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Date: Wed, 13 May 2020 09:12:07 +0200 From: Jürgen Groß <jgross@...e.com> To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org> Cc: x86@...nel.org, "Paul E. McKenney" <paulmck@...nel.org>, Andy Lutomirski <luto@...nel.org>, Alexandre Chartre <alexandre.chartre@...cle.com>, Frederic Weisbecker <frederic@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>, Sean Christopherson <sean.j.christopherson@...el.com>, Masami Hiramatsu <mhiramat@...nel.org>, Petr Mladek <pmladek@...e.com>, Steven Rostedt <rostedt@...dmis.org>, Joel Fernandes <joel@...lfernandes.org>, Boris Ostrovsky <boris.ostrovsky@...cle.com>, Brian Gerst <brgerst@...il.com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Josh Poimboeuf <jpoimboe@...hat.com>, Will Deacon <will@...nel.org>, Tom Lendacky <thomas.lendacky@....com>, Wei Liu <wei.liu@...nel.org>, Michael Kelley <mikelley@...rosoft.com>, Jason Chen CJ <jason.cj.chen@...el.com>, Zhao Yakui <yakui.zhao@...el.com>, "Peter Zijlstra (Intel)" <peterz@...radead.org> Subject: Re: [patch V5 02/38] x86/entry/64: Use native swapgs in asm_native_load_gs_index() On 12.05.20 23:01, Thomas Gleixner wrote: > When PARAVIRT_XXL is in use, then load_gs_index() uses > xen_load_gs_index() and (asm_))native_load_gs_index() is unused. > > It's therefore pointless to use the paravirtualized SWAPGS implementation > in asm_native_load_gs_index(). Switch it to a plain swapgs. > > Signed-off-by: Thomas Gleixner <tglx@...utronix.de> > Cc: Juergen Gross <jgross@...e.com> Acked-by: Juergen Gross <jgross@...e.com> Juergen
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