linux-kernel - Re: [Xen-devel] [PATCH v5 0/9] Improve non-"safe" MSR access failure handling

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Date:	Tue, 5 Apr 2016 11:38:06 -0400
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>
Cc:	KVM list <kvm@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, xen-devel <Xen-devel@...ts.xen.org>,
	Borislav Petkov <bp@...en8.de>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [Xen-devel] [PATCH v5 0/9] Improve non-"safe" MSR access failure
 handling

On 04/02/2016 10:01 AM, Andy Lutomirski wrote:
>
> Andy Lutomirski (9):
>    x86/head: Pass a real pt_regs and trapnr to early_fixup_exception
>    x86/head: Move the early NMI fixup into C
>    x86/head: Move early exception panic code into early_fixup_exception
>    x86/traps: Enable all exception handler callbacks early
>    x86/paravirt: Add _safe to the read_msr and write_msr PV hooks
>    x86/msr: Carry on after a non-"safe" MSR access fails
>    x86/paravirt: Add paravirt_{read,write}_msr
>    x86/paravirt: Make "unsafe" MSR accesses unsafe even if PARAVIRT=y
>    x86/msr: Set the return value to zero when native_rdmsr_safe fails

With Xen (on top of eb1af3b):

Tested-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>

-boris