problem dumping bios

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I am trying to create a secure backup of bios + all option roms for integri=
ty verification purposes. However I cannot dump the bios. I have tried the =
following commands:
Chipsec_util spi dump rom.bin
Chipsec_util spi read 0x700000 0x100000 bios.bin

I get the error "SPI cycle not ready. SPI flash didn't return any data (tur=
n on verbose)"

I've also tried using flashrom and get the error "cannot get target bus fro=
m programmer. Programmer initialization failed"

When I check /dev I don't see any spidev0.0. Does chipsec require an spidev=
? Is there another way to dump rom?

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