Revision 73863ab028579ed98c4f1f36d016536b1b415344 authored by Anton Vorontsov on 31 May 2012, 23:26:23 UTC, committed by Linus Torvalds on 01 June 2012, 00:49:29 UTC
Current CPU hotplug code has some task->mm handling issues: 1. Working with task->mm w/o getting mm or grabing the task lock is dangerous as ->mm might disappear (exit_mm() assigns NULL under task_lock(), so tasklist lock is not enough). We can't use get_task_mm()/mmput() pair as mmput() might sleep, so we must take the task lock while handle its mm. 2. Checking for process->mm is not enough because process' main thread may exit or detach its mm via use_mm(), but other threads may still have a valid mm. To fix this we would need to use find_lock_task_mm(), which would walk up all threads and returns an appropriate task (with task lock held). clear_tasks_mm_cpumask() has all the issues fixed, so let's use it. Suggested-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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picoxcell_crypto_regs.h
/*
* Copyright (c) 2010 Picochip Ltd., Jamie Iles
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __PICOXCELL_CRYPTO_REGS_H__
#define __PICOXCELL_CRYPTO_REGS_H__
#define SPA_STATUS_OK 0
#define SPA_STATUS_ICV_FAIL 1
#define SPA_STATUS_MEMORY_ERROR 2
#define SPA_STATUS_BLOCK_ERROR 3
#define SPA_IRQ_CTRL_STAT_CNT_OFFSET 16
#define SPA_IRQ_STAT_STAT_MASK (1 << 4)
#define SPA_FIFO_STAT_STAT_OFFSET 16
#define SPA_FIFO_STAT_STAT_CNT_MASK (0x3F << SPA_FIFO_STAT_STAT_OFFSET)
#define SPA_STATUS_RES_CODE_OFFSET 24
#define SPA_STATUS_RES_CODE_MASK (0x3 << SPA_STATUS_RES_CODE_OFFSET)
#define SPA_KEY_SZ_CTX_INDEX_OFFSET 8
#define SPA_KEY_SZ_CIPHER_OFFSET 31
#define SPA_IRQ_EN_REG_OFFSET 0x00000000
#define SPA_IRQ_STAT_REG_OFFSET 0x00000004
#define SPA_IRQ_CTRL_REG_OFFSET 0x00000008
#define SPA_FIFO_STAT_REG_OFFSET 0x0000000C
#define SPA_SDMA_BRST_SZ_REG_OFFSET 0x00000010
#define SPA_SRC_PTR_REG_OFFSET 0x00000020
#define SPA_DST_PTR_REG_OFFSET 0x00000024
#define SPA_OFFSET_REG_OFFSET 0x00000028
#define SPA_AAD_LEN_REG_OFFSET 0x0000002C
#define SPA_PROC_LEN_REG_OFFSET 0x00000030
#define SPA_ICV_LEN_REG_OFFSET 0x00000034
#define SPA_ICV_OFFSET_REG_OFFSET 0x00000038
#define SPA_SW_CTRL_REG_OFFSET 0x0000003C
#define SPA_CTRL_REG_OFFSET 0x00000040
#define SPA_AUX_INFO_REG_OFFSET 0x0000004C
#define SPA_STAT_POP_REG_OFFSET 0x00000050
#define SPA_STATUS_REG_OFFSET 0x00000054
#define SPA_KEY_SZ_REG_OFFSET 0x00000100
#define SPA_CIPH_KEY_BASE_REG_OFFSET 0x00004000
#define SPA_HASH_KEY_BASE_REG_OFFSET 0x00008000
#define SPA_RC4_CTX_BASE_REG_OFFSET 0x00020000
#define SPA_IRQ_EN_REG_RESET 0x00000000
#define SPA_IRQ_CTRL_REG_RESET 0x00000000
#define SPA_FIFO_STAT_REG_RESET 0x00000000
#define SPA_SDMA_BRST_SZ_REG_RESET 0x00000000
#define SPA_SRC_PTR_REG_RESET 0x00000000
#define SPA_DST_PTR_REG_RESET 0x00000000
#define SPA_OFFSET_REG_RESET 0x00000000
#define SPA_AAD_LEN_REG_RESET 0x00000000
#define SPA_PROC_LEN_REG_RESET 0x00000000
#define SPA_ICV_LEN_REG_RESET 0x00000000
#define SPA_ICV_OFFSET_REG_RESET 0x00000000
#define SPA_SW_CTRL_REG_RESET 0x00000000
#define SPA_CTRL_REG_RESET 0x00000000
#define SPA_AUX_INFO_REG_RESET 0x00000000
#define SPA_STAT_POP_REG_RESET 0x00000000
#define SPA_STATUS_REG_RESET 0x00000000
#define SPA_KEY_SZ_REG_RESET 0x00000000
#define SPA_CTRL_HASH_ALG_IDX 4
#define SPA_CTRL_CIPH_MODE_IDX 8
#define SPA_CTRL_HASH_MODE_IDX 12
#define SPA_CTRL_CTX_IDX 16
#define SPA_CTRL_ENCRYPT_IDX 24
#define SPA_CTRL_AAD_COPY 25
#define SPA_CTRL_ICV_PT 26
#define SPA_CTRL_ICV_ENC 27
#define SPA_CTRL_ICV_APPEND 28
#define SPA_CTRL_KEY_EXP 29
#define SPA_KEY_SZ_CXT_IDX 8
#define SPA_KEY_SZ_CIPHER_IDX 31
#define SPA_IRQ_EN_CMD0_EN (1 << 0)
#define SPA_IRQ_EN_STAT_EN (1 << 4)
#define SPA_IRQ_EN_GLBL_EN (1 << 31)
#define SPA_CTRL_CIPH_ALG_NULL 0x00
#define SPA_CTRL_CIPH_ALG_DES 0x01
#define SPA_CTRL_CIPH_ALG_AES 0x02
#define SPA_CTRL_CIPH_ALG_RC4 0x03
#define SPA_CTRL_CIPH_ALG_MULTI2 0x04
#define SPA_CTRL_CIPH_ALG_KASUMI 0x05
#define SPA_CTRL_HASH_ALG_NULL (0x00 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_MD5 (0x01 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_SHA (0x02 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_SHA224 (0x03 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_SHA256 (0x04 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_SHA384 (0x05 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_SHA512 (0x06 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_AESMAC (0x07 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_AESCMAC (0x08 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_HASH_ALG_KASF9 (0x09 << SPA_CTRL_HASH_ALG_IDX)
#define SPA_CTRL_CIPH_MODE_NULL (0x00 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_ECB (0x00 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_CBC (0x01 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_CTR (0x02 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_CCM (0x03 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_GCM (0x05 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_OFB (0x07 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_CFB (0x08 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_CIPH_MODE_F8 (0x09 << SPA_CTRL_CIPH_MODE_IDX)
#define SPA_CTRL_HASH_MODE_RAW (0x00 << SPA_CTRL_HASH_MODE_IDX)
#define SPA_CTRL_HASH_MODE_SSLMAC (0x01 << SPA_CTRL_HASH_MODE_IDX)
#define SPA_CTRL_HASH_MODE_HMAC (0x02 << SPA_CTRL_HASH_MODE_IDX)
#define SPA_FIFO_STAT_EMPTY (1 << 31)
#define SPA_FIFO_CMD_FULL (1 << 7)
#endif /* __PICOXCELL_CRYPTO_REGS_H__ */
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