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2019-09-11swiotlb-xen: simplify cache maintainanceChristoph Hellwig
Now that we know we always have the dma-noncoherent.h helpers available if we are on an architecture with support for non-coherent devices, we can just call them directly, and remove the calls to the dma-direct routines, including the fact that we call the dma_direct_map_page routines but ignore the value returned from it. Instead we now have Xen wrappers for the arch_sync_dma_for_{device,cpu} helpers that call the special Xen versions of those routines for foreign pages. Note that the new helpers get the physical address passed in addition to the dma address to avoid another translation for the local cache maintainance. The pfn_valid checks remain on the dma address as in the old code, even if that looks a little funny. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2019-09-11xen: remove the exports for xen_{create,destroy}_contiguous_regionChristoph Hellwig
These routines are only used by swiotlb-xen, which cannot be modular. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2019-09-11xen/arm: remove xen_dma_opsChristoph Hellwig
arm and arm64 can just use xen_swiotlb_dma_ops directly like x86, no need for a pointer indirection. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Julien Grall <julien.grall@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2019-09-11xen/arm: simplify dma_cache_maintChristoph Hellwig
Calculate the required operation in the caller, and pass it directly instead of recalculating it for each page, and use simple arithmetics to get from the physical address to Xen page size aligned chunks. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2019-09-11xen/arm: use dev_is_dma_coherentChristoph Hellwig
Use the dma-noncoherent dev_is_dma_coherent helper instead of the home grown variant. Note that both are always initialized to the same value in arch_setup_dma_ops. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Julien Grall <julien.grall@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2019-05-21treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13Thomas Gleixner
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details [based] [from] [clk] [highbank] [c] you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 355 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154041.837383322@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form 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 <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier for missed filesThomas Gleixner
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 <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-30xen/arm: Use p2m entry with lock protectionHillf Danton
A new local variable is introduced for accessing p2m entry with lock protection. Signed-off-by: Hillf Danton <hdanton@sina.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2019-04-30xen/arm: Free p2m entry if fail to add it to RB treeHillf Danton
Release the newly allocated p2m entry if we detect a duplicate in the RB tree. Signed-off-by: Hillf Danton <hdanton@sina.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2019-03-04get rid of legacy 'get_ds()' functionLinus Torvalds
Every in-kernel use of this function defined it to KERNEL_DS (either as an actual define, or as an inline function). It's an entirely historical artifact, and long long long ago used to actually read the segment selector valueof '%ds' on x86. Which in the kernel is always KERNEL_DS. Inspired by a patch from Jann Horn that just did this for a very small subset of users (the ones in fs/), along with Al who suggested a script. I then just took it to the logical extreme and removed all the remaining gunk. Roughly scripted with git grep -l '(get_ds())' -- :^tools/ | xargs sed -i 's/(get_ds())/(KERNEL_DS)/' git grep -lw 'get_ds' -- :^tools/ | xargs sed -i '/^#define get_ds()/d' plus manual fixups to remove a few unusual usage patterns, the couple of inline function cases and to fix up a comment that had become stale. The 'get_ds()' function remains in an x86 kvm selftest, since in user space it actually does something relevant. Inspired-by: Jann Horn <jannh@google.com> Inspired-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-28arch/arm/xen: Remove duplicate headerSouptick Joarder
Remove duplicate header which is included twice. Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2018-10-31mm: remove include/linux/bootmem.hMike Rapoport
