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libstb/trustedboot.c: import stb_final() from stb.c
The stb_final() primary goal is to measure the event EV_SEPARATOR into PCR[0-7] when trusted boot is about to exit the boot services. This imports the stb_final() from stb.c into trustedboot.c, but making the following changes: - Rename it to trustedboot_exit_boot_services(). - As specified in the TCG PC Client spec, EV_SEPARATOR events must be logged with the name 0xFFFFFF. - Remove the rom driver clean-up call. - Don't allow code to be measured in skiboot after trustedboot_exit_boot_services() is called. Signed-off-by: Claudio Carvalho <cclaudio@linux.vnet.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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