diff options
| -rw-r--r-- | arch/x86/xen/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/xen/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/xen/balloon.c | 5 |
3 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig index fdce49c7aff6..c31ee77e1ec1 100644 --- a/arch/x86/xen/Kconfig +++ b/arch/x86/xen/Kconfig @@ -6,6 +6,7 @@ config XEN bool "Xen guest support" select PARAVIRT select PARAVIRT_CLOCK + select XEN_HAVE_PVMMU depends on X86_64 || (X86_32 && X86_PAE && !X86_VISWS) depends on X86_CMPXCHG && X86_TSC help diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index 126d8ce591ce..cabfa97f4674 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -206,4 +206,7 @@ config XEN_MCE_LOG Allow kernel fetching MCE error from Xen platform and converting it into Linux mcelog format for mcelog tools +config XEN_HAVE_PVMMU + bool + endmenu diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index d6886d90ccfd..a56776dbe095 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -359,6 +359,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages) set_phys_to_machine(pfn, frame_list[i]); +#ifdef CONFIG_XEN_HAVE_PVMMU /* Link back into the page tables if not highmem. */ if (xen_pv_domain() && !PageHighMem(page)) { int ret; @@ -368,6 +369,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages) 0); BUG_ON(ret); } +#endif /* Relinquish the page back to the allocator. */ ClearPageReserved(page); @@ -416,13 +418,14 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp) scrub_page(page); +#ifdef CONFIG_XEN_HAVE_PVMMU if (xen_pv_domain() && !PageHighMem(page)) { ret = HYPERVISOR_update_va_mapping( (unsigned long)__va(pfn << PAGE_SHIFT), __pte_ma(0), 0); BUG_ON(ret); } - +#endif } /* Ensure that ballooned highmem pages don't have kmaps. */ |