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* xen/gnttab: Use phys_addr_t to describe the grant frame base addressJulien Grall2014-01-30
| | | | | | | | | | | | | On ARM, address size can be 32 bits or 64 bits (if CONFIG_ARCH_PHYS_ADDR_T_64BIT is enabled). We can't assume that the grant frame base address will always fits in an unsigned long. Use phys_addr_t instead of unsigned long as argument for gnttab_setup_auto_xlat_frames. Signed-off-by: Julien Grall <julien.grall@linaro.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com>
* arm/xen: Initialize event channels earlierJulien Grall2014-01-30
| | | | | | | | | | | | | | Event channels driver needs to be initialized very early. Until now, Xen initialization was done after all CPUs was bring up. We can safely move the initialization to an early initcall. Also use a cpu notifier to: - Register the VCPU when the CPU is prepared - Enable event channel IRQ when the CPU is running Signed-off-by: Julien Grall <julien.grall@linaro.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/grant: Implement an grant frame array struct (v3).Konrad Rzeszutek Wilk2014-01-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'xen_hvm_resume_frames' used to be an 'unsigned long' and contain the virtual address of the grants. That was OK for most architectures (PVHVM, ARM) were the grants are contiguous in memory. That however is not the case for PVH - in which case we will have to do a lookup for each virtual address for the PFN. Instead of doing that, lets make it a structure which will contain the array of PFNs, the virtual address and the count of said PFNs. Also provide a generic functions: gnttab_setup_auto_xlat_frames and gnttab_free_auto_xlat_frames to populate said structure with appropriate values for PVHVM and ARM. To round it off, change the name from 'xen_hvm_resume_frames' to a more descriptive one - 'xen_auto_xlat_grant_frames'. For PVH, in patch "xen/pvh: Piggyback on PVHVM for grant driver" we will populate the 'xen_auto_xlat_grant_frames' by ourselves. v2 moves the xen_remap in the gnttab_setup_auto_xlat_frames and also introduces xen_unmap for gnttab_free_auto_xlat_frames. Suggested-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [v3: Based on top of 'asm/xen/page.h: remove redundant semicolon'] Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* arm: xen: foreign mapping PTEs are special.Ian Campbell2013-12-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | These mappings are in fact special and require special handling in privcmd, which already exists. Failure to mark the PTE as special on arm64 causes all sorts of bad PTE fun. e.g. e.g.: BUG: Bad page map in process xl pte:e0004077b33f53 pmd:4079575003 page:ffffffbce1a2f328 count:1 mapcount:-1 mapping: (null) index:0x0 page flags: 0x4000000000000014(referenced|dirty) addr:0000007fb5259000 vm_flags:040644fa anon_vma: (null) mapping:ffffffc03a6fda58 index:0 vma->vm_ops->fault: privcmd_fault+0x0/0x38 vma->vm_file->f_op->mmap: privcmd_mmap+0x0/0x2c CPU: 0 PID: 2657 Comm: xl Not tainted 3.12.0+ #102 Call trace: [<ffffffc0000880f8>] dump_backtrace+0x0/0x12c [<ffffffc000088238>] show_stack+0x14/0x1c [<ffffffc0004b67e0>] dump_stack+0x70/0x90 [<ffffffc000125690>] print_bad_pte+0x12c/0x1bc [<ffffffc0001268f4>] unmap_single_vma+0x4cc/0x700 [<ffffffc0001273b4>] unmap_vmas+0x68/0xb4 [<ffffffc00012c050>] unmap_region+0xcc/0x1d4 [<ffffffc00012df20>] do_munmap+0x218/0x314 [<ffffffc00012e060>] vm_munmap+0x44/0x64 [<ffffffc00012ed78>] SyS_munmap+0x24/0x34 Where unmap_single_vma contains inlined -> unmap_page_range -> zap_pud_range -> zap_pmd_range -> zap_pte_range -> print_bad_pte. Or: BUG: Bad page state in process xl pfn:4077b4d page:ffffffbce1a2f8d8 count:0 mapcount:-1 mapping: (null) index:0x0 page flags: 0x4000000000000014(referenced|dirty) Modules linked in: CPU: 0 PID: 2657 Comm: xl Tainted: G B 3.12.0+ #102 Call trace: [<ffffffc0000880f8>] dump_backtrace+0x0/0x12c [<ffffffc000088238>] show_stack+0x14/0x1c [<ffffffc0004b67e0>] dump_stack+0x70/0x90 [<ffffffc00010f798>] bad_page+0xc4/0x110 [<ffffffc00010f8b4>] free_pages_prepare+0xd0/0xd8 [<ffffffc000110e94>] free_hot_cold_page+0x28/0x178 [<ffffffc000111460>] free_hot_cold_page_list+0x38/0x60 [<ffffffc000114cf0>] release_pages+0x190/0x1dc [<ffffffc00012c0e0>] unmap_region+0x15c/0x1d4 [<ffffffc00012df20>] do_munmap+0x218/0x314 [<ffffffc00012e060>] vm_munmap+0x44/0x64 [<ffffffc00012ed78>] SyS_munmap+0x24/0x34 x86 already gets this correct. 32-bit arm gets away with this because there is not PTE_SPECIAL bit in the PTE there and the vm_normal_page fallback path does the right thing. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* XEN: Grant table address, xen_hvm_resume_frames, is a phys_addr not a pfnEric Trudeau2013-12-04
| | | | | | | | | | | | | | | From: Eric Trudeau <etrudeau@broadcom.com> xen_hvm_resume_frames stores the physical address of the grant table. englighten.c was incorrectly setting it as if it was a page frame number. This caused the table to be mapped into the guest at an unexpected physical address. Additionally, a warning is improved to include the grant table address which failed in xen_remap. Signed-off-by: Eric Trudeau <etrudeau@broadcom.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: p2m_init and p2m_lock should be staticStefano Stabellini2013-11-18
| | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* arm/xen: Export phys_to_mach to fix Xen module link errorsJosh Boyer2013-11-18
| | | | | | | | | | | | | | | | | Various xen drivers fail to link when built as modules with the following error: ERROR: "phys_to_mach" [drivers/xen/xen-gntalloc.ko] undefined! ERROR: "phys_to_mach" [drivers/net/xen-netfront.ko] undefined! ERROR: "phys_to_mach" [drivers/net/xen-netback/xen-netback.ko] undefined! ERROR: "phys_to_mach" [drivers/block/xen-blkfront.ko] undefined! The mfn_to_pfn and pfn_to_mfn functions get inlined in these modules and those functions require phys_to_mach. Export the symbol to fix the link errors. Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* Merge remote-tracking branch 'stefano/swiotlb-xen-9.1' into ↵Konrad Rzeszutek Wilk2013-11-08
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | stable/for-linus-3.13 * stefano/swiotlb-xen-9.1: swiotlb-xen: fix error code returned by xen_swiotlb_map_sg_attrs swiotlb-xen: static inline xen_phys_to_bus, xen_bus_to_phys, xen_virt_to_bus and range_straddles_page_boundary grant-table: call set_phys_to_machine after mapping grant refs arm,arm64: do not always merge biovec if we are running on Xen swiotlb: print a warning when the swiotlb is full swiotlb-xen: use xen_dma_map/unmap_page, xen_dma_sync_single_for_cpu/device xen: introduce xen_dma_map/unmap_page and xen_dma_sync_single_for_cpu/device swiotlb-xen: use xen_alloc/free_coherent_pages xen: introduce xen_alloc/free_coherent_pages arm64/xen: get_dma_ops: return xen_dma_ops if we are running as xen_initial_domain arm/xen: get_dma_ops: return xen_dma_ops if we are running as xen_initial_domain swiotlb-xen: introduce xen_swiotlb_set_dma_mask xen/arm,arm64: enable SWIOTLB_XEN xen: make xen_create_contiguous_region return the dma address xen/x86: allow __set_phys_to_machine for autotranslate guests arm/xen,arm64/xen: introduce p2m arm64: define DMA_ERROR_CODE arm: make SWIOTLB available Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Conflicts: arch/arm/include/asm/dma-mapping.h drivers/xen/swiotlb-xen.c [Conflicts arose b/c "arm: make SWIOTLB available" v8 was in Stefano's branch, while I had v9 + Ack from Russel. I also fixed up white-space issues]
