linux-kernel - Re: [PATCH 01/11] x86/entry: Use swapgs and native_iret directly in swapgs_restore_regs_and_return_to

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Message-ID: <0f932791-5c8b-b1b7-1d47-15159f55da10@suse.com>
Date:   Mon, 13 Dec 2021 13:13:04 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     x86@...nel.org, xen-devel@...ts.xenproject.org,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 01/11] x86/entry: Use swapgs and native_iret directly in
 swapgs_restore_regs_and_return_to_usermode

On 08.12.21 12:08, Lai Jiangshan wrote:
> From: Lai Jiangshan <laijs@...ux.alibaba.com>
> 
> swapgs_restore_regs_and_return_to_usermode() is used in native code
> (non-xenpv) only now, so it doesn't need the PV-aware SWAPGS and
> INTERRUPT_RETURN.
> 
> Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen

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