From: Dave Hansen <dave.hansen@linux.intel.com>
To: Nadav Amit <nadav.amit@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
"open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
keescook@google.com, Hugh Dickins <hughd@google.com>,
Juergen Gross <jgross@suse.com>,
x86@kernel.org
Subject: Re: [PATCH 2/3] x86/mm: introduce __PAGE_KERNEL_GLOBAL
Date: Fri, 16 Feb 2018 12:00:38 -0800 [thread overview]
Message-ID: <9f77b568-d86c-47db-f7a3-ddb931f33af0@linux.intel.com> (raw)
In-Reply-To: <4542D3AE-6A4F-45AD-AD70-8DFA9503071A@gmail.com>
On 02/16/2018 11:54 AM, Nadav Amit wrote:
>> But I don't really want to hide that gunk in a macro like that. It
>> might make more sense as a static inline. I'll give that a shot and resent.
> Since determining whether PTI is on is done in several places in the kernel,
> maybe there should a single function to determine whether PTI is on,
> something like:
>
> static inline bool is_pti_on(void)
> {
> return IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION) &&
> static_cpu_has(X86_FEATURE_PTI);
> }
We should be able to do it with disabled-features.h and the X86_FEATURE
bit. I'll look into it.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2018-02-16 20:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-15 13:20 [PATCH 0/3] Use global pages with PTI Dave Hansen
2018-02-15 13:20 ` [PATCH 1/3] x86/mm: factor out conditional pageattr PTE bit setting code Dave Hansen
2018-02-15 13:20 ` [PATCH 2/3] x86/mm: introduce __PAGE_KERNEL_GLOBAL Dave Hansen
2018-02-16 17:47 ` Nadav Amit
2018-02-16 18:03 ` Dave Hansen
2018-02-16 18:25 ` Nadav Amit
2018-02-16 19:06 ` Dave Hansen
2018-02-16 19:54 ` Nadav Amit
2018-02-16 20:00 ` Dave Hansen [this message]
2018-02-16 23:19 ` Dave Hansen
2018-02-15 13:20 ` [PATCH 3/3] x86/pti: enable global pages for shared areas Dave Hansen
2018-02-15 17:47 ` [PATCH 0/3] Use global pages with PTI Linus Torvalds
2018-02-15 18:13 ` Dave Hansen
2018-02-15 23:55 ` Dave Hansen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9f77b568-d86c-47db-f7a3-ddb931f33af0@linux.intel.com \
--to=dave.hansen@linux.intel.com \
--cc=hughd@google.com \
--cc=jgross@suse.com \
--cc=keescook@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@kernel.org \
--cc=nadav.amit@gmail.com \
--cc=torvalds@linux-foundation.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).