[Xen-devel] [PATCH 1/2] xen/setup: Ignore E820_UNUSABLE when setting 1-1 mappings.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

When we parse the raw E820, the Xen hypervisor can set "E820_RAM"
to "E820_UNUSABLE" if the mem=X argument is used. As such we
should _not_ consider the E820_UNUSABLE as an 1-1 identity
mapping, but instead use the same case as for E820_RAM.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 arch/x86/xen/setup.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index fa0269a..5840af1 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -166,7 +166,7 @@ static unsigned long __init xen_set_identity(const struct 
e820entry *list,
                if (last > end)
                        continue;
 
-               if (entry->type == E820_RAM) {
+               if ((entry->type == E820_RAM) || (entry->type == 
E820_UNUSABLE)) {
                        if (start > start_pci)
                                identity += set_phys_range_identity(
                                                PFN_UP(start_pci), 
PFN_DOWN(start));
-- 
1.7.1


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