From: Peter Zijlstra <peterz@infradead.org>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
Ashok Raj <ashok.raj@intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Greg KH <gregkh@linuxfoundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Arjan Van De Ven <arjan.van.de.ven@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Jun Nakajima <jun.nakajima@intel.com>,
Asit Mallick <asit.k.mallick@intel.com>
Subject: Re: [PATCH 0/7] objtool: retpoline validation
Date: Thu, 1 Feb 2018 18:14:27 +0100 [thread overview]
Message-ID: <20180201171427.GD2249@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <1517503895.18619.319.camel@infradead.org>
On Thu, Feb 01, 2018 at 04:51:35PM +0000, David Woodhouse wrote:
> > Ideally we'd have a way to mark the module 'unsafe' or something.
>
> No, we just need to set IBRS before doing it.
That would work, assuming IBRS is available to begin with of course. Do
we WARN if we hit this code and don't have IBRS available?
> The same applies to any
> EFI runtime calls, APM and all kinds of other random crap that calls
> into firmware. I'm not sure why those aren't showing up.
arch/x86/platform/efi/Makefile:OBJECT_FILES_NON_STANDARD_efi_thunk_$(BITS).o := y
arch/x86/platform/efi/Makefile:OBJECT_FILES_NON_STANDARD_efi_stub_$(BITS).o := y
And similar things tell objtool to please not look..
next prev parent reply other threads:[~2018-02-01 17:14 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-01 14:34 [PATCH 0/7] objtool: retpoline validation Peter Zijlstra
2018-02-01 14:34 ` [PATCH 1/7] objtool: Use existing global variables for options Peter Zijlstra
2018-02-01 14:34 ` [PATCH 2/7] objtool: Add retpoline validation Peter Zijlstra
2018-02-01 14:34 ` [PATCH 3/7] objtool: Add module specific retpoline rules Peter Zijlstra
2018-02-01 14:34 ` [PATCH 4/7] x86,nospec: Annotate indirect calls/jumps Peter Zijlstra
2018-02-01 14:55 ` David Woodhouse
2018-02-01 15:11 ` Peter Zijlstra
2018-02-01 15:13 ` Peter Zijlstra
2018-02-01 15:21 ` Josh Poimboeuf
2018-02-01 15:30 ` Peter Zijlstra
2018-02-01 14:34 ` [PATCH 5/7] x86/paravirt: Annotate indirect calls Peter Zijlstra
2018-02-01 14:34 ` [PATCH 6/7] x86: Annotate indirect jump in head_64.S Peter Zijlstra
2018-02-01 14:34 ` [PATCH 7/7] x86,sme: Annotate indirect call Peter Zijlstra
2018-02-01 15:28 ` [PATCH 0/7] objtool: retpoline validation Josh Poimboeuf
2018-02-01 15:32 ` David Woodhouse
2018-02-01 15:40 ` Peter Zijlstra
2018-02-01 16:51 ` David Woodhouse
2018-02-01 17:14 ` Peter Zijlstra [this message]
2018-02-01 17:43 ` Josh Poimboeuf
2018-02-01 18:16 ` Tim Chen
2018-02-06 21:23 ` David Woodhouse
2018-02-01 15:32 ` Peter Zijlstra
2018-02-01 19:36 ` Peter Zijlstra
2018-02-01 15:50 ` Josh Poimboeuf
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