9ad95bdaca
Pull xen fixes from Juergen Gross:
"This contains two fixes for running under Xen:
- a fix avoiding resource conflicts between adding mmio areas and
memory hotplug
- a fix setting NX bits in page table entries copied from Xen when
running a PV guest"
* tag 'for-linus-4.15-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/balloon: Mark unallocated host memory as UNUSABLE
x86-64/Xen: eliminate W+X mappings
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/******************************************************************************
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* Xen balloon functionality
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*/
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#define RETRY_UNLIMITED 0
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struct balloon_stats {
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/* We aim for 'current allocation' == 'target allocation'. */
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unsigned long current_pages;
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unsigned long target_pages;
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unsigned long target_unpopulated;
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/* Number of pages in high- and low-memory balloons. */
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unsigned long balloon_low;
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unsigned long balloon_high;
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unsigned long total_pages;
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unsigned long schedule_delay;
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unsigned long max_schedule_delay;
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unsigned long retry_count;
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unsigned long max_retry_count;
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};
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extern struct balloon_stats balloon_stats;
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void balloon_set_new_target(unsigned long target);
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int alloc_xenballooned_pages(int nr_pages, struct page **pages);
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void free_xenballooned_pages(int nr_pages, struct page **pages);
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struct device;
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#ifdef CONFIG_XEN_SELFBALLOONING
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extern int register_xen_selfballooning(struct device *dev);
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#else
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static inline int register_xen_selfballooning(struct device *dev)
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{
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return -ENOSYS;
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}
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#endif
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#ifdef CONFIG_XEN_BALLOON
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void xen_balloon_init(void);
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#else
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static inline void xen_balloon_init(void)
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{
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}
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#endif
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#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
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struct resource;
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void arch_xen_balloon_init(struct resource *hostmem_resource);
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#endif
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