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> [sfr@canb.auug.org.au: dma-direct: fix up for the removal of linux/bootmem.h] Link: http://lkml.kernel.org/r/20181002185342.133d1680@canb.auug.org.au [sfr@canb.auug.org.au: powerpc: fix up for removal of linux/bootmem.h] Link: http://lkml.kernel.org/r/20181005161406.73ef8727@canb.auug.org.au [sfr@canb.auug.org.au: x86/kaslr, ACPI/NUMA: fix for linux/bootmem.h removal] Link: http://lkml.kernel.org/r/20181008190341.5e396491@canb.auug.org.au Link: http://lkml.kernel.org/r/1536927045-23536-30-git-send-email-rppt@linux.vnet.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Jonas Bonn <jonas@southpole.se> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ley Foon Tan <lftan@altera.com> Cc: Mark Salter <msalter@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Serge Semin <fancer.lancer@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-09-03x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.cJuergen Gross
There are some PV specific functions in arch/x86/xen/mmu.c which can be moved to mmu_pv.c. This in turn enables to build multicalls.c dependent on CONFIG_XEN_PV. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: xen-devel@lists.xenproject.org Cc: virtualization@lists.linux-foundation.org Cc: akataria@vmware.com Cc: rusty@rustcorp.com.au Cc: hpa@zytor.com Link: https://lkml.kernel.org/r/20180828074026.820-3-jgross@suse.com
2018-06-19xen: share start flags between PV and PVHRoger Pau Monne
Use a global variable to store the start flags for both PV and PVH. This allows the xen_initial_domain macro to work properly on PVH. Note that ARM is also switched to use the new variable. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2018-05-14xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCEPaul Durrant
My recent Xen patch series introduces a new HYPERVISOR_memory_op to support direct priv-mapping of certain guest resources (such as ioreq pages, used by emulators) by a tools domain, rather than having to access such resources via the guest P2M. This patch adds the necessary infrastructure to the privcmd driver and Xen MMU code to support direct resource mapping. NOTE: The adjustment in the MMU code is partially cosmetic. Xen will now allow a PV tools domain to map guest pages either by GFN or MFN, thus the term 'mfn' has been swapped for 'pfn' in the lower layers of the remap code. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-11-06xen: re-introduce support for grant v2 interfaceJuergen Gross
The grant v2 support was removed from the kernel with commit 438b33c7145ca8a5131a30c36d8f59bce119a19a ("xen/grant-table: remove support for V2 tables") as the higher memory footprint of v2 grants resulted in less grants being possible for a kernel compared to the v1 grant interface. As machines with more than 16TB of memory are expected to be more common in the near future support of grant v2 is mandatory in order to be able to run a Xen pv domain at any memory location. So re-add grant v2 support basically by reverting above commit. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-10-26arm/xen: don't inclide rwlock.h directly.Sebastian Andrzej Siewior
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 <sstabellini@kernel.org> Cc: xen-devel@lists.xenproject.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-07-06Merge tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mappingLinus Torvalds
Pull dma-mapping infrastructure from Christoph Hellwig: "This is the first pull request for the new dma-mapping subsystem In this new subsystem we'll try to properly maintain all the generic code related to dma-mapping, and will further consolidate arch code into common helpers. This pull request contains: - removal of the DMA_ERROR_CODE macro, replacing it with calls to ->mapping_error so that the dma_map_ops instances are more self contained and can be shared across architectures (me) - removal of the ->set_dma_mask method, which duplicates the ->dma_capable one in terms of functionality, but requires more duplicate code. - various updates for the coherent dma pool and related arm code (Vladimir) - various smaller cleanups (me)" * tag 'dma-mapping-4.13' of git://git.infradead.org/users/hch/dma-mapping: (56 commits) ARM: dma-mapping: Remove traces of NOMMU code ARM: NOMMU: Set ARM_DMA_MEM_BUFFERABLE for M-class cpus ARM: NOMMU: Introduce dma operations for noMMU drivers: dma-mapping: allow dma_common_mmap() for NOMMU drivers: dma-coherent: Introduce default DMA pool drivers: dma-coherent: Account dma_pfn_offset when used with device tree dma: Take into account dma_pfn_offset dma-mapping: replace dmam_alloc_noncoherent with dmam_alloc_attrs dma-mapping: remove dmam_free_noncoherent crypto: qat - avoid an uninitialized variable warning au1100fb: remove a bogus dma_free_nonconsistent call MAINTAINERS: add entry for dma mapping helpers powerpc: merge __dma_set_mask into dma_set_mask dma-mapping: remove the set_dma_mask method powerpc/cell: use the dma_supported method for ops switching powerpc/cell: clean up fixed mapping dma_ops initialization tile: remove dma_supported and mapping_error methods xen-swiotlb: remove xen_swiotlb_set_dma_mask arm: implement ->dma_supported instead of ->set_dma_mask mips/loongson64: implement ->dma_supported instead of ->set_dma_mask ...
