search for: virt_to_ptep

...clude/asm-i386/mach-xen/asm/pgtable.h 2008-05-15 13:38:59.000000000 +0200 @@ -477,19 +477,16 @@ void make_page_writable(void *va, unsign void make_pages_readonly(void *va, unsigned int nr, unsigned int feature); void make_pages_writable(void *va, unsigned int nr, unsigned int feature); -#define virt_to_ptep(__va) \ -({ \ - pgd_t *__pgd = pgd_offset_k((unsigned long)(__va)); \ - pud_t *__pud = pud_offset(__pgd, (unsigned long)(__va)); \ - pmd_t *__pmd = pmd_offset(__pud, (unsigned long)(__va)); \ - pte_offset_kernel(__pmd, (unsigned long)(__va)); \ -}) - -#define arbitrary_virt_to_machin...

...FP_ZERO, 0); +#endif if (pte) { SetPageForeign(pte, pte_free); set_page_count(pte, 1); } -#endif return pte; } void pte_free(struct page *pte) { - unsigned long va = (unsigned long)__va(page_to_pfn(pte)<<PAGE_SHIFT); + unsigned long pfn = page_to_pfn(pte); - if (!pte_write(*virt_to_ptep(va))) - BUG_ON(HYPERVISOR_update_va_mapping( - va, pfn_pte(page_to_pfn(pte), PAGE_KERNEL), 0)); + if (!PageHighMem(pte)) { + unsigned long va = (unsigned long)__va(pfn << PAGE_SHIFT); + + if (!pte_write(*virt_to_ptep(va))) + BUG_ON(HYPERVISOR_update_va_mapping( + va, pfn_pte(p...

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths