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Groups > linux.kernel > #1191655
| From | Julien Grall <julien.grall@citrix.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition |
| Date | 2015-07-24 12:00 +0200 |
| Message-ID | <pPHVN-2bg-23@gated-at.bofh.it> (permalink) |
| References | <pKqVz-4Ye-3@gated-at.bofh.it> <pKqVA-4Ye-15@gated-at.bofh.it> <pPHsK-1CX-15@gated-at.bofh.it> <pPHM5-1ZQ-7@gated-at.bofh.it> <pPHM5-1ZQ-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 24/07/15 10:48, David Vrabel wrote: > On 24/07/15 10:39, Julien Grall wrote: >> Hi David, >> >> On 24/07/15 10:28, David Vrabel wrote: >>> On 09/07/15 21:42, Julien Grall wrote: >>>> The Xen hypercall interface is always using 4K page granularity on ARM >>>> and x86 architecture. >>>> >>>> With the incoming support of 64K page granularity for ARM64 guest, it >>>> won't be possible to re-use the Linux page definition in Xen drivers. >>>> >>>> Introduce Xen page definition helpers based on the Linux page >>>> definition. They have exactly the same name but prefixed with >>>> XEN_/xen_ prefix. >>>> >>>> Also modify page_to_pfn to use new Xen page definition. >>>> >>>> Signed-off-by: Julien Grall <julien.grall@citrix.com> >>>> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> >>>> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> >>>> Cc: David Vrabel <david.vrabel@citrix.com> >>>> --- >>>> I'm wondering if we should drop page_to_pfn has the macro will likely >>>> misuse when Linux is using 64KB page granularity. >>> >>> I think we want xen_gfn_to_page() and xen_page_to_gfn() and Xen >>> front/back drivers never deal with PFNs only GFNs. >> >> What is xen_gfn_to_page and xen_page_to_gfn? Neither Linux, nor my >> series have them. > > I suggesting that you introduce these. It's still not clear to me what you are suggesting here... Do you suggest to rename xen_pfn_to_page and xen_page_to_pfn by xen_gfn_to_page and xen_page_to_gfn? Regards, -- Julien Grall -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition David Vrabel <david.vrabel@citrix.com> - 2015-07-24 11:30 +0200
Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition David Vrabel <david.vrabel@citrix.com> - 2015-07-24 11:50 +0200
Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition Julien Grall <julien.grall@citrix.com> - 2015-07-24 12:00 +0200
Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition David Vrabel <david.vrabel@citrix.com> - 2015-07-24 12:40 +0200
Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition Ian Campbell <ian.campbell@citrix.com> - 2015-07-24 12:50 +0200
Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition Julien Grall <julien.grall@citrix.com> - 2015-07-24 15:10 +0200
Re: [Xen-devel] [PATCH v2 01/20] xen: Add Xen specific page definition Julien Grall <julien.grall@citrix.com> - 2015-07-24 11:50 +0200
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