2017-06-20xen-swiotlb: consolidate xen_swiotlb_dma_opsChristoph Hellwig
ARM and x86 had duplicated versions of the dma_ops structure, the only difference is that x86 hasn't wired up the set_dma_mask, mmap, and get_sgtable ops yet. On x86 all of them are identical to the generic version, so they aren't needed but harmless. All the symbols used only for xen_swiotlb_dma_ops can now be marked static as well. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2017-06-05arm/xen: Adjust one function call together with a variable assignmentMarkus Elfring
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 <elfring@users.sourceforge.net> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2017-06-05arm/xen: Delete an error message for a failed memory allocation in ↵Markus Elfring
__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 <elfring@users.sourceforge.net> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2017-06-05arm/xen: Improve a size determination in __set_phys_to_machine_multi()Markus Elfring
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 <elfring@users.sourceforge.net> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
2017-05-02xen: Implement EFI reset_system callbackJulien Grall
When rebooting DOM0 with ACPI on ARM64, the kernel is crashing with the stack trace [1]. This is happening because when EFI runtimes are enabled, the reset code (see machine_restart) will first try to use EFI restart method. However, the EFI restart code is expecting the reset_system callback to be always set. This is not the case for Xen and will lead to crash. The EFI restart helper is used in multiple places and some of them don't not have fallback (see machine_power_off). So implement reset_system callback as a call to xen_reboot when using EFI Xen. [ 36.999270] reboot: Restarting system [ 37.002921] Internal error: Attempting to execute userspace memory: 86000004 [#1] PREEMPT SMP [ 37.011460] Modules linked in: [ 37.014598] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.11.0-rc1-00003-g1e248b60a39b-dirty #506 [ 37.023903] Hardware name: (null) (DT) [ 37.027734] task: ffff800902068000 task.stack: ffff800902064000 [ 37.033739] PC is at 0x0 [ 37.036359] LR is at efi_reboot+0x94/0xd0 [ 37.040438] pc : [<0000000000000000>] lr : [<ffff00000880f2c4>] pstate: 404001c5 [ 37.047920] sp : ffff800902067cf0 [ 37.051314] x29: ffff800902067cf0 x28: ffff800902068000 [ 37.056709] x27: ffff000008992000 x26: 000000000000008e [ 37.062104] x25: 0000000000000123 x24: 0000000000000015 [ 37.067499] x23: 0000000000000000 x22: ffff000008e6e250 [ 37.072894] x21: ffff000008e6e000 x20: 0000000000000000 [ 37.078289] x19: ffff000008e5d4c8 x18: 0000000000000010 [ 37.083684] x17: 0000ffffa7c27470 x16: 00000000deadbeef [ 37.089079] x15: 0000000000000006 x14: ffff000088f42bef [ 37.094474] x13: ffff000008f42bfd x12: ffff000008e706c0 [ 37.099870] x11: ffff000008e70000 x10: 0000000005f5e0ff [ 37.105265] x9 : ffff800902067a50 x8 : 6974726174736552 [ 37.110660] x7 : ffff000008cc6fb8 x6 : ffff000008cc6fb0 [ 37.116055] x5 : ffff000008c97dd8 x4 : 0000000000000000 [ 37.121453] x3 : 0000000000000000 x2 : 0000000000000000 [ 37.126845] x1 : 0000000000000000 x0 : 0000000000000000 [ 37.132239] [ 37.133808] Process systemd-shutdow (pid: 1, stack limit = 0xffff800902064000) [ 37.141118] Stack: (0xffff800902067cf0 to 0xffff800902068000) [ 37.146949] 7ce0: ffff800902067d40 ffff000008085334 [ 37.154869] 7d00: 0000000000000000 ffff000008f3b000 ffff800902067d40 ffff0000080852e0 [ 37.162787] 7d20: ffff000008cc6fb0 ffff000008cc6fb8 ffff000008c7f580 ffff000008c97dd8 [ 37.170706] 7d40: ffff800902067d60 ffff0000080e2c2c 0000000000000000 0000000001234567 [ 37.178624] 7d60: ffff800902067d80 ffff0000080e2ee8 0000000000000000 ffff0000080e2df4 [ 37.186544] 7d80: 0000000000000000 ffff0000080830f0 0000000000000000 00008008ff1c1000 [ 37.194462] 7da0: ffffffffffffffff 0000ffffa7c4b1cc 0000000000000000 0000000000000024 [ 37.202380] 7dc0: ffff800902067dd0 0000000000000005 0000fffff24743c8 0000000000000004 [ 37.210299] 7de0: 0000fffff2475f03 0000000000000010 0000fffff2474418 0000000000000005 [ 37.218218] 7e00: 0000fffff2474578 000000000000000a 0000aaaad6b722c0 0000000000000001 [ 37.226136] 7e20: 0000000000000123 0000000000000038 ffff800902067e50 ffff0000081e7294 [ 37.234055] 7e40: ffff800902067e60 ffff0000081e935c ffff800902067e60 ffff0000081e9388 [ 37.241973] 7e60: ffff800902067eb0 ffff0000081ea388 0000000000000000 00008008ff1c1000 [ 37.249892] 7e80: ffffffffffffffff 0000ffffa7c4a79c 0000000000000000 ffff000000020000 [ 37.257810] 7ea0: 0000010000000004 0000000000000000 0000000000000000 ffff0000080830f0 [ 37.265729] 7ec0: fffffffffee1dead 0000000028121969 0000000001234567 