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From: "Chen, Tiejun" <tiejun.chen@intel.com>
To: Ian Campbell <ian.campbell@citrix.com>
Cc: kevin.tian@intel.com, stefano.stabellini@eu.citrix.com,
	ian.jackson@eu.citrix.com, xen-devel@lists.xen.org,
	JBeulich@suse.com, yang.z.zhang@intel.com
Subject: Re: [v4][PATCH 5/9] hvm_info_table: introduce nr_reserved_device_memory_map
Date: Wed, 27 Aug 2014 10:28:58 +0800	[thread overview]
Message-ID: <53FD426A.5050600@intel.com> (raw)
In-Reply-To: <1409106115.28009.86.camel@citrix.com>

On 2014/8/27 10:21, Ian Campbell wrote:
> On Wed, 2014-08-27 at 09:54 +0800, Chen, Tiejun wrote:
>> On 2014/8/27 4:38, Ian Campbell wrote:
>>> On Fri, 2014-08-22 at 18:09 +0800, Tiejun Chen wrote:
>>>> libxc can expose how many reserved device memory entries
>>>> hvmloader should get.
>>>
>>> "get" in what sense?
>>>
>>>>    And '0' means that doesn't exist so
>>>> we can skip this check.
>>>
>>> Which check?
>>>
>>> The code is trivial enough that I guess it is correct, and I don't
>>> expect a full explanation here (since I assume that comes in some future
>>> patch) but an accurate/meaningful quick indication would be useful here.
>>>
>>
>> Okay, I think I should describe this case explicitly as follows:
>>
>>       hvm_info_table: introduce nr_reserved_device_memory_map
>>
>>       libxc can expose how many reserved device memory entries to
>>       notify hvmloader.
>
> "libxc exposes to hvmloader the number of reserved device memory entries
> which are present" is what I think you are trying to say.
>
>> Then hvmloader would check if those reserved
>
> s/would/will/
>
>>       memory overlap current memory range in e820.
>>
>>       Note if nr_reserved_device_memory_map is '0', this means we have
>>       any reserved device memory so we can skip that check.
>
> s/any/no/ ?
>

Thanks for your revision kindly, so now,

     hvm_info_table: introduce nr_reserved_device_memory_map

     libxc exposes to hvmloader how many reserved device memory entries
     which are present. Then hvmloader will check if those reserved
     memory overlap current memory range in e820.

     Note if nr_reserved_device_memory_map is '0', this means we have
     no reserved device memory so we can skip that check.

     Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>

Thanks
Tiejun

  reply	other threads:[~2014-08-27  2:28 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-22 10:09 [v4][PATCH 0/9] xen: reserve RMRR to avoid conflicting MMIO/RAM Tiejun Chen
2014-08-22 10:09 ` [v4][PATCH 1/9] xen:vtd:rmrr: export acpi_rmrr_units Tiejun Chen
2014-08-22 10:09 ` [v4][PATCH 2/9] xen:x86: define a new hypercall to get RMRR mappings Tiejun Chen
2014-08-22 10:53   ` Andrew Cooper
2014-08-22 11:36     ` Jan Beulich
2014-08-25 11:03       ` Chen, Tiejun
2014-08-25 11:21     ` Chen, Tiejun
2014-08-25 12:07       ` Andrew Cooper
2014-08-26  3:12         ` Chen, Tiejun
2014-08-26  9:25           ` Andrew Cooper
2014-08-22 10:09 ` [v4][PATCH 3/9] tools:libxc: introduce hypercall for xc_reserved_device_memory_map Tiejun Chen
2014-08-22 10:55   ` Andrew Cooper
2014-08-25 11:11     ` Chen, Tiejun
2014-08-25 11:58       ` Andrew Cooper
2014-08-22 10:09 ` [v4][PATCH 4/9] tools:libxc: check if mmio BAR is out of RMRR mappings Tiejun Chen
2014-08-26 20:36   ` Ian Campbell
2014-08-27  1:46     ` Chen, Tiejun
2014-08-27  2:20       ` Ian Campbell
2014-08-27  2:40         ` Chen, Tiejun
2014-08-27  2:47           ` Chen, Tiejun
2014-08-22 10:09 ` [v4][PATCH 5/9] hvm_info_table: introduce nr_reserved_device_memory_map Tiejun Chen
2014-08-26 20:38   ` Ian Campbell
2014-08-27  1:54     ` Chen, Tiejun
2014-08-27  1:57       ` Chen, Tiejun
2014-08-27  2:21       ` Ian Campbell
2014-08-27  2:28         ` Chen, Tiejun [this message]
2014-08-22 10:09 ` [v4][PATCH 6/9] xen:x86:: support xc_reserved_device_memory_map in compat case Tiejun Chen
2014-08-22 10:09 ` [v4][PATCH 7/9] tools:firmware:hvmloader: introduce hypercall for xc_reserved_device_memory_map Tiejun Chen
2014-08-22 10:09 ` [v4][PATCH 8/9] tools:firmware:hvmloader: check to reserve RMRR mappings in e820 Tiejun Chen
2014-08-22 10:09 ` [v4][PATCH 9/9] xen:vtd: make USB RMRR mapping safe Tiejun Chen

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