linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Julien Thierry <julien.thierry@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Andy Lutomirski <luto@amacapital.net>,
	Ingo Molnar <mingo@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	James Morse <james.morse@arm.com>,
	valentin.schneider@arm.com, Brian Gerst <brgerst@gmail.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Juergen Gross <jgross@suse.com>
Subject: Re: [PATCH 1/8] kasan,x86: Frob kasan_report() in an exception
Date: Wed, 6 Mar 2019 09:59:11 -0800	[thread overview]
Message-ID: <CAHk-=wiDfi_=hny1hDCrxaEUUcgvykaWXt4f1qn+pt1RD1OFLQ@mail.gmail.com> (raw)
In-Reply-To: <20190306173715.GA32534@hirez.programming.kicks-ass.net>

On Wed, Mar 6, 2019 at 9:37 AM Peter Zijlstra <peterz@infradead.org> wrote:
>
> The below seems to 'work'.

Yeah, and makes things cheaper for the non-SMAP case too. Looks sane.

One note:

 +       asm volatile (ALTERNATIVE("", "pushf; pop %0; "
__stringify(__ASM_CLAC),

Hmm. Every single use of __ASM_CLAC is together with "__stringity()".

Maybe we could just get rid of that oddity, and just make __ASM_CLAC
be a string to begin with.

At one point it was used bare in the __ASSEMBLY__ version, but that
does not appear to the case any more since commit 669f8a900198
("x86/smap: Use ALTERNATIVE macro") back in 2015.

                 Linus

  reply	other threads:[~2019-03-06 17:59 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-28 14:54 [PATCH 0/8] objtool: UACCESS validation v2 Peter Zijlstra
2019-02-28 14:54 ` [PATCH 1/8] kasan,x86: Frob kasan_report() in an exception Peter Zijlstra
2019-02-28 15:22   ` Dmitry Vyukov
2019-02-28 15:45     ` Peter Zijlstra
2019-02-28 15:52       ` Dmitry Vyukov
2019-02-28 16:01         ` Andrey Ryabinin
2019-02-28 16:03       ` Dmitry Vyukov
2019-02-28 17:46         ` Peter Zijlstra
2019-02-28 18:18           ` Dmitry Vyukov
2019-03-01 14:45     ` Peter Zijlstra
2019-03-01 15:06       ` Dmitry Vyukov
2019-03-01 15:23         ` Peter Zijlstra
2019-03-06 13:13           ` Peter Zijlstra
2019-03-06 13:39             ` Dmitry Vyukov
2019-03-06 13:57               ` Peter Zijlstra
2019-03-06 14:01                 ` Dmitry Vyukov
2019-03-06 14:12                   ` Peter Zijlstra
2019-03-06 14:34                     ` Peter Zijlstra
2019-03-06 14:40                       ` Dmitry Vyukov
2019-03-06 14:41                         ` Dmitry Vyukov
2019-03-06 14:55                         ` Peter Zijlstra
2019-03-06 15:01                           ` Dmitry Vyukov
2019-03-06 17:14             ` Peter Zijlstra
2019-03-06 17:27               ` Linus Torvalds
2019-03-06 17:37               ` Peter Zijlstra
2019-03-06 17:59                 ` Linus Torvalds [this message]
2019-03-07 13:49                   ` Peter Zijlstra
2019-02-28 14:54 ` [PATCH 2/8] x86/ia32: Fix ia32_restore_sigcontext AC leak Peter Zijlstra
2019-02-28 14:54 ` [PATCH 3/8] objtool: Set insn->func for alternatives Peter Zijlstra
2019-02-28 14:54 ` [PATCH 4/8] objtool: Hande function aliases Peter Zijlstra
2019-02-28 14:54 ` [PATCH 5/8] objtool: Rewrite add_ignores() Peter Zijlstra
2019-02-28 14:54 ` [PATCH 6/8] i915,uaccess: Fix redundant CLAC Peter Zijlstra
2019-02-28 15:10   ` Chris Wilson
2019-02-28 15:24     ` Peter Zijlstra
2019-02-28 16:49   ` Linus Torvalds
2019-02-28 17:51     ` Peter Zijlstra
2019-02-28 18:01       ` Peter Zijlstra
2019-02-28 18:29         ` Linus Torvalds
2019-02-28 19:01           ` Peter Zijlstra
2019-03-01 10:34             ` Peter Zijlstra
2019-03-01 12:27               ` Peter Zijlstra
2019-03-01 12:57                 ` Peter Zijlstra
2019-03-01 14:38                   ` Peter Zijlstra
2019-03-01 15:27                     ` Andy Lutomirski
2019-03-01 16:15                   ` Linus Torvalds
2019-03-01 16:17               ` Linus Torvalds
2019-02-28 14:54 ` [PATCH 7/8] objtool: Add UACCESS validation Peter Zijlstra
2019-02-28 14:54 ` [PATCH 8/8] objtool: Add Direction Flag validation Peter Zijlstra

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='CAHk-=wiDfi_=hny1hDCrxaEUUcgvykaWXt4f1qn+pt1RD1OFLQ@mail.gmail.com' \
    --to=torvalds@linux-foundation.org \
    --cc=aryabinin@virtuozzo.com \
    --cc=bp@alien8.de \
    --cc=brgerst@gmail.com \
    --cc=catalin.marinas@arm.com \
    --cc=dvlasenk@redhat.com \
    --cc=dvyukov@google.com \
    --cc=hpa@zytor.com \
    --cc=james.morse@arm.com \
    --cc=jgross@suse.com \
    --cc=jpoimboe@redhat.com \
    --cc=julien.thierry@arm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=luto@amacapital.net \
    --cc=luto@kernel.org \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=valentin.schneider@arm.com \
    --cc=will.deacon@arm.com \
    /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).