0000000000000000 [ 37.273651] 7ee0: ffffffffffffffff 8080000000800000 0000800000008080 feffa9a9d4ff2d66 [ 37.281567] 7f00: 000000000000008e feffa9a9d5b60e0f 7f7fffffffff7f7f 0101010101010101 [ 37.289485] 7f20: 0000000000000010 0000000000000008 000000000000003a 0000ffffa7ccf588 [ 37.297404] 7f40: 0000aaaad6b87d00 0000ffffa7c4b1b0 0000fffff2474be0 0000aaaad6b88000 [ 37.305326] 7f60: 0000fffff2474fb0 0000000001234567 0000000000000000 0000000000000000 [ 37.313240] 7f80: 0000000000000000 0000000000000001 0000aaaad6b70d4d 0000000000000000 [ 37.321159] 7fa0: 0000000000000001 0000fffff2474ea0 0000aaaad6b5e2e0 0000fffff2474e80 [ 37.329078] 7fc0: 0000ffffa7c4b1cc 0000000000000000 fffffffffee1dead 000000000000008e [ 37.336997] 7fe0: 0000000000000000 0000000000000000 9ce839cffee77eab fafdbf9f7ed57f2f [ 37.344911] Call trace: [ 37.347437] Exception stack(0xffff800902067b20 to 0xffff800902067c50) [ 37.353970] 7b20: ffff000008e5d4c8 0001000000000000 0000000080f82000 0000000000000000 [ 37.361883] 7b40: ffff800902067b60 ffff000008e17000 ffff000008f44c68 00000001081081b4 [ 37.369802] 7b60: ffff800902067bf0 ffff000008108478 0000000000000000 ffff000008c235b0 [ 37.377721] 7b80: ffff800902067ce0 0000000000000000 0000000000000000 0000000000000015 [ 37.385643] 7ba0: 0000000000000123 000000000000008e ffff000008992000 ffff800902068000 [ 37.393557] 7bc0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 37.401477] 7be0: 0000000000000000 ffff000008c97dd8 ffff000008cc6fb0 ffff000008cc6fb8 [ 37.409396] 7c00: 6974726174736552 ffff800902067a50 0000000005f5e0ff ffff000008e70000 [ 37.417318] 7c20: ffff000008e706c0 ffff000008f42bfd ffff000088f42bef 0000000000000006 [ 37.425234] 7c40: 00000000deadbeef 0000ffffa7c27470 [ 37.430190] [< (null)>] (null) [ 37.434982] [<ffff000008085334>] machine_restart+0x6c/0x70 [ 37.440550] [<ffff0000080e2c2c>] kernel_restart+0x6c/0x78 [ 37.446030] [<ffff0000080e2ee8>] SyS_reboot+0x130/0x228 [ 37.451337] [<ffff0000080830f0>] el0_svc_naked+0x24/0x28 [ 37.456737] Code: bad PC value [ 37.459891] ---[ end trace 76e2fc17e050aecd ]--- Signed-off-by: Julien Grall <julien.grall@arm.com> -- Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org The x86 code has theoritically a similar issue, altought EFI does not seem to be the preferred method. I have only built test it on x86. This should also probably be fixed in stable tree. Changes in v2: - Implement xen_efi_reset_system using xen_reboot - Move xen_efi_reset_system in drivers/xen/efi.c Signed-off-by: Juergen Gross <jgross@suse.com>
2017-05-02arm/xen: Consolidate calls to shutdown hypercall in a single helperJulien Grall
Signed-off-by: Julien Grall <julien.grall@arm.com> Signed-off-by: Juergen Gross <jgross@suse.com>
2017-03-07Merge branch 'stable/for-linus-4.11' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb Pull swiotlb updates from Konrad Rzeszutek Wilk: "Two tiny implementations of the DMA API for callback in ARM (for Xen)" * 'stable/for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb: swiotlb-xen: implement xen_swiotlb_get_sgtable callback swiotlb-xen: implement xen_swiotlb_dma_mmap callback
2017-02-25Merge tag 'for-next-dma_ops' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma Pull rdma DMA mapping updates from Doug Ledford: "Drop IB DMA mapping code and use core DMA code instead. Bart Van Assche noted that the ib DMA mapping code was significantly similar enough to the core DMA mapping code that with a few changes it was possible to remove the IB DMA mapping code entirely and switch the RDMA stack to use the core DMA mapping code. This resulted in a nice set of cleanups, but touched the entire tree and has been kept separate for that reason." * tag 'for-next-dma_ops' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (37 commits) IB/rxe, IB/rdmavt: Use dma_virt_ops instead of duplicating it IB/core: Remove ib_device.dma_device nvme-rdma: Switch from dma_device to dev.parent RDS: net: Switch from dma_device to dev.parent IB/srpt: Modify a debug statement IB/srp: Switch from dma_device to dev.parent IB/iser: Switch from dma_device to dev.parent IB/IPoIB: Switch from dma_device to dev.parent IB/rxe: Switch from dma_device to dev.parent IB/vmw_pvrdma: Switch from dma_device to dev.parent IB/usnic: Switch from dma_device to dev.parent IB/qib: Switch from dma_device to dev.parent IB/qedr: Switch from dma_device to dev.parent IB/ocrdma: Switch from dma_device to dev.parent IB/nes: Remove a superfluous assignment statement IB/mthca: Switch from dma_device to dev.parent IB/mlx5: Switch from dma_device to dev.parent IB/mlx4: Switch from dma_device to dev.parent IB/i40iw: Remove a superfluous assignment statement IB/hns: Switch from dma_device to dev.parent ...
