From: Ian Campbell <ian.campbell@citrix.com>
To: "Chen, Tiejun" <tiejun.chen@intel.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 03:21:55 +0100 [thread overview]
Message-ID: <1409106115.28009.86.camel@citrix.com> (raw)
In-Reply-To: <53FD3A56.5020205@intel.com>
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/ ?
Ian.
next prev parent reply other threads:[~2014-08-27 2:21 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 [this message]
2014-08-27 2:28 ` Chen, Tiejun
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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