linux-kernel - Re: [RFC PATCH v2 2/3] arch/x86/acrn: Use HYPERVISOR_CALLBACK

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Date:   Mon, 8 Apr 2019 11:33:09 +0800
From:   "Zhao, Yakui" <yakui.zhao@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        Jason Chen CJ <jason.cj.chen@...el.com>
Subject: Re: [RFC PATCH v2 2/3] arch/x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR
 for Acrn upcall vector



On 2019年04月06日 03:07, Thomas Gleixner wrote:
> On Tue, 26 Mar 2019, Zhao Yakui wrote:
>> diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
>> index d9069bb..a8f4d08 100644
>> --- a/arch/x86/include/asm/hardirq.h
>> +++ b/arch/x86/include/asm/hardirq.h
>> @@ -37,7 +37,8 @@ typedef struct {
>>   #ifdef CONFIG_X86_MCE_AMD
>>   	unsigned int irq_deferred_error_count;
>>   #endif
>> -#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
>> +#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN) ||\
>> +		defined(CONFIG_ACRN_GUEST)
> 
> ..
> 
>> @@ -134,7 +134,8 @@ int arch_show_interrupts(struct seq_file *p, int prec)
>>   		seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
>>   	seq_puts(p, "  Machine check polls\n");
>>   #endif
>> -#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)
>> +#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN) ||\
>> +		defined(CONFIG_ACRN_GUEST)
>>   	if (test_bit(HYPERVISOR_CALLBACK_VECTOR, system_vectors)) {
>>   		seq_printf(p, "%*s: ", prec, "HYP");
>>   		for_each_online_cpu(j)
> 
> This starts to become unreadable. Please create a new config symbol:
> 
>       config X86_HV_CALLBACK_VECTOR
>       	def_bool
> 
> and select if from HYPERV, XEN and your new thing. That wants to be a
> separate preparatory patch at the beginning of the series please.

Thanks for the suggestion.
Sure. One new config will be added in next version.


> 
> Thanks,
> 
> 	tglx
>