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Read only memory is useful for triggering VM exits when the VM writes to memory while allowing reads transparently and quickly. For example, a virtual device implementation might not care if the VM reads a memory mapped device register, but a exit would be required if the VM wrote to the same register. TEST=cargo test -p kvm; ./build_test BUG=chromium:800626 Change-Id: Ic605b2cfc2a1e44941d91945f9390b9abb820040 Reviewed-on: https://chromium-review.googlesource.com/903075 Commit-Ready: Zach Reizner <zachr@chromium.org> Tested-by: Zach Reizner <zachr@chromium.org> Reviewed-by: Zach Reizner <zachr@chromium.org> |
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