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    Subject[PATCH 1/2] xen/setup: Ignore E820_UNUSABLE when setting 1-1 mappings.
    Date
    From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

    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@oracle.com>
    ---
    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 90bac0a..fba4a6c 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));
    --
    1.7.4.1


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