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In the ITS, a DTE is an entry in the device table, which contains multiple fields. Currently the function get_dte() which reads one entry from the device table returns it as a raw 64-bit integer, which we then pass around in that form, only extracting fields from it as we need them. Create a real C struct with the same fields as the DTE, and populate it in get_dte(), so that that function and update_dte() are the only ones that need to care about the in-guest-memory format of the DTE. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220201193207.2771604-3-peter.maydell@linaro.org