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

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Date:   Mon, 10 Aug 2020 06:36:31 +0200
From:   Jürgen Groß <jgross@...e.com>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.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 09.08.20 04:01, Boris Ostrovsky wrote:
> 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.

Oh, yes.

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

Thanks,

Juergen