linux-kernel - Re: [PATCH 21/23] x86, pcid, kaiser: allow flushing for future ASID switches

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Message-ID: <233ff2e6-92a8-d0e6-d456-7e71991f6aef@linux.intel.com>
Date:   Wed, 1 Nov 2017 14:06:59 -0700
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        moritz.lipp@...k.tugraz.at,
        Daniel Gruss <daniel.gruss@...k.tugraz.at>,
        michael.schwarz@...k.tugraz.at,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Kees Cook <keescook@...gle.com>,
        Hugh Dickins <hughd@...gle.com>, X86 ML <x86@...nel.org>
Subject: Re: [PATCH 21/23] x86, pcid, kaiser: allow flushing for future ASID
 switches

On 11/01/2017 02:04 PM, Andy Lutomirski wrote:
> Aha!  That wasn't at all clear to me from the changelog.  Can I make a
> totally different suggestion?  Add a new function
> __flush_tlb_one_kernel() and use it for kernel addresses. 

I'll look into this.