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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 14:01:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-03 14:01:37 -0700 |
| commit | a372c967a38a789caf52d4b1d2a78781e1b25d91 (patch) | |
| tree | 6b7947c97d43b91ee119e41f2b6e2ae0e6082cad /arch/arm | |
| parent | 32d01dc7be4e725ab85ce1d74e8f4adc02ad68dd (diff) | |
| parent | cd979883b9ede90643e019f33cb317933eb867b4 (diff) | |
Merge tag 'stable/for-linus-3.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen features and fixes from David Vrabel:
"Support PCI devices with multiple MSIs, performance improvement for
kernel-based backends (by not populated m2p overrides when mapping),
and assorted minor bug fixes and cleanups"
* tag 'stable/for-linus-3.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/acpi-processor: fix enabling interrupts on syscore_resume
xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_override
xen: remove XEN_PRIVILEGED_GUEST
xen: add support for MSI message groups
xen-pciback: Use pci_enable_msix_exact() instead of pci_enable_msix()
xen/xenbus: remove unused xenbus_bind_evtchn()
xen/events: remove unnecessary call to bind_evtchn_to_cpu()
xen/events: remove the unused resend_irq_on_evtchn()
drivers:xen-selfballoon:reset 'frontswap_inertia_counter' after frontswap_shrink
drivers: xen: Include appropriate header file in pcpu.c
drivers: xen: Mark function as static in platform-pci.c
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/xen/page.h | 15 | ||||
| -rw-r--r-- | arch/arm/xen/p2m.c | 32 |
2 files changed, 38 insertions, 9 deletions
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h index e0965abacb7d..cf4f3e867395 100644 --- a/arch/arm/include/asm/xen/page.h +++ b/arch/arm/include/asm/xen/page.h @@ -97,16 +97,13 @@ static inline pte_t *lookup_address(unsigned long address, unsigned int *level) return NULL; } -static inline int m2p_add_override(unsigned long mfn, struct page *page, - 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_multi(unsigned long pfn, unsigned long mfn, diff --git a/arch/arm/xen/p2m.c b/arch/arm/xen/p2m.c index b31ee1b275b0..97baf4427817 100644 --- a/arch/arm/xen/p2m.c +++ b/arch/arm/xen/p2m.c @@ -146,6 +146,38 @@ unsigned long __mfn_to_pfn(unsigned long mfn) } EXPORT_SYMBOL_GPL(__mfn_to_pfn); +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) +{ + int i; + + for (i = 0; i < count; i++) { + if (map_ops[i].status) + continue; + set_phys_to_machine(map_ops[i].host_addr >> PAGE_SHIFT, + map_ops[i].dev_bus_addr >> PAGE_SHIFT); + } + + return 0; +} +EXPORT_SYMBOL_GPL(set_foreign_p2m_mapping); + +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) +{ + int i; + + for (i = 0; i < count; i++) { + set_phys_to_machine(unmap_ops[i].host_addr >> PAGE_SHIFT, + INVALID_P2M_ENTRY); + } + + return 0; +} +EXPORT_SYMBOL_GPL(clear_foreign_p2m_mapping); + bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, unsigned long nr_pages) { |