| * swiotlb-xen: use xen_alloc/free_coherent_pagesStefano Stabellini2013-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use xen_alloc_coherent_pages and xen_free_coherent_pages to allocate or free coherent pages. We need to be careful handling the pointer returned by xen_alloc_coherent_pages, because on ARM the pointer is not equal to phys_to_virt(*dma_handle). In fact virt_to_phys only works for kernel direct mapped RAM memory. In ARM case the pointer could be an ioremap address, therefore passing it to virt_to_phys would give you another physical address that doesn't correspond to it. Make xen_create_contiguous_region take a phys_addr_t as start parameter to avoid the virt_to_phys calls which would be incorrect. Changes in v6: - remove extra spaces. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * swiotlb-xen: introduce xen_swiotlb_set_dma_maskStefano Stabellini2013-10-09
| | | | | | | | | | | | Implement xen_swiotlb_set_dma_mask, use it for set_dma_mask on arm. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
| * xen/arm,arm64: enable SWIOTLB_XENStefano Stabellini2013-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Xen on arm and arm64 needs SWIOTLB_XEN: when running on Xen we need to program the hardware with mfns rather than pfns for dma addresses. Remove SWIOTLB_XEN dependency on X86 and PCI and make XEN select SWIOTLB_XEN on arm and arm64. At the moment always rely on swiotlb-xen, but when Xen starts supporting hardware IOMMUs we'll be able to avoid it conditionally on the presence of an IOMMU on the platform. Implement xen_create_contiguous_region on arm and arm64: for the moment we assume that dom0 has been mapped 1:1 (physical addresses == machine addresses) therefore we don't need to call XENMEM_exchange. Simply return the physical address as dma address. Initialize the xen-swiotlb from xen_early_init (before the native dma_ops are initialized), set xen_dma_ops to &xen_swiotlb_dma_ops. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v8: - assume dom0 is mapped 1:1, no need to call XENMEM_exchange. Changes in v7: - call __set_phys_to_machine_multi from xen_create_contiguous_region and xen_destroy_contiguous_region to update the P2M; - don't call XENMEM_unpin, it has been removed; - call XENMEM_exchange instead of XENMEM_exchange_and_pin; - set nr_exchanged to 0 before calling the hypercall. Changes in v6: - introduce and export xen_dma_ops; - call xen_mm_init from as arch_initcall. Changes in v4: - remove redefinition of DMA_ERROR_CODE; - update the code to use XENMEM_exchange_and_pin and XENMEM_unpin; - add a note about hardware IOMMU in the commit message. Changes in v3: - code style changes; - warn on XENMEM_put_dma_buf failures.
| * arm/xen,arm64/xen: introduce p2mStefano Stabellini2013-10-17
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce physical to machine and machine to physical tracking mechanisms based on rbtrees for arm/xen and arm64/xen. We need it because any guests on ARM are an autotranslate guests, therefore a physical address is potentially different from a machine address. When programming a device to do DMA, we need to be extra-careful to use machine addresses rather than physical addresses to program the device. Therefore we need to know the physical to machine mappings. For the moment we assume that dom0 starts with a 1:1 physical to machine mapping, in other words physical addresses correspond to machine addresses. However when mapping a foreign grant reference, obviously the 1:1 model doesn't work anymore. So at the very least we need to be able to track grant mappings. We need locking to protect accesses to the two trees. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v8: - move pfn_to_mfn and mfn_to_pfn to page.h as static inline functions; - no need to walk the tree if phys_to_mach.rb_node is NULL; - correctly handle multipage p2m entries; - substitute the spin_lock with a rwlock.
