linux-kernel - Re: [PATCH v2 1/2] x86/msr: Carry on after a non-"safe" MSR access fails without !panic_on

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Message-ID: <56010D74.9020808@redhat.com>
Date:	Tue, 22 Sep 2015 10:12:36 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Andy Lutomirski <luto@...capital.net>,
	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	xen-devel <Xen-devel@...ts.xen.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KVM list <kvm@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v2 1/2] x86/msr: Carry on after a non-"safe" MSR access
 fails without !panic_on_oops



On 21/09/2015 19:43, Andy Lutomirski wrote:
> And maybe the KVM user return notifier.

No, not really.  If anything, the place in KVM where it makes a
difference is vmx_save_host_state, which is also only using
always-present MSRs.  But don't care about KVM.

First clean it up, then we can add back inline versions like __rdmsr or
rdmsr_fault or rdmsr_unsafe or whatever.

Paolo
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