RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction

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Subject: RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction
From: David Laight <David.Laight@xxxxxxxxxx>
Date: Fri, 21 Jul 2023 14:07:17 +0000
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Cc: KY Srinivasan <kys@xxxxxxxxxxxxx>, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>, "wei.liu@xxxxxxxxxx" <wei.liu@xxxxxxxxxx>, Dexuan Cui <decui@xxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "bp@xxxxxxxxx" <bp@xxxxxxxxx>, "dave.hansen@xxxxxxxxxxxxxxx" <dave.hansen@xxxxxxxxxxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-hyperv@xxxxxxxxxxxxxxx" <linux-hyperv@xxxxxxxxxxxxxxx>, "stable@xxxxxxxxxxxxxxx" <stable@xxxxxxxxxxxxxxx>
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Thread-topic: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction

...
> I realized in the middle of the night that my reply was nonsense. :-(
> pr_warn() makes the message visible when pr_info() might not.  I'm
> happy to change to pr_warn().

PANIC_ON_WARN??

	David

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Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)

Follow-Ups:
- RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction
  - From: Michael Kelley (LINUX)

References:
- [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction
  - From: Michael Kelley
- Re: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction
  - From: Peter Zijlstra
- RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction
  - From: Michael Kelley (LINUX)
- RE: [PATCH 1/1] x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction
  - From: Michael Kelley (LINUX)

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