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Date:   Fri, 21 Oct 2022 11:53:09 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Nathan Chancellor <nathan@kernel.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
        x86@kernel.org, Linus Torvalds <torvalds@linux-foundation.org>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Josh Poimboeuf <jpoimboe@kernel.org>,
        Andrew Cooper <Andrew.Cooper3@citrix.com>,
        Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
        Johannes Wikner <kwikner@ethz.ch>,
        Alyssa Milburn <alyssa.milburn@linux.intel.com>,
        Jann Horn <jannh@google.com>, "H.J. Lu" <hjl.tools@gmail.com>,
        Joao Moreira <joao.moreira@intel.com>,
        Joseph Nuzman <joseph.nuzman@intel.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Juergen Gross <jgross@suse.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        K Prateek Nayak <kprateek.nayak@amd.com>,
        Eric Dumazet <edumazet@google.com>
Subject: Re: [PATCH v3 48/59] x86/retbleed: Add SKL return thunk
Message-ID: <Y1JsBQAhDFB2C0OE@hirez.programming.kicks-ass.net>
References: <20220915111039.092790446@infradead.org>
 <20220915111147.890071690@infradead.org>
 <Y1HVZKW4o0KRsMtq@dev-arch.thelio-3990X>
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On Thu, Oct 20, 2022 at 04:10:28PM -0700, Nathan Chancellor wrote:
> This commit is now in -next as commit 5d8213864ade ("x86/retbleed: Add
> SKL return thunk"). I just bisected an immediate reboot on my AMD test
> system when starting a virtual machine with QEMU + KVM to it (see the
> bisect log below). My Intel test systems do not show this.
> Unfortunately, I do not have much more information, as there are no logs
> in journalctl, which makes sense as the reboot occurs immediately after
> I hit the enter key for the QEMU command.
> 
> If there is any further information I can provide or patches I can test
> for further debugging, I am more than happy to do so.

Moo :-(

you happen to have a .config for me?