2017-02-14xen/privcmd: Add IOCTL_PRIVCMD_DM_OPPaul Durrant
Recently a new dm_op[1] hypercall was added to Xen to provide a mechanism for restricting device emulators (such as QEMU) to a limited set of hypervisor operations, and being able to audit those operations in the kernel of the domain in which they run. This patch adds IOCTL_PRIVCMD_DM_OP as gateway for __HYPERVISOR_dm_op. NOTE: There is no requirement for user-space code to bounce data through locked memory buffers (as with IOCTL_PRIVCMD_HYPERCALL) since privcmd has enough information to lock the original buffers directly. [1] http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=524a98c2 Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-02-13swiotlb-xen: implement xen_swiotlb_get_sgtable callbackAndrii Anisov
Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
2017-02-13swiotlb-xen: implement xen_swiotlb_dma_mmap callbackStefano Stabellini
This function creates userspace mapping for the DMA-coherent memory. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Oleksandr Dmytryshyn <oleksandr.dmytryshyn@globallogic.com> Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
2017-01-24treewide: Constify most dma_map_ops structuresBart Van Assche
Most dma_map_ops structures are never modified. Constify these structures such that these can be write-protected. This patch has been generated as follows: git grep -l 'struct dma_map_ops' | xargs -d\\n sed -i \ -e 's/struct dma_map_ops/const struct dma_map_ops/g' \ -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \ -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \ -e 's/const const struct dma_map_ops /const struct dma_map_ops /g'; sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \ $(git grep -l 'struct dma_map_ops intel_dma_ops'); sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \ $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc); sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \ -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \ -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \ drivers/pci/host/*.c sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Russell King <linux@armlinux.org.uk> Cc: x86@kernel.org Signed-off-by: Doug Ledford <dledford@redhat.com>
2016-12-25cpu/hotplug: Cleanup state namesThomas Gleixner
When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-13Merge tag 'for-linus-4.10-rc0-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen updates from Juergen Gross: "Xen features and fixes for 4.10 These are some fixes, a move of some arm related headers to share them between arm and arm64 and a series introducing a helper to make code more readable. The most notable change is David stepping down as maintainer of the Xen hypervisor interface. This results in me sending you the pull requests for Xen related code from now on" * tag 'for-linus-4.10-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (29 commits) xen/balloon: Only mark a page as managed when it is released xenbus: fix deadlock on writes to /proc/xen/xenbus xen/scsifront: don't request a slot on the ring until request is ready xen/x86: Increase xen_e820_map to E820_X_MAX possible entries x86: Make E820_X_MAX unconditionally larger than E820MAX xen/pci: Bubble up error and fix description. xen: xenbus: set error code on failure xen: set error code on failures arm/xen: Use alloc_percpu rather than __alloc_percpu arm/arm64: xen: Move shared architecture headers to include/xen/arm xen/events: use xen_vcpu_id mapping for EVTCHNOP_status xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing xen-scsifront: Add a missing call to kfree MAINTAINERS: update XEN HYPERVISOR INTERFACE xenfs: Use proc_create_mount_point() to create /proc/xen xen-platform: use builtin_pci_driver xen-netback: fix error handling output xen: make use of xenbus_read_unsigned() in xenbus xen: make use of xenbus_read_unsigned() in xen-pciback xen: make use of xenbus_read_unsigned() in xen-fbfront ...
