linux-kernel - Re: [PATCH 8/9] x86/tlb: Privatize cpu

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Date:   Mon, 17 Jun 2019 17:10:52 +0000
From:   Nadav Amit <namit@...are.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        the arch/x86 maintainers <x86@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>
Subject: Re: [PATCH 8/9] x86/tlb: Privatize cpu_tlbstate

> On Jun 14, 2019, at 8:58 AM, Sean Christopherson <sean.j.christopherson@...el.com> wrote:
> 
> On Wed, Jun 12, 2019 at 11:48:12PM -0700, Nadav Amit wrote:
>> diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
>> index 79272938cf79..a1fea36d5292 100644
>> --- a/arch/x86/include/asm/tlbflush.h
>> +++ b/arch/x86/include/asm/tlbflush.h
> 
> ...
> 
>> @@ -439,6 +442,7 @@ static inline void __native_flush_tlb_one_user(unsigned long addr)
>> {
>> 	u32 loaded_mm_asid = this_cpu_read(cpu_tlbstate.loaded_mm_asid);
>> 
>> +	//invpcid_flush_one(kern_pcid(loaded_mm_asid), addr);
> 
> Leftover debug/testing code.

Indeed, thanks. I will fix on v2 (once I get some more feedback).