linux-kernel - Re: [PATCH v3 3/5] x86/paravirt: Add paravirt_{read,write}

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Message-ID: <56E6C492.5060308@redhat.com>
Date:	Mon, 14 Mar 2016 15:02:58 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	KVM list <kvm@...r.kernel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	xen-devel <Xen-devel@...ts.xen.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v3 3/5] x86/paravirt: Add paravirt_{read,write}_msr



On 11/03/2016 20:06, Andy Lutomirski wrote:
> This adds paravirt hooks for unsafe MSR access.  On native, they
> call native_{read,write}_msr.  On Xen, they use
> xen_{read,write}_msr_safe.
> 
> Nothing uses them yet for ease of bisection.  The next patch will
> use them in rdmsrl, wrmsrl, etc.
> 
> I intentionally didn't make them OOPS on #GP on Xen.  I think that
> should be done separately by the Xen maintainers.

Please do the same for KVM.

Paolo