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Date:   Tue, 19 May 2020 17:29:43 -0700
From:   Andy Lutomirski <>
To:     Thomas Gleixner <>
Cc:     LKML <>, X86 ML <>,
        "Paul E. McKenney" <>,
        Andy Lutomirski <>,
        Alexandre Chartre <>,
        Frederic Weisbecker <>,
        Paolo Bonzini <>,
        Sean Christopherson <>,
        Masami Hiramatsu <>,
        Petr Mladek <>,
        Steven Rostedt <>,
        Joel Fernandes <>,
        Boris Ostrovsky <>,
        Juergen Gross <>,
        Brian Gerst <>,
        Mathieu Desnoyers <>,
        Josh Poimboeuf <>,
        Will Deacon <>,
        Tom Lendacky <>,
        Wei Liu <>,
        Michael Kelley <>,
        Jason Chen CJ <>,
        Zhao Yakui <>,
        "Peter Zijlstra (Intel)" <>
Subject: Re: [patch V6 23/37] x86/entry: Provide IDTENTRY_SYSVEC

On Fri, May 15, 2020 at 5:10 PM Thomas Gleixner <> wrote:
> Provide a IDTENTRY variant for system vectors to consolidate the different
> mechanisms to emit the ASM stubs for 32 an 64 bit.
> On 64bit this also moves the stack switching from ASM to C code. 32bit will
> excute the system vectors w/o stack switching as before. As some of the
> system vector handlers require access to pt_regs this requires a new stack
> switching macro which can handle an argument.

Is that last sentence obsolete?


Acked-by: Andy Lutomirski <>

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