2016-12-07arm/xen: Use alloc_percpu rather than __alloc_percpuJulien Grall
The function xen_guest_init is using __alloc_percpu with an alignment which are not power of two. However, the percpu allocator never supported alignments which are not power of two and has always behaved incorectly in thise case. Commit 3ca45a4 "percpu: ensure requested alignment is power of two" introduced a check which trigger a warning [1] when booting linux-next on Xen. But in reality this bug was always present. This can be fixed by replacing the call to __alloc_percpu with alloc_percpu. The latter will use an alignment which are a power of two. [1] [ 0.023921] illegal size (48) or align (48) for percpu allocation [ 0.024167] ------------[ cut here ]------------ [ 0.024344] WARNING: CPU: 0 PID: 1 at linux/mm/percpu.c:892 pcpu_alloc+0x88/0x6c0 [ 0.024584] Modules linked in: [ 0.024708] [ 0.024804] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc7-next-20161128 #473 [ 0.025012] Hardware name: Foundation-v8A (DT) [ 0.025162] task: ffff80003d870000 task.stack: ffff80003d844000 [ 0.025351] PC is at pcpu_alloc+0x88/0x6c0 [ 0.025490] LR is at pcpu_alloc+0x88/0x6c0 [ 0.025624] pc : [<ffff00000818e678>] lr : [<ffff00000818e678>] pstate: 60000045 [ 0.025830] sp : ffff80003d847cd0 [ 0.025946] x29: ffff80003d847cd0 x28: 0000000000000000 [ 0.026147] x27: 0000000000000000 x26: 0000000000000000 [ 0.026348] x25: 0000000000000000 x24: 0000000000000000 [ 0.026549] x23: 0000000000000000 x22: 00000000024000c0 [ 0.026752] x21: ffff000008e97000 x20: 0000000000000000 [ 0.026953] x19: 0000000000000030 x18: 0000000000000010 [ 0.027155] x17: 0000000000000a3f x16: 00000000deadbeef [ 0.027357] x15: 0000000000000006 x14: ffff000088f79c3f [ 0.027573] x13: ffff000008f79c4d x12: 0000000000000041 [ 0.027782] x11: 0000000000000006 x10: 0000000000000042 [ 0.027995] x9 : ffff80003d847a40 x8 : 6f697461636f6c6c [ 0.028208] x7 : 6120757063726570 x6 : ffff000008f79c84 [ 0.028419] x5 : 0000000000000005 x4 : 0000000000000000 [ 0.028628] x3 : 0000000000000000 x2 : 000000000000017f [ 0.028840] x1 : ffff80003d870000 x0 : 0000000000000035 [ 0.029056] [ 0.029152] ---[ end trace 0000000000000000 ]--- [ 0.029297] Call trace: [ 0.029403] Exception stack(0xffff80003d847b00 to 0xffff80003d847c30) [ 0.029621] 7b00: 0000000000000030 0001000000000000 ffff80003d847cd0 ffff00000818e678 [ 0.029901] 7b20: 0000000000000002 0000000000000004 ffff000008f7c060 0000000000000035 [ 0.030153] 7b40: ffff000008f79000 ffff000008c4cd88 ffff80003d847bf0 ffff000008101778 [ 0.030402] 7b60: 0000000000000030 0000000000000000 ffff000008e97000 00000000024000c0 [ 0.030647] 7b80: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 0.030895] 7ba0: 0000000000000035 ffff80003d870000 000000000000017f 0000000000000000 [ 0.031144] 7bc0: 0000000000000000 0000000000000005 ffff000008f79c84 6120757063726570 [ 0.031394] 7be0: 6f697461636f6c6c ffff80003d847a40 0000000000000042 0000000000000006 [ 0.031643] 7c00: 0000000000000041 ffff000008f79c4d ffff000088f79c3f 0000000000000006 [ 0.031877] 7c20: 00000000deadbeef 0000000000000a3f [ 0.032051] [<ffff00000818e678>] pcpu_alloc+0x88/0x6c0 [ 0.032229] [<ffff00000818ece8>] __alloc_percpu+0x18/0x20 [ 0.032409] [<ffff000008d9606c>] xen_guest_init+0x174/0x2f4 [ 0.032591] [<ffff0000080830f8>] do_one_initcall+0x38/0x130 [ 0.032783] [<ffff000008d90c34>] kernel_init_freeable+0xe0/0x248 [ 0.032995] [<ffff00000899a890>] kernel_init+0x10/0x100 [ 0.033172] [<ffff000008082ec0>] ret_from_fork+0x10/0x50 Reported-by: Wei Chen <wei.chen@arm.com> Link: https://lkml.org/lkml/2016/11/28/669 Signed-off-by: Julien Grall <julien.grall@arm.com> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Cc: stable@vger.kernel.org
2016-11-07swiotlb-xen: Enforce return of DMA_ERROR_CODE in mapping functionAlexander Duyck
The mapping function should always return DMA_ERROR_CODE when a mapping has failed as this is what the DMA API expects when a DMA error has occurred. The current function for mapping a page in Xen was returning either DMA_ERROR_CODE or 0 depending on where it failed. On x86 DMA_ERROR_CODE is 0, but on other architectures such as ARM it is ~0. We need to make sure we return the same error value if either the mapping failed or the device is not capable of accessing the mapping. If we are returning DMA_ERROR_CODE as our error value we can drop the function for checking the error code as the default is to compare the return value against DMA_ERROR_CODE if no function is defined. Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
2016-09-14arm/xen: fix SMP guests bootVitaly Kuznetsov
