linux-kernel - Re: [PATCH v7 08/18] virt: acrn: Introduce EPT mapping management

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Date:   Mon, 11 Jan 2021 12:03:21 +0800
From:   Shuo A Liu <shuo.a.liu@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Yu Wang <yu1.wang@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Zhi Wang <zhi.a.wang@...el.com>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>
Subject: Re: [PATCH v7 08/18] virt: acrn: Introduce EPT mapping management

On Fri  8.Jan'21 at 16:34:06 +0100, Greg Kroah-Hartman wrote:
>On Wed, Jan 06, 2021 at 03:50:45PM +0800, shuo.a.liu@...el.com wrote:
>> +/**
>> + * struct acrn_vm_memmap - A EPT memory mapping info for a User VM.
>> + * @type:		Type of the memory mapping (ACRM_MEMMAP_*).
>> + *			Pass to hypervisor directly.
>> + * @attr:		Attribute of the memory mapping.
>> + *			Pass to hypervisor directly.
>> + * @user_vm_pa:		Physical address of User VM.
>> + *			Pass to hypervisor directly.
>> + * @service_vm_pa:	Physical address of Service VM.
>> + *			Pass to hypervisor directly.
>> + * @vma_base:		VMA address of Service VM. Pass to hypervisor directly.
>> + * @len:		Length of the memory mapping.
>> + *			Pass to hypervisor directly.
>> + */
>> +struct acrn_vm_memmap {
>> +	__u32	type;
>> +	__u32	attr;
>> +	__u64	user_vm_pa;
>> +	union {
>> +		__u64	service_vm_pa;
>> +		__u64	vma_base;
>> +	};
>> +	__u64	len;
>> +};
>
>Endianness?

Same consideration within patch 06/18. Need i specify these values? They
are more like ioctls' paramter values.

Thanks
shuo
>