* Merge tag 'v3.11-rc7' into stable/for-linus-3.12Konrad Rzeszutek Wilk2013-09-09
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux 3.11-rc7 As we need the git commit 28817e9de4f039a1a8c1fe1df2fa2df524626b9e Author: Chuck Anderson <chuck.anderson@oracle.com> Date: Tue Aug 6 15:12:19 2013 -0700 xen/smp: initialize IPI vectors before marking CPU online * tag 'v3.11-rc7': (443 commits) Linux 3.11-rc7 ARC: [lib] strchr breakage in Big-endian configuration VFS: collect_mounts() should return an ERR_PTR bfs: iget_locked() doesn't return an ERR_PTR efs: iget_locked() doesn't return an ERR_PTR() proc: kill the extra proc_readfd_common()->dir_emit_dots() cope with potentially long ->d_dname() output for shmem/hugetlb usb: phy: fix build breakage USB: OHCI: add missing PCI PM callbacks to ohci-pci.c staging: comedi: bug-fix NULL pointer dereference on failed attach lib/lz4: correct the LZ4 license memcg: get rid of swapaccount leftovers nilfs2: fix issue with counting number of bio requests for BIO_EOPNOTSUPP error detection nilfs2: remove double bio_put() in nilfs_end_bio_write() for BIO_EOPNOTSUPP error drivers/platform/olpc/olpc-ec.c: initialise earlier ipv4: expose IPV4_DEVCONF ipv6: handle Redirect ICMP Message with no Redirected Header option be2net: fix disabling TX in be_close() Revert "ACPI / video: Always call acpi_video_init_brightness() on init" Revert "genetlink: fix family dump race" ... Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * Merge tag 'stable/for-linus-3.11-rc6-tag' of ↵Linus Torvalds2013-08-21
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull Xen bug-fixes from Konrad Rzeszutek Wilk: - On ARM did not have balanced calls to get/put_cpu. - Fix to make tboot + Xen + Linux correctly. - Fix events VCPU binding issues. - Fix a vCPU online race where IPIs are sent to not-yet-online vCPU. * tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/smp: initialize IPI vectors before marking CPU online xen/events: mask events when changing their VCPU binding xen/events: initialize local per-cpu mask for all possible events x86/xen: do not identity map UNUSABLE regions in the machine E820 xen/arm: missing put_cpu in xen_percpu_init
| | * xen/arm: missing put_cpu in xen_percpu_initJulien Grall2013-08-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_PREEMPT is enabled, Linux will not be able to boot and warn: [ 4.127825] ------------[ cut here ]------------ [ 4.133376] WARNING: at init/main.c:699 do_one_initcall+0x150/0x158() [ 4.140738] initcall xen_init_events+0x0/0x10c returned with preemption imbalance This is because xen_percpu_init uses get_cpu but doesn't have the corresponding put_cpu. Signed-off-by: Julien Grall <julien.grall@linaro.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* | | xen/arm: disable cpuidle and cpufreq when linux is running as dom0Julien Grall2013-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When linux is running as dom0, Xen doesn't show the physical cpu but a virtual CPU. On some ARM SOC (for instance the exynos 5250), linux registers callbacks for cpuidle and cpufreq. When these callbacks are called, they will modify directly the physical cpu not the virtual one. It can impact the whole board instead of only dom0. Signed-off-by: Julien Grall <julien.grall@linaro.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | | ARM: xen: only set pm function ptrs for Xen guestsRob Herring2013-09-09
|/ / | | | | | | | | | | | | | | | | | | | | xen_pm_init was unconditionally setting pm_power_off and arm_pm_restart function pointers. This breaks multi-platform kernels. Make this conditional on running as a Xen guest and make it a late_initcall to ensure it is setup after platform code for Dom0. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> CC: stable@vger.kernel.org
* | xen/arm,arm64: update xen_restart after ff701306cd49 and 7b6d864b48d9Stefano Stabellini2013-07-23
| | | | | | | | | | | | | | | | | | Commit 7b6d864b48d9 (reboot: arm: change reboot_mode to use enum reboot_mode) and ff701306cd49 (arm64: use common reboot infrastructure) change the prototype of arm_pm_restart on arm and arm64. Update xen_restart accordingly. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* | xen/arm and xen/arm64: implement HYPERVISOR_tmem_opStefano Stabellini2013-07-04
|/ | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: rename xen_secondary_init and run it on every online cpuStefano Stabellini2013-05-13
| | | | | | | | Rename xen_secondary_init to xen_percpu_init. Run xen_percpu_init on the each online cpu, reuse the current on_each_cpu call. Merge xen_percpu_enable_events into xen_percpu_init. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: do not handle VCPUOP_register_vcpu_info failuresStefano Stabellini2013-05-13
