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The GPUs can have different default context layouts, and the sizes could vary based on platform or BIOS. In order to back the context object with a properly sized BO, we must read this register in order to find out a sufficient size. Thankfully (sarcarm!), the register moves and changes meanings throughout generations. CTX and CXT differences are intentional as that is how it is in the documentation (prior to GEN6 it was CXT). Signed-off-by: Ben Widawsky <ben@bwidawsk.net> |
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