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Re: [PATCH v2 2/7] kernel/resource: move and rename IORESOURCE_MEM_DRIVER_MANAGED
- To: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
- From: David Hildenbrand <david@xxxxxxxxxx>
- Date: Tue, 15 Sep 2020 09:37:09 +0200
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- Cc: linux-kernel@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-acpi@xxxxxxxxxxxxxxx, linux-nvdimm@xxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Ard Biesheuvel <ardb@xxxxxxxxxx>, Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>, Baoquan He <bhe@xxxxxxxxxx>, Eric Biederman <ebiederm@xxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, kexec@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 15 Sep 2020 07:37:27 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15.09.20 04:20, Wei Yang wrote:
> On Tue, Sep 08, 2020 at 10:10:07PM +0200, David Hildenbrand wrote:
>> IORESOURCE_MEM_DRIVER_MANAGED currently uses an unused PnP bit, which is
>> always set to 0 by hardware. This is far from beautiful (and confusing),
>> and the bit only applies to SYSRAM. So let's move it out of the
>> bus-specific (PnP) defined bits.
>>
>> We'll add another SYSRAM specific bit soon. If we ever need more bits for
>> other purposes, we can steal some from "desc", or reshuffle/regroup what we
>> have.
>
> I think you make this definition because we use IORESOURCE_SYSRAM_RAM for
> hotpluged memory? So we make them all in IORESOURCE_SYSRAM_XXX family?
Yeah, to specify based on the extended MEM type SYSRAM. Because it
really only applies to that.
--
Thanks,
David / dhildenb
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