linux-kernel - Re: [PATCH] x86/paravirt: Ensure calls to pv

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Date: Mon, 20 May 2024 12:08:08 +1000
From: Jordan Niethe <jniethe@...dia.com>
To: Borislav Petkov <bp@...en8.de>
Cc: linux-kernel@...r.kernel.org, jgross@...e.com, ajay.kaher@...adcom.com,
 alexey.amakhalov@...adcom.com, tglx@...utronix.de, mingo@...hat.com,
 dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
 peterz@...radead.org
Subject: Re: [PATCH] x86/paravirt: Ensure calls to pv_op functions are RIP
 relative

Borislav Petkov wrote:
> On Fri, May 17, 2024 at 12:42:24PM +1000, Jordan Niethe wrote:
>> This has been observed at lower levels of compiler optimisation but
>> there is nothing preventing it from occurring generally.
> 
> How can I reproduce this?
> 
> Thx.
> 

Hi,

I run into this building a module that used paravirtual operations with -O1.

I'll try and get a minimal reproducing example.

Thanks,
Jordan.