| | | | | | | | We expect VCPUOP_register_vcpu_info to succeed, do not try to handle failures. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
* xen/arm: initialize pm functions laterStefano Stabellini2013-05-13
| | | | | | | | If we are running in dom0, we have to wait for the arch specific code to complete the initialization in order for us to successfully reset the power_off and pm_restart functions. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: remove duplicated include from enlighten.cWei Yongjun2013-04-27
| | | | | | Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
* xen/arm: use sched_op hypercalls for machine reboot and power offStefano Stabellini2013-04-25
| | | | | | | | Changes in v5: - set pm_power_off and arm_pm_restart from the Xen specific intialization code. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: SMP supportStefano Stabellini2013-04-25
| | | | | | | | | | | | | | | | | | Map vcpu_info using VCPUOP_register_vcpu_info on all the online vcpus, make sure the allocated struct doesn't cross a page boundary. Call enable_percpu_irq on every cpu. Changes in v5: - allocate xen_vcpu_info dynamically, aligning it to the size of the struct; - use VCPUOP_register_vcpu_info on cpu0 too. Changed in v2: - move the percpu variable argument fix to a separate patch; - remove unused variable. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: implement HYPERVISOR_vcpu_opStefano Stabellini2013-04-25
| | | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Ian Campbell <ian.campbell@citrix.com>
* xen/arm: actually pass a non-NULL percpu pointer to request_percpu_irqStefano Stabellini2013-04-25
| | | | | | Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Ian Campbell <ian.camjpbell@citrix.com> CC: stable@vger.kernel.org
* xen: implement updated XENMEM_add_to_physmap_range ABIIan Campbell2013-02-19
| | | | | | | | | | Allows for more fine grained error reporting. Only used by PVH and ARM both of which are marked EXPERIMENTAL precisely because the ABI is not yet stable Signed-off-by: Ian Campbell <ian.campbell@citrix.com> [v1: Rebased without PVH patches] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* Merge tag 'stable/for-linus-3.8-rc0-tag' of ↵Linus Torvalds2012-12-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen Pull Xen updates from Konrad Rzeszutek Wilk: - Add necessary infrastructure to make balloon driver work under ARM. - Add /dev/xen/privcmd interfaces to work with ARM and PVH. - Improve Xen PCIBack wild-card parsing. - Add Xen ACPI PAD (Processor Aggregator) support - so can offline/ online sockets depending on the power consumption. - PVHVM + kexec = use an E820_RESV region for the shared region so we don't overwrite said region during kexec reboot. - Cleanups, compile fixes. Fix up some trivial conflicts due to the balloon driver now working on ARM, and there were changes next to the previous work-arounds that are now gone. * tag 'stable/for-linus-3.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/PVonHVM: fix compile warning in init_hvm_pv_info xen: arm: implement remap interfaces needed for privcmd mappings. xen: correctly use xen_pfn_t in remap_domain_mfn_range. xen: arm: enable balloon driver xen: balloon: allow PVMMU interfaces to be compiled out xen: privcmd: support autotranslated physmap guests. xen: add pages parameter to xen_remap_domain_mfn_range xen/acpi: Move the xen_running_on_version_or_later function. xen/xenbus: Remove duplicate inclusion of asm/xen/hypervisor.h xen/acpi: Fix compile error by missing decleration for xen_domain. xen/acpi: revert pad config check in xen_check_mwait xen/acpi: ACPI PAD driver xen-pciback: reject out of range inputs xen-pciback: simplify and tighten parsing of device IDs xen PVonHVM: use E820_Reserved area for shared_info
| * xen: arm: implement remap interfaces needed for privcmd mappings.Ian Campbell2012-11-29
| | | | | | | | | | | | | | | | | | | | We use XENMEM_add_to_physmap_range which is the preferred interface for foreign mappings. Acked-by: Mukesh Rathor <mukesh.rathor@oracle.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| * xen: arm: enable balloon driverIan Campbell2012-11-29
| | | | | | | | | | | | | | | | | | | | | | The code is now in a state where can just enable it. Drop the *_xenballloned_pages duplicates since these are now supplied by the balloon code. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/arm: Fix compile errors when drivers are compiled as modules (export more).Stefano Stabellini2012-11-09
