linux-kernel - Re: [PATCH 1/2] x86/xen: Make the boot CPU idle task reliable

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Message-ID: <1b98d601-d9d9-879c-918c-737830d80ac5@oracle.com>
Date:   Mon, 16 Mar 2020 10:33:27 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Miroslav Benes <mbenes@...e.cz>, jgross@...e.com,
        sstabellini@...nel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, jpoimboe@...hat.com
Cc:     x86@...nel.org, xen-devel@...ts.xenproject.org,
        linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
        jslaby@...e.cz
Subject: Re: [PATCH 1/2] x86/xen: Make the boot CPU idle task reliable



On 3/12/20 10:20 AM, Miroslav Benes wrote:
> --- a/arch/x86/xen/xen-head.S
> +++ b/arch/x86/xen/xen-head.S
> @@ -35,7 +35,7 @@ SYM_CODE_START(startup_xen)
>  	rep __ASM_SIZE(stos)
>  
>  	mov %_ASM_SI, xen_start_info
> -	mov $init_thread_union+THREAD_SIZE, %_ASM_SP
> +	mov $init_thread_union+THREAD_SIZE-SIZEOF_PTREGS, %_ASM_SP

This is initial_stack, isn't it?

-boris