diff options
| -rw-r--r-- | arch/x86/xen/setup.c | 20 | ||||
| -rw-r--r-- | drivers/xen/balloon.c | 44 | ||||
| -rw-r--r-- | include/xen/page.h | 10 |
3 files changed, 46 insertions, 28 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index c983717c018c..0c8e974c738a 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -37,7 +37,7 @@ extern void xen_syscall_target(void); extern void xen_syscall32_target(void); /* Amount of extra memory space we add to the e820 ranges */ -phys_addr_t xen_extra_mem_start, xen_extra_mem_size; +struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata; /* Number of pages released from the initial allocation. */ unsigned long xen_released_pages; @@ -59,7 +59,7 @@ static void __init xen_add_extra_mem(unsigned long pages) unsigned long pfn; u64 size = (u64)pages * PAGE_SIZE; - u64 extra_start = xen_extra_mem_start + xen_extra_mem_size; + u64 extra_start = xen_extra_mem[0].start + xen_extra_mem[0].size; if (!pages) return; @@ -69,7 +69,7 @@ static void __init xen_add_extra_mem(unsigned long pages) memblock_x86_reserve_range(extra_start, extra_start + size, "XEN EXTRA"); - xen_extra_mem_size += size; + xen_extra_mem[0].size += size; xen_max_p2m_pfn = PFN_DOWN(extra_start + size); @@ -242,7 +242,7 @@ char * __init xen_memory_setup(void) memcpy(map_raw, map, sizeof(map)); e820.nr_map = 0; - xen_extra_mem_start = mem_end; + xen_extra_mem[0].start = mem_end; for (i = 0; i < memmap.nr_entries; i++) { unsigned long long end; @@ -270,8 +270,8 @@ char * __init xen_memory_setup(void) e820_add_region(end, delta, E820_UNUSABLE); } - if (map[i].size > 0 && end > xen_extra_mem_start) - xen_extra_mem_start = end; + if (map[i].size > 0 && end > xen_extra_mem[0].start) + xen_extra_mem[0].start = end; /* Add region if any remains */ if (map[i].size > 0) @@ -279,10 +279,10 @@ char * __init xen_memory_setup(void) } /* Align the balloon area so that max_low_pfn does not get set * to be at the _end_ of the PCI gap at the far end (fee01000). - * Note that xen_extra_mem_start gets set in the loop above to be - * past the last E820 region. */ - if (xen_initial_domain() && (xen_extra_mem_start < (1ULL<<32))) - xen_extra_mem_start = (1ULL<<32); + * Note that the start of balloon area gets set in the loop above + * to be past the last E820 region. */ + if (xen_initial_domain() && (xen_extra_mem[0].start < (1ULL<<32))) + xen_extra_mem[0].start = (1ULL<<32); /* * In domU, the ISA region is normal, usable memory, but we diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 9efb993090aa..fc43b53651d7 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -555,11 +555,32 @@ void free_xenballooned_pages(int nr_pages, struct page** pages) } EXPORT_SYMBOL(free_xenballooned_pages); -static int __init balloon_init(void) +static void __init balloon_add_region(unsigned long start_pfn, + unsigned long pages) { unsigned long pfn, extra_pfn_end; struct page *page; + /* + * If the amount of usable memory has been limited (e.g., with + * the 'mem' command line parameter), don't add pages beyond + * this limit. + */ + extra_pfn_end = min(max_pfn, start_pfn + pages); + + for (pfn = start_pfn; pfn < extra_pfn_end; pfn++) { + page = pfn_to_page(pfn); + /* totalram_pages and totalhigh_pages do not + include the boot-time balloon extension, so + don't subtract from it. */ + __balloon_append(page); + } +} + +static int __init balloon_init(void) +{ + int i; + if (!xen_domain()) return -ENODEV; @@ -587,23 +608,12 @@ static int __init balloon_init(void) /* * Initialize the balloon with pages from the extra memory - * region (see arch/x86/xen/setup.c). - * - * If the amount of usable memory has been limited (e.g., with - * the 'mem' command line parameter), don't add pages beyond - * this limit. + * regions (see arch/x86/xen/setup.c). */ - extra_pfn_end = min(max_pfn, - (unsigned long)PFN_DOWN(xen_extra_mem_start - + xen_extra_mem_size)); - for (pfn = PFN_UP(xen_extra_mem_start); - pfn < extra_pfn_end; - pfn++) { - page = pfn_to_page(pfn); - /* totalram_pages and totalhigh_pages do not include the boot-time - balloon extension, so don't subtract from it. */ - __balloon_append(page); - } + for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) + if (xen_extra_mem[i].size) + balloon_add_region(PFN_UP(xen_extra_mem[i].start), + PFN_DOWN(xen_extra_mem[i].size)); return 0; } diff --git a/include/xen/page.h b/include/xen/page.h index 92b61f8c772c..12765b6f9517 100644 --- a/include/xen/page.h +++ b/include/xen/page.h @@ -3,7 +3,15 @@ #include <asm/xen/page.h> -extern phys_addr_t xen_extra_mem_start, xen_extra_mem_size; +struct xen_memory_region { + phys_addr_t start; + phys_addr_t size; +}; + +#define XEN_EXTRA_MEM_MAX_REGIONS 128 /* == E820MAX */ + +extern __initdata +struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS]; extern unsigned long xen_released_pages; |