Here's how we're using it at TEK:
First of all, you need a syslinux config file (the example I'll be adding is for PXELINUX)
PROMPT 1
DEFAULT normal
TIMEOUT 50
TOTALTIMEOUT 3030
SAY TEKplat pxelinux bootup
LABEL normal
KERNEL lua.c32
APPEND pxeboot.lua tek-product=iris
Next here's some very ugly, but functional lua:
printf = function(s,...)
return io.write(s:format(...))
end -- function
cpuflags = cpu.flags()
boardfound = 0
-- NOTE: DMI-token-specific sections may still override this and force a
-- 32-bit install even on 64-bit systems (i.e. on Irwindale Xeons, where
-- 64-bit mode may adversely impact performance).
if (cpuflags["flags.lm"] == "yes") then
kernfile = "kern64"
initramfile = "ram64"
else
kernfile = "kern32"
initramfile = "ram32"
end
ttyarg = ""
if (dmi.supported()) then
dmitable = dmi.gettable()
if (string.upper(string.sub(dmitable["system.manufacturer"], 1, 5)) == "INTEL") then
-- Intel supplies both the MPCBL0001 (Kennicott) and MPCBL0040 (Damascus)
-- blade; they sport consistent DMI information, with the caveat that
-- sometimes Intel will append a suffix to the product name to distinguish
-- certain feature presence (like integrated fiber-channel on Kennicott).
-- Both run exclusively off ttyS0 at 9600baud.
if (string.upper(string.sub(dmitable["system.product_name"], 1, 9)) == "MPCBL0040") then
boardfound = 1
printf("Detected Intel MPCBL0040 (Damascus) blade\n")
ttyarg = "console=ttyS0,9600n8"
-- NOTE: we have a ton of Kennicott engineering samples in play in our
-- development labs. It's possible many of them have incorrect or
-- incomplete DMI information, in which case this check may not work.
elseif (string.upper(string.sub(dmitable["system.product_name"], 1, 9)) == "MPCBL0001") then
boardfound = 1
printf("Detected Intel MPCBL0001 (Kennicott) blade\n")
ttyarg = "console=ttyS0,9600n8"
-- Intel also supplies us with three 2U (Langley or Ballinger) variants:
-- Prestonia (TIGPR2U), Irwindale (TIGI2U), and Harpertown (TIGH2U). The
-- Prestonia and Irwindale variants only have the product name populated
-- in the DMI baseboard information (and it's really just the motherboard
-- model number, not a chassis model number).
-- TODO: make sure the Ballinger Harpertowns match, as we switched between
-- Langley and Ballinger for this particular variant. Also make sure the
-- terminal settings are correct/usable between both direct-serial and
-- serial-over-LAN cases.
elseif (string.upper(string.sub(dmitable["system.product_name"], 1, 8)) == "T5000PAL") then
-- This is most likely a TIGH2U (Langley/Ballinger Harpertown). SOL is
-- supported, even though Intel kind of shanked it on this product.
boardfound = 1
printf("Detected Intel TIGH2U (Langley-Harpertown) system\n")
ttyarg = "console=tty0 console=ttyS1,19200n8"
elseif (string.upper(string.sub(dmitable["base_board.product_name"], 1, 10)) == "SE7501WV2S") then
-- This is most likely a TIGPR2U (Langley Prestonia). I don't think we
-- ever supported SOL on this thing.
boardfound = 1
printf("Detected Intel TIGPR2U (Langley-Prestonia) system\n")
ttyarg = "console=tty0 console=ttyS0,19200n8"
elseif (string.upper(string.sub(dmitable["base_board.product_name"], 1, 11)) == "SE7520JR23S") then
-- This is most likely a TIGI2U (Langley Irwindale). Did we ever support
-- SOL here? I honestly don't know.