| | | | | | | | | | | | | | | | | | | | | | | | The commit 911dec0db4de6ccc544178a8ddaf9cec0a11d533 "xen/arm: Fix compile errors when drivers are compiled as modules." exports the neccessary functions. But to guard ourselves against out-of-tree modules and future drivers hitting this, lets export all of the relevant hypercalls. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/arm: Fix compile errors when drivers are compiled as modules.Konrad Rzeszutek Wilk2012-11-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We end up with: ERROR: "HYPERVISOR_event_channel_op" [drivers/xen/xen-gntdev.ko] undefined! ERROR: "privcmd_call" [drivers/xen/xen-privcmd.ko] undefined! ERROR: "HYPERVISOR_grant_table_op" [drivers/net/xen-netback/xen-netback.ko] undefined! and this patch exports said function (which is implemented in hypercall.S). Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* | xen/arm: use the __HVC macroStefano Stabellini2012-10-30
|/ | | | | | | Use the new __HVC macro in hypercall.S. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen: grant: use xen_pfn_t type for frame_list.Ian Campbell2012-10-19
| | | | | | | | | | | | This correctly sizes it as 64 bit on ARM but leaves it as unsigned long on x86 (therefore no intended change on x86). The long and ulong guest handles are now unused (and a bit dangerous) so remove them. Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/arm: implement alloc/free_xenballooned_pages with alloc_pages/kfreeStefano Stabellini2012-08-08
| | | | | | | | Only until we get the balloon driver to work. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/arm: receive Xen events on ARMStefano Stabellini2012-09-14
| | | | | | | | | | Compile events.c on ARM. Parse, map and enable the IRQ to get event notifications from the device tree (node "/xen"). Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/arm: initialize grant_table on ARMStefano Stabellini2012-09-13
| | | | | | | | | | | | | | Initialize the grant table mapping at the address specified at index 0 in the DT under the /xen node. After the grant table is initialized, call xenbus_probe (if not dom0). Changes in v2: - introduce GRANT_TABLE_PHYSADDR; - remove unneeded initialization of boot_max_nr_grant_frames. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: get privilege statusStefano Stabellini2012-08-08
| | | | | | | | | | Use Xen features to figure out if we are privileged. XENFEAT_dom0 was introduced by 23735 in xen-unstable.hg. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/arm: Xen detection and shared_info page mappingStefano Stabellini2012-09-14
| | | | | | | | | | | | | | | | | | | | | | | | | Check for a node in the device tree compatible with "xen,xen", if it is present set xen_domain_type to XEN_HVM_DOMAIN and continue initialization. Map the real shared info page using XENMEM_add_to_physmap with XENMAPSPACE_shared_info. Changes in v4: - simpler parsing of Xen version in the compatible DT node. Changes in v3: - use the "xen,xen" notation rather than "arm,xen"; - add an additional check on the presence of the Xen version. Changes in v2: - replace pr_info with pr_debug. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* xen/arm: empty implementation of grant_table arch specific functionsStefano Stabellini2012-08-08
| | | | | | | | | | Changes in v2: - return -ENOSYS rather than -1. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/arm: hypercallsStefano Stabellini2012-09-14
| | | | | | | | | | | | | | | | | | | | | | | | Use r12 to pass the hypercall number to the hypervisor. We need a register to pass the hypercall number because we might not know it at compile time and HVC only takes an immediate argument. Among the available registers r12 seems to be the best choice because it is defined as "intra-procedure call scratch register". Use the ISS to pass an hypervisor specific tag. Changes in v2: - define an HYPERCALL macro for 5 arguments hypercall wrappers, even if at the moment is unused; - use ldm instead of pop; - fix up comments. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* arm: initial Xen supportStefano Stabellini2012-09-14
- Basic hypervisor.h and interface.h definitions. - Skeleton enlighten.c, set xen_start_info to an empty struct. - Make xen_initial_domain dependent on the SIF_PRIVILIGED_BIT. The new code only compiles when CONFIG_XEN is set, that is going to be added to arch/arm/Kconfig in patch #11 "xen/arm: introduce CONFIG_XEN on ARM". Changes in v3: - improve comments. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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