On Wed, Jun 12, 2019 at 01:43:20PM +0200, Andrey Konovalov wrote:
From: Catalin Marinas catalin.marinas@arm.com
It is not desirable to relax the ABI to allow tagged user addresses into the kernel indiscriminately. This patch introduces a prctl() interface for enabling or disabling the tagged ABI with a global sysctl control for preventing applications from enabling the relaxed ABI (meant for testing user-space prctl() return error checking without reconfiguring the kernel). The ABI properties are inherited by threads of the same application and fork()'ed children but cleared on execve().
The PR_SET_TAGGED_ADDR_CTRL will be expanded in the future to handle MTE-specific settings like imprecise vs precise exceptions.
Signed-off-by: Catalin Marinas catalin.marinas@arm.com
You need your signed-off-by here since you are contributing it. And thanks for adding the comment to the TIF definition.