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| author | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2011-10-15 00:14:01 +0000 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2011-10-15 00:14:01 +0000 |
| commit | 07aaae44f5a3962c3a410a6dd7936dfa7dece2b9 (patch) | |
| tree | 0cdb5735800ddd63d8850aa26d3a3f1f3334267a /arch/x86/xen/setup.c | |
| parent | 07a062140372187642003e02a49edc8a2115c1ca (diff) | |
| parent | 976d167615b64e14bc1491ca51d424e2ba9a5e84 (diff) | |
Merge commit 'v3.1-rc9' into fbdev-next
Diffstat (limited to 'arch/x86/xen/setup.c')
| -rw-r--r-- | arch/x86/xen/setup.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index df118a825f3..46d6d21dbdb 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -184,6 +184,19 @@ static unsigned long __init xen_set_identity(const struct e820entry *list, PFN_UP(start_pci), PFN_DOWN(last)); return identity; } + +static unsigned long __init xen_get_max_pages(void) +{ + unsigned long max_pages = MAX_DOMAIN_PAGES; + domid_t domid = DOMID_SELF; + int ret; + + ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid); + if (ret > 0) + max_pages = ret; + return min(max_pages, MAX_DOMAIN_PAGES); +} + /** * machine_specific_memory_setup - Hook for machine specific memory setup. **/ @@ -292,6 +305,14 @@ char * __init xen_memory_setup(void) sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); + extra_limit = xen_get_max_pages(); + if (max_pfn + extra_pages > extra_limit) { + if (extra_limit > max_pfn) + extra_pages = extra_limit - max_pfn; + else + extra_pages = 0; + } + extra_pages += xen_return_unused_memory(xen_start_info->nr_pages, &e820); /* |