linux-kernel - Re: [PATCH v2 10/18] x86/asm: Remap the TSS into the cpu entry area

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Message-ID: <CALCETrVgr87WPEMaEx4XJY-tJsPiSVrEMu2NiSLD_31BUDLb8w@mail.gmail.com>
Date:   Thu, 23 Nov 2017 18:40:23 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Borislav Petkov <bp@...e.de>
Cc:     Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Brian Gerst <brgerst@...il.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v2 10/18] x86/asm: Remap the TSS into the cpu entry area

On Thu, Nov 23, 2017 at 12:37 PM, Borislav Petkov <bp@...e.de> wrote:
> On Thu, Nov 23, 2017 at 12:15:14PM -0800, Andy Lutomirski wrote:
>> >> diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c
>> >> index b275863128eb..55858b277cf6 100644
>> >> --- a/arch/x86/kernel/asm-offsets.c
>> >> +++ b/arch/x86/kernel/asm-offsets.c
>> >> @@ -98,4 +98,7 @@ void common(void) {
>> >>       OFFSET(CPU_TSS_SYSENTER_stack, tss_struct, SYSENTER_stack);
>> >>       /* Size of SYSENTER_stack */
>> >>       DEFINE(SIZEOF_SYSENTER_stack, sizeof(((struct tss_struct *)0)->SYSENTER_stack));
>> >> +
>> >> +     /* Layout info for cpu_entry_area */
>> >> +     OFFSET(CPU_ENTRY_AREA_tss, cpu_entry_area, tss);
>> >
>> > The naming convention of those looks really strange. The beginning is in
>> > all caps and then small. Can we choose a convention pls.
>>
>> This is actually consistent with the rest of the offsets.  The
>> convention is STRUCT_field.
>
> Except CPU_TSS_SYSENTER_stack. TSS_STRUCT_SYSENTER_stack I guess.

Hmm, that name predates this series.  I'll clean it up in a new patch
at the end of the series.