linux-kernel - [patch V2 0/7] x86/kvm: RCU/context tracking and instrumentation protections

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Date:   Wed, 08 Jul 2020 21:51:53 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Paolo Bonzini <pbonzini@...hat.com>,
        kvm@...r.kernel.org,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juergen Gross <jgross@...e.com>
Subject: [patch V2 0/7] x86/kvm: RCU/context tracking and instrumentation protections

Folks,

this is a rebased and adopted version of the original series which is
available here:

     https://lore.kernel.org/r/20200519203128.773151484@linutronix.de
 
It deals with the RCU and context tracking state and the protection against
instrumentation in sensitive places:

  - Placing the guest_enter/exit() calls at the correct place

  - Moving the sensitive VMENTER/EXIT code into the non-instrumentable code
    section.

  - Fixup the tracing code to comply with the non-instrumentation rules

  - Use native functions to access CR2 and the GS base MSR in the critical
    code pathes to prevent them from being instrumented.

Thanks,

	tglx