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: David Vrabel <david.vrabel@xxxxxxxxxx>
Reviewed-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
---
arch/x86/xen/setup.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 55f388e..32910c5 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -646,6 +646,7 @@ char * __init xen_memory_setup(void)
phys_addr_t addr = map[i].addr;
phys_addr_t size = map[i].size;
u32 type = map[i].type;
+ bool discard = false;
if (type == E820_RAM) {
if (addr < mem_end) {
@@ -656,10 +657,11 @@ char * __init xen_memory_setup(void)
xen_add_extra_mem(addr, size);
xen_max_p2m_pfn = PFN_DOWN(addr + size);
} else
- type = E820_UNUSABLE;
+ discard = true;
}
- xen_align_and_add_e820_region(addr, size, type);
+ if (!discard)
+ xen_align_and_add_e820_region(addr, size, type);
map[i].addr += size;
map[i].size -= size;
--
2.1.4
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