linux-kernel - Re: [PATCH 5/6] x86/paravirt: Switch MSR access pv

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Message-ID: <6cc20ef6-d8e5-4c74-89d9-6a949c84b397@suse.com>
Date: Tue, 13 May 2025 08:06:02 +0200
From: Jürgen Groß <jgross@...e.com>
To: Xin Li <xin@...or.com>, linux-kernel@...r.kernel.org, x86@...nel.org,
 virtualization@...ts.linux.dev
Cc: Ajay Kaher <ajay.kaher@...adcom.com>,
 Alexey Makhalov <alexey.amakhalov@...adcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Thomas Gleixner
 <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 "H. Peter Anvin" <hpa@...or.com>,
 Boris Ostrovsky <boris.ostrovsky@...cle.com>, xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 5/6] x86/paravirt: Switch MSR access pv_ops functions to
 instruction interfaces

On 13.05.25 07:55, Xin Li wrote:
> On 5/12/2025 4:24 AM, Juergen Gross wrote:
>> Now with the mentioned patch really attached. :-)
>>
> 
> Does it allow patching with an instruction more than 6 bytes long?
> 
> The immediate form MSR instructions are 9 bytes long.

Yes, shouldn't be a problem.

Juergen

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