linux-kernel - [PATCH v2 00/11] Fix up SRSO stuff

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Date:   Mon, 14 Aug 2023 13:44:26 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        David.Kaplan@....com, Andrew.Cooper3@...rix.com,
        jpoimboe@...nel.org, gregkh@...uxfoundation.org,
        nik.borisov@...e.com
Subject: [PATCH v2 00/11] Fix up SRSO stuff

Hi!

Second version of the SRSO fixes/cleanup.

I've redone some, reorderd most and left out the interface bits entirely for
now. Although I do strongly feel the extra interface is superfluous (and ugly).

This is based on top of current tip/x86/urgent 833fd800bf56.

The one open techinical issue I have with the mitigation is the alignment of
the RET inside srso_safe_ret(). The details given for retbleed stated that RET
should be on a 64byte boundary, which is not the case here.

I'll go prod at bringing the rest of the patches forward after I stare at some
other email.