-- TODO: determine if we want to force Irwindales to 32-bit mode for
-- performance reasons.
boardfound = 1
printf("Detected Intel TIGI2U (Langley-Irwindale) system\n")
ttyarg = "console=tty0 console=ttyS1,19200n8"
end
elseif (string.upper(string.sub(dmitable["system.manufacturer"], 1, 7)) == "RADISYS") and (string.upper(string.sub(dmitable["system.product_name"], 1, 9)) == "MPCBL0040") then
-- Radisys also supplies the MPCBL0040 (Damascus)
-- blade; they sport consistent DMI information, with the caveat that
-- sometimes Intel will append a suffix to the product name to distinguish
-- certain feature presence (like integrated fiber-channel on Kennicott).
-- Both run exclusively off ttyS0 at 9600baud.
boardfound = 1
printf("Detected RadiSys MPCBL0040 (Damascus) blade\n")
ttyarg = "console=ttyS0,9600n8"
elseif (string.upper(string.sub(dmitable["system.manufacturer"], 1, 7)) == "RADISYS") and (string.find(dmitable["system.product_name"], "ATCA[-]45[05]0")) then
-- Barwick comes in two known variants so far: a 4-core Nehalem version
-- (ATCA-4500), and a 6-core Westmere version (ATCA-4550).
-- Geo/Iris on Barwick only uses ttyS0 at 115.2.
boardfound = 1
printf("Detected RadiSys ATCA-45x0 (Barwick) blade\n")
ttyarg = "console=ttyS0,115200n8"
elseif (string.upper(dmitable["system.manufacturer"]) == "KONTRON") and (string.upper(dmitable["system.product_name"]) == "KTC5520/EATX") then
-- Geo/Iris on Sandpiper sets up consoles on both the VGA and on ttyS1.
-- ttyS1 is the serial-over-LAN port and should be running at 115.2.
boardfound = 1
printf("Detected Kontron KTC-5520/EATX motherboard\n")
ttyarg = "console=ttyS1,115200n8 console=tty0"
elseif (string.upper(dmitable["system.manufacturer"]) == "EMERSON") and (string.find(dmitable["system.product_name"], "ATCA[-]736[05]")) then
-- We're aware of both an ATCA-7360 and ATCA-7365 blade from Emerson.
-- The two are pretty much functionally equivalent as far as we care.
-- Geo/Iris on Emerson ATCA-736x sets up a serial console on ttyS0.
boardfound = 1
printf("Detected Emerson ATCA-736x blade\n")
ttyarg = "console=ttyS0,9600n8"
elseif (string.upper(dmitable["system.product_name"]) == "VIRTUALBOX") then
boardfound = 1
printf("Detected Virtualbox\n")
ttyarg = "console=tty0"
end
-- TODO: add cases to handle old Geo crap (Kennicott, Damascus, Langley etc)
if (boardfound == 0) then
-- It might have been useful to spit out a DMI dump, but this would
-- flood the console. Besides, we already have a separate DMI dump
-- option in the bootloader.
printf("Unknown board ('%s' '%s')\n", dmitable["system.manufacturer"], dmitable["system.product_name"])
syslinux.sleep(5)
end
else
printf("No DMI information available\n")
syslinux.sleep(5)
end
kernargs = "raid=noautodetect initrd=" .. initramfile
kernargs = kernargs .. " ip=off diskless"
if (boardfound ~= 0) then
-- Append the console argument.
kernargs = kernargs .. " "
kernargs = kernargs .. ttyarg
else
printf("Proceeding with default (VGA console only)\n")
end
-- Append any arguments passed at the boot prompt as well, or within the
-- syslinux config entry.
idx = 1
while (arg[idx]) do
kernargs = kernargs .. " "
kernargs = kernargs .. arg[idx]
idx = idx + 1
end
printf("Loading kernel %s...\n", kernfile)
kernel = syslinux.loadfile(kernfile)
printf("Loading initramfs %s...\n", initramfile)
initrd = syslinux.initramfs_init()
syslinux.initramfs_load_archive(initrd, initramfile)
printf("Running with kernel arguments: %s\n", kernargs)
syslinux.sleep(3)
syslinux.boot_it(kernel, initrd, kernargs)
syslinux.sleep(20)
