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Date: Sun, 21 Jan 2018 08:50:29 -0500
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: KarimAllah Ahmed <karahmed@amazon.de>
Cc: linux-kernel@vger.kernel.org, Andi Kleen <ak@linux.intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Andy Lutomirski <luto@kernel.org>,
        Arjan van de Ven <arjan@linux.intel.com>,
        Ashok Raj <ashok.raj@intel.com>,
        Asit Mallick <asit.k.mallick@intel.com>, Borislav Petkov <bp@suse.de>,
        Dan Williams <dan.j.williams@intel.com>,
        Dave Hansen <dave.hansen@intel.com>,
        David Woodhouse <dwmw@amazon.co.uk>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "H . Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
        Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>,
        Joerg Roedel <joro@8bytes.org>, Jun Nakajima <jun.nakajima@intel.com>,
        Laura Abbott <labbott@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Tom Lendacky <thomas.lendacky@amd.com>, kvm@vger.kernel.org,
        x86@kernel.org, Arjan Van De Ven <arjan.van.de.ven@intel.com>
Subject: Re: [RFC 10/10] x86/enter: Use IBRS on syscall and interrupts
Message-ID: <20180121135029.GM10086@char.us.oracle.com>
References: <1516476182-5153-1-git-send-email-karahmed@amazon.de>
 <1516476182-5153-11-git-send-email-karahmed@amazon.de>
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On Sat, Jan 20, 2018 at 08:23:01PM +0100, KarimAllah Ahmed wrote:
> From: Tim Chen <tim.c.chen@linux.intel.com>
> 
> Stop Indirect Branch Speculation on every user space to kernel space
> transition and reenable it when returning to user space./

How about interrupts?

That is should .macro interrupt have the same treatment?