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Date: Thu, 15 Feb 2018 20:22:09 -0800
From: Andi Kleen <ak@linux.intel.com>
To: Jim Mattson <jmattson@google.com>
Cc: KarimAllah Ahmed <karahmed@amazon.de>, kvm list <kvm@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	the arch/x86 maintainers <x86@kernel.org>,
	Ashok Raj <ashok.raj@intel.com>,
	Asit Mallick <asit.k.mallick@intel.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Arjan Van De Ven <arjan.van.de.ven@intel.com>,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrea Arcangeli <aarcange@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Dan Williams <dan.j.williams@intel.com>,
	Jun Nakajima <jun.nakajima@intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Greg KH <gregkh@linuxfoundation.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	David Woodhouse <dwmw@amazon.co.uk>
Subject: Re: [PATCH v6 2/5] KVM: x86: Add IBPB support
Message-ID: <20180216042209.GB3231@tassilo.jf.intel.com>
References: <1517522386-18410-1-git-send-email-karahmed@amazon.de>
 <1517522386-18410-3-git-send-email-karahmed@amazon.de>
 <CALMp9eQEjaaK=RDZ3OFL5+fq78nWRrpVO-KJ8ruosV9vWjfW6g@mail.gmail.com>
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> > +               wrmsrl(MSR_IA32_PRED_CMD, PRED_CMD_IBPB);
> 
> Should this be wrmsrl_safe? I don't see where we've verified host
> support of this MSR.

In mainline all wrmsr are wrmsrl_safe now.

-Andi