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| author | Richard Henderson <richard.henderson@linaro.org> | 2021-02-12 10:48:33 -0800 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-02-16 11:04:53 +0000 |
| commit | 26bab757d41b853ea84cb52a10fafc9c10069658 (patch) | |
| tree | 90ec65d72b68d4f1cbd150369c704d0b9225e19c /linux-user/qemu.h | |
| parent | d9c5858570a57f374b71216c5da39ee381fa92f5 (diff) | |
| download | focaccia-qemu-26bab757d41b853ea84cb52a10fafc9c10069658.tar.gz focaccia-qemu-26bab757d41b853ea84cb52a10fafc9c10069658.zip | |
linux-user: Introduce PAGE_ANON
Record whether the backing page is anonymous, or if it has file backing. This will allow us to get close to the Linux AArch64 ABI for MTE, which allows tag memory only on ram-backed VMAs. The real ABI allows tag memory on files, when those files are on ram-backed filesystems, such as tmpfs. We will not be able to implement that in QEMU linux-user. Thankfully, anonymous memory for malloc arenas is the primary consumer of this feature, so this restricted version should still be of use. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210212184902.1251044-3-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'linux-user/qemu.h')
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