On 11/06/2017 03:46 PM, Boris Ostrovsky wrote:
> On 11/02/2017 05:19 AM, Juergen Gross wrote:
>> In order to support Linux to run as a pv guest on machines with huge
>> memory (>16TB) or as a hvm guest with more than 16TB of memory the
>> kernel has to support grant table interface v2, as v1 is limited to
>> 32 bit frame numbers.
>>
>> This series re-adds that support (it has been removed in 2015) and
>> restricts usage of v2 to the features of v1 in order to support
>> migration to hosts which only support v1.
>>
>> V2 is selected only in the following cases:
>> - the user has specified v2 via module parameter
>> - in a pv guest if the maximum possible memory address of the host is
>> above 16TB (memory hotplug taken into account)
>> - in a hvm guest if the maximum guest memory address is above 16TB
>> (again with memory hotplug taken into account)
>>
>> Changes in V2:
>> - patch 2: remove update_trans_entry() from gnttab_ops (Boris Ostrovsky)
>> - added new patch 4
>> - patch 5: use cpuid on pv and max_possible_pfn on hvm for version select
>>
>> Juergen Gross (5):
>> xen: re-introduce support for grant v2 interface
>> xen: limit grant v2 interface to the v1 functionality
>> xen: add grant interface version dependent constants to gnttab_ops
>> xen: update arch/x86/include/asm/xen/cpuid.h
>> xen: select grant interface version
>>
>> arch/arm/xen/grant-table.c | 9 +-
>> arch/x86/include/asm/xen/cpuid.h | 42 +++++--
>> arch/x86/xen/grant-table.c | 60 +++++++++-
>> drivers/xen/grant-table.c | 244 +++++++++++++++++++++++++++++++++++----
>> include/xen/grant_table.h | 5 +-
>> 5 files changed, 318 insertions(+), 42 deletions(-)
>>
>
> Reviewed-by: Boris Ostrovsky <[email protected]>
Applied to for-linus-4.15.
-boris
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