/********************************************************************* * * Filename: parameters.h * Version: 1.0 * Description: A more general way to handle (pi,pl,pv) parameters * Status: Experimental. * Author: Dag Brattli * Created at: Mon Jun 7 08:47:28 1999 * Modified at: Sun Jan 30 14:05:14 2000 * Modified by: Dag Brattli * * Copyright (c) 1999-2000 Dag Brattli, 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 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 . * * Michel Dänzer , 10/2001 * - simplify irda_pv_t to avoid endianness issues * ********************************************************************/ #ifndef IRDA_PARAMS_H #define IRDA_PARAMS_H /* * The currently supported types. Beware not to change the sequence since * it a good reason why the sized integers has a value equal to their size */ typedef enum { PV_INTEGER, /* Integer of any (pl) length */ PV_INT_8_BITS, /* Integer of 8 bits in length */ PV_INT_16_BITS, /* Integer of 16 bits in length */ PV_STRING, /* \0 terminated string */ PV_INT_32_BITS, /* Integer of 32 bits in length */ PV_OCT_SEQ, /* Octet sequence */ PV_NO_VALUE /* Does not contain any value (pl=0) */ } PV_TYPE; /* Bit 7 of type field */ #define PV_BIG_ENDIAN 0x80 #define PV_LITTLE_ENDIAN 0x00 #define PV_MASK 0x7f /* To mask away endian bit */ #define PV_PUT 0 #define PV_GET 1 typedef union { char *c; __u32 i; __u32 *ip; } irda_pv_t; typedef struct { __u8 pi; __u8 pl; irda_pv_t pv; } irda_param_t; typedef int (*PI_HANDLER)(void *self, irda_param_t *param, int get); typedef int (*PV_HANDLER)(void *self, __u8 *buf, int len, __u8 pi, PV_TYPE type, PI_HANDLER func); typedef struct { const PI_HANDLER func; /* Handler for this parameter identifier */ PV_TYPE type; /* Data type for this parameter */ } pi_minor_info_t; typedef struct { const pi_minor_info_t *pi_minor_call_table; int len; } pi_major_info_t; typedef struct { const pi_major_info_t *tables; int len; __u8 pi_mask; int pi_major_offset; } pi_param_info_t; int irda_param_pack(__u8 *buf, char *fmt, ...); int irda_param_insert(void *self, __u8 pi, __u8 *buf, int len, pi_param_info_t *info); int irda_param_extract_all(void *self, __u8 *buf, int len, pi_param_info_t *info); #define irda_param_insert_byte(buf,pi,pv) irda_param_pack(buf,"bbb",pi,1,pv) #endif /* IRDA_PARAMS_H */ e&id=d7df2443cd5f67fc6ee7c05a88e4996e8177f91b'>acpi/pcc.h
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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /include/acpi/pcc.h
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/acpi/pcc.h')