search for: clear_pte

...} EXPORT_SYMBOL_GPL(gnttab_map_refs); @@ -785,12 +789,16 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops, if (xen_feature(XENFEAT_auto_translated_physmap)) return ret; + arch_enter_lazy_mmu_mode(); + for (i = 0; i < count; i++) { ret = m2p_remove_override(pages[i], clear_pte); if (ret) return ret; } + arch_leave_lazy_mmu_mode(); + return ret; } EXPORT_SYMBOL_GPL(gnttab_unmap_refs); -- 1.7.2.5

Add a pte_update_hook which notifies about pte changes that have been made without using the set_pte / clear_pte interfaces. This allows shadow mode hypervisors which do not trap on page table access to maintain synchronized shadows. It also turns out, there was one pte update in PAE mode that wasn't using any accessor interface at all for setting NX protection. Considering it is PAE specific, and the...

...t;update); hmm_range_unregister(&range); return VM_FAULT_NOPAGE; } drop_lock(kvmms->update); goto again; } The notifier callback: kvmms_notifier_start() { take_lock(kvmms->update); clear_pte(start, end); drop_lock(kvmms->update); } > > Our model (the importing process is encapsulated in another VM) forces us > to mirror certain pages from the anon VMA backing one VM's system RAM to > the other VM's anon VMA. The mirror does not have to be...

...mp;range); > return VM_FAULT_NOPAGE; > } > drop_lock(kvmms->update); > goto again; > } > > The notifier callback: > kvmms_notifier_start() { > take_lock(kvmms->update); > clear_pte(start, end); > drop_lock(kvmms->update); > } > >> >> Our model (the importing process is encapsulated in another VM) forces us >> to mirror certain pages from the anon VMA backing one VM's system RAM to >> the other VM's anon VMA. &...

...mp;range); > return VM_FAULT_NOPAGE; > } > drop_lock(kvmms->update); > goto again; > } > > The notifier callback: > kvmms_notifier_start() { > take_lock(kvmms->update); > clear_pte(start, end); > drop_lock(kvmms->update); > } > >> >> Our model (the importing process is encapsulated in another VM) forces us >> to mirror certain pages from the anon VMA backing one VM's system RAM to >> the other VM's anon VMA. &...

...age, - struct gnttab_map_grant_ref *kmap_op) -{ - return 0; -} +extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, + struct gnttab_map_grant_ref *kmap_ops, + struct page **pages, unsigned int count); -static inline int m2p_remove_override(struct page *page, bool clear_pte) -{ - return 0; -} +extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, + struct gnttab_map_grant_ref *kmap_ops, + struct page **pages, unsigned int count); bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); bool __set_phys_to_machine_mu...

...age, - struct gnttab_map_grant_ref *kmap_op) -{ - return 0; -} +extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, + struct gnttab_map_grant_ref *kmap_ops, + struct page **pages, unsigned int count); -static inline int m2p_remove_override(struct page *page, bool clear_pte) -{ - return 0; -} +extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, + struct gnttab_map_grant_ref *kmap_ops, + struct page **pages, unsigned int count); bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); bool __set_phys_to_machine_mu...

...t pud) +static inline void set_pud_at(struct mm_struct *mm, unsigned long addr, + pud_t *pudp, pud_t pud) { native_set_pud(pudp, pud); } -#ifndef CONFIG_PARAVIRT -/* - * Rules for using pte_update - it must be called after any PTE update which - * has not been done using the set_pte / clear_pte interfaces. It is used by - * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE - * updates should either be sets, clears, or set_pte_atomic for P->P - * transitions, which means this hook should only be called for user PTEs. - * This hook implies a P->P protection...

...t pud) +static inline void set_pud_at(struct mm_struct *mm, unsigned long addr, + pud_t *pudp, pud_t pud) { native_set_pud(pudp, pud); } -#ifndef CONFIG_PARAVIRT -/* - * Rules for using pte_update - it must be called after any PTE update which - * has not been done using the set_pte / clear_pte interfaces. It is used by - * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE - * updates should either be sets, clears, or set_pte_atomic for P->P - * transitions, which means this hook should only be called for user PTEs. - * This hook implies a P->P protection...

From: Mircea C?rjaliu <mcirjaliu at bitdefender.com> The following two new mm exports are introduced: * mm_remote_map(struct mm_struct *req_mm, unsigned long req_hva, unsigned long map_hva) * mm_remote_unmap(unsigned long map_hva) * mm_remote_reset(void) * rmap_walk_remote(struct page *page, struct rmap_walk_control *rwc) This patch

This series implements ballooning for Xen on ARM and builds and Mukesh''s PVH privcmd stuff to implement foreign page mapping on ARM, replacing the old "HACK: initial (very hacky) XENMAPSPACE_gmfn_foreign" patch. The baseline is a bit complex, it is basically Stefano''s xenarm-forlinus branch (commit bbd6eb29214e) merged with Konrad''s linux-next-pvh branch

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

The following patches introduce the core infrastructure needed to paravirtualize the 32-bit x86 Linux kernel. This is done by moving virtualization sensitive insn's or code paths to a function table, paravirt_ops. This structure can be populated with hypervisor specific calls or native stubs and currently support running on bare metal, VMI, Xen, or Lhype. These patches apply to

Hi all, this patch series enables xen-swiotlb on arm and arm64. It has been heavily reworked compared to the previous versions in order to achieve better performances and to address review comments. We are not using dma_mark_clean to ensure coherency anymore. We call the platform implementation of map_page and unmap_page. We assume that dom0 has been mapped 1:1 (physical address == machine