linux-kernel - Re: [PATCH V7 14/18] memremap_pages: Add memremap.pks_fault

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Message-ID: <20210807193259.GD3169279@iweiny-DESK2.sc.intel.com>
Date:   Sat, 7 Aug 2021 12:32:59 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-mm@...ck.org
Subject: Re: [PATCH V7 14/18] memremap_pages: Add memremap.pks_fault_mode

On Tue, Aug 03, 2021 at 09:57:31PM -0700, Randy Dunlap wrote:
> On 8/3/21 9:32 PM, ira.weiny@...el.com wrote:
> > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> > index bdb22006f713..7902fce7f1da 100644
> > --- a/Documentation/admin-guide/kernel-parameters.txt
> > +++ b/Documentation/admin-guide/kernel-parameters.txt
> > @@ -4081,6 +4081,20 @@
> >   	pirq=		[SMP,APIC] Manual mp-table setup
> >   			See Documentation/x86/i386/IO-APIC.rst.
> > +	memremap.pks_fault_mode=	[X86] Control the behavior of page map
> > +			protection violations.  Violations may not be an actual
> > +			use of the memory but simply an attempt to map it in an
> > +			incompatible way.
> > +			(depends on CONFIG_DEVMAP_ACCESS_PROTECTION
> 
> Missing closing ')' above.

Fixed.  Thank you!
Ira

> 
> > +
> > +			Format: { relaxed | strict }
> > +
> > +			relaxed - Print a warning, disable the protection and
> > +				  continue execution.
> > +			strict - Stop kernel execution via BUG_ON or fault
> > +
> > +			default: relaxed
> > +
> 
> 
> -- 
> ~Randy
> 
>