target/arm: Cache the GP bit for a page in MemTxAttrs
Caching the bit means that we will not have to re-walk the page tables to look up the bit during translation. Signed-off-by: NRichard Henderson <richard.henderson@linaro.org> Reviewed-by: NPeter Maydell <peter.maydell@linaro.org> Message-id: 20190128223118.5255-6-richard.henderson@linaro.org [PMM: no need to OR in guarded bit status] Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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