search for: arbitrary_virt_to_machine

...-#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_machine(__va) \ -({ \ - maddr_t m = (maddr_t)pte_mfn(*virt_to_ptep(__va)) << PAGE_SHIFT;\ - m | ((unsigned long)(__va) & (PAGE_SIZE-1)); \ -}) +#define virt_to_ptep(va) \ +({ \ + pte_t *__ptep = lookup_address((unsigned long)(va)); \ + BUG_ON(!__ptep || !pte_present(*_...

...sending out the patches shortly after testing with my (still in progress!) Linux LDT test suite. First interface quirk came up. It looks like Xen wants to return errors from hypercalls: +static inline int install_ldt_entry (__u32 *lp, __u32 entry_1, __u32 entry_2) +{ + unsigned long mach_lp = arbitrary_virt_to_machine(lp); + + return HYPERVISOR_update_descriptor(mach_lp, entry_1, entry_2); +} While this is fine here, this could be problematic in terms of forcing error checking in lots of situations where there used to be no error checking in regular Linux - i.e. GDT updates which fail really are fatal to the...

...sending out the patches shortly after testing with my (still in progress!) Linux LDT test suite. First interface quirk came up. It looks like Xen wants to return errors from hypercalls: +static inline int install_ldt_entry (__u32 *lp, __u32 entry_1, __u32 entry_2) +{ + unsigned long mach_lp = arbitrary_virt_to_machine(lp); + + return HYPERVISOR_update_descriptor(mach_lp, entry_1, entry_2); +} While this is fine here, this could be problematic in terms of forcing error checking in lots of situations where there used to be no error checking in regular Linux - i.e. GDT updates which fail really are fatal to the...

...uct xenbus_device *dev, if (!node) return -ENOMEM; - area = alloc_vm_area(PAGE_SIZE, &pte); + area = alloc_vm_area(PAGE_SIZE * nr_grefs, pte); if (!area) { kfree(node); return -ENOMEM; } - op.host_addr = arbitrary_virt_to_machine(pte).maddr; + for (i = 0; i < nr_grefs; i++) { + op[i].flags = GNTMAP_host_map | GNTMAP_contains_pte, + op[i].ref = gnt_ref[i], + op[i].dom = dev->otherend_id, + op[i].host_addr = arbitrary_virt_to_machine(pte[i]).maddr; +...

...uct xenbus_device *dev, if (!node) return -ENOMEM; - area = alloc_vm_area(PAGE_SIZE, &pte); + area = alloc_vm_area(PAGE_SIZE * nr_grefs, pte); if (!area) { kfree(node); return -ENOMEM; } - op.host_addr = arbitrary_virt_to_machine(pte).maddr; + for (i = 0; i < nr_grefs; i++) { + op[i].flags = GNTMAP_host_map | GNTMAP_contains_pte, + op[i].ref = gnt_ref[i], + op[i].dom = dev->otherend_id, + op[i].host_addr = arbitrary_virt_to_machine(pte[i]).maddr; +...

...uct xenbus_device *dev, if (!node) return -ENOMEM; - area = alloc_vm_area(PAGE_SIZE, &pte); + area = alloc_vm_area(PAGE_SIZE * nr_grefs, pte); if (!area) { kfree(node); return -ENOMEM; } - op.host_addr = arbitrary_virt_to_machine(pte).maddr; + for (i = 0; i < nr_grefs; i++) { + op[i].flags = GNTMAP_host_map | GNTMAP_contains_pte, + op[i].ref = gnt_ref[i], + op[i].dom = dev->otherend_id, + op[i].host_addr = arbitrary_virt_to_machine(pte[i]).maddr; +...

...pinned(struct mm_struct *mm) +{ + if (!mm->context.pinned) { + spin_lock(&mm_unpinned_lock); + list_del(&mm->context.unpinned); + spin_unlock(&mm_unpinned_lock); + } +} + +static inline int install_ldt_entry (__u32 *lp, __u32 entry_1, __u32 entry_2) +{ + unsigned long mach_lp = arbitrary_virt_to_machine(lp); + + return HYPERVISOR_update_descriptor(mach_lp, entry_1, entry_2); +} + +#endif /* __ASM_HYPERVISOR_HOOKS_H */

...pinned(struct mm_struct *mm) +{ + if (!mm->context.pinned) { + spin_lock(&mm_unpinned_lock); + list_del(&mm->context.unpinned); + spin_unlock(&mm_unpinned_lock); + } +} + +static inline int install_ldt_entry (__u32 *lp, __u32 entry_1, __u32 entry_2) +{ + unsigned long mach_lp = arbitrary_virt_to_machine(lp); + + return HYPERVISOR_update_descriptor(mach_lp, entry_1, entry_2); +} + +#endif /* __ASM_HYPERVISOR_HOOKS_H */

