0b authored by David Vrabel's avatar David Vrabel
Browse files

x86/xen: discard RAM regions above the maximum reservation 



During setup, discard RAM regions that are above the maximum
reservation (instead of marking them as E820_UNUSABLE).  This allows
hotplug memory to be placed at these addresses.

Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
Reviewed-by: default avatarDaniel Kiper <daniel.kiper@oracle.com>
parent f6a6cb1a

arch/x86/xen/setup.c

+5 −2
Original line number Diff line number Diff line
@@ -829,6 +829,8 @@ char * __init xen_memory_setup(void) 
	addr = xen_e820_map[0].addr;

	size = xen_e820_map[0].size;

	while (i < xen_e820_map_entries) {

		bool discard = false;



		chunk_size = size;

		type = xen_e820_map[i].type;
@@ -843,9 +845,10 @@ char * __init xen_memory_setup(void) 
				xen_add_extra_mem(pfn_s, n_pfns);

				xen_max_p2m_pfn = pfn_s + n_pfns;

			} else

				type = E820_UNUSABLE;

				discard = true;

		}



		if (!discard)

			xen_align_and_add_e820_region(addr, chunk_size, type);



		addr += chunk_size;