/* * Intel SST generic IPC Support * * Copyright (C) 2015, Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * 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. * */ #ifndef __SST_GENERIC_IPC_H #define __SST_GENERIC_IPC_H #include #include #include #include #include #include #define IPC_MAX_MAILBOX_BYTES 256 struct ipc_message { struct list_head list; u64 header; /* direction wrt host CPU */ char *tx_data; size_t tx_size; char *rx_data; size_t rx_size; wait_queue_head_t waitq; bool pending; bool complete; bool wait; int errno; }; struct sst_generic_ipc; struct sst_plat_ipc_ops { void (*tx_msg)(struct sst_generic_ipc *, struct ipc_message *); void (*shim_dbg)(struct sst_generic_ipc *, const char *); void (*tx_data_copy)(struct ipc_message *, char *, size_t); u64 (*reply_msg_match)(u64 header, u64 *mask); bool (*is_dsp_busy)(struct sst_dsp *dsp); int (*check_dsp_lp_on)(struct sst_dsp *dsp, bool state); }; /* SST generic IPC data */ struct sst_generic_ipc { struct device *dev; struct sst_dsp *dsp; /* IPC messaging */ struct list_head tx_list; struct list_head rx_list; struct list_head empty_list; wait_queue_head_t wait_txq; struct task_struct *tx_thread; struct work_struct kwork; bool pending; struct ipc_message *msg; int tx_data_max_size; int rx_data_max_size; struct sst_plat_ipc_ops ops; }; int sst_ipc_tx_message_wait(struct sst_generic_ipc *ipc, u64 header, void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes); int sst_ipc_tx_message_nowait(struct sst_generic_ipc *ipc, u64 header, void *tx_data, size_t tx_bytes); int sst_ipc_tx_message_nopm(struct sst_generic_ipc *ipc, u64 header, void *tx_data, size_t tx_bytes, void *rx_data, size_t rx_bytes); struct ipc_message *sst_ipc_reply_find_msg(struct sst_generic_ipc *ipc, u64 header); void sst_ipc_tx_msg_reply_complete(struct sst_generic_ipc *ipc, struct ipc_message *msg); void sst_ipc_drop_all(struct sst_generic_ipc *ipc); int sst_ipc_init(struct sst_generic_ipc *ipc); void sst_ipc_fini(struct sst_generic_ipc *ipc); #endif den' name='h' value='nds-private-remove'/>
path: root/tools/build/feature/test-libcrypto.c
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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/build/feature/test-libcrypto.c
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/build/feature/test-libcrypto.c')