...00000 -0700 +++ linux-2.6.13/include/asm-i386/mach-xen/mach_desc.h 2005-08-08 21:19:43.000000000 -0700 @@ -0,0 +1,11 @@ +#ifndef __MACH_DESC_H +#define __MACH_DESC_H + +static inline void write_ldt_entry (struct desc_struct *ldt, int entry, __u32 entry_1, __u32 entry_2) +{ + unsigned long mach_lp = arbitrary_virt_to_machine(&ldt[entry]); + + return HYPERVISOR_update_descriptor(mach_lp, entry_1, entry_2); +} + +#endif

...00000 -0700 +++ linux-2.6.13/include/asm-i386/mach-xen/mach_desc.h 2005-08-08 21:19:43.000000000 -0700 @@ -0,0 +1,11 @@ +#ifndef __MACH_DESC_H +#define __MACH_DESC_H + +static inline void write_ldt_entry (struct desc_struct *ldt, int entry, __u32 entry_1, __u32 entry_2) +{ + unsigned long mach_lp = arbitrary_virt_to_machine(&ldt[entry]); + + return HYPERVISOR_update_descriptor(mach_lp, entry_1, entry_2); +} + +#endif

2011/7/19 Stefano Stabellini <stefano.stabellini@eu.citrix.com>: > CC''ing Tim and xen-devel > > On Mon, 18 Jul 2011, Jiageng Yu wrote: >> 2011/7/16 Stefano Stabellini <stefano.stabellini@eu.citrix.com>: >> > On Fri, 15 Jul 2011, Jiageng Yu wrote: >> >> 2011/7/15 Jiageng Yu <yujiageng734@gmail.com>: >> >> > 2011/7/15

Hi Jeremy. According to your suggestion, I recreated patches for Ingo's x86.git tree. And this patch series includes Eddie's modification. Please review and forward them. (or push back to respin.) Recently the xen-ia64 community started to make efforts to merge xen/ia64 Linux to upstream. The first step is to merge up domU portion. This patchset is preliminary for xen/ia64 domU linux

Hi Jeremy. According to your suggestion, I recreated patches for Ingo's x86.git tree. And this patch series includes Eddie's modification. Please review and forward them. (or push back to respin.) Recently the xen-ia64 community started to make efforts to merge xen/ia64 Linux to upstream. The first step is to merge up domU portion. This patchset is preliminary for xen/ia64 domU linux

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-rc7 + your patches + the last batch of pv_ops patches I posted. This patch generally restricts itself to Xen-specific parts of the tree, though it does make a few small changes elsewhere. These patches include: - some helper routines for allocating address space and walking pagetables - Xen

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-rc7 + your patches + the last batch of pv_ops patches I posted. This patch generally restricts itself to Xen-specific parts of the tree, though it does make a few small changes elsewhere. These patches include: - some helper routines for allocating address space and walking pagetables - Xen

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-git13 + patches-2.6.21-git7-070507-1.tar.gz (I think "unwinder" is the only patch which doesn't apply to git13, and the sched-clock patches are the only ones which this series actually needs). Changes since the last posting: - More netfront review and cleanup - Added ability to

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-git13 + patches-2.6.21-git7-070507-1.tar.gz (I think "unwinder" is the only patch which doesn't apply to git13, and the sched-clock patches are the only ones which this series actually needs). Changes since the last posting: - More netfront review and cleanup - Added ability to

Hi Andi, This series of patches implements the Xen paravirt-ops interface. It applies to 2.6.21-git13 + patches-2.6.21-git7-070507-1.tar.gz (I think "unwinder" is the only patch which doesn't apply to git13, and the sched-clock patches are the only ones which this series actually needs). Changes since the last posting: - More netfront review and cleanup - Added ability to

Hi, This is the Xen implementation for the paravirt_ops interface. The series is based on 2.6.22-rc1-mm1, and I think its ready to be cooked in -mm with a view to being merged in 2.6.23. The first part of the series is some small changes to the core kernel. Apart from the new code added in "Allocate and free vmalloc areas" (posted many times before), they are simply a few one-liners

Hi, This is the Xen implementation for the paravirt_ops interface. The series is based on 2.6.22-rc1-mm1, and I think its ready to be cooked in -mm with a view to being merged in 2.6.23. The first part of the series is some small changes to the core kernel. Apart from the new code added in "Allocate and free vmalloc areas" (posted many times before), they are simply a few one-liners