Re: [PATCH v17 03/15] arm64: Introduce prctl() options to control the tagged user addresses ABI

On 17/06/2019 14:56, Catalin Marinas wrote: > On Wed, Jun 12, 2019 at 01:43:20PM +0200, Andrey Konovalov wrote: >> From: Catalin Marinas >> >> It is not desirable to relax the ABI to allow tagged user addresses into >> the kernel indiscriminately. This patch introduces a prctl() interface >> for e

Re: [PATCH v17 15/15] selftests, arm64: add a selftest for passing tagged pointers to kernel

On 12/06/2019 12:43, Andrey Konovalov wrote: > --- /dev/null > +++ b/tools/testing/selftests/arm64/tags_lib.c > @@ -0,0 +1,62 @@ > +// SPDX-License-Identifier: GPL-2.0 > + > +#include > +#include > + > +#define TAG_SHIFT(56) > +#define TAG_MASK (0xffUL << TAG_SHIFT) > + > +#define PR_SET_