linux-kernel - Re: Re: Re: Re: [PATCH] x86/bugs: KVM: Add support for SRSO_MSR

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Message-ID: <20250217202048.GIZ7OaIOWLH9Y05U-D@fat_crate.local>
Date: Mon, 17 Feb 2025 21:20:48 +0100
From: Borislav Petkov <bp@...en8.de>
To: Yosry Ahmed <yosry.ahmed@...ux.dev>
Cc: Sean Christopherson <seanjc@...gle.com>,
	Patrick Bellasi <derkling@...gle.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>, x86@...nel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Patrick Bellasi <derkling@...bug.net>,
	Brendan Jackman <jackmanb@...gle.com>
Subject: Re: Re: Re: Re: [PATCH] x86/bugs: KVM: Add support for SRSO_MSR_FIX

On Mon, Feb 17, 2025 at 11:56:22AM -0800, Yosry Ahmed wrote:
> I meant IBPB + MSR clear before going to userspace, or IBPB + MSR clear
> before a context switch.

Basically what I said already:

"Yes, let's keep it simple and do anything more involved *only* if it is
really necessary."

-- 
Regards/Gruss,
    Boris.

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