Commit 88e957d6e47f ("xen: introduce xen_vcpu_id mapping") broke SMP ARM guests on Xen. When FIFO-based event channels are in use (this is the default), evtchn_fifo_alloc_control_block() is called on CPU_UP_PREPARE event and this happens before we set up xen_vcpu_id mapping in xen_starting_cpu. Temporary fix the issue by setting direct Linux CPU id <-> Xen vCPU id mapping for all possible CPUs at boot. We don't currently support kexec/kdump on Xen/ARM so these ids always match. In future, we have several ways to solve the issue, e.g.: - Eliminate all hypercalls from CPU_UP_PREPARE, do them from the starting CPU. This can probably be done for both x86 and ARM and, if done, will allow us to get Xen's idea of vCPU id from CPUID/MPIDR on the starting CPU directly, no messing with ACPI/device tree required. - Save vCPU id information from ACPI/device tree on ARM and use it to initialize xen_vcpu_id mapping. This is the same trick we currently do on x86. Reported-by: Julien Grall <julien.grall@arm.com> Tested-by: Wei Chen <Wei.Chen@arm.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-08-24xen: change the type of xen_vcpu_id to uint32_tVitaly Kuznetsov
We pass xen_vcpu_id mapping information to hypercalls which require uint32_t type so it would be cleaner to have it as uint32_t. The initializer to -1 can be dropped as we always do the mapping before using it and we never check the 'not set' value anyway. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-08-04dma-mapping: use unsigned long for dma_attrsKrzysztof Kozlowski
The dma-mapping core and the implementations do not change the DMA attributes passed by pointer. Thus the pointer can point to const data. However the attributes do not have to be a bitfield. Instead unsigned long will do fine: 1. This is just simpler. Both in terms of reading the code and setting attributes. Instead of initializing local attributes on the stack and passing pointer to it to dma_set_attr(), just set the bits. 2. It brings safeness and checking for const correctness because the attributes are passed by value. Semantic patches for this change (at least most of them): virtual patch virtual context @r@ identifier f, attrs; @@ f(..., - struct dma_attrs *attrs + unsigned long attrs , ...) { ... } @@ identifier r.f; @@ f(..., - NULL + 0 ) and // Options: --all-includes virtual patch virtual context @r@ identifier f, attrs; type t; @@ t f(..., struct dma_attrs *attrs); @@ identifier r.f; @@ f(..., - NULL + 0 ) Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> Acked-by: Mark Salter <msalter@redhat.com> [c6x] Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> [cris] Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> [drm] Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Fabien Dessenne <fabien.dessenne@st.com> [bdisp] Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> [vb2-core] Acked-by: David Vrabel <david.vrabel@citrix.com> [xen] Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen swiotlb] Acked-by: Joerg Roedel <jroedel@suse.de> [iommu] Acked-by: Richard Kuo <rkuo@codeaurora.org> [hexagon] Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> [s390] Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no> [avr32] Acked-by: Vineet Gupta <vgupta@synopsys.com> [arc] Acked-by: Robin Murphy <robin.murphy@arm.com> [arm64 and dma-iommu] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-29Merge branch 'smp-hotplug-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull smp hotplug updates from Thomas Gleixner: "This is the next part of the hotplug rework. - Convert all notifiers with a priority assigned - Convert all CPU_STARTING/DYING notifiers The final removal of the STARTING/DYING infrastructure will happen when the merge window closes. Another 700 hundred line of unpenetrable maze gone :)" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) timers/core: Correct callback order during CPU hot plug leds/trigger/cpu: Move from CPU_STARTING to ONLINE level powerpc/numa: Convert to hotplug state machine arm/perf: Fix hotplug state machine conversion irqchip/armada: Avoid unused function warnings ARC/time: Convert to hotplug state machine clocksource/atlas7: Convert to hotplug state machine clocksource/armada-370-xp: Convert to hotplug state machine clocksource/exynos_mct: Convert to hotplug state machine clocksource/arm_global_timer: Convert to hotplug state machine rcu: Convert rcutree to hotplug state machine KVM/arm/arm64/vgic-new: Convert to hotplug state machine smp/cfd: Convert core to hotplug state machine x86/x2apic: Convert to CPU hotplug state machine profile: Convert to hotplug state machine timers/core: Convert to hotplug state machine hrtimer: Convert to hotplug state machine x86/tboot: Convert to hotplug state machine arm64/armv8 deprecated: Convert to hotplug state machine hwtracing/coresight-etm4x: Convert to hotplug state machine ...
2016-07-25x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_opVitaly Kuznetsov
HYPERVISOR_vcpu_op() passes Linux's idea of vCPU id as a parameter while Xen's idea is expected. In some cases these ideas diverge so we need to do remapping. Convert all callers of HYPERVISOR_vcpu_op() to use xen_vcpu_nr(). Leave xen_fill_possible_map() and xen_filter_cpu_maps() intact as they're only being called by PV guests before perpu areas are initialized. While the issue could be solved by switching to early_percpu for xen_vcpu_id I think it's not worth it: PV guests will probably never get to the point where their idea of vCPU id diverges from Xen's. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-25xen: introduce xen_vcpu_id mappingVitaly Kuznetsov
It may happen that Xen's and Linux's ideas of vCPU id diverge. In particular, when we crash on a secondary vCPU we may want to do kdump and unlike plain kexec where we do migrate_to_reboot_cpu() we try booting on the vCPU which crashed. This doesn't work very well for PVHVM guests as we have a number of hypercalls where we pass vCPU id as a parameter. These hypercalls either fail or do something unexpected. To solve the issue introduce percpu xen_vcpu_id mapping. ARM and PV guests get direct mapping for now. Boot CPU for PVHVM guest gets its id from CPUID. With secondary CPUs it is a bit more trickier. Currently, we initialize IPI vectors before these CPUs boot so we can't use CPUID. Use ACPI ids from MADT instead. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-15arm/xen: Convert to hotplug state machineRichard Cochran
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. The get_cpu() in xen_starting_cpu() boils down to preempt_disable() since we already know the CPU we run on. Disabling preemption shouldn't be required here from what I see since it we don't switch CPUs while invoking the function. Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arm-kernel@lists.infradead.org Cc: rt@linutronix.de Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20160713153336.971559670@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-07-06arm/xen: add support for vm_assist hypercallJuergen Gross
Add support for the Xen HYPERVISOR_vm_assist hypercall. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Julien Grall <julien.grall@arm.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-06xen: add steal_clock support on x86Juergen Gross
The pv_time_ops structure contains a function pointer for the "steal_clock" functionality used only by KVM and Xen on ARM. Xen on x86 uses its own mechanism to account for the "stolen" time a thread wasn't able to run due to hypervisor scheduling. Add support in Xen arch independent time handling for this feature by moving it out of the arm arch into drivers/xen and remove the x86 Xen hack. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2016-07-06Xen: EFI: Parse DT parameters for Xen specific UEFIShannon Zhao
The EFI DT parameters for bare metal are located under /chosen node, while for Xen Dom0 they are located under /hyperviosr/uefi node. These parameters under /chosen and /hyperviosr/uefi are not expected to appear at the same time. Parse these EFI parameters and initialize EFI like the way for bare metal except the runtime services because the runtime services for Xen Dom0 are available through hypercalls and they are always enabled. So it sets the EFI_RUNTIME_SERVICES flag if it finds /hyperviosr/uefi node and bails out in arm_enable_runtime_services() when EFI_RUNTIME_SERVICES flag is set already. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
2016-07-06ARM64: XEN: Add a function to initialize Xen specific UEFI runtime servicesShannon Zhao
When running on Xen hypervisor, runtime services are supported through hypercall. Add a Xen specific function to initialize runtime services. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Tested-by: Julien Grall <julien.grall@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-06ARM: XEN: Move xen_early_init() before efi_init()Shannon Zhao
Move xen_early_init() before efi_init(), then when calling efi_init() could initialize Xen specific UEFI. Check if it runs on Xen hypervisor through the flat dts. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Julien Grall <julien.grall@arm.com> Tested-by: Julien Grall <julien.grall@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
2016-07-06arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPIShannon Zhao
The kernel will get the event-channel IRQ through HVM_PARAM_CALLBACK_IRQ. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Julien Grall <julien.grall@arm.com> Tested-by: Julien Grall <julien.grall@arm.com>
2016-07-06arm/xen: Use xen_xlate_map_ballooned_pages to setup grant tableShannon Zhao
Use xen_xlate_map_ballooned_pages to setup grant table. Then it doesn't rely on DT or ACPI to pass the start address and size of grant table. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Julien Grall <julien.grall@arm.com> Tested-by: Julien Grall <julien.grall@arm.com>
2015-12-21xen/arm: set the system time in Xen via the XENPF_settime64 hypercallStefano Stabellini
If Linux is running as dom0, call XENPF_settime64 to update the system time in Xen on pvclock_gtod notifications. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
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