linux-kernel - Re: [PATCH v3 1/7] x86/xen: remove 32-bit Xen PV guest support

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Date:   Sat, 8 Aug 2020 22:01:35 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH v3 1/7] x86/xen: remove 32-bit Xen PV guest support

On 8/7/20 4:38 AM, Juergen Gross wrote:
>  
>  void __init xen_reserve_top(void)
>  {
> -#ifdef CONFIG_X86_32
> -	unsigned long top = HYPERVISOR_VIRT_START;
> -	struct xen_platform_parameters pp;
> -
> -	if (HYPERVISOR_xen_version(XENVER_platform_parameters, &pp) == 0)
> -		top = pp.virt_start;
> -
> -	reserve_top_address(-top);
> -#endif	/* CONFIG_X86_32 */
>  }
>  


We should be able now to get rid of xen_reserve_top() altogether.


Other than that


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>


-boris