29 May
2018
29 May
'18
6:24 p.m.
On 05/25/2018 11:33 AM, Oleksandr Andrushchenko wrote:
+void xenmem_reservation_va_mapping_update(unsigned long count,
struct page **pages,xen_pfn_t *frames)+{ +#ifdef CONFIG_XEN_HAVE_PVMMU
- int i;
- for (i = 0; i < count; i++) {
struct page *page;page = pages[i];BUG_ON(page == NULL);/** We don't support PV MMU when Linux and Xen is using* different page granularity.*/BUILD_BUG_ON(XEN_PAGE_SIZE != PAGE_SIZE);if (!xen_feature(XENFEAT_auto_translated_physmap)) {unsigned long pfn = page_to_pfn(page);set_phys_to_machine(pfn, frames[i]);/* Link back into the page tables if not highmem. */if (!PageHighMem(page)) {int ret;ret = HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),mfn_pte(frames[i], PAGE_KERNEL),0);BUG_ON(ret);}}- }
+#endif +} +EXPORT_SYMBOL(xenmem_reservation_va_mapping_update);
+void xenmem_reservation_va_mapping_reset(unsigned long count,
struct page **pages)+{ +#ifdef CONFIG_XEN_HAVE_PVMMU
- int i;
- for (i = 0; i < count; i++) {
/** We don't support PV MMU when Linux and Xen is using* different page granularity.*/BUILD_BUG_ON(XEN_PAGE_SIZE != PAGE_SIZE);if (!xen_feature(XENFEAT_auto_translated_physmap)) {struct page *page = pages[i];unsigned long pfn = page_to_pfn(page);if (!PageHighMem(page)) {int ret;ret = HYPERVISOR_update_va_mapping((unsigned long)__va(pfn << PAGE_SHIFT),__pte_ma(0), 0);BUG_ON(ret);}__set_phys_to_machine(pfn, INVALID_P2M_ENTRY);}- }
+#endif +} +EXPORT_SYMBOL(xenmem_reservation_va_mapping_reset);
One other thing I noticed --- both of these can be declared as NOPs in the header file if !CONFIG_XEN_HAVE_PVMMU.
-boris