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2019-05-21treewide: Add SPDX license identifier for missed filesThomas Gleixner1-0/+1
Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2019-04-30xen/arm: Use p2m entry with lock protectionHillf Danton1-1/+2
A new local variable is introduced for accessing p2m entry with lock protection. Signed-off-by: Hillf Danton <[email protected]> Signed-off-by: Stefano Stabellini <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
2019-04-30xen/arm: Free p2m entry if fail to add it to RB treeHillf Danton1-0/+1
Release the newly allocated p2m entry if we detect a duplicate in the RB tree. Signed-off-by: Hillf Danton <[email protected]> Signed-off-by: Stefano Stabellini <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
2018-10-31mm: remove include/linux/bootmem.hMike Rapoport1-1/+1
Move remaining definitions and declarations from include/linux/bootmem.h into include/linux/memblock.h and remove the redundant header. The includes were replaced with the semantic patch below and then semi-automated removal of duplicated '#include <linux/memblock.h> @@ @@ - #include <linux/bootmem.h> + #include <linux/memblock.h> [[email protected]: dma-direct: fix up for the removal of linux/bootmem.h] Link: http://lkml.kernel.org/r/[email protected] [[email protected]: powerpc: fix up for removal of linux/bootmem.h] Link: http://lkml.kernel.org/r/[email protected] [[email protected]: x86/kaslr, ACPI/NUMA: fix for linux/bootmem.h removal] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mike Rapoport <[email protected]> Signed-off-by: Stephen Rothwell <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Chris Zankel <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Greentime Hu <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Guan Xuetao <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Jonas Bonn <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Ley Foon Tan <[email protected]> Cc: Mark Salter <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Matt Turner <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Michal Simek <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Paul Burton <[email protected]> Cc: Richard Kuo <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: Rich Felker <[email protected]> Cc: Russell King <[email protected]> Cc: Serge Semin <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Tony Luck <[email protected]> Cc: Vineet Gupta <[email protected]> Cc: Yoshinori Sato <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2017-10-26arm/xen: don't inclide rwlock.h directly.Sebastian Andrzej Siewior1-1/+1
rwlock.h should not be included directly. Instead linux/splinlock.h should be included. One thing it does is to break the RT build. Cc: Stefano Stabellini <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Sebastian Andrzej Siewior <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]> Signed-off-by: Boris Ostrovsky <[email protected]>
2017-06-05arm/xen: Adjust one function call together with a variable assignmentMarkus Elfring1-1/+2
The script "checkpatch.pl" pointed information out like the following. ERROR: do not use assignment in if condition Thus fix the affected source code place. Signed-off-by: Markus Elfring <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
2017-06-05arm/xen: Delete an error message for a failed memory allocation in ↵Markus Elfring1-3/+2
__set_phys_to_machine_multi() Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf Signed-off-by: Markus Elfring <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
2017-06-05arm/xen: Improve a size determination in __set_phys_to_machine_multi()Markus Elfring1-1/+1
Replace the specification of a data structure by a pointer dereference as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
2015-10-23xen/grant-table: Make it running on 64KB granularityJulien Grall1-3/+3
The Xen interface is using 4KB page granularity. This means that each grant is 4KB. The current implementation allocates a Linux page per grant. On Linux using 64KB page granularity, only the first 4KB of the page will be used. We could decrease the memory wasted by sharing the page with multiple grant. It will require some care with the {Set,Clear}ForeignPage macro. Note that no changes has been made in the x86 code because both Linux and Xen will only use 4KB page granularity. Signed-off-by: Julien Grall <[email protected]> Reviewed-by: David Vrabel <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]> Signed-off-by: David Vrabel <[email protected]>
2015-06-17xen: Include xen/page.h rather than asm/xen/page.hJulien Grall1-1/+1
Using xen/page.h will be necessary later for using common xen page helpers. As xen/page.h already include asm/xen/page.h, always use the later. Signed-off-by: Julien Grall <[email protected]> Reviewed-by: David Vrabel <[email protected]> Cc: Stefano Stabellini <[email protected]> Cc: Ian Campbell <[email protected]> Cc: Wei Liu <[email protected]> Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: [email protected] Signed-off-by: David Vrabel <[email protected]>
2015-01-28xen/grant-table: pre-populate kernel unmap ops for xen_gnttab_unmap_refs()David Vrabel1-1/+1
When unmapping grants, instead of converting the kernel map ops to unmap ops on the fly, pre-populate the set of unmap ops. This allows the grant unmap for the kernel mappings to be trivially batched in the future. Signed-off-by: David Vrabel <[email protected]> Reviewed-by: Stefano Stabellini <[email protected]>
2014-09-11xen/arm: remove mach_to_phys rbtreeStefano Stabellini1-65/+1
Remove the rbtree used to keep track of machine to physical mappings: the frontend can grant the same page multiple times, leading to errors inserting or removing entries from the mach_to_phys tree. Linux only needed to know the physical address corresponding to a given machine address in swiotlb-xen. Now that swiotlb-xen can call the xen_dma_* functions passing the machine address directly, we can remove it. Signed-off-by: Stefano Stabellini <[email protected]> Tested-by: Denis Schneider <[email protected]>
2014-03-18xen/grant-table: Refactor gnttab_[un]map_refs to avoid m2p_overrideZoltan Kiss1-0/+32
The grant mapping API does m2p_override unnecessarily: only gntdev needs it, for blkback and future netback patches it just cause a lock contention, as those pages never go to userspace. Therefore this series does the following: - the bulk of the original function (everything after the mapping hypercall) is moved to arch-dependent set/clear_foreign_p2m_mapping - the "if (xen_feature(XENFEAT_auto_translated_physmap))" branch goes to ARM - therefore the ARM function could be much smaller, the m2p_override stubs could be also removed - on x86 the set_phys_to_machine calls were moved up to this new funcion from m2p_override functions - and m2p_override functions are only called when there is a kmap_ops param It also removes a stray space from arch/x86/include/asm/xen/page.h. Signed-off-by: Zoltan Kiss <[email protected]> Suggested-by: Anthony Liguori <[email protected]> Suggested-by: David Vrabel <[email protected]> Suggested-by: Stefano Stabellini <[email protected]> Signed-off-by: David Vrabel <[email protected]> Signed-off-by: Stefano Stabellini <[email protected]>
2013-11-18xen/arm: p2m_init and p2m_lock should be staticStefano Stabellini1-2/+2
Signed-off-by: Stefano Stabellini <[email protected]>
2013-11-18arm/xen: Export phys_to_mach to fix Xen module link errorsJosh Boyer1-0/+1
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 <[email protected]> Signed-off-by: Stefano Stabellini <[email protected]>
2013-11-08Merge remote-tracking branch 'stefano/swiotlb-xen-9.1' into ↵Konrad Rzeszutek Wilk1-0/+208
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 <[email protected]> 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]
2013-10-17arm/xen,arm64/xen: introduce p2mStefano Stabellini1-0/+208
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 <[email protected]> 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.
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