From mboxrd@z Thu Jan 1 00:00:00 1970 From: catalin.marinas@arm.com (Catalin Marinas) Date: Mon, 5 Oct 2015 17:49:24 +0100 Subject: [PATCH 7/7] Document the use of the arm64 contpte/nonconpte flags. In-Reply-To: <1443818865-19846-8-git-send-email-jeremy.linton@arm.com> References: <1443818865-19846-1-git-send-email-jeremy.linton@arm.com> <1443818865-19846-8-git-send-email-jeremy.linton@arm.com> Message-ID: <20151005164924.GB5557@MBP.local> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Oct 02, 2015 at 03:47:45PM -0500, Jeremy Linton wrote: > These flags allow the user to enable/disable the contiguous PTE > detection and marking on the kernel command line for > debugging purposes. > > Signed-off-by: Jeremy Linton > --- > Documentation/kernel-parameters.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt > index 22a4b68..2766290 100644 > --- a/Documentation/kernel-parameters.txt > +++ b/Documentation/kernel-parameters.txt > @@ -744,6 +744,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. > seconds. Defaults to 10*60 = 10mins. A value of 0 > disables the blank timer. > > + contpte [ARM64] Enable contiguous PTE marking for the kernel > + linear range. This may be disabled with nocontpte. > + Default: Enabled I recall you asked the question but I didn't have the time to reply. I don't think we need a command line option for this. In the "unlikely" event that something is broken in hardware (or software) and we want to disable the contiguous bit, I would rather have a Kconfig option. -- Catalin