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Thanks to David Binderman for finding and reporting it.
Signed-off-by: NeilBrown <neilb@suse.de>
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The PCI-3.0 Firmware specification allows for option-roms to have
512-byte alignment rather than 2048-byte. As there does not appear to
be a reliable method to detect a PCI-3.0 compliant BIOS from userspace
we allow the imsm platform detection code to presume that a system
modern enough to have an Intel AHCI controller does not have
dangerous/legacy ISA regions in the option-ROM memory space.
An environment variable to disable this behaviour, IMSM_SAFE_OROM_SCAN,
is added in case this presumption is ever proven wrong.
Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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IMSM_NO_PLATFORM turns off checks that should be tested, so provide a
IMSM_TEST_OROM variable to allow testing the orom constraints in the
mdadm regression suite.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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The option-rom advertises its capabilities in a data structure located in
the platform ROM region 0xc0000-0xf0000. Attempt to detect the option-rom
and limit array creation to the platform's capabilities.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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