From: Peter Zijlstra <peterz@infradead.org>
To: x86@kernel.org, tony.luck@intel.com, pjt@google.com
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
r.marek@assembler.cz, jpoimboe@redhat.com, jikos@kernel.org
Subject: [RFC][PATCH 0/2] x86/retpoline: Retpoline on a diet
Date: Thu, 18 Feb 2021 17:59:38 +0100 [thread overview]
Message-ID: <20210218165938.213678824@infradead.org> (raw)
Hi!
The first patch rearranges the implementation and consolidates unused bytes.
The second patch uses INT3 over LFENCE to shrink the retpoline to 15 bytes, by
which 4 can live in a cacheline.
Patches have been boot tested on my IVB.
next reply other threads:[~2021-02-18 19:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-18 16:59 Peter Zijlstra [this message]
2021-02-18 16:59 ` [RFC][PATCH 1/2] x86/retpoline: Simplify retpolines Peter Zijlstra
2021-02-22 11:36 ` Peter Zijlstra
2021-02-18 16:59 ` [RFC][PATCH 2/2] x86/retpoline: Compress retpolines Peter Zijlstra
2021-02-19 7:14 ` Borislav Petkov
2021-02-22 11:27 ` Peter Zijlstra
2021-02-18 18:46 ` [RFC PATCH] x86/retpolines: Prevent speculation after RET Borislav Petkov
2021-02-18 19:02 ` Peter Zijlstra
2021-02-18 19:11 ` Borislav Petkov
2021-02-19 8:15 ` Peter Zijlstra
2021-02-19 12:08 ` Andrew Cooper
2021-02-19 9:28 ` David Laight
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