linux-kernel - Re: [RFC KVM 05/27] KVM: x86: Add handler to exit kvm isolation

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Message-ID: <40427143-4d13-0583-9182-c38d51d6f9eb@oracle.com>
Date:   Mon, 13 May 2019 18:10:08 +0200
From:   Alexandre Chartre <alexandre.chartre@...cle.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krcmar <rkrcmar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        kvm list <kvm@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        jan.setjeeilers@...cle.com, Liran Alon <liran.alon@...cle.com>,
        Jonathan Adams <jwadams@...gle.com>
Subject: Re: [RFC KVM 05/27] KVM: x86: Add handler to exit kvm isolation



On 5/13/19 5:49 PM, Andy Lutomirski wrote:
> On Mon, May 13, 2019 at 7:39 AM Alexandre Chartre
> <alexandre.chartre@...cle.com> wrote:
>>
>> From: Liran Alon <liran.alon@...cle.com>
>>
>> Interrupt handlers will need this handler to switch from
>> the KVM address space back to the kernel address space
>> on their prelog.
> 
> This patch doesn't appear to do anything at all.  What am I missing?
> 

Let me check. It looks like I trimmed the code invoking the handler from
IRQ (to exit isolation when there's an IRQ). Probably a bad merge at some
point. Sorry.

alex.