From: Dave Hansen <dave.hansen@intel.com>
To: Andy Lutomirski <luto@kernel.org>
Cc: X86 ML <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
David Laight <David.Laight@aculab.com>,
Kees Cook <keescook@chromium.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [RFC PTI 1/3] x86/pti: Vastly simplify pgd synchronization
Date: Fri, 8 Dec 2017 12:48:25 -0800 [thread overview]
Message-ID: <87386e3b-f5a5-2481-9611-ce993314347a@intel.com> (raw)
In-Reply-To: <CALCETrWs2Vt2ws8ox8_9V+VYT35feq0sbx6Ped-VF8JvsmNLfA@mail.gmail.com>
On 12/08/2017 12:49 PM, Andy Lutomirski wrote:
>> if ((pgd.pgd & (_PAGE_USER|_PAGE_PRESENT)) &&
>> (__supported_pte_mask & _PAGE_NX))
> I assume you mean pgd.pgd & (_PAGE_USER|_PAGE_PRESENT) ==
> (_PAGE_USER|_PAGE_PRESENT)?
Yeah.
next prev parent reply other threads:[~2017-12-08 20:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-08 19:59 [RFC PTI 0/3] Clean up pgd handling and fix VSYSCALL and LDT Andy Lutomirski
2017-12-08 19:59 ` [RFC PTI 1/3] x86/pti: Vastly simplify pgd synchronization Andy Lutomirski
2017-12-08 20:17 ` Dave Hansen
2017-12-08 20:49 ` Andy Lutomirski
2017-12-08 20:48 ` Dave Hansen [this message]
2017-12-08 19:59 ` [RFC PTI 2/3] Revert "x86/mm/pti: Disable native VSYSCALL" Andy Lutomirski
2017-12-08 19:59 ` [RFC PTI 3/3] x86/pti: Put the LDT in its own PGD if PTI is on Andy Lutomirski
2017-12-08 21:48 ` Thomas Gleixner
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