/* * Copyright (c) 2010 Intel Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #if !defined(_RDMA_IB_H) #define _RDMA_IB_H #include #include struct ib_addr { union { __u8 uib_addr8[16]; __be16 uib_addr16[8]; __be32 uib_addr32[4]; __be64 uib_addr64[2]; } ib_u; #define sib_addr8 ib_u.uib_addr8 #define sib_addr16 ib_u.uib_addr16 #define sib_addr32 ib_u.uib_addr32 #define sib_addr64 ib_u.uib_addr64 #define sib_raw ib_u.uib_addr8 #define sib_subnet_prefix ib_u.uib_addr64[0] #define sib_interface_id ib_u.uib_addr64[1] }; static inline int ib_addr_any(const struct ib_addr *a) { return ((a->sib_addr64[0] | a->sib_addr64[1]) == 0); } static inline int ib_addr_loopback(const struct ib_addr *a) { return ((a->sib_addr32[0] | a->sib_addr32[1] | a->sib_addr32[2] | (a->sib_addr32[3] ^ htonl(1))) == 0); } static inline void ib_addr_set(struct ib_addr *addr, __be32 w1, __be32 w2, __be32 w3, __be32 w4) { addr->sib_addr32[0] = w1; addr->sib_addr32[1] = w2; addr->sib_addr32[2] = w3; addr->sib_addr32[3] = w4; } static inline int ib_addr_cmp(const struct ib_addr *a1, const struct ib_addr *a2) { return memcmp(a1, a2, sizeof(struct ib_addr)); } struct sockaddr_ib { unsigned short int sib_family; /* AF_IB */ __be16 sib_pkey; __be32 sib_flowinfo; struct ib_addr sib_addr; __be64 sib_sid; __be64 sib_sid_mask; __u64 sib_scope_id; }; /* * The IB interfaces that use write() as bi-directional ioctl() are * fundamentally unsafe, since there are lots of ways to trigger "write()" * calls from various contexts with elevated privileges. That includes the * traditional suid executable error message writes, but also various kernel * interfaces that can write to file descriptors. * * This function provides protection for the legacy API by restricting the * calling context. */ static inline bool ib_safe_file_access(struct file *filp) { return filp->f_cred == current_cred() && segment_eq(get_fs(), USER_DS); } #endif /* _RDMA_IB_H */ mit/tools/testing/selftests?h=nds-private-remove&id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>selftests/x86
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /tools/testing/selftests/x86
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/testing/selftests/x86')