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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b988b8ff07
The grant v2 support was removed from the kernel with
commit 438b33c714 ("xen/grant-table:
remove support for V2 tables") as the higher memory footprint of v2
grants resulted in less grants being possible for a kernel compared
to the v1 grant interface.
As machines with more than 16TB of memory are expected to be more
common in the near future support of grant v2 is mandatory in order
to be able to run a Xen pv domain at any memory location.
So re-add grant v2 support basically by reverting above commit.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/******************************************************************************
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* grant_table.c
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* ARM specific part
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*
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* Granting foreign access to our memory reservation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <xen/interface/xen.h>
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#include <xen/page.h>
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#include <xen/grant_table.h>
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int arch_gnttab_map_shared(xen_pfn_t *frames, unsigned long nr_gframes,
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unsigned long max_nr_gframes,
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void **__shared)
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{
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return -ENOSYS;
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}
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void arch_gnttab_unmap(void *shared, unsigned long nr_gframes)
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{
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return;
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}
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int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes,
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unsigned long max_nr_gframes,
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grant_status_t **__shared)
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{
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return -ENOSYS;
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}
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int arch_gnttab_init(unsigned long nr_shared, unsigned long nr_status)
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{
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return 0;
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}
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