Re: [PATCH v2 14/28] arm64/sve: Backend logic for setting the vector length

Catalin Marinas <[email protected]> Wed, 13 Sep 2017 10:29:11 -0700

Newsgroups	gmane.linux.kernel.cross-arch,gmane.linux.ports.arm.kernel,gmane.comp.emulators.kvm.arm.devel,gmane.comp.lib.glibc.alpha,gmane.comp.gdb.devel
Message-ID	<20170913172911.3ca2h6cpju7etifi@localhost>

On Thu, Aug 31, 2017 at 06:00:46PM +0100, Dave P Martin wrote:
> This patch implements the core logic for changing a task's vector
> length on request from userspace.  This will be used by the ptrace
> and prctl frontends that are implemented in later patches.
> 
> The SVE architecture permits, but does not require, implementations
> to support vector lengths that are not a power of two.  To handle
> this, logic is added to check a requested vector length against a
> possibly sparse bitmap of available vector lengths at runtime, so
> that the best supported value can be chosen.
> 
> Signed-off-by: Dave Martin <[email protected]>
> Cc: Alex BennÃ©e <[email protected]>

Can this be merged with patch 20? It seems to add the PR_ definitions
which get actually used later when the prctl interface is